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Series 200 Line Scan Measurement System User`s Manual

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2. Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 26 Main Menu Press any key at any time from the Running Screen to get to the Main Menu Main Menu 1 Measure 4 Data 2 Camera 5 Out put 3 Limits 6 Other Action Choose the general category of setup functions you would like to work with Measure Leads to menus for defining your Measures Camera Leads to menus governing the scanning function of the camera Limits Leads to menus defining Bad Scans limits and alarm conditions Data Leads to menus governing the interpretation of Measures Output Leads to menus controlling use of data by the I O board or serial port Other Leads to menus controlling the number of cameras in the System or any custom features that might be unique to your unit Main Menu gt Measure The Select Measure Menu Measure LAHLFOs Measure 2AHLFOs Measure 3AHLFOs Measure 4AHLFOs Action Indicate which of four possible Measures you want to work with A choice from this menu will lead to the For Measure menu at which you can select the actions you would This menu appears like to take for this Measure You may return to this menu several times until any time you make you have chosen and specified actions for all your Measures You must have at a setting that is least one active measure for the System to work specific to an individual Measure The Displayed Measure An asterisk before one of the Measures indicates To make
3. Action Set the number of milliseconds the camera waits between a trigger and the start of a scan Use the A B C and D keys as described on page 34 to increase or decrease the number displayed in the Value field When you have reached the value you want to set press the key The allowable delay range is 0 milliseconds to 999 milliseconds Charge accumulated during the delay time is discarded and does not contribute to the scan that follows the delay Scan Timing gt Trigger The Scan Trigger Menu Scan Trigger 1 Free Running 2 Rising edge trig 3 Falling edge trig Action Select the event that triggers the start of each scan Free running Sets continuous scanning Each new scan follows the previous scan without waiting for a trigger Note that if you have set Delay time to something other than 0 there will be a delay between the end of one scan and the start of the next Rising edge trig Triggers the start of a scan based on a rising edge of AUX input from the I O Board The first rising edge after the end of the previous scan will trigger the next scan If you have set a delay the trigger will begin the delay Falling edge trig Triggers the start of a scan based on a falling edge of AUX input from the I O Board The first rising edge after the end of the previous scan will trigger the next scan If you have set a delay the trigger will begin the delay There will be a pause between the trigger and the start of the scan
4. Figure 8 I O Board Mounting Detail Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 13 g Y Z z L L Z J l I a fal R ce e Isle gt gog go gog Ssssssss Ssssssssss ade Wz I m OO Toz HO gt Ik x Zz PP Pe O E O S j T 5B aD L d T S g gt 4 lt xX X 5 TBE TB5 C Figure 9 Lower part of the I O Board showing connectors The parts of the I O Board are ID Switch The ID switch determines the Measure to which the relays and analog output respond On the I O Board inside the Control Unit this switch is preset to select Measure 1 If you have multiple I O Boards you will probably be using them for other Measures ID Switch Settings for the I O Board SW1 OFF ON OFF ON SW2 OFF OFF ON ON Measure 1 2 3 3 Relays There are three alarm relays of type SPDT 1 Form C The contacts are rated at 60 VDC 30W 2A or 120VAC 60VA 2A Relay Kl K2 K3 Function High Limit Low Limit Bad Scans LEDs above terminal block TB5 light when the relays are energized See page 38 to learn how to program the relays AUX The AUX input TB6 1 and TB 2 is an isolated digital input for connection to an external switch The function of this multipurpos
5. 13 BEGinning Counts edges from the beginning BEG END Counts edges from the end END If you are working with a single position you have chosen Position from the Define Measure menu the Count Px From menu will appear only once Its header will read Count P From and two other menus discussed below will follow asking for further information about P the P on Feature menu and the P Is menu If you are working with a Difference or a Midpoint choice of Diff or Midpt at the Define Measure menu this series of three menus will appear twice once for each of your two positions The first time the headers will refer to P1 and the second time to P2 You can choose to count both edges from either BEG or END or one from each This menu appears only if you have chosen Diff from the D efine Measure menu If you have chosen Position or Midpt the Count PX menu appears directly instead Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 31 The Px on Feature Menu Px on Feature Px on Feature 0 Beg 3 B3 0 End 3 E3 1 B1 4 B4 1 E1 4 E4 2 B2 5 B5 2 2 5 5 Action Specify which feature contains your position Px If you selected BEG on the Count Px From menu the menu choices here will be Bx features If you selected END the choices will be Ex features See Figure 13 for a definition of Bx and Ex features If you are using one position only the menu header will read P on Feature If you are using two position
6. The Rejected Width Menu Rejected Width Li ght Rejected Width Dark Previous XXX Previous XXX Enter new _ Enter new Must be in pixels Must be in pixels Rejected Width Basic Previous XXX Enter new __ Must be in pixels Action Enter the minimum number of pixels that a Feature must exceed for it to be included as a significant Feature The title of this menu will contain the word Basic Light or Dark depending upon the choice you made at the Discriminators menu Main Menu gt Limits The Limits Menu Limits 1 Bad scans 2 Alarm limits 3 Duration Action Decide to set limits that are to trigger specific actions and or to define bad scans and the actions they trigger Relay Time Once triggered a relay Bad scans Leads to menus for specifying how to handle Bad Scans oer mer will stay that way as Alarm limits Leads to menus for setting high or Low Limits for long as the triggering alarms condition remains or Duration Leads to menus for specifying relay and buzzer hold for a time you specify times whichever is longer Bad Scans and Alarm Limits After each scan the System compares the number and positions of the edges of the scan to the criteria that you have specified using the Limits menus The first test determines if the number of detected edges meets the standards you have set at the Minimum Edge Count and Required Edge Count menus See pages 40 and 41 Ifa scan contains an accepta
7. because it reflects information residing in non volatile memory It shows the last settings you made for the Measure You can then choose later to reactivate the Measure keeping its original settings A inthe first position means that the average value is displayed instead of a single scan value in the second position means that the High Limit is active in the third position means that the Low Limit is active a blank will appear in this position in the fourth position means that the Measure is selected for Flaw Detection in the fifth position means that an Offset is added to the Measure omr z If external serial upload of the measure has been selected the character in the sixth position indicates which value s of the measure will be included in the upload If s is M The single scan value of the Measure will be included A The average value of the Measure will be included B Both will be included blank Neither will be included The For Measure Menu For Measure n 1 Define 4 Off 2 Flaw Detect 3 Display average Action Indicate what you want to do with the Measure you have just selected Define Leads to menus that allow you to define the properties of the selected Measure See Defining Measures on page 29 for a discussion Flaw detect Toggles Flaw Detection on or off for the current Measure See Flaw Detection on page 29 Display average Toggles the display of the Measure s average instead of its single scan value See
8. Don t use buzzer Action Decide if the buzzer s will sound when a Bad Scan alarm occurs Note that this sounds the buzzers on all I O boards Sound buzzer Triggers the buzzer when a Bad Scan alarm occurs Don t use buzzer Disables use of the buzzer regardless of the number of Bad Scans detected The Bad Scan Latching Menu Bad Scan Latching 1 Latch 2 Don t latch Action Decide whether or not to latch a Bad Scan alarm Latch A Bad Scan alarm remains in effect until you turn it off with the Reset switch or cycle the power to the Control Unit Don t latch A Bad Scan alarm terminates when a good scan is received The relay and buzzer may remain in their alarm state longer if the minimum time requirement has not yet been met Set up the minimum times at the Minimum Relay Hold and Minimum Buzzer Hold menus page 46 Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 42 Limits Menu gt Alarm Limits The Alarm Limits Menu Alarm Limits 1 High limit 2 Low limit 3 Hysteresis Action Specify some settings for the handling of limits and associated alarms This menu follows a choice of Alarm Limits from the Limits menu High limit Leads to a series of menus for setting or deactivating a High Limit alarm Low limit Leads to a series of menus for setting or deactivating a Low Limit alarm Hysteresis Leads to a menu for setting the range above a Low Limit or below a High Limit that will cause a triggered alarm
9. For adjusting voltage and current analog outputs RP1 V GAIN Sets the gain for voltage output at TB6 5 amp 6 Maximum gain will produce 10 Vdc output RP2 V OFF Sets the offset voltage at TB6 5 amp 6 RO3 I GAIN Sets the gain for the current output at TB6 7 amp 8 Maximum gain will produce 20 mA output System Interconnections You will have to make some connections between the camera and Control Unit and to the relays and analog output on the I O Board Refer to Figure7 and Figure 10 to make these connections Connect the cable between CAM1 and the Control Unit for camera 1 Connect the cable between CAM2 and the Control Unit if you are using a second camera Connect an external horn light etc to the terminal blocks TBS and TB6 See Tables on page 15 Connect input wires for power to the 115V power connection Note that the on off switch in the lower right corner of the Controller Board which is located inside the Control Unit turns power on or off to the Line Scan System 000 CAM 1 CAM 2 1 0 Power Bottom of Control Box Figure 10 The bottom of the Control Unit showing places for connections Camera Adjustment You will have to mount the camera so that the target is in proper focus on the array a process that requires an oscilloscope with an external trigger input Tip 1 Set up the oscilloscope It is a good idea to perform the y initial setup of
10. The Count Px From menu appears next unless you have chosen Diff In that case the Type of Difference menu appears next followed by the Count Px From menu Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 30 The Type of Difference Menu Type of Difference 1 Total light dark 2 Total light 3 Total dark Action Specify how you want to measure the difference between your two positions P1 and P2 Total light dark Counts the total number of pixels between your two positions Total light Counts only the light pixels between your two positions Total dark Counts only the dark pixels between your two positions For example consider a moving strip of opaque material lit from behind If the field of view includes the backlight on either side of the strip there will be two light features one on either side of the strip If it were possible to have holes in the strip you might want to ensure that overly large or multiple holes in the material never reduce the amount of strip material below a certain amount If you set up a Measure that counts Total 16 See page 35 Lights from one edge of the strip to the other you would obtain the information you need without having to know how many holes contribute to light pixels The maximum number of edges is The Count Px From Menu Count Px From 1 BEGinning 2 END Action Specify whether you are counting edges from the beginning or end of the scan image See Figure
11. V3 01 April 19 2004 Page 47 Averaging The Line Scan System software calculates a form of running average using these formulas If n is the integer you have chosen at the Running Average menu NewCumulative is the newly calculated cumulative value for your Measure OldCumulative is the cumulative value as of the previous scan NewMeasure is the Measure value from the current scan OldAverage is the NewAverage from the previous scan then NewAverage NewCumulative 0 5 0 5 is added to avoid errors from rounding low 2 where NewCumulative OldCumulative NewMeasure OldAverage To seed the average the software sets NewCumulative equal to 2 times NewMeasure This results in NewAverage equaling NewMeasure and subsequent values will adjust the average smoothly At the next menu you can choose to limit the data used in the Averaging algorithm to values greater than the current average The Maximize Average Menu Maximize Average 1 On 2 Of f Discard values lt avg Action Choose to discard measurements that are less than the current average value On Limits the Averaging algorithm to using only Measures that are greater than the current value of average Off Uses all measurements in the Averaging algorithm This setting is useful if you are interested in how large a Feature especially a flaw has grown By eliminating all values smaller than the current average the average either remains the same or increases ref
12. a Remote I O Board To connect a remote I O Board to the Controller Board wire J7 or J8 on the Controller Board to TB2 on the remote T O Board Connect each pin on the Controller Board to the corresponding pin on the remote I O board pin 1 to pin 1 pin 2 to pin 2 etc The terminal blocks accept wires between 16 and 28 AWG Pins 4 and 5 must be a twisted pair TB5 Terminal Block on the I O Board Customer connection block for relay outputs TB5 1 2 amp 3 High Limit relay TB5 4 5 amp 6 Low Limit relay TB5 7 8 amp 9 Bad Scan relay lform C contacts 2A at 120Vac resistive TB6 Terminal Block on the I O Board Customer connection block for analog outputs and digital inputs TB6 1 8 amp 2 Auxiliary input Multipurpose signal used by Zero on door AUX mounted switch or by Scan Trigger or for custom applications TB6 3 8 amp 4 Connect to customer external switch Function same as door STOP RUN mounted Run Stop switch Closing switch stops measurements and resets unit TB6 5 amp 6 Outputs an analog voltage proportional to the selected Vout Measure See Table 3 for gain and offset adjustments ou Maximum range is 0 to 10 Vdc TB6 78 8 Outputs a current proportional to the selected Measure See lout Table below for gain adjustments Maximum range is O to 20 mA Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 15 Adjustment Pots on the I O Board
13. and right edges See Figure 14 All Measures are based on either a single edge or a pair of those edges Features are defined by counting a specific number of edges from the left or right ends of a scan The appearance of unexpected edges in a scan can disrupt the association of a feature with the proper physical attribute of the target giving incorrect results B2 B4 BEG E4 E2 END Bi B3 BS ES E3 E1 Figure 13 This is a schematic representation of a series of dark and light features on a target This target has five features which can be thought of as B1 to B5 counting from BEG or E1 to E5 counting from END in addition to the Features BEG and END Notice that BEG and END are always darks so lights are below the base level Flaw Detection Flaw Detection permits finding and measuring of transient features that are not present normally To set up the System for Flaw Detection 1 Define a Measure for your flaw as if it were always present 2 From the For Measure menu select Flaw detect for that Measure 3 At the Minimum Edge Count menu use the number of edges you expect without the presence of a flaw See page 40 4 Atthe Required Edge Count menu select option 2 or 3 See page 41 Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 29 The System will then set the Measure value to zero when it detects exactly the minimum number of edges meaning the flaw is not present If it detects more than the minimum number o
14. displayed by the Line Scan System that is numerical values are not padded with zeros on the left to create fixed length strings Frame Contents The first Numerical value in each Frame is a Flag Byte with value between 0 and 255 The Flag Byte Bit Description 0 Bad Scan for this single scan 1 Bad Scan alarm active 2 High Limit alarm active 3 Low Limit alarm active 4 Bad Scan alarm occurred since last Frame 5 Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 51 High Limit alarm occurred since last Frame Low Limit alarm occurred since last Frame Flaw detected since last Frame The remaining Numerical values in the Frame are Measure values The Frame will contain only the selected Measure and average Measure values Regardless of the order of selection the Frame begins with Measure 1 and ends with Measure 4 The single scan value of a Measure always precedes the average value if you include both See page 12 for the wiring connections necessary to connect to the RS232 and RS422 connectors on the controller board The RS422 signal is identical to the RS232 as far as the data stream is concerned but it transmits using RS422 electrical specifications Use the RS422 connection in noisy environments or if you are using high baud rates and long cables Output Menu gt Analog The Analog Output Menu Analog Output 1 Use average 2 Don t use average Actio
15. for the length of time you select under Delay time unless you have set it to 0 If you choose to use triggering the trigger pulse must be present for at least 200 uS and the actual trigger may be delayed by as much as 100 uS from the leading edge of the trigger signal See TB6 on page 15 Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 35 Camera Menu gt Threshold The Threshold Menu Threshold Edges nn Value Xxx A Up 10 D Dn 10 B Up 1 C Dn 1 Action Define the dividing line between light 0 and dark 1 pixels in the output stream Use the A B C and D keys to increase or decrease the value of the dividing line between light and dark Use these keys as described under the Scan Time menu on page 34 The output of the linear array detector is an analog signal that must be converted to an array of zeros and ones before further processing To do this the Line Scan System compares the analog value from each array pixel to a threshold level recording it as a dark 1 if it exceeds the threshold or a light 0 otherwise The range of allowable threshold values is 0 to 100 representing a voltage level for comparison to the output of the array The 0 to 100 range is larger than the possible analog output of the array To set the threshold value in a meaningful way you must use a dual trace oscilloscope to compare the analog voltage from the linear array to the threshold voltage as you adjust the Threshold value Bot
16. only the analog output on the I O board configured for Measure 2 The gain and offset adjustments on the T O board set the relationship between Measure value and electrical output See page 13 The Line Scan System supports a general purpose asynchronous serial upload facility Well defined Frames containing only ASCII characters send status and Measure values The number of scans and or certain special events determines the Frame rate Each Frame contains a set of flags that indicate Bad Scans flaws and alarms as well as a selected set of Measure values The Line Scan System only transmits it does not expect or need any serial input and will ignore anything sent to it The Serial Frame Format Overview All commands and responses are in printable ASCII Not case sensitive Frames uploaded according to setup parameters with no flow control You must select setup parameters to avoid a data stream that overruns the receiver Each Frame begins and ends with a unique character The receiver must handle all error recovery logic Frame Syntax Each Frame sent from the Line Scan to the receiver begins with gt and ends with CRLF The start and end characters gt and CRLF are unique and appear nowhere else in the Frame Commas separate the numerical values in the Frame Numerical values contain only the digits 0 through 9 and the characters and decimal point Numerical values have the form
17. page 48 for a discussion of Averaging Display average refers to the display on the LCD of the Controller Board If the Measure you are working with is the one displayed on the front panel of the Control Unit the average will be displayed there as well as on the LCD of the internal Controller Board Off Makes the Measure inactive meaning the System will not calculate any values for it If you make a Measure inactive its settings will remain and you can activate it again by selecting it from the Select Measure menu Both Display average and Flaw detect are toggles so you will not exit the menu after you choose either of them You must press the key to exit the menu if you are finished with the For Measure n menu If you are not finished selecting either Define or Off will exit the menu as well Press the key to exit the menu and discard your selections A plus sign next to Display average or Flaw detect indicates that it is on a minus sign indicates that it is off Measure 1 is always the Measure displayed on the front panel of the Control Unit unless you have changed the ID on the Display Board from the factory setting Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 28 Defining Measures A Measure is a number that represents a position relative to the beginning of the scan image or the distance between two positions You have to specify what you want the System to measure for your application and f
18. strip as given in the first example A Bad Scan is not related to a particular Measure so responses are System wide For example a Bad Scan will activate the K3 relay on all I O boards The series of menus that follow a choice of Bad scans from the Limits menu allows you to set up the System response to Bad Scans At these menus you can specify the number of Bad Scans that will trigger an alarm whether the K3 relay will be open closed or inactive following an alarm if the buzzer should sound and if the alarm should be latched or unlatched Limits Menu gt Bad Scans The Minimum Edge Count Menu Mi ni mum Edge Count Value xx B Up 2 C Dn 2 Action Specify the minimum number of edges that a scan must detect for the scan to count as good Any scan with fewer edges than the number you specify here is a Bad Scan The next menu Required Edge Count lets you specify how to handle scans that have more than the minimum number of edges Use the B key to increase the value by 2 and the C key to i Bad Scans do not contribute decrease it by 2 The allowed range is 0 to 16 Any scan with ie to averaging or to values more than 16 edges will be classified unconditionally as a Bad used for limit testing Scan Note that since edges occur in pairs only even numbers are available Since the Line Scan System bases all measurements on edge locations missing or extra edges are likely to lead to completely invalid results You mu
19. 3 The linear array is projected onto the scanned target Each full scan covers a fixed sized band of the target Figure 4 Each pixel of the linear array is projected onto a band of fixed width and height for each scan The speed of the target multiplied by the scan time gives the height of the band A pixel accumulates the Integrated light from the entire band Note that only the total charge on a band is evaluated effectively losing any variations along the direction of the scanned band This does not however mean that features smaller than the band length cannot be detected For example suppose your application requires detection of small holes in an opaque material moving at a speed that produces a band several times longer than the diameter of a hole Bright light from behind the material could allow enough light to get through a hole to exceed the threshold even though the light is present for only part of the scan time You would have to filter or mask off light shining around the sides of the material to prevent the array from blooming At the end of each scan the System calculates Measures based on the position of detected Edges and can use the results in several ways Using criteria you select at set up time the System can open or close relays and or sound a buzzer to alert you if a Measure deviates from a specified range It can also provide a continuous numerical display provide an analog output voltage or current p
20. GE OF 3 CAMERA TA proper lighting OBJEC is critical You must provide uniform lighting that allows adequate contrast for the System to work All measurements in inches correctly 1 4 20 THROUGH HOLE OR CUSTOMER MOUNTING Back lighting TYP With back lighting the target is between the light source and the camera Not only does it provide the greatest possible contrast but the fact that the light shines directly into the camera permits the fastest scan rate Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 10 Front lighting With front lighting the light is reflected from the surface of the target The reflective properties of the target s features must provide the needed contrast This often means choosing a slower scan rate to allow enough light to enter the camera Control Unit The Control Unit is a NEMA Type 4 wall mount enclosure containing the Controller Board the I O Board the Display Board the Power Supply and some internal cabling This Unit connects to the camera through a factory supplied interface cable When you are determining the location of the Unit consider the electrical interfacing and your need for access to the visual display on the door of the Control Unit Remote I O boards and displays are available for circumstances in which access to the Control Unit is not convenient There is a three position switch on the front of the Unit labelled Run Stop Zero It controls the STOP RU
21. Limit alarm remains in effect until the Measure value no longer violates the limit This includes Hysteresis see page 43 The relay and buzzer may remain in their alarm state longer if the minimum time you have chosen has not passed Set up the minimum times at the Minimum Buzzer Hold and Minimum Relay Hold menus Limits Menu gt Duration The Minimum Relay Hold Menu Minimum Relay Hold Value x xx sec A Up 0 1 D Dn 0 1 B Up 01 C Dn 01 Action Choose the minimum time that alarm relays will remain triggered If the alarm condition ends before this minimum time the relay remains triggered until the minimum time expires If the alarm persists after the minimum time the relay remains triggered until the alarm condition ends Use the A B C and D keys to increase or decrease the time The A and D keys move up and down by 0 1 second at a time the B and C keys to move up and down by 0 01 second at a time The allowable time range is 0 05 to 2 55 seconds but there is an uncertainty of about 30 milliseconds in the time The Minimum Buzzer Hold Menu Minimum Buzzer Hold Value xx x sec A Up 1 0 D Dn 1 0 B Up 0 1 C Dn 0 1 Action Choose the minimum time that buzzers will remain on If the alarm condition ends before this minimum time the buzzers remain on until the minimum time expires Ifthe alarm persists after the minimum time the buzzers remain on until the alarm condition ends Use the A B C and D keys to increa
22. Measure control the same relay To do this select OR with Measure 1 This selection is a toggle and is independent of the first two menu selections If you turn this selection on for any Measure other than Measure 1 an alarm for that Measure will also affect the limit relay associated with Measure 1 as if Measure 1 had an alarm This choice does not appear if you are setting up the parameters for Measure 1 The High Limit Buzzer and Low Limit Buzzer Menus High Limit Buzzer Low Limit Buzzer 1 Sound buzzer 1 Sound buzzer 2 No buzzer 2 No buzzer Action Decide if the buzzer will sound when a High or Low Limit triggers an action If you turn the buzzer on it will sound on all I O boards not just the one associated with the alarm Measure The buzzer s will sound for at least the minimum time that you set at the Minimum Buzzer Hold menu If the alarm condition lasts beyond the minimum time the buzzer s will continue sounding for the duration of the alarm and stop when the alarm condition ends Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 45 The High Limit Latching and Low Limit Latching Menus High Limit Latching Low Limit Latching 1 Latch 1 Latch 2 Don t latch 2 Don t latch Relay and buzzer Relay and buzzer Action Decide whether to latch a Limit alarm Latch A Limit alarm remains in effect until you turn it off with the Stop switch or cycle the power to the Control Unit Don t latch A
23. N and AUX signals on the TB6 connector of the I O board See page 13 Run makes the Sytem fully functional Stop causes supression of all limit violations and resetting of latched and average values although the System continues making measurements Zero resets position offsets if you have enabled offsets See page 50 10 750 10 250 k db TE O7 6 000 i All measurements in inches Figure 6 The Control Unit Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 11 RP1 RP2 TB6 TB5 I O Board 115VAC Controller RP3 RP4 Power Board Connection Figure 7 The inside of the Control Unit showing the keypad LCD display the Controller Board the I O Board and the Display Board The Controller Board The Controller Board is mounted inside the Control Unit The parts of the Controller Board are Switch S1 Located in the lower right corner of the Controller Board 1 turns power on or off to the System It does not switch the line power or the power to the power supply module Keypad For making entries into the software menus LCD Display Displays the running status at initial power setup See Part II Software Setup LED1 Located to the left of the display indicates power present J5 Connector for external RS232 and RS 422 signals J5 Connector on the Controller Board Customer connections for RS 232 amp RS 422 communications J5 1 12 volt
24. OMM port of the Controller Board Key in the number from 1 to 6 that corresponds to your choice The Serial Upload Trig Menu Serial Upload Trig 1 of scans 2 0n Alarm 3 0n Flaw Action Select the condition s that will cause a Frame to be sent You can choose one two or all three conditions They are toggles and can be chosen in any combination Each of the three choices is of scans Sends a Frame every n scans a toggle to its left indicates a choice is on On Alarm Sends a Frame when conditions trigger an alarm of any indicates off Select any type Another Frame will be sent when the alarm clears or all that you want to turn s on and when you are will be sent when the flaw disappears through press to go to the next menu On Flaw Sends a Frame when a flaw is detected Another Frame If you choose of scans two other menus will appear first that allow you to specify the way you want to count scans and how frequently you want a Frame uploaded The Select Measure and Serial For Measure n menus will follow See page 51 for the definition of a serial output Frame Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 53 Serial Upload Trig gt of Scans The Serial Count Type Menu Serial Count Type 1 Total scans 2 Good scans only Action Indicate which kind of scans contributes to the scan count This menu follows the Serial Upload Trig menu only if you have chosen of sc
25. Scan System Mounting the camera and controller for your Line Scan System is a critical step in ensuring its proper functioning in your environment Ordinarily before your System is shipped to you the optics are set at the factory using exact distances you supply The camera optics settings take into consideration the type of measurement you are making the maximum field of view required the acceptable range of distances from the front of the camera to the object under observation the maximum speed of the object under observation the required length of the cable between the camera and the Control Unit Do not change or move the optics or the System will no longer work correctly If you need to make any changes please call Customer Service for assistance See page 9 for Contact Information Providing a Mounting System for the Camera You will have to provide a mounting system for the camera that is appropriate for your application The camera is an industrial device protected in a 1 8 thick aluminum tube and endplates but it is also an optical system Please be sure to mount the camera in a non hostile environment Dust or grease settling on the glass front plate may affect proper operation of the System See Figure 5 Figure 5 Camera mounting information 0 625 CLEARANCE TO CAMERA TUBE YY Lighting J For most WORKING DISTANCE a gt MEASURED FROM applications 1 500 3 000 FRONT ED
26. Series 200 Line Scan Measurement System User s Manual Diversified Optronix Corporation Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 1 Diversified Optronix Corporation www divop com Limited Warranty Diversified Optronix Corp DOC warrants that its products Products will be free from defects in material and workmanship for a period of one 1 year from the date of purchase DOC will at its discretion repair or replace any Products part or parts found to be defective as a result of defective workmanship material or both All costs for packaging and transporting to Milford Connecticut are the responsibility of the customer and must be prepaid DOC will pay packaging and transportation costs to return item s to the customer Please include a copy of the packing slip or invoice identifying all returned material along with details of the problem or symptoms you are experiencing with Product Before you return any items please call or email for instructions and authorization Some problems can be resolved without any need for shipping the equipment DOC makes no other warranties express or implied This limited warranty does not apply to any defect failure or damage caused by improper usage or storage of Products DOC will not be obliged to provide warranty service for Products that were damaged from improper use or interconnection to external equipment that have been modified or tampered with or tha
27. System always uses the average value for the offset instead of the single scan value An offset not only zeroes the displayed output and the Measure values included in the serial upload but also sets the analog output associated with the Measure to half scale Main Menu gt Output The Output Menu Out put 1 Analog 2 Serial Action Set up the parameters for handling the output of the Line Scan System Analog Leads to a series of menus allowing you to set up your If you do not want to analog output display the last Serial Leads to a series of menus allowing you to set up your serial Measure you have output selected for analog output follow the If you choose Analog the Select Measure menu will follow to allow you directions on page 22after you finish all your analog output settinas to select the Measure for which you are making analog output settings The Analog Output menu will follow that If you choose Serial the Serial Output menu will follow directly since serial output is not associated with a particular Measure Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 50 Analog and Serial Output The I O boards generate analog output A System may have one or more I O boards and each has both a voltage and a current output proportional to the value of the Measure associated with the board In most cases each Measure is assigned a unique I O board so that for example the Measure 2 value will affect
28. a Meds reinactive that it will be displayed on the LCD of the ch o e the Measure fromthe Controller Board Although you can monitor up to Select Measure menu and select four Measures that is have up to four active Measures Off from the resulting For the Controller Board can display only one at a time Measure menu The most recently chosen Measure automatically becomes the displayed Measure To display a To reactivate a previously used measure and keep its settings different Measure than the one currently marked with select it from the Select Measure an asterisk simply select the Measure you want to menu then simply press at display from the Select Measure Menu and then press the resulting For Measure menu at the resulting For Measure menu If you make the displayed Measure inactive Measure 1 will be displayed There are two displays the LCD of the Controller Board located inside the Control Unit and the LED on the front panel of the Control Unit Here we are discussing the display on the board inside the Control Unit Measure 1 is always displayed on the LED of the front panel Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 27 A series of up to six characters AHLFOs may appear after any Measure These letters and or blanks in their places reflect choices you have made for the Measure at various menus discussed later in this manual Even if you make a Measure inactive the string will remain
29. a Processing Menu gt Set Zero Point The Offset to Zero Menu Offset to Zero 1 No offset 2 Zero output 3 Enable Zero sw Action Set or reset the zero point for the selected Measure enable the Reset switch No offset Sets the offset value to zero Zero output Creates an offset for the currently selected measure Your Standard target must be in place and the Measure value must be stable at the time you choose Zero output since its average value will be used as the offset for the selected Measure Enable Zero sw Allows the Zero switch to perform the Zero output function see previous choice simultaneously for all Measures with the Reset switch enabled Activation not release of the switch causes capture of the offset The purpose of an offset is to convert an absolute Measure value to a differential value An example would be converting a Measure representing the width of a moving strip to a Measure representing the deviation of the strip width from a standard width To create an offset use a target that produces a Measure value that you want to call zero Then tell the System to capture the currently measured value as an offset either by choosing the Zero output menu selection or with the Zero switch if you have enabled it The Measure that is zeroed by the menu selection is the Measure currently selected for display on the internal LCD The Zero switch zeroes simultaneously all Measures for which the Zero switch has been enabled The
30. all buzzers to sound Alarm limits are associated with specific Measures Any time you choose Alarm limits from the Limits menu you will be asked to specify a Measure before you set any of these parameters Hysteresis see page 43 is not associated with a particular Measure a single Hysteresis value applies in common to all High and Low Limits The series of menus that follows a choice of Alarm limits from the Limits menu allows you to compare the limit to a single scan value or an averaged value open or close a relay on alarm to activate the related Measure relay in addition to the relay for the selected Measure to latch or not latch the alarm and to sound or not sound the buzzer Bad Scan detection is fundamental to the operation of the Line Scan System since it determines which scans to use good scans and which to ignore Bad Scans The test to distinguish between the two consists of comparing the number of edges detected in a scan to the requirements you have set in the first two Bad Scan menus See the Minimum Edge Count and the Required Edge Count menus on pages 40 and 41 For a scan to be good the number of detected edges must at least equal the Minimum Edge Count and must meet the Required Edge Count as well Since the System calculates Measure values based on the positions of specific edges as counted from one end or the other of a scan it must be set up and adjusted properly It is essential that no stray edges appear in a wa
31. ameras Reserved This choice is reserved for future releases of the Line Scan software Other Menu gt Number of Cameras The Cameras Menu Cameras Restarts 1 One camera 2 Two Separate 3 Two Combi ned Action Indicate how many cameras you plan to use and how you will configure them One camera Enables use of a single camera Two Separate This option is not available with this version of the Line Scan System Two Combine This option is not available with this version of the Line Scan System Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 56
32. ameras covering only the edges of a wide target The arrows show the direction of motion of the target Please contact us with any questions and we will help you plan the System that works best for your application either using a combination of elements from the Line Scan System or one of our other Vision Family products See page 9 for Contact Information How Does the Line Scan System Work The Line Scan System looks for contrasts in brightness and measures their positions It focuses the target s image onto a 5000 element linear array of pixels each of which accumulates charge in proportion to the brightness it detects A single scan captures the charge accumulated on each of the 5000 pixels and compares the 5000 charge values to a threshold level If the charge value exceeds the threshold the Line Scan System considers it a zero otherwise it is a one This produces an array of 5000 ones and zeroes which the System examines for Edges that is for transitions from 0 to 1 and from 1 to 0 The positions of edges form the basis for all Line Scan System Measures A Measure can be the position of an Edge the distance between two Edges the position of a midpoint between two Edges the distance between an Edge and a midpoint or the distance between two midpoints The System supports up to four Measures You can set the scan time to be between mS and 99 9 mS Longer scan times integrate more light and are useful in low light environmen
33. ans Total scans Counts every scan good or bad in determining when to send a Frame Good scans only Counts only good scans in determining when to send a Frame If you do not include Bad Scans the Frame rate will not be uniform when Bad Scans occur In the extreme case a continuous series of Bad Scans will prevent any upload at all unless you have selected On Alarm from the Serial Trig menu On the other hand counting Bad Scans means a Frame could contain Measure values associated with a Bad Scan Of course the accompanying flags would inform you that this was Bad Scan data The Serial of Scans Menu Serial of Scans Previous XXXX Enter new Action Indicate how many scans must occur between serial output Frames This menu follow the Serial Count Type menu only if you have chosen of scans Frames will be sent every n scans Your choice at the Serial Type menu determines whether Bad Scans count toward n Enter n using the numeric keypad and press to register the value If you enter 1 a Frame will be sent for every scan If you chose a value that results in a Frame rate interval shorter than the time to send a Frame the System sends Frames with no intervening time The Serial For Measure Menu Serial For Measure n 1 Include Measure 2 Include Avg Meas 3 Remove both Action Specify which data if any you want to include in a Frame The top line of the menu will indicate which Measure you are Each o
34. as erminnnscamsarioravnceactermiebincimmentceeanen 53 Serial Upload Trig gt of Scans ianea 54 The Serial Count Type MenU ii si siscieadecinsscienctbrsscienemcisnnsinaeiibennisnauneninansicnsion 54 The Serial of Scans WOT aciscsscicsssasinesccnccanicosicenssetinonicnsasanasetanedions 54 The Serial For Measure M nu cccccccccccceecccecscecseeeseueceeeeseeeseueeeeeeseueees 54 Mam Menu gt QNE ee er ee 56 The Olhar Menu eiciia ore ae ee gee ne One eee ee eee 56 Other Menu gt Number of Cameras piisid eneidiaa 56 The Cameras M nU nosis an a a a a Eara Sa 56 Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 5 Part Introduction The purpose of this introduction is to give you an overview of the Line Scan System and the way it works You can find more information about setting up and using the System in Parts II and II of this Manual What is the Line Scan System The Line Scan System is a non contact optical measuring system designed to measure the positions of contrasting edges with high precision It can be configured to work with a large variety of applications in manufacturing and production Target size can range from microns to meters depending upon your optical arrangement With a resolution capability of one part in 5000 the Line Scan System is an invaluable tool in applications for which the tolerance for error is small It works well with web and extrusion processes and offers flaw detection and clo
35. ay Hold Menu cccccssseeeecccseeeecccesesecseaseeeeseaees 46 The Minimum Buzzer Hold M nu ccccccccceeccceeeceeseeeceeueeseeeeeeseeeeseeees 46 Main Menu gt Data oessa aaa a a a a a aiaa 47 The Data Processing Menu ai ecic anc cnneeceebl hee candtenael enccenicaneoantaremnaGans 47 Data Processing Menu gt Averaging cccsesceceeeeeeeeeecessseeeeeeeeeeeeeeeeess 47 The Running Average M Nu c c c0 000 s ccccccccccseenesssssecrsesseneonsesensennesneennen 47 FL LE 2 acne ena eg a eet re mene ener en Orne emnrer eres rent oferts er fern tae 48 The Maximize Average Menu ccccccccsseeseseseeeeeeeeeneeeeaeseeeeeeeeeeeenes 48 THe es atte MENU optiniai doian aa a EAP iEn a aa Ea Eiai 49 Uai ee a ae 2 aSeR OSE ES NE a See ee OER ee 49 The Calibration Men nin cnc ccc cncesccc acacia ce aba aaea 49 The Offset to Zero MenU cece ceecceccceeeceeceeceeueseeeseuueeueeeeeeeeueeeseesenees 50 Main Men Ol eats ie Sos aeke Gane asia sons aeie boyd a a aii aaia a aii aiei 50 The Ouiput PG ssc cicasvrcnriccucctnataninrasceasicascsaacusiteecienedensmnticranetnicensmnnadeanceeices 50 Analg and Bea 80 Deere ere a erin rene rr et Cwatt 51 The Analog Output Menu iccirco ninia anas 52 The Analog Sepse M n srren a 52 The Serial Ouiput Menu s snot nana a 53 The Serial Baud Rate MenU cccccccccceccceeccueccceeseeeseueeeeeeseenseeeeeeeeseneees 53 The Serial Upload Trig acs ccsticnc d
36. ble number of edges it is a good Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 38 scan if it fails those tests the scan is a bad scan The Line Scan System does not use Bad Scans in calculating Measure values Depending upon how you set certain parameters at the Bad Scan menus a Bad Scan may result in an alarm condition For each good scan all active Measures are calculated and the Measure values compared to High and Low Limit values where appropriate If a calculated value falls outside of a limit an alarm condition may be declared depending on how you have set parameters at the Alarm Limits menus You can configure the System with the Limits menus to generate a number of actions for different alarm conditions Primarily the System indicates alarm conditions through the relays and buzzers on the I O board s A System may have one or more I O boards and each has one buzzer and three relays K1 K2 and K3 K1 and K2 are associated with the High Limit and the Low Limit alarms respectively and K3 with a Bad Scan alarm In most cases each Measure is assigned a unique I O board so that for example a High Limit alarm violation by Measure 2 will affect only the K1 relay on the I O board configured for Measure 2 The buzzers and K3 relays however are activated in common for all I O boards in a System That means that a Bad Scan alarm will affect all K3 relays in the System and that activating the buzzer will cause
37. ducing strips of minimum length If you find the light to be inadequate to produce a scan with good contrast and increasing the amount of light is not feasible your next step is to increase the scan time to accumulate more light per scan Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 33 Since the scan time determines the charge accumulation for the pixels of the linear array you will want to adjust it to maximize the contrast of your important features given the amount of illumination available When you settle on a scan time this determines the length of a scanned band of your target Finally your target may contain Features that are too small in width to be of interest and that you want the System to ignore You can define a Rejected Width the width that a Feature must exceed before the Line Scan System considers it at all In this way you can count features and measure positions ignoring any small features that might appear between those of interest Note that the rejection of small Features applies to Flaw Detection as well and the System will fail to detect flaws that are smaller than or equal to the specified Rejected Width Camera Menu gt Scan Timing The Scan Timing Menu Scan Timing 1 Scan time 2 Delay time 3 Trigger Action Choose which of the three scan timing parameters you want to set for your camera s Scan time Leads to a menu for setting the length of time that the Camera takes to complet
38. e 9 Contact INfonmaANO N snora a aaa a a a aA A 9 Part il Hardware Setup he ee eS Br Sele Pn Slr rene seis ne re 10 Setting Up the Line Scan System srera eieae 10 Providing a Mounting System for the Camera cccccecceceeeeeeeeeeeeeeeeeeees 10 BRI E E E 10 MT NM csc atte E E 10 Control UNE mesoa aa a a a aa a a a 11 POUE E OA 11 BA AE E E E EE E E 12 The Controller Board sis isis cession coticbbimncdalsidandicnbtenctabicandbesbbewctabinceesntdl 12 The DO FM T Sando cecenctaee sans a aa aaa a aa a Aa Aia a adai 13 ae A ees icine E A 13 AE EE E E E E EE 14 Connecting a Remote I O Board ci csiccincinsnccansnisncnpanannnnnackdbaaiaanaaamiaaabanpeasan 15 Syster YMC ME IED oiii a a a i 16 Figure TO eronneen e a r oe rere ee a 16 Camera PI sione aeea eaea 16 Part Il Software Setup oo cceccececsnsdeistecstscennsstsssavccincecnsdsnsennsssmcecnccdndaesssinesteceds 18 Understanding the Keypad and Setup Menus cccceeeceeeeeeeeeeeeeeeeeeeees 18 Figure Ti eese nan rrr tr nrnern E 18 Using the cis stidicadacadidectecincdadatea ides tcecicadsdunidnainneideatdadiduitaneiaeatseasdss 18 The Pg Ss and sie t cad conigeuivcndcavhaaninanauabicssvavieatinabiccdaanieauiacnians 18 PrN es cade E 19 a and rors oaiias peice roan eee aioe 19 ThE METUS snd hepa Aa A EAE A 19 TER Te eae E OE E 20 E a T T 27 Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 3 Main Menu gt MCaSuUlre ccceccecceccece
39. e amount of integrated light required for a pixel to be considered light rather than dark Discriminators Leads to the Discriminators menu which lets you specify the size below which features will be ignored completely Scanning and the Camera Parameters The camera repeatedly scans your target translates the result of each single scan into an output pattern and processes the pattern according to your requirements This scan consists of projecting your target onto a 5000 element linear array of pixels In a typical application the target is moving at a known speed and a single scan takes in a fixed length of your target measured in the direction of motion That length is the speed times the scan time Let us call that fixed length a band of your target Let us also call the piece of the band that corresponds to one pixel a strip within the band There will be 5000 strips See Figure 15 Each pixel accumulates charge in proportion to the brightness of its corresponding section of the target When the scan is complete the 5000 array values are serially shifted through a comparator to convert each charge value to either 0 or 1 Values larger than the specified threshold value becomes Os dark and those smaller become 1s lights r STRIP Figure 15 A band of your scanned target and the strip scanned by a single pixel Generally you will want to start by setting the scan time to its minimum value pro
40. e input varies with System configuration The standard System is shipped with the Zero position of the front door switch controlling the signal See page 50 You can also choose to use the switch as a scan trigger page 35 Other uses are possible for custom applications but you must not enable it for more than one use at a time STOP RUN The STOP RUN input TB6 3 and Tb 4 is an isolated digital input for connection to an external switch Its function is the same as the door mounted Stop Run switch Closing this switch will set all relays and the buzzer to their non alarm state and undo any latching The display Alarm LED and analog outputs will still be active Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 14 Vout and lout Vout is a 0 10VDC voltage signal proportional to the Measure selected by the ID Switch and is trimmed by the offset V OFF and gain V GAIN adjustments The load impedance must be a minimum of 1K lout is a 4 20 mA signal proportional to the measurement and is trimmed by the offset I OFF and gain I GAIN adjustments The load impedance cannot exceed 500 ohms The LEDs Alive Blinks when the Control Board processor is active and communicating It is associated with the System as a whole Run Indicates that the STOP RUN signal is in the Run position It is associated with the System as a whole Alarm Indicates an alarm state This applies to any alarm regardless of its source Connecting
41. e one full scan Delay Time Leads to a menu for setting the length of time that the Camera waits to start a scan after the Trigger This time is not included in the Scan time Trigger Leads to a menu for defining the event that triggers the start of a scan Scan Timing gt Scan Time The Scan Time Menu Scan Time Edges n Value xxx x mS A Up 1 0 D Dn 1 0 B Up 0 1 C Dn 0 1 Action Set the number milliseconds that the Camera will take to complete one full scan Use the A B C and D keys to increase or decrease the number displayed in the Value field A and D move up and down by 1 0 millisecond per key press B and C move up and down by 0 1 milliseconds per key press When you have reached the value you want to set press the key The top line of this menu displays the number of edges that the System detects Since the scan time setting can affect how many edges the camera detects you will probably notice that the number of edges changes as you adjust the scan time Do not try to adjust the scan time without an oscilloscope to monitor the appearance of the scan image The allowable scan time range is 1 millisecond to 99 9 milliseconds If you find that the 99 9 millisecond maximum is not enough you will have to provide more light Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 34 Scan Timing gt Delay Time The Delay Time Menu Delay Time Value xxx x mS A Up 1 0 D Dn 1 0 B Up 0 1 C Dn 0 1
42. eceeceececaeceeceececaececeeceeaesecueaeeaeeneeneaees 27 The Select Measure MenU n01nnnen01nnnnonennnnnnrnennrrnnnnnsrnrrennrnrrrnnnnrernenneene 27 The For Measure aed csc se ctcens ze iccentsensebnd escent cseeel eh ae ee eae 28 Defining Measures sess sssiccascnsnacsicassouaisadnatibougiocahoadsanshondtousbonanaiehondsodsbabes 29 POUE crea cestoe trade cnnc ein cepa ean erento ahaa eee eenEs 29 Flaw ON eied EE aE Eei 29 The Camera lo Use Menu iss sesetcsssasendasanmndgebanoniaabisoniaibesssigebinesiaetanctiess 30 The Define Measure Men sonoriensis aneron nion inea 30 The Type of Difference Menu n0001nnnnnnnnnoeennnnnnrrnneennrnnnnntnnneennnn ennen 31 The Count Px From Menu oon icc oxesgmnsininsondtncsbaedsancboedhaebbondganohoudsenbbonduabes 31 The Px tetas cia ee ee 32 The Pele MOUN persen aE EE 32 Main Menu gt Camera scrierea aa a aaa e 33 The Camera Mant rosonoirenpiioari tnra oaar aoa aaa a aa a a iaaa 33 Scanning and the Camera Parameters cccsssseeeeeeeeeeeeeeeessseeeeeees 33 Ee LAE E a A E E E E E 33 The Scan Firing Monu ai cicssssshcacipisacatandcbiadigaianucipdibeaiiniehnadaeadanadapatasadinadie 34 The Scan Time Menu osei aS 34 The Delay Time Menu ocres aa 35 The Scan TAgOor Menu soicind ideian 35 The Threshold M n ee 36 Using the Oscilloscope to Adjust the Threshold ccccceseeeeeeees 36 Eck S E E E A E ETE 37 The Disciminators Menu isesi aai 37 The Rejected Width MenU
43. f edges the Measure for the flaw is performed and a value assigned When a flaw is detected the Measure s value is processed in the normal way displayed compared to any limit values uploaded etc according to the System settings you have chosen When no flaw is detected no High or Low Limit tests are performed For more information about Flaw Detection see page 29 and Bad Scans and Alarm Limits on page 38 See the discussion on page 48 under Averaging if you are using Averaging for a Flaw Detection Measure For Measure Menu gt Define The Camera to Use Menu Camera to Use 1 Camera 1 2 Camera 2 Action Choose which of the two cameras will be associated with the Measure This menu follows the For Measure menu only if you are using a multiple camera System The Define Measure Menu Define Measure n 1 Position P 2 Diff P2 P1 3 Midpt P2 P1 2 Action Choose which of three types describes the currently selected Measure Position Calculates the location of a position P on your target relative to the beginning of the scan image Diff Calculates the distance between two positions P2 minus P1 You must select the two positions so that P2 minus P1 is not negative Midpt Calculates the location of the midpoint between two positions half the sum of P2 and P1 Later when you are specifying the details of your Measure definition you will see that it is possible for P1 and or P2 to also be midpoints of a Feature
44. f the three choices is working with This will be the one you have chosen in the Select a toggle to the left of a Measure menu which appears immediately before each occurrence Choice indicates that it is of the Serial For Measure menu on indicates off Include Measure Includes the last scan value of the Measure When Setan made es in thecutout Frame your selections press to P register the choices and return to the Select Measure menu If the last Measure you chose is not the one you want to display follow the directions on page 22 Line Scan System User s Manual IM1021 V3 01 April 19 2004 Include Avg Meas Includes the average of the Measure in the output Frame Remove both Removes any data for this Measure from the output Frame When you have finished making your choices for a Measure press to return to the For Measure menu where you can either choose another Measure or press to return to the Output menu You can select values for inclusion in the upload in any order you would like but the actual order in a Frame begins with Measure 1 then 2 etc In addition the average value always follows the single scan value if you have chosen to include both Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 55 Main Menu gt Other The Other Menu Other 1 Number of cameras 2 Reserved Action Select an option to set Number of cameras Lead to a menu allowing you to select one or two c
45. fline A table is a Connect oscilloscope Channel to the camera video helpful along with a light source output BNC V that is uniform across the field b Connect the external trigger of the scope to the Sync BNC Of view of the camera You can S mount the Line Scan System in c Set Channel 1 Volts Div to 1 V cm its final location later after you d Set Time Div to 0 1 mS have become familiar with the e Set Trigger Source to External POS slope System s operation Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 16 f Set Trigger to Auto g Adjust the trace position until it is on the center graticule line 2 Connect the 115VAC power to the Control Unit and the Control Unit to the camera as indicated above Open the front cover of the Control Unit 3 Place the camera so that its distance from your light source equals the specified working distance on the calibration sheet you received with the System The V and The contents of the 5000 S BNCs on the end of the camera line up with the ends of the array inside the pixels of the linear array camera Use these as position markers when you rotate the camera tube until the are shifted out at a rate array lines up with your light of 7 4 mHz meaning the entire array is shifted out 4 Turn the Control Unit on using S1 on the Controller Board inside the Control in 680 msec Unit The output from the camera should now appear on the oscilloscope A voltage of about 3V
46. fter Basic width width y set Basic Width to 2 before they will be recognized Extra light width to y and Extra light width Specifies an additional constraint on light Extra dark width to Zero features applied in software after Basic width before they will be recognized The three possible minimum width specifications interact with one another The Basic width test occurs first in the hardware making it faster than the other two which are done in software Try to use the Basic width discriminator if you can to minimize the number of edges passed to the software The System has a software limit of 16 edges Edges eliminated using Basic width do not count toward the 16 but those eliminated using Extra dark width or Extra light width do Note that you must enter all Discriminator widths in pixels even if you are using scaled units Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 37 After Basic width eliminates any features under its minimum the remaining Features are checked against the Extra dark width and the Extra light width If you set Extra Dark Width or Extra light width to be smaller than Basic width they will have no effect If you try to set Basic width to something smaller than 2 the System will ignore your value and set it to 2 One use of the discriminator is to clean up an edge of a feature whose structure causes multiple edges where there should be only one See page 36 for a full discussion
47. h signals are available on BCD connectors on the camera See Using the Oscilloscope to Adjust the Threshold below The best threshold voltage setting would be midway between the lowest of the high features and the highest of the low features to minimize the chance that a fluctuation in a feature level would create an unwanted new feature The top line of this menu displays the number of edges that the System detects This number must match the number of edges that the scope trace indicates should be present If the number of edges displayed on the menu exceeds the number on the scope trace it is likely that the edges are not smooth Expanding the scope trace at an edge will probably show that the edge actually crosses the threshold line several times This problem usually results from the method of target illumination and or some optical light or dark structure on the target at the edge of the feature Multiple crossings at an edge are not acceptable and you will have to eliminate them If changing the lighting does not solve the problem you can use the Discriminator function although that will cause some loss in positional accuracy See page 37 Using the Oscilloscope to Adjust the Threshold To adjust the threshold value using the oscilloscope 1 Connect Ch1 of the scope to the BNC on the back of the Camera labeled V for Video 2 Connect Ch2 to the Camera BNC labeled T for Threshold 3 Connect the external trigger of the scope to the Camera BNC
48. ic number of scans over which an individual value remains a meaningful part of the average This is explained in more detail below under Averaging You can use the averaged value for display and for determining Limit violations serial upload and Analog output Averaging applies only to the specific measure for which you set it An averaged value in a limit test works well only if it does not during the beginning of the Averaging process vary significantly from its stable value To prevent unnecessary change in the average value the System seeds the average value with the first measured value In other words the average value starts out as the first value measured If subsequent values are close to the first value the average value will converge on its stable value without large variations Without this seeding the early calculated averages would be artificially low as you can see by looking at the formulas below Several conditions will cause reseeding of the average value The Stop switch on the Control Unit or Stop signal will reseed the average value when the Stop is released If a Bad Scan alarm occurs and the value is forced to zero the first good scan will trigger reseeding of the average value For Measures associated with Flaw Detection the average is reseeded each time the flaw first appears that is when the edge count increases to the point that the System calculates the flaw Measure Line Scan System User s Manual IM1021
49. imit is active status is blank in normal conditions but may contain Alarm if an alarm has been triggered or Stop if the Run Stop switch is in the Stop position mE represents the lights and darks of the current scan Darks appear as W and lights as O blanks This screen is visible whenever the System is running and you are not using the menus Press any key on the keypad to cause the Main Menu to appear The Main Menu leads to all the other menus in the System Mn XXXX UUUUUU xx Edges xxxxxxx Hi status xxxxxxx Lo TIT TTT Titi iii yyy Figure 11 The Running Screen visible on the LCD of the Control Unit whenever the System is running and you are not using the menus Using the Keypad The keypad contains a set of standard telephone dial push buttons together with four buttons labeled A B C and D along the right side of the pad Press the numerical key that corresponds to the menu item you want to choose Enter numbers of more than one digit by pressing the digits followed by The A B C and D Keys The A B C and D keys on the right side of the keypad have special functions at the menus and those functions depend upon the kind of input you are making Each menu displays a reminder of the way the keys work for that particular menu Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 18 Some menus ask you to adjust numerical values up or down by fixed amounts For example the Threshold menu requires a
50. labeled S for Sync 4 Set both the Ch1 and the Ch2 inputs on the scope to GND 5 Set both VOLTS DIV switches to 1 V Div 6 Rotate both position controls so that Chl and Ch2 are positioned on the center graticule line overlapping each other sa Set both the Chl and Ch2 inputs on the scope to the DC position 8 Adjust the threshold at the Threshold menu using the A B C and D keys Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 36 M2005 chi chi 1 V 1 62 Y Figure 16 Oscilloscope trace showing five Features and the Threshold value horizontal line Camera Menu gt Discriminators The Discriminators Menu Discriminators 1 Basic width 2 Extra dark width 3 Extra light width Action Begin the process of specifying the minimum width s for features to be recognized by the System Each of these choices leads to another menu at which you set the actual values Basic width Specifies a minimum width in pixels for a Ti Feature to be recognized at all Any light or P dark feature narrower than this width is To ignore light features of width x and dark features of width 2x set Basic width to x Extra dark width to 2x and Extra light width to zero ignored Testing for this width occurs at the hardware level and does not contribute to the edge count Extra dark width Specifies an additional constraint on dark RN EE To ignore only light features of features applied in software a
51. lecting any growth of the Feature If you set n to 0 in the Running Average menu the Average Value will become equal to the largest value encountered If you set it to be larger than 0 the value of average will approach the maximum value of the measurement from below Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 48 Data Processing Menu gt Scaling The Scaling Menu Scaling 1 Pixels 2 Scaled Action Select the unit system for displaying Measures The scaling you choose here applies to all your Measures Warning Pixels Displays all measures in pixels that is as a value between 1 Choosing Scaled and 5000 zeroes any existing offset Scaled Leads to the Calibration menu to set up custom units Units The Line Scan System makes all measurements in pixels Position values range from 0 to 5000 in the 5000 pixel linear array If you prefer you can select a scaling factor to permit displayed values and your numerical input at menus to use custom scaled units You define these units by scanning a Standard a target containing a feature of known size This process defines the value of a Measure for that Standard and calibrates your units Choose Scaled and you will be prompted to use the Line Scan System to scan the Standard and use its size to create scaled units for all your Measures The LCD of the Controller Board will read Scaled instead of Pixels to remind you that you are using scaled units The Calibra
52. n Specify whether you will use Averaging in determining the voltage or current produced by the I O Board for the selected Measure For more information on Averaging see page 48 The Analog Sense Menu Analog Sense 1 Positive 2 Negative Action Choose a direct or inverse relationship between the change in the analog output and the change in the value of the selected Measure Positive Positive change in the value of a Measure produces a positive change in the analog output and negative Measure change produces a negative output change Negative Positive change in the value of a Measure produces a negative change in the analog output and negative Measure change produces a positive output change See page 13 for information about using the Gain and Offset adjustments on the I O board s Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 52 Output Menu gt Serial The Serial Output Menu Serial Output 1 On 2 Of f Action Specify if data is or is not to be sent to the serial output on the COMM port of the Controller Board On Choose this to enable serial output Off Choose this to disable serial output and return to the Output menu If you choose On you will have an opportunity to specify which information is sent and the conditions that trigger the sending The Serial Baud Rate Menu Serial Baud Rate 1 1200 4 38 400 2 2400 5 115 200 3 9600 6 230 400 Action Choose the baud rate for the C
53. n to step 1 and repeat the entire process until you are satisfied with the results 5 When you are through tighten the two rear plate set screws on the camera Install the front cover onto the camera and rotate the cover to a position that maintains the proper trace Tighten the front plate set screws Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 17 Part Ill Software Setup Understanding the Keypad and Setup Menus Setting up your Line Scan System involves specifying a variety of parameters and options to optimize the System s performance for your environment The range of options is large making the Line Scan System extremely flexible You make all settings and choices that govern the Controller Board from a series of menus displayed on an LCD inside the Control Unit Use the keypad on the Controller Board to make your choices When you turn the Control Unit on the Running Screen shown in Figure 9 appears in the Unit s LCD window It displays the current Measure its value your High and Low Limits if the limits are active the number of edges detected the System status and a bar representing the current scan Mn is M1 M2 M3 or M4 representing the currently displayed Measure XXXX is the current value of the Measure uuuuuu is Pixels or Scaled xx Edges shows the number of edges the last scan detected XXXXXXX Hi shows the High Limit only if the limit is active XXXXXXX Lo shows the Low Limit only if the l
54. number in the range 0 to 100 The menu displays the current value and you can use the A and B keys to raise it by 10 and 1 respectively and the D and C keys to lower it by these amounts Threshold Edges nn Value Xxx A Up 10 D Dn 10 B Up 1 C Dn 1 Figure 12 The Threshold menus illustrating the use of the A B C and D keys to increase it decrease a numerical value Some menus ask you to key in a numerical value At these menus enter a decimal point by pressing the D key For example to enter 69 85 you would press this sequence of keys 69D85 Note that this is the D key from the right side of the pad not D on the 3 key To enter a negative number use the C key as a minus sign For example to enter 525 89 you would press this sequence of keys C525D89 The and Keys Two keys in the bottom row of the keypad have special functions The key functions as Enter It moves forward in the menu hierarchy and saves the setting from the current menu in EEPROM Press after any keyed in input other than single digit menu choices At any menu with an existing numerical value or previously selected menu choice indicated by to its left pressing will retain that selection and move on to the next menu Some menu choices are toggles A or to the left of these choices indicates that they are on or off When you select them you simply toggle the value but do not leave the menu Press to move on to the next men
55. on of specific edges counted from BEG or END Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 39 This is true even if you enable Flaw detection You must define your Measures very carefully taking into account the possible appearance of additional edges An example of Flaw Detection based on the first situation above Suppose you want to measure the diameter of a hole in a strip of material and sound an alarm if its width exceeds a set value When the hole is present there will be two new edges You could chose to measure the hole width by defining a Measure based on the distance between the third edge from the left and the third edge from the right See Figure 13 Measures associated with Flaw Detection are set to zero when the additional edges are not present and they are not compared to the High or Low Limits As a result Measures associated with Flaw Detection cannot create alarms unless a flaw is present Defining the hole Measure based on counts from the left and the right means that if two holes appear in the same scan the measured width is the distance from the left edge of the left hole to the right edge of the right hole If the two edges that define the hole Measure had both been counted from the same side two holes in the same scan would have resulted in measuring the diameter of one of the holes and ignoring the diameter of the other Notice that Flaw Detection does not interfere with the measurement of the width of the
56. or that you use Features as defined in Figure 13 as reference points If you were to connect an oscilloscope to the VIDEO 1 test point on the controller board and look at a single scan you would see a line display with a series of step transitions from light to dark and dark to light These step transitions are called edges Each pair of edges makes up a Feature Note that the right edge of a feature is the left edge of the adjacent feature For describing locations of Feature edges think of the image that the Line Scan System makes of a target as a series of dark pixels and light pixels as symbolized in Figure 13 The fixed point called Beginning BEG is at the left end of the image and the fixed point called End END is at the right end of the image Counting from the left or BEG the Features are called Bx The first feature counted from BEG is B1 the second B2 etc The Features can also be counted from the right or END and are called Ex with the first one counted from the end called E1 In this example which contains seven features counting BEG and END B1 can also be called E5 B2 can also be called E4 etc Please note that in this diagram light is down and dark is up Figure 13 represents a set of features that might result from two objects blocking an illuminated field of view B1 is an example of a light feature and B4 is an example of a dark feature Each Feature has a left edge a right edge and a midpoint half way between the left
57. pt The series appears for each point you are using Choices will read END E1 E2 E3 E4 and E5 if you have chosen END from the Count Px From menu Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 20 Scan timing Threshold Discriminators Scan Time Edges n Value Xxx x mS A Up 1 0 D Dn 1 0 B Up 0 1 C Dn 0 1 unning edge trig g edge trig Threshold Edges nn Value Xxx A Up 10 C Dn 10 B Up 1 D Dn 1 camera 1 Scan timing 2 Threshold 3 Discriminators Discriminators Basic width Extra dark width E S Extra light width 1 2 3 ccccc will be Dark Light or Rejected Width ccccc Basic depending upon your Previous XXX choice at the Discriminators Enter new menu Must be in pixels Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 21 LAHLF 2AHLF 3AHLF 4AHLF cece Limit Value Previous XXX XXX Enter new Limit Average se average use average Latching d buzzer Line Scan System User s Manual See page xxx for Limits gt Bad scans choice and Duration D key deci mal pt cccc is High or Low depending upon the limit you have chosen Kn is K1 for High Limit and K2 for Low Limit no choice 3 if you are working with Measure 1 IM1021 V3 01 April 19 2004 Li 1 2 3 its Alarm limits Bad scans Duration Limits 1 Alarm limits 2 Bad scans 3 Dura
58. rd before the System issues a Bad Scan alarm The allowed range is 0 to 9999 A single good scan resets the count to zero The Bad Scan Output Menu Bad Scan Output 1 Force to zero 2 Freeze Action Decide if the measured value that is displayed sent to the serial output and or sent to the analog output will be forced to zero when a Bad Scan alarm occurs Force to zero Forces the output to zero or to the negative of any offset Freeze Freezes the output at the last good value If you choose Force to zero and have an offset in place see page 50 the value will be forced to the negative of that offset value Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 41 If you choose Freeze the value will be left frozen at the last good value A good scan releases the restriction on the output and if the value was forced to zero the average value will be reseeded See Averaging on page 48 The Bad Scan K3 Relay Menu Bad Scan K3 Relay 1 K3 on gt limit 2 K3 off gt limit 3 Don t use K3 Action Determine what will happen to all K3 relays when the System detects more Bad Scans than your allowed limit K3 on gt limit Turns the K3 relays on when a Bad Scan alarm occurs K3 off gt limit Turns the K3 relays off when a Bad Scan alarm occurs Don t use K3 Disables use of the K3 relays regardless of the number of consecutive Bad Scans The Bad Scan Buzzer Menu Bad Scan Buzzer 1 Sound buzzer 2
59. represents no light dark level and the voltage decreases as the light increases It never reaches OV even when there is enough light to saturate the detector The voltage between scans will be at the dark level There is some variation in the dark voltage and the saturated voltage between cameras If the trace appears as a flat line at about 3 V and does not vary from that line the array is receiving no light for one of several possible reasons The most likely reason is that the array is in a position that prevents light from falling on it If you have this problem you can try this 1 Adjust the direction in which the camera is pointing until you see evidence of light on the trace 2 Rotate the camera until the lighting is as uniform as possible across the whole scan 680 uS as viewed on the oscilloscope The lighting should be uniform assuming you are performing this setup with a uniform light source and no target If you are using a target the trace should depict the lights and darks of your target 3 Ifrotating the camera has left it in an awkward orientation you might want to rotate the linear array within the camera allowing you to return the camera to its original orientation To do that loosen but do not remove the two rear plate set screws on the back of the camera Rotate the black rear plate to obtain the proper light trace 4 Rotating the camera and array might undo the direction adjustments of step 1 If that happens retur
60. rm based on an averaged value of a number of scans or the single value of the last scan If you do use Averaging specify the number of scans to be averaged by selecting Data from the Main Menu then Averaging from the resulting Data Processing menu Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 44 The High Limit Relay and Low Limit Relay Menus High Limit Relay K1 mit Relay K2 1 On when gt limit when gt limit 2 0n when lt limit when lt limit 3 OR with Measure 1 with Measure 1 Action Determine what will happen to the limit specific relay when a limit alarm is triggered On when gt limit Turns the relay on for values above the High or Low Limit On when lt limit Turns the relay on for values below the High or Low Limit OR with Measure 1 Enables an alarm to affect the Measure 1 relay as well as the limit related relay This choice does not appear if you are working with Measure 1 On each I O board relay 1 K1 is for the High Limit and relay 2 K2 is for the Low Limit If you have more than one Measure you might have more than one I O board with each Measure assigned to a unique board That gives each Measure its own K1 and K2 relays The first two choices on this menu allow you to control whether or not a relay is on in an alarm state For example a fail safe installation might require that the relay be on energized when it is not in an alarm state You might want to have more than one
61. roportional to one of the Measurements and export values and limit flags via an asynchronous serial output See Part III Software Setup for further discussion Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 8 Using the Line Scan System There are two stages involved in using the Line Scan System Hardware Setup First you must create the optical interface between the System and your target This interface will enable the scan of your target to cover the area in a meaningful and efficient way You will also need to tie the Line Scan into your larger control system See Part II Hardware Setup for details Software Setup After you have set up the hardware you must specify the parameters that the Line Scan System will use These parameters allow you to customize the System thoroughly to produce the results you need For full instructions see Part III Software Setup Contact Information Technical support and service is available Monday through Friday from 9 00 a m to 4 30 p m Eastern Time at Phone 203 878 9540 Fax 203 878 9628 email mail divop com Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 9 Part Il Hardware Setup This section covers physical connections along with setting up the lenses lights and any other necessary equipment See Part III Software Setup for information about choosing the System parameters that govern collection and handling of your data Setting Up the Line
62. s J5 3 RS 232 Tx J5 4 RS 422 Tx Z J5 5 RS 422 Tx Y J5 8 Signal ground Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 12 J6 Connector for external RS422 communications J6 Connector on the Controller Board Customer connections for RS 422 STOP and AUX signals J6 1 12 volts J6 3 AUX Normally pulled up to 5v by 10K resistor J6 4 RS 422 Tx Z J6 5 RS 422 Tx Y J6 6 STOP RUN Normally pulled up to 5v by 10K resistor J6 8 Signal ground The I O Board If the internal buzzer is sufficient for your use the Line Scan System can function as a self contained monitoring device You can also tie it into a larger system using the relays and analog inputs of the I O boards to control external processes The standard configuration for the line Scan System includes a single I O Board providing three relay outputs and 0 10V 4 20 mA analog output for the Measure selected by the ID Switch You will need an additional remote I O Board for each additional Measure you want to monitor with a maximum of four I O Boards per System LINESCAN REMOTE 1 0 o e cams 170 3 450 MOUNTING HOLES ACCESSIBLE WITH COVER REMOVED 6675 lt 1 2 CONDUIT KNOCKOUT e 2375 REMOTE 1 0 DIMENSIONAL DRAWING MOUNTING DETAIL
63. s the header will specify which position you are working with each time for example P1 on Feature The Px Is Menu Px Is 1 Left edge 2 Midpoint 3 Right edge Action Specify whether a position is a left edge right edge or midpoint between two edges on the Feature you specified at the Px on Feature menu See Figure 14 Left edge Sets your position to the left edge of the Feature Midpoint Sets your position to the midpoint of the Feature Right edge Sets your position is the right edge of the Feature Note that Midpoint refers to the position that is the center of the selected Feature This is different from the Midpt of the Define Measure menu on page 30 That refers to a position midway between points P1 and P2 either of which could itself be a Midpoint MIDPOINT LEFT RIGHT BEG N VA END Figure 14 The left edge right edge and midpoint of a Feature Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 32 Main Menu gt Camera The Camera Menu Camera 1 Scan timing 2 Threshold 3 Discriminators Action Choose which of three groups of parameters governing camera performance and data interpretation you would like to set Each choice leads to a new menu or set of menus If you are using two cameras any settings you make will apply to both Scan timing Leads to the Scan Timing menu which lets you choose the period for a complete scan Threshold Leads to the Threshold menu which lets you select th
64. se or decrease the time The A and D keys move up and down by 1 second at a time the B and C keys to move up and down by 0 1 second at a time The allowable time range is 0 1 to 25 5 seconds Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 46 Main Menu gt Data The Data Processing Menu Data Processing 1 Averaging 2 Scaling 3 Set zero point Action Set up the parameters governing the handling of data from scans Averaging Leads to series of menus for setting parameters If you do not want to determining the averaged value of a selected display the last Measure for which you have Measure i select Averaging follow Scaling Leads to a series of menus for setting the scaling the directions on page for Measures See page 49 22 after specifying all your Averaging data Set zero point Leads to a menu for recalibrating measurements See page 50 If you choose Averaging the Select Measure menu will appear allowing you to select the Measure for which you want to set Averaging The Running Average menu follows at which you can set the specifics Data Processing Menu gt Averaging The Running Average Menu Running Average Number scans XXXX B Up 1 C Dn 1 By powers of 2 Action Choose an integer n to be used in the Averaging formula described below Use the B key to increase n by 1 and the C key to decrease it by 1 As you enter n the menu displays the value of 2 which is the characterist
65. sed loop proportional control Some of the applications for which Line Scan is most suitable are detection and control of widths or diameters monitoring the position of features scanning for holes or other flaws Of course these are not the only applications for the Line Scan System Any manufacturing or production process that meets these criteria would be an excellent candidate for the System has either features or potential flaws with edges that can be identified by two tone contrast does not require two dimensional pattern recognition requires accuracy in placement of features The basic Line Scan System consists of a single camera and a Control Unit that contains a Controller Board a Display Board and an I O Board but you can add to this configuration to meet your specific needs A common need might be for a second camera to increase the size of the target covered The width that a single camera can handle depends upon how you set your System up Two cameras would allow for full scanning of double the width covered by one or of a much larger width in which you wanted to ignore the center and consider only the edges See Figure 1 and Figure 2 TARGET SURFACE Figure 1 A single camera covering the full width of your target The arrows show the direction of motion of the target Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 6 TARGET SURFACE wide Figure 2 Two c
66. st use this and the Required Edge Count menu to anticipate this problem and eliminate it Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 40 The Required Edge Count Menu Required Edge Count 1 Mi nCnt 2 Mi nCnt MinCnt 2 3 gt Mi nCnt Action Indicate which scans containing at least MinCnt edges will count as good scans MinCnt refers to the number you have specified at the Minimum Edge Count menu as a minimum number of edges for a scan to count as good MinCnt Only scans with exactly the minimum number of edges and no more will count as good scans Do The upper limit on the number of edges is 16 Any not choose this if Flaw Detection is active since any scan with a flaw would have extra edges and be treated as a Bad Scan scan withimore than 16 edges is MinCnt MinCnt 2 Only scans with either exactly MinCnt or treated as bad MinCnt plus 2 edges will count as good scans unconditionally This is a typical choice for Flaw Detection when the expected flaw has only two edges gt MinCnt Any scan with at least MinCnt edges will count as good This is a typical choice when more than two additional edges can appear You must define your Measures so that the additional edges do not change the meaning of the Measure The Allowed Bad Scans Menu Allowed Bad Scans Previous XXXX Enter new __ Trigger K3 amp Buzzer Action Specify how many consecutive Bad Scans you want to disca
67. t have been stored improperly or exposed to the elements User s Manual No part of this Manual may be reproduced transmitted transcribed stored in a retrieval system or translated into any other language in whole or in part in any form or by any means whether it be electronic mechanical magnetic optical manual or otherwise without prior written consent of DOC with the following exception a reasonable number of printed copies may be made for and only for internal use by customer DOC believes the information in this Manual to be correct at the time of publication DOC reserves the right to make changes and updates without guaranteeing any notification to the customer For Customer Service Technical support and service is available Monday through Friday from 9 00 a m to 4 30 p m Eastern Time at Phone 203 878 9540 Fax 203 878 9628 email mail divop com All materials copyright 2000 2004 Diversified Optronix Corp All rights reserved Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 2 Table of Contents Part l tg c hOM nee ee ee ee 6 What is the Line Scan System occ cecscatssssedeiacasudatedeaadecrcensdetedasadadnciaadadedeaudanndices 6 eee ee ee 6 BN E E E E arc babi ides ea uaa aod E E T How Does the Line Scan System Wotk cccccceeessseeeeeeeeeeeeeeessseeeeeeeeeeeees 7 E S eee ere nee ane erey 8 le ee eet ene ee canner on eee eet reer eer ce ree 8 Using the Line Scan System oeei
68. tion m We Minimum Edge Count Minimum Relay Hold Value xx Value X XxXx sec Up 2 C Dn 2 A Up 0 1 D Dn 0 1 Up 01 C Dn 01 ed Edge Count Minimum Buzzer Hold t Value xx x sec a nen A Up 1 0 D Dn 1 0 B Up 0 1 C Dn 0 1 Allowed Bad Scans Previous XXXX Enter new Trigger K3 amp Buzz Scan Output orce to zero Scan Buzzer Sound buzzer Don t use buzzer Latching latch Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 23 Running Average Number scans Xxxx B Up 1 C Dn 1 By powers of 2 Calibration Current Standard Must scan standard D ata Processing 1 Averaging 2 Scaling 3 Set zero point to Zero ero output nable Zero sw Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 24 Measure lAHLFOs Measure 2AHLFOs Measure 3AHLFOs Measure 4AHLFOs e average use average ount Type Appears only if choice was scans ofscans gt gt gt scans only Serial of Scans Appears only if choice was Previous XXXX of Scans gt 99 Enter new Measure lAHLFOs Exit this pair of menus only E after you have chosen all the Measures for the serial Megeut ee AHS output Frame gt gt gt For Measure n lude Measure lude Avg Meas ove both Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 25 1 Number of cameras eras Restarts One camera Two Separate Two Combi ned
69. tion Menu Calibration Current Standard 2272277 Must scan standard Action Scan a Standard and enter the value representing its size First make sure that the Line Scan System is actively scanning your Standard and that you have a stable Measure value for the standard Then type the known value for this measure using the number keys and the D key for the decimal point You can enter the value in any units you like as long as the maximum value you expect the Line Scan System to encounter can be displayed in a six place display including one place for the decimal point if you need one The Select Measure menu will follow to let you choose the Measure to which the Standard value applies Reaching this menu zeroes any existing offset In entering your value keep in mind that the form you use is important since it fixes the location of the decimal point For example suppose your expected If you do not want to range of Measures is 0 to 55 but you are using a Standard Measure whose display the last value is 2 5 to set the calibration You would type the value as Measure you have 02D500 selected for Custom units follow the directions on page 22 after calibrating all your custom units representing 02 500 That will allow room to the left of the decimal point for two digits If you entered 2D5000 a Measure of 10 would overflow the display Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 49 Dat
70. tivate limit 2 De activate limit 2 De activate limit Action Choose whether you want to activate a limit or deactivate an existing limit The header will read High or Low depending upon which limits you are working with Activate limit Leads to a menu for specifying details of the limit De activate limit Deactivates the limit for the current Measure and returns to the Alarm Limits menu The High Limit Value and Low Limit Value Menus High Limit Value Low Limit Value Previous XXX Xxx Previous XXX Xxx Enter new Enter new hint hint Action Specify the value that will act as an upper High or lower Low limit for your Measurement Enter the value in the current system of units If your number requires a decimal point press the D key on the side of the keypad to input the point For example the key sequence to produce 525 8 is 525D8 To enter a negative number use the C key to represent the minus sign You may enter a decimal point only if Scaled is on and a negative number only if Offset is on The hint field on your menu screen will remind you about using D for decimal and C for minus if the units and scaling you are using allow them Otherwise the hint field will be blank The High Limit Average and Low Limit Average Menus High Limit Average Low Limit Average 1 Use average 1 Use average 2 Don t use average 2 Don t use average Action Decide whether you want to trigger a limit ala
71. to remain triggered If you choose High limit or Low limit the Select Measure menu will appear next Choose the Measure you want to work with This will become the displayed Measure You must set independent limits for each Measure that is to have Limits The High Limit Active or Low Limit Active menu will then follow See page 44 If you choose Hysteresis the Hysteresis menu will appear next since any value you select will apply to all your active Measures Alarm Limits Menu gt Hysteresis The Hysteresis Menu Hysteresis Value Previous XXX XXX Enter new D key decimal pt Action Indicate how far a Measure must back away from the level that set an alarm before the alarm is cancelled Enter the value in the same units you have used for your limits For example if you have set a High Limit for a Measure of 4000 pixels and the 4000 level were reached a Hysteresis value of 200 would cause the Line Scan System to maintain the resulting alarm until the Measure fell below 3800 Note that a single hysteresis value applies to all your Measures and their High and Low Limits In the case of a Low Limit the Hysteresis value determines how far a Measure must rise above the Low Limit to cancel an alarm Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 43 Alarm Limits Menu gt High Limit and Low Limit The High Limit Active and Low Limit Active Menus High Limit Active Low Limit Active 1 Activate limit 1 Ac
72. ts For any given light level the scan time must fall within a relatively small range Times that are too short will result in insufficient charge accumulation to reach the threshold and times that are too long saturate the array Saturation causes blooming in which excess charge spills over into adjacent pixels affecting the System s ability to measure the position of the Edge correctly For targets in motion such as in a continuous web application you should also consider how much the target moves during a scan when you select a scan time Your choices of scan time optical interface and the speed at which the target moves determine the length covered per scan That length is a band of your target See Figure 3 After you have set up the optics a single pixel in the linear array will when projected onto your target cover a fixed size piece of the target For a full scan each pixel in the array will cover a strip as wide as the projected pixel and equal in height to the scanned band See Figure 4 That means a single scan actually involves integrating the light data from the entire strip into one pixel This is true for all 5000 pixels in the linear array The size of an individual pixel is fixed at seven micrometers by seven micrometers but the lens between the array and the target determines the projected pixel size for measuring purposes Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 7 Figure
73. u The key functions as Back Press it to back up to the previous menu level It cancels any input from the current menu before returning If you have partially completed a sequence of menus cancels only the current menu not the rest of the sequence The Menus The menus appear on the LCD of the Control Unit When the Running Screen is visible press any key for the Main Menu The Main Menu contains six choices and you can select them in any order Each of the six choices leads to a series of follow on menus Reaching the end of any menu series takes you back either to the menu from which you began the series or to some other menu level that makes sense in the given situation Pressing the key backs up one menu level If you press multiple times you will continue backing up to the Main Menu and then to the Running screen Line Scan System User s Manual IM1021 V3 01 April 19 2004 Page 19 The Menu Tree This outline gives you an overview of the menu tree structure Measure lAHLFOs Measure 2AHLFOs Measure 3AHLFOs Measure 4AHLFOs E E Choosing Flaw Detect Display 4 Of f average or Off does not lead to aw Detect splay average another menu Press to return to the Main Menu The Camera to Use menu appears only if you are using two cameras The Type of Difference menu appears only if you have chosen Diff The next three menus appear for all choices Position Diff or Mid
74. y that would affect the edge count and cause an incorrect Measure value calculation The main reason for identifying a scan as bad is to prevent use of such a scan in calculating Measure values For many applications it is a good idea to set up the System so that all scans not containing a specific number of edges are ignored as Bad Scans There are two exceptions to this rule 1 Applications with a non constant number of edges whose additional edges do not affect Measure calculation This means that the extra edges appear only in locations that do not affect identification of the edges used for calculating Measures An example would be measurement of the width of a strip of opaque material lit from behind that may have occasional holes in the middle of the strip If the field of view includes the backlight there will be two light features one on either side of the strip If the width Measure is defined by locating the left edge of the strip counting edges from the left and locating the right edge of the strip counting edges from the right additional edges in the middle would not interfere with the Measure calculation 2 Flaw Detection Flaw Detection assumes that a flaw will produce at least two additional edges that are not present normally Flaws resulting in fewer edges than normal are undetectable as flaws with this version of the Line Scan software Measures including those defined to measure properties of a flaw are defined by identificati

Series 200 Line Scan Measurement System User`s Manual

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