36712621 - heidenhain
Contents
1. 272 0 5 269 0 2 193 0 2 HEIDENHAIN DR JOHANNES HEIDENHAIN GmbH Dr Johannes Heidenhain Straf e 5 83301 Traunreut Germany 49 8669 31 0 FAX 49 86 69 50 61 e mail info heidenhain de Service 1 49 86 69 31 12 72 TNC Service 49 86 69 31 1446 FAX 49 86 69 98 99 e mail service heidenhain de www heidenhain de HEIDENHAIN G B Limited 200 London Road Burgess Hill West Sussex RH15 9RD Great Britain 01444 247711 FAX 01444 870024 367 126 21 SW366 590 01 3 1 2002 F amp W Printed in Germany Subject to change without notice2. a Switching output A6 depends on SHIFT TP3 parameter P21 Input range 99 999 9999 to 99 999 9999 mm After the respective trigger point has been called the currently valid value is displayed in the Y axis You can enter a new value with the numerical keys and transfer it with the ENT key To cancel this operating mode press the SHIFT or the CLkey The second trigger point before the MIN position is programmed in parameter P17 or P18 Addkey a Input range 99 999 9999 to 99 999 9999 mm SHIFT AZ After the compensation value has been called the currently valid value is displayed in the Y axis You can enter a new value with the numerical keys and transfer it with the ENT key The compensation value is used to calculate a new erosion depth If no value is entered the displayed value is used for the calculation To cancel this operating mode press the SHIFT or the CL key the displayed value is then not used for the calculation Description of Switching Output Functions Settings in parameter P21 STANDARD After an EDM process the transistors A1 A2 A3 A4 and A6 are locked A5 is conductive START A6 Workpiece surface 0 All transistors conductive The transistors A1 A2 A3 and A4 are locked A5 and A6 are conductive transistor conductive x transistor locked A1 A2 A5 A6 switch whenever the the trigger point is traversed A3 A4 switch on
3. EDI 2 Bt M 231 genga u E E o can alm Status display SET Datum setting REF Blinking Traverse the reference points On continuously Reference points have been traversed A SHIFT function t 2 Datum 1 2 Inch Display in inches SCL Scaling factor gt ll lt Touch off Centerline ND 760 E Position Display Unit for 3 axes amp a XO o BE lt x Bob 8 0 en m 2 5 D i a Keys e Select coordinate axis e Select axis specific operating parameters 7 ag a Numerical input HOME END MIN AZ TP3 TP4 Ei 42 MIN e Select datum 1 or 2 42 e Page backward in the list of special functions Page backward in the parameter list Cancel entry Resetthe operating mode Zero the selected axis if activated with P80 Select parameter CL plus two digit number SEC e Select the special functions Probe for center line mm inch switchover Parameter entry Page forward in the list of special functions E ef b lt 2 Trigger points 1 and 2 before reaching the erosion depth Trigger point with respect to MIN position gt N Add key for the erosion depth TP4 TP3 TP4 Additional switching points defined with respect to the top of the workpiece 0 g a I lt Trigger poi
4. Signal level of outputs Status Level High U lt 32V IX 10 Low U lt 0 4V Ix 100mA tmin 2 30 ms 1 100 mA A Up 32V Pin 4 11 Specifications Housing ND 760 E Cast metal housing Dimensions W H D 281 mm 205 mm 97 5 mm Oper temperature 0 to 45 C 32 to 113 F Storage temperature 20 to 70 C 4 to 158 F Encoder inputs For encoders with 7 to 16 uApp Grating period 2 4 10 20 40 100 200 um and 12 8 mm Reference mark evaluation for distance coded and single reference marks Input frequency Max 100 kHz for 30 m 98 5 ft Weight Approx 2 3 kg 5 Ib cable length Relative humidity lt 75 annual average Display step Adjustable lt 90 in rare cases see Linear Encoders Power supply 100 Vac to 240 Vac 15 96 to 10 96 Datums 9 nonvolatile 50 Hz to 60 Hz 2 Hz _ Functions 7 switching outputs Power consumption 15W Protection IP40 as per EN 60 529 Scaling factor Probing functions MIN position display Add key for erosion depth External set to zero Specifications 43 Specifications 44 Dimensions in mm E Opening for panel mounting M Mounting surface Complete seal 193 269
5. Input range 0 to 99999 9999 mm Default setting 0 In parameter P20 you select the trigger point to be effective for output A2 trigger point defined in P17 or P18 1 User parameter Operating Parameters 31 Operating Parameters 32 P20 E1 E3 Define the functions of the switching inputs E1 E2 E3 EXT SET TO ZERO default setting The axes X Y or Z are set to zero with a switching pulse OV at inputs E1 E2 or AXIS SELECTION Depending on the condition of the switching inputs E1 and E2 the EDM axis varies E1 E2 EDM axis Low Low Z High Low Y Low High X High High Z The input E3 allows you to select the trigger point to be effective for the output A2 trigger point defined in P17 or P18 E3 Trigger point off Low P18 High P17 The axes can no longer be set to zero P21 DEF TP Define the functions of the trigger points STANDARD default setting Standard switching function switching functions TP3 and TP4 are not used TP3 4 The output A6 is assigned to switching point TP3 no longer to HOME The output A7 is assigned to switching point TP4 Both trigger points are referenced to workpiece datum 0 they can be used for example to change the generator settings 4 CODE Function as described above TP3 4 The trigger points at the outputs A3 A4 A6 and A7 are transmitted in coded form Output Code Value A3 Bit 0 2021 A4 Bit 1 2122 A6 Bit 2 222
6. line is displayed Then the function is automatically terminated The function is always effective for the currently active axis it is possible to switch the axis before the 1st position has been transferred or Exit the probing functions Working with a Scaling Factor Scaling factors enable you to increase or decrease the display values based on the actual traverse distance The display values are changed symmetrically about the datum Enter scaling factors separately for each axis in parameter P12 Parameter P11 activates and deactivates the scaling factors in all axes see Operating Parameters Example for enlarging a workpiece P12 1 3 5 P12 2 3 0 P11 ON This results in a larger workpiece as shown in the illustration at right D is the original size Q is with axis specific scaling factors MIN position display in the EDM axis In this operating mode you cannot set any datums Since the EDM axis moves up and down very rapidly during the EDM process it is difficult to read the attained erosion a a depth from the position display The ND 760 E therefore allows you to select an operating mode which displays the last position value in the EDM axis Exit the MIN position display mode SHIFT MIN Sequence of keys 9 Call the MIN position display SHIFT MIN The MIN position display is active if the leftmost decimal points light in all axes The MIN position is internally
7. signal is generated which identifies that position as a reference point scale datum machine datum When these reference marks are crossed over the ND s reference mark evaluation feature REF restores the relationship between axis slide positions and display values which you last defined by setting the datum If the linear encoders have distance coded reference marks you need to move the machine axes a maximum of only 20 mm to do this Workpiece Position encoder Scale in Distance coded linear encoder reference marks Reference marks Switch on Traversing the Reference Marks Turn on power switch located on rear panel REF in the status display starts blinking Confirm reference traverse mode REF indicator stops blinking and stays on Decimal points blink Cross over the reference marks in all axes in any sequence Each axis display becomes active when its reference mark is crossed over Crossing over the reference marks stores the most recently defined assignment of display values to axis slide positions for datum points 1 and 2 in nonvolatile memory Note that if you choose not to traverse the reference marks by clearing the dialog ENT CL with the CL key this relationship will be lost if the power is interrupted or when the unit is switched off Datum Setting i Only after crossing over the reference marks can you set new datums or activa
8. updated every 5 ms However the display is updated only approx every 30 ms in the MIN position display mode In this operating mode the two other axes indicate the final erosion depth and the distance to go with respect to the final erosion depth EDM axis X Y Z standard o Distance to go in EDM axis symbol lights Y X X gt amp Final erosion depth 7 7 8 a MIN position of EDM axis X YZ Programming the Trigger Points 1st trigger point before MIN position MIN TP 1 C a Switching output A1 Eum TMN Input range 0 to 99 999 9999 mm 1st trigger point before reaching the erosion depth TRIG PNT 1 D SHIFT EX Switching output A3 Input range 0 to 99 999 9999 mm 2nd trigger point before reaching the erosion depth TRIG PNT 2 B SHIFT 22 Switching output 4 Input range 0 to 99 999 9999 mm Additional switching point TP4 TRIG PNT 4 J B SHIFT TP4 Switching output A7 depends on parameter P21 Input range 99 999 9999 to 99 999 9999 mm Trigger point for erosion depth ER DEPTH J B SHIFT END Switching output A5 Input range 99 999 9999 to 99 999 9999 mm Start position HOME position START POS Hu Switching output A6 depends on parameter P21 Input range 99 999 9999 to 99 999 9999 mm SHIFT HOME Additional trigger point TP3
9. 4 A7 Bit 3 2328 The assignment of code values to trigger points is described in parameters P22 to P25 P22 CODE 1 Code value for trigger point TP3 Input range 0 to 15 Default setting 0 P23 CODE2 Code value for trigger point Input range 0 to 15 Default setting 0 P24 CODES3 Code value for trigger point A3 1st trigger point before erosion depth Input range 0 to 15 Default setting 0 P25 CODE 4 Code value for trigger point A4 2nd trigger point before erosion depth Input range 0 to 15 Default setting 0 Example 1st trigger point before erosion depth P24 10 Value 8 4 2 1 Binary value 1 QO 4 Q decimal value 10 Output A7 A6 A4 A3 Transistor conductive X X Transistor locked X X Definition Bits isses output transistor conductive T aus output transistor locked P30 1to P30 3 Counting direction Positive counting direction with positive direction of traverse DIRECT POS Negative counting direction with positive direction of traverse DIRECT NEG P31 1 to P31 3 Signal period of the encoder Input range 0 00000001 to 99999 9999 um Default setting 10 um P33 1to P33 3 Counting mode 0 1 2 3 4 5 6 7 8 9 0 2 4 6 8 0 5 P38 1 to P38 3 Decimal places 2 3 4 5 6 7 8 up to 8 with inch display P40 1 to P40 3 Select type of axis error compensation No axis error compensation COMP OFF Linear error compensation active multipoint error comp not a
10. 5 LIF 101 101C 0 0002 2 4 0 00001 1 5 LIP 501 501C 0 0001 1 4 0 000005 5 6 LIP 101 Single 0 00005 5 5 0 000002 2 6 Recommended only for LIP 101 0 00002 2 5 0 000001 1 6 0 00001 1 5 0 0000005 5 7 MT xx 10 Single 0 0005 5 4 0 00002 2 5 0 0002 2 4 0 00001 1 5 0 0001 1 4 0 000005 5 6 LS 303 303C 20 Single 1000 0 01 1 2 0 0005 5 4 LS 603 603C 0 005 5 3 0 0002 2 4 Parameter settings for HEIDENHAIN linear encoders with 11 pA continued Model Reference Millimeters Inches e mark Display Display amp step z step 2 s mm Zo qm e inch ga Eg ac BS n 5 OE 31 43 P33 P38 P 33 P 38 LS 106 106C 20 Single 1000 0 001 1 3 0 00005 5 5 LS 406 406C 0 0005 5 4 0 00002 2 5 LS 706 706C ST 1201 LB 302 302C 40 Single 2000 0 005 5 3 0 0002 2 4 LIDA 10x 10xC 0 002 2 3 0 0001 1 4 0 001 1 3 0 00005 5 5 0 0005 5 4 0 00002 2 5 Recommended only for LB 302 0 0002 2 4 0 000001 1 5 0 0001 1 4 0 0000005 5 6 LB 301 301C 100 Single 1000 0 005 5 3 0 0002 2 4 0 002 2 3 0 0001 1 4 0 001 1 3 0 00005 5 5 LIM 501 10240 Single 0 1 1 1 0 005 5 3 0 01 1 2 0 0005 5 4 0 05 5 2 0 002 2 3 Linear Encoders 37 lon t Axis Error Compensat ipoin Mult 38 Multipoint Axis Error Compensation at If you want to use the multipoint axis error compensati
11. ANGUAGE FI Czech LANGUAGE CS Polish LANGUAGE PL Hungarian LANGUAGE HU Portuguese LANGUAGE PT 1 User parameter Linear Encoders The display unit is designed for connection of photoelectric encoders with sinusoidal signals of 7 uApp to 16 Selecting the display step with linear encoders To select a certain display step you must define the following operating parameters Signal period P31 Counting mode P33 Decimal places P38 Example Linear encoder with a signal period of 10 um Desired display step 0 000 5 mm Signal period P31 10 Counting mode 5 Decimal places P38 4 The following tables will help you select the parameters Linear Encoders 35 Linear Encoders 36 Parameter settings for HEIDENHAIN linear encoders with 11 pA Model 5 Reference Millimeters Inches 2 mark Display Display amp step 2 2 E fa mm E 2 inch 2 SE 38 38 38 E no jaa 26 31 P 43 P33 8 P 33 P 38 CT 2 Single 0 0005 5 4 0 00002 2 5 MT xx01 0 0002 2 4 0 00001 1 5 LIP 401A 401R Single 0 0001 1 4 0 000005 5 6 0 00005 5 5 0 000002 2 6 Recommended only for LIP 401 0 00002 2 5 0 000001 1 6 0 00001 1 5 0 0000005 5 7 0 000005 5 6 0 0000002 2 7 LF 103 103C 4 Single 5000 0 001 1 3 0 00005 5 5 LF 401 401C 0 0005 5 4 0 00002 2
12. atum for the error on the axis to be corrected e g 27 mm and confirm with ENT Cc Enter the spacing of the compensation points on the axis to be corrected for example 2 um equals 1 024 mm and confirm with ENT A oog Compensation point no 1 is displayed Enter the associated compensation value e g 0 01 mm and confirm with ENT 0005 lon t Axis Error Compensat ipoin Mult 39 lon t Axis Error Compensat ipoin Mult 40 C 28 024 Enter all further compensation points If you press the minus key the number of the current compensation point will be shown in the X display Direct selection of compensation points Press the minus key together with the number two digit of the desired compensation point Conclude entry Deleting a compensation value table Select the special functions FCT or Select the parameter function FCT 42 Select the dialog for entering the code number 0 2 1 Enter the code number 105296 and confirm with ENT Select the compensation value table e g for the Z axis and delete the table DELETE Z Confirm with ENT or cancel with CL gt Conclude entry FCT Switching Inputs Switching Outputs X10 AN Danger to internal components The voltage of external electric circuits must meet the requirements for f
13. atum point after measuring the axis error and before entering the axis error into the compensation table Spacing of the compensation points The spacing of the compensation points is expressed as 2 um Enter the value of the exponent x into the compensation value table Minimum input value Maximum input value 6 2 0 064 mm 20 2 1048 576 mm 23 8388 608 mm Example 900 mm traverse and 15 compensation points results in 60 000 mm spacing between points Nearest power of two 2 8 um 65 536 mm Entry in compensation value table 16 Compensation value You enter the measured compensation value in millimeters for the displayed compensation point Compensation point 0 always has the value 0 and cannot be changed Selecting the compensation table entering an axis correction Select the special functions FCT 7 9 a SPEC pu 2 key Select the parameter function if required by repeatedly pressing the PARAMETER Select dialog for entering the code EY C number copE M confirm with ENT 00ga Enter code number 105296 and Bga89 axzs X Confirm with ENT Select axis to be corrected e g X 2 x 8 2S 0 A x ENT Enter the axis causing the error e g X screw pitch error and confirm with C DATUM X Bue SPACING X 006 27 000 IN Enter the active d
14. ctive COMP LIN Multipoint error compensation active linear error compensation not active COMP MULTI Operating Parameters 33 Operating Parameters 34 P41 1 to P41 3 Linear axis error compensation Input range um 99999 to 99999 Factory default setting 0 Example Displayed length Lg 620 000 mm Actual length as determined for example with the VM 101 from HEIDENHAIN La 619 876 mm Difference AL La Lg 124 um Compensation factor k k AL Lg 124 um 0 62 m 200 um m P43 1 to P43 3 Reference marks One reference mark SINGLE REF M Distance coded with 500 SP 500 SP Distance coded with 1000 SP 1000 SP Distance coded with 2000 SP 2000 SP Distance coded with 5000 SP 5000 SP SP signal period P44 1 to P44 3 Reference mark evaluation Evaluation REF X ON No evaluation REF X OFF P45 1to P45 3 Encoder monitoring Amplitude and frequency monitoring ALARM ON No monitoring ALARM OFF P48 1to P48 3 Activate axis display Axis display active AXIS ON Not active AXIS OFF P70 Number of datum points 2 datum points 2 DATUM PT 9 datum points 9 DATUM PT Function of the CL key Set to zero with CL CL RESET No set to zero with CL OFF P98 Conversational language 1 German LANGUAGE DE English LANGUAGE EN French LANGUAGE FR Italian LANGUAGE IT Dutch LANGUAGE NL Spanish LANGUAGE ES Danish LANGUAGE DA Swedish LANGUAGE SV Finnish L
15. ctrode reaches the programmed distance from the erosion depth the corresponding transistor is locked The transistor remains locked even if the electrode is retracted along the programmed path by the controller Trigger point for erosion depth The trigger point for the erosion depth switches the EDM generator off The electrode automatically moves up to the start position End of the EDM process As soon as the start position HOME has been reached or crossed over in the positive direction the transistor for the start position is locked depends on P21 All transistors except A5 are then locked and the initial condition is restored At this stage a new EDM process can be started Example of input for switching outputs Switching output Input Start position HOME 10 000 mm 1st trigger point before MIN position 3 000 mm 2nd trigger point before MIN position P17 or P18 0 100 mm 1st trigger point before reaching the erosion depth 2 000 mm 2nd trigger point before reaching the erosion depth 1 000 mm Trigger point for erosion depth END 20 000 mm Error Messages SIGNAL X Encoder signal is too weak e g when an encoder is contaminated ERR REF X The spacing of the reference marks as defined in P43 is not the same as the actual spacing FRQ X The input frequency for this encoder input is too high This can occur when the scale is moved too fast ERR MEMORY Checksum error Check the datum operat
16. erating parameters gt Press the SPEC FCT or CL key To exit the operating parameters gt Press the SPEC FCT or CL key List of operating parameters P00 CODE Enter code number 9 51 48 Change protected operating parameters 66 55 44 Display the software version in the X axis Display the date of release in the Y axis 10 52 96 Multipoint axis error compensation P01 Unit of measure 1 Display in millimeters MM Display in inches INCH P03 1 to P03 3 Radius diameter display 1 Display position value as radius RADIUS Display position value as diameter DIAMETER P11 Activate scaling factor 1 Active SCALING ON Not active SCALING OFF P12 1 to P12 3 Define scaling factor Enter a scaling factor separately for each axis Entry value 1 workpiece will grow Entry value 1 workpiece will remain the same size Entry value 1 workpiece will shrink Input range 0 100000 to 9 999999 Default setting 1 000000 P13 1to P13 3 Shrinkage compensation Input range um 99999 to 99999 Default setting 0 Example Input value 296 corresponds to 20 000 um m Please note If you use the shrinkage compensation in addition to the linear compensation the compensation values will superimpose each other multiplicatively P17 MIN P2 1 2nd trigger point before MIN position switching output A2 Input range 0 to 99999 9999 mm Default setting 0 P 18 MIN P2 2 2nd trigger point for output A2
17. ers Your display unit will accept all HEIDENHAIN linear encoders with sinusoidal output signals 7 to 16 and distance coded or single reference marks Assignment of the encoder inputs Encoder input X1 is for the X axis Encoder input X2 is for the Y axis Encoder input X3 is for the Z axis Encoder monitoring system Your display unit features a monitoring system for checking the amplitude and frequency of the encoder signals If it detects a faulty signal one of the following error messages will be generated SIGNAL X FRO X Encoder monitoring can be activated with parameter P45 If you are using linear encoders with distance coded reference marks the encoder monitoring system also checks whether the spacing of the reference marks as defined in parameter P43 is the same as the actual spacing on the scales If it is not the following error message will be generated ERR REF X Connecting the Encoders Operating Parameters 30 Operating Parameters Operating parameters allow you to modify the operating characteristics of your display unit and define the evaluation of the encoder signals Operating parameters that can be changed by the user are called user parameters and can be accessed with the SPEC key and the dialog PARA METER user parameters are identified as such in the parameter list The full range of parameters can only be acce
18. in the positive direction and anegative sign when it is moved in the negative direction Nominal position actual position and distance to go The position to which the tool is to move is called the nominal position The position at which the tool is actually located at any given moment is called the actual position D The distance from the nominal position to the actual position is called the distance to go Sign for distance to go When you are using the distance to go display the nominal position becomes the relative datum display value 0 The distance to go is therefore negative when you move in the positive axis direction and positive when you move in the negative axis direction Position encoders The position encoders on the machine convert the movements of the machine axes into electrical signals The ND display unit evaluates these signals determines the actual position of the machine axes and displays the position as a numerical value If the power is interrupted the relationship between the machine axis positions and the calculated actual positions is lost The reference marks on the position encoders and the REF reference mark evaluation feature enable the ND to quickly re establish this relationship again when the power is restored Reference marks The scales of the position encoders contain one or more reference marks When a reference mark is crossed over a
19. ing parameters and compensation values for multipoint axis error compensation If the error recurs contact your service agency To erase error messages After you have removed the cause of error Press the CL key Part Il Installation and Specifications Items Supplied 26 Connections on Rear Panel 27 Power Connection 28 Connecting the Encoders 29 Operating Parameters 30 Entering changing operating parameters 30 List of operating parameters 31 Linear Encoders 35 Setting the display step 35 Compatible HEIDENHAIN linear encoders 36 Multipoint Axis Error Compensation 38 Switching Inputs Switching Outputs 41 Specifications 43 Dimensions of ND 760 E 44 Part Il Installation and Specifications 2b Items Supplied ND 760 E e Power connector ld Nr 257 811 01 User s Manual Connections on Rear Panel ID label Connections on Rear Panel Power switch Power input a N ae q wW NA 0 CSS 1 1 Switching inputs Switching outputs Protective ground Encoder inputs X1 to X3 at The interfaces X1 X2 X3 and X10 comply with the requirements for electrical separation according to EN 50178 27 Power Connection Power leads D S Connect protective ground to Powersupply 100 Vac to 240 Vac 15 96 to 10 96 50 Hz to 60 Hz 2 Hz A voltage selector is not necessary Connecting the Encod
20. ly once i e when the trigger point is traversed for the first time Start position HOME referenced to display value 0 programmable with mT keys SHIFT HOME Trigger points before MIN position 1st trigger point before MIN position programmable with the a EJ keys SHIFT JT MIN 2nd trigger point before MIN position programmable in parameter 17 which is protected by a code number Trigger points with respect to erosion depth 1st trigger point before reaching the erosion depth programmable with the a keys dH SHIFT 2nd trigger point before reaching the erosion depth programmable with the B keys 2 SHIFT Trigger point for erosion depth programmable with the ja SHIFT END Description of functions Start position HOME After an EDM process when the EDM axis has returned to the start position the transistors A1 A2 A3 A4 and A6 are locked high level outputs A5 is conductive low level output The start position is referenced to the defined workpiece datum of the EDM axis and is programmable with the keys SHIFT HOME If the EDM generator and the start position are traversed in the negative direction the transistors for the outputs A1 A2 A3 A4 and A6 become conductive low level outputs Trigger points before MIN position The ND 760 E can be switched from the standard actual value display mode to the MIN position display mode i e the EDM axis always displays the minim
21. n value e Simple compensation of the erosion depth with the aid of an add key e Simple setup function for finding the center line between two edges Coordinate system To describe the geometry of a workpiece the Cartesian coordinate system is used The Cartesian coordinate system consists of three mutually perpendicular axes X Y and Z The point of intersection of these axes is called the datum or origin of the coordinate system Think of the axes as scales with divisions usually in millimeters which allow us to fix points in space referenced to the datum To determine positions on a workpiece the coordinate system is laid onto the workpiece The machine axes are parallel to the axes of the coordinate system The Z axis is normally the tool axis Named in honor of the French mathematician and philosopher Ren Descartes 1596 to 1650 Y Z N Datum or origin X Datum setting The workpiece drawing is used as the basis for machining the workpiece To enable the dimensions in the drawing to be converted into traverse distances of machine axes X Y and Z each drawing dimension requires a datum or reference point on the workpiece since a position can only be defined in relationship to another position The workpiece drawing always indicates one absolute datum the datum for absolute dimensions However it may contain additional relative datums I
22. n the context of a numerical position display unit datum setting means bringing the workpiece and the tool into a defined position in relation to each other and then setting the axis displays to the value which corresponds to that position This establishes a fixed relationship between the actual positions of the axes and the displayed positions You can set up to 9 absolute datum points and store them in nonvolatile memory 12254 250 250 750 320 Absolute datum Absolute workpiece positions Each position on the workpiece is uniquely defined by its absolute coordinates Example Absolute coordinates of position 1 X 10mm Y 5mm Z If you are working according to a workpiece drawing with absolute dimensions you are moving the tool to the coordinates Relative workpiece positions A position can also be defined relative to the previous nominal position The datum for the dimension is then located at the previous nominal position Such coordinates are termed incremental coordinates or chain dimensions Incremental coordinates are indicated by a preceding I Example Relative coordinate of position referenced to position D IX 10 mm IY 10 mm If you are working according to a workpiece drawing with incremental dimensions you are moving the toolby the dimensions Sign for incremental dimensioning A relative dimension has a positive sign when the axis is moved
23. nt for start position HOME m z s Trigger point for the erosion depth Switchover from actual position display to MIN position display Change algebraic sign Call the most recent dialog n the parameter list change the parameters O 8 9 o i m Bl SHIFT key Use of double function keys 3 e Confirm entry Page forward in the parameter list About this manual This manual is divided into two parts Partl Operating Instructions e Fundamentals of positioning ND functions Part Il Installation and Specifications Description of operating parameters Switching inputs switching outputs Part Operating Instructions Fundamentals 6 Switch on Traversing the Reference Marks 12 Datum Setting 13 Working with a Scaling Factor 16 MIN Position Display in the EDM Axis 17 Programming the Trigger Points 18 Add Key 19 Description of Switching Output Functions 20 Error Messages 23 Part Il Installation and Page 25 Specifications and following Fundamentals The ND 760 E position display unit was conceived for use on electrical discharge machines EDM The following functions support operation with EDMs 7 switching outputs for the EDM axis Display of the MIN position the distance to go and the total depth in the EDM axis Because of the quick up and down motion of the EDM axis HEIDENHAIN recommends displaying only the last minimum positio
24. on feature you must e activate this feature with operating parameter 40 see Operating Parameters e traverse the reference marks after switching on the display unit enter a compensation value table Your machine may have a nonlinear axis error due to factors such as axis sag or drivescrew errors Such deviations are usually measured with a comparator measuring system such as the HEIDENHAIN VM 101 You for example determine the screw pitch error X F X for the X axis An axis can only be corrected in relation to one axis that has an error In each axis a compensation value table with 64 compensation values can be generated You can select the compensation table with the SPEC FCT key and the PARAMETER CODE dialog To determine the compensation values e g with a VM 101 the REF display must be selected after selecting the compensation value table SHIFT The decimal point in the left display field indicates that the displayed values are referenced to the reference point If the decimal point blinks the reference marks have not been traversed Select the REF display Entries in the compensation value table Axis to be corrected X Y or Z X Y or Z Datum for the axis to be corrected Here you enter the point starting at which the axis with error is to be corrected This point indicates the absolute distance to the reference point Axis causing the error Do not change the d
25. ssed through the dialog CODE and by entering 95148 Operating parameters are designated by the letter P and a number Example P11 The parameter designation is shown in the X display when you select it with the DATUM and ENT keys The parameter setting is shown in the Y display Some operating parameters have separate values for each axis Such parameters have an additional index number from 1103 P12 1 scaling factor X axis P12 2 scaling factor Y axis P12 3 scaling factor Z axis Example The operating parameters are preset before the unit leaves the factory These factory default settings are indicated in the parameter list in boldface type Entering and changing operating parameters To access the operating parameters gt Press the SPEC FCT key gt Press the SPEC FCT key or 1 2 until PARAMETER appears in the X display gt Confirm your selection by pressing ENT To select protected operating parameters gt Press the AL 2 key to select the POO CODE user parameter gt Enter the code number 95148 gt Confirm with the ENT key To page through the operating parameters gt Page forwards by pressing the ENT key gt Page backwards by pressing the 1 2 key To change parameter settings gt Press the minus key or enter the value and confirm with the ENT key To correct an entry gt Press CL the old value reappears in the input line and becomes effective again To exit the op
26. te existing ones In P70 you can select e Two datum points The selected datum point is displayed via 1 or 2 Nine datum points The selected datum point is displayed in the uppermost axis via d1 to d9 You set a datum by first pressing the corresponding axis key and then entering a numerical value To transfer the new datum press the ENT key The CL key can be used to clear an incorrect entry To call a datum you have set proceed as follows You have set two datum points in P70 4 Select datum 1 or 2 You have set nine datum points in P70 Press the datum key d starts blinking Enter a datum number 1 to 9 Probing workpiece edges to find a centerline datum The edges to be probed run parallel to the Y axis Follow the procedure below for all centerlines between two edges vs Select a datum number see page 13 gt Select the special functions e Confirm the probe centerline function SET lights cC Select the X axis if not already selected The gt 1 lt status symbol starts blinking Touch the workpiece edge D with the tool The first position value D is captured Retract the tool from the workpiece After the second position has been transferred the center line between the two edges is calculated and set as a datum The current position 2nd position probed in relation to the center
27. um position value Due to the quick up and down motion of the EDM axis HEIDENHAIN recommends using this display mode for EDM processes You can define two trigger points that are referenced to the MIN position value The first trigger point is defined with the C keys SHIFT T MIN The user can easily change this trigger point The trigger point can be used as a signal for reversing the direction of movement during cyclic retraction used to improve the flushing process The second trigger point before the MIN position value is defined in parameter P17 or P18 This trigger point can be used for functions whose trigger point must not be changed by the operator It could be used for example for changing the switching functions for the speed controller for the EDM axis so that the electrode retracts rapidly during the cyclic retraction process in order to enable the controller to switch back to the standard speed before the MIN position value has been reached The transistors for both switching outputs are locked when the electrode is retracted along the programmed path The transistor becomes conductive again as soon as the electrode is located within the programmed path during the downward motion Trigger points with respect to the erosion depth Before the erosion depth is reached two trigger points can be entered with the following keys QB SHIFT i SHIFT These trigger points refer to the erosion depth If the ele
28. unctional extra low voltage with electrical separation according to EN 50 178 When connecting inductive loads be sure to connect a suppressor diode in parallel with the inductance Use only shielded cables Connect the shield to the connector housing Inputs at the D sub connection X10 Pin Function 1 E1 Set X axis to zero 9 E2 Set Y axis to zero 2 E3 Set Z axis to zero 3 0 volt 10 0 volt The axis that has been set to zero becomes the active axis SET symbol lights During parameter input it is not possible to externally set the axis to zero Outputs at the D sub connection X10 Pin Function 8 Non functional 7 Al 1st trigger point 1 before MIN position value 6 A2 2nd trigger point before MIN position value 5 A3 1st trigger point before erosion depth 5 A4 2nd trigger point before erosion depth 4 A5 Erosion depth 3 A6 Start position Home or TP3 P21 2 A7 TP4 4 0 volt 1 0 volt Switching Inputs Switching Outputs 41 Switching Inputs Switching Outputs 42 Inputs Input signals Internal pull up resistor 1 active low Outputs Output signals Open collector outputs active low Triggered by contact closure against 0 V or low level voltage via TTL module Minimum pulse duration tmin gt 30 ms Signal level of inputs Status Level High 3 9V lt U lt 15V Low 05V lt U lt 0 9V Ix6mA Delay time for signal output t lt 30 ms
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