user`s manual - Forest and Wildlife Research Center
Contents
1. Reviews teeth bite an Minima feed speed ft min Mazima feed speed ft nim Minis depth of cun An Marium depth of 0 044 0 07 2is 352 8 13 0 tut dm 20 4 Wursepoues ot 252 8 ft min feed speed Wersepewer plus TO a 342 0 t mdm feed speed 1495 1 eat Depth of Teed Speed Tooth Cus tial Inn Mite Gn 0 903 996 194 overbite T 0 799 433 ans vv ibat 0 ort 43 ame reta 9 0 42 297 2 111 overbite 10 0 479 509 0 0990 overbite 41 0 r 208 ot te it 0 367 427 0 079 overbite 13 0 353 937 ex owerbite 15 0 2 409 LL 14 0 45 ose 15 0 301 33 o1 16 0 20 150 em 17 0 tez 460 ote 18 0 46 544 oto 19 0 32 45 2 047 0 0 4 LAJI oss 20 4 15 409 ow 21 0 08 614 0 043 underbite tt 0 136 428 0 040 erbite 23 0 199 208 0 025 derbit 24 0 380 79 ex c ae 15 0 199 104 e w erb 26 0 146 040 024 wmderbite 17 0 M9 125 e dm re t 0 143 10 e21 w a 29 0 147 927 wuderbi Ideally minimum tooth bite is 10 grester than ride clearance This situatiom would result in the fellewing Hinimum tooth bite in 0 0484 Niniwus feed speed ft nim zn Baria depth of ee ind ist Feed feeed and Depth of On Obeervetieons Figure 7 Performance Limitations Results form the following output data describing the acceptable operating range for the saw at gullet capacity Saw speed ft min Minimum tooth bite in Maximum tooth bite in Minimum feed speed ft min Maximum feed speed ft min Minimum de2. Click the Save button Tip Type awadeceauapes Obs Workpiece Depth of S Avg depth of cut 18 in No Length ft cut in ae Optimize Troubleshoot Band Saw Data Entry 15 Click Ok to close the Feed Speed and Depth of Cut Observations form 16 Save the input data by following these steps Wood Species Speciic Gravity Choose wood species ip gr a Click File Save Input on the menu bar b When the Save As dialog box appears enter Enter specie gaviy Tutorial Band A sets in the File name text box coe c Click the Ok button Figure 12 Band Saw Data entry form for band saw 17 Click the Calculate button to display the output tutorial A Sew speed fz min Tinie Teeth bite Ani Harisa teeth bite ini teed speed ft min Rimsa depth ef et Navin depth ef et inh Horsepower at MI O8 ft min feed speed 10 1 Morsepower plus 20 at 352 9 ft min feed spoot 168 8 Depth of Feed tpeed Town Cw inb dinin Bite tin so 23 99 0 194 overbite 7 0 739 4633 6 184 overbite te 411 043 9 119 orerbine so 41 39 6 111 vrerbite 12 0 478 504 0 09 overbite 1 0 420 208 0 087 vrerbite n e s07 4 9 0 079 verbita ane 33 717 0 07 erecta 13 6 312 900 0 07 ie ms 4 0 066 ite 301 221 9 041 14 0 90 590 0 047 17 6 242 480 0 084 ito 144 144 0 050 15 6 131 4f4 0 047 zo o zis 0 045 2 4 246 600 0 044 tio 199 414 0 043 wederbite z o inane 9 040 w rat 22 0 199 208 0 035 wdertite 24 0 180 799 0 037 u erbit
3. Il 450 MHz processor Pentium III 667 MHz processor recommended SETS can be installed on the following operating systems Microsoft Windows 2000 Professional Windows 2000 Server Windows XP Professional Windows XP Home Edition Windows Server 2003 or Windows Vista Minimum RAM requirements 96 MB for Windows 2000 Professional 192 MB for Windows 2000 Server 160 MB for Windows XP Professional 96 MB for Windows XP Home Edition 160 MB for Windows Server 2003 256 MB for all operating systems recommended 20 MB of available hard disk space on the installation drive S CD ROM or DVD ROM drive Super VGA 1024 x 768 or higher resolution display with 256 colors Microsoft Mouse or compatible pointing device ETS is written in Microsoft Visual Basic NET version 2003 Microsoft Corp 2003 3 S h ETS must be installed and run on your computer s ard drive The program will not run directly from the installation CD To install SETS perform the following steps l 2 Begin at the Windows desktop Insert the SETS installation CD into your CD ROM or DVD ROM drive If the installation program does not start automatically follow these steps Click the Start button on the taskbar and then click the Run command appearing on the a Start menu The Run dialog box appears Type E SETUP in the Open textbox of the Run dialog box If your CD ROM or DVD ROM drive is designated by a letter othe
4. When entering data in the Band Saw Data Entry form you can use the Tab key the Enter key or the mouse pointer to navigate from one text box to another After entering data for all variables click the Calculate button and SETS will generate the output results and the performance limitations graph 10 OPTIMIZE TROUBLESHOOT CIRCULAR SAW DATA ENTRY FORM The Circular Saw Data Entry form Figure 5 allows users to enter circular saw data describing a specific large circular saw and to calculate the saw s performance output results To display this form click File New Optimize Troubleshoot Circular Saw on the menu bar This form consists of text boxes that prompt you to enter values of various characteristic variables that describe your particular circular saw and cutting practices These variables include the following Number of teeth Gullet area Plate thickness Saw diameter Saw kerf Rotations per minute RPM Wood species or specific gravity When entering data in the Circular Saw Dota Entry form you can use the Tab key the Enter key or Optimize Troubleshoot Circular Sow Data Entry ik Sam Data Saw Speed Number of Teeth RPM Gulet Avoa n Plate Thechners in Wood Specess Specilic Gavity Saw Diameter rn Choose wood tpeciei ip gr Sow Ked n Erter specie gady Observations Calculate Figure 5 Circular Saw Data Entry form W Feed Speed and Depth of Cut Obverwations O
5. display the output results shown in Figures 17 and 18 TRE The blue portion of the curve in Figure 18 indicates the optimal operating range for the saw at gullet capacity For this saw the log diameters are restricted to a range of 14 2 inches to 24 3 inches The region of the graph lying between the two horizontal dotted lines in Figure 18 indicates the acceptable operating conditions for the saw Within this region the minimum feed speed is 174 5 ft min and the maximum feed speed is 331 8 ft min If feed speeds exceed 331 8 ft min the saw teeth will be subject to excessive strain If feed speeds fall below 174 5 ft min saw dust will spill from the gullets and cause the saw rim to overheat axr d Saw speed It mim at 231 9 Main feed pius 10 at 231 8 ft nin feed speed Teed i e ow te 70 pw 0 340 ite eo 6 290 wverbite o om vetita 19 0 le 0 200 everbite i o 464 479 0 175 overbite 12 0 412 070 0 15 overbite 12 0 271 883 0 140 everbite 14 0 237 000 0 117 vecbita ILI m m 0 1158 uae 209 483 ou i o 794 833 oi 17 0 T44 417 0 190 we aer 722 0 092 iso 232 140 0 087 20 0 218 579 0 002 zo 206 425 0 079 2 0 135 570 0 074 LJ 485 792 0 07 0 ae 944 0 067 LI s 0 044 LJ we 0 044 me oora 5 a z o 0 086 Figure 18 Performance Limitations Graph for circular a A saw tutorial Figure 17 Performance Limitations Results for circular saw tutorial Of the five observa
6. operating range for the saw at gullet Perlarnance Linetetions Dragh Figure 14 Performance Limitations Graph for band saw tutorial A capacity Along this portion of the curve the log diameters are restricted to a range of 13 0 inches to 20 4 inches For log diameters within this range Figure 13 shows the corresponding feed speeds and tooth bite dimensions The region of the graph lying between the two horizontal dotted lines in Figure 14 indicates the acceptable operating conditions for the saw Within this region the minimum feed speed is 215 6 ft min and the maximum feed speed is 352 8 ft min If feed speeds exceed 352 8 ft min the saw teeth will be subject to excessive strain If feed speeds fall below 215 6 ft min saw dust will spill from the gullets and cause the saw rim to overheat The five dark blue rectangles appearing on the graph are the plotted depth of cut feed speed values The feed speed values were computed based on the observation data entered in the Feed Speeds and Depth of Cut Observations form Figure 6 As can be seen from the graph there is one depth of cut and feed speed value depth of cut 14 in feed speed 325 ft min lying directly on the blue portion of the curve indicating that the saw was operating at gullet capacity for that observation There are two points depth of cut 15 in feed speed 257 ft min and depth of cut 11 in feed speed 320 ft min that lie below the curve but within
7. real damage if saw speed falls below minimum feed speed sawdust will be smaller than the side clearance and will spill onto the saw face resulting in friction and creation of destabilizing heat in the saw body Taylor et al 1999 have developed new equations for horsepower computation that provide a new and simplified means to compute horsepower for both circular and band saws This method corrects significant errors in past approaches The SETS software uses both Suchland s equations to draw a performance limitations graph and Taylor s horsepower equations to compute the maximum required horsepower for the specific circular or band saw defined by user supplied saw characteristic data Thus SETS allows sawmill managers unfamiliar with saw engineering mechanics to determine whether their saw is being operated within its design limitations and to design optimize and troubleshoot their saws for best performance Use of the SETS software will reduce the need for mechanical engineering specialists to perform these tasks Always follow manufacturer s instructions and warnings maintain appropriate safety guarding and protocols and utilize appropraite personal protective equipment Mississippi State University assumes no liability for the content of this publication or for action taken based on the content herein 2 SYSTEM REQUIREMENTS The minimum system requirements for installing and running SETS are PC with a Pentium
8. the Save Results menu choice opens the Save As dialog box allowing you to enter a file name for the output results and save the results 8 PRINTING DATA AND RESULTS The SETS software allows you to print both input saw data and output results to a local printer or a network printer To print to a printer choose File Print on the menu bar If the output results have been generated and appear on the screen both input and output data will be printed If the output results have not been generated only the input data will be printed 9 OPTIMIZE TROUBLESHOOT BAND SAW DATA ENTRY FORM The Band Saw Data Entry form Figure 4 allows users to enter band saw data describing a specific band saw and to calculate the saw s performance output results To display this form click File New Optimize Troubleshoot Band Saw on the menu bar This form consists of text boxes that prompt you to enter values of various characteristic variables that describe your particular band saw and cutting practices These variables include the following Oullet area Pitch Plate thickness gauge Saw kerf Surface speed Rotations per minute RPM Wheel diameter Wood species or specific gravity iOptimize Troubleshoot tand Saw Data Entry gauge Piste Thickness 018 p 4 Wood Species Speciic Gravity Choose wood speciem gr SawKed n Eria speciic guy Cacdse btervahons J Figure 4 Band Saw Data Entry form
9. the minimum and maximum feed speed range indicating that the saw was operating within the acceptable feed speed range but the gullet capacity was underutilized for these two observations There is one point depth of cut 16 in feed speed 336 ft min that lies above the curve indicating that the saw exceeded gullet capacity for that observation The last point depth of cut 12 in feed speed 186 ft min lies below the minimum feed speed indicating that saw dust would spill out of the gullets for this feed speed depth of cut combination As can be seen in Figure 13 the maximum required horsepower at the maximum feed speed of 352 8 ft min is 168 2 This horsepower value is based on the horsepower equations given in Example 5 of Taylor et al 1999 These horsepower equations use a range of species specific wood densities and tooth bites to calculate the required horsepower The SETS software adds a 20 risk factor to the resulting horsepower derived from these equations 15 BAND SAW TUTORIAL B This section provides a second band saw tutorial intended to help users optimize or troubleshoot a band saw using the SETS software An explanation of the results and an interpretation of the performance limitations graph is given To run this tutorial follow these steps 1 Start the SETS software as described in Section 3 2 Click File New Optimize Troubleshoot Band Saw 3 In the Optimize Troubleshoot Band Saw Data En
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11. Recert ZiTuonas Crodar sets Document Desktop c My Documents My Computer j REEF Files of pe SETS fies sets Cancel Figure 3 Open dialog box 3 7 E Laana Figure 2 File New submenu 7 SAVING DATA AND RESULTS Saving data in the SETS software consists of saving either the input data describing your saw or the output results describing your saw s performance limitations Input saw data are saved in SETS using a sets file extension while the output results are saved using the txt file extension You can save the input saw data to your computer s hard drive at any time by clicking either the Save Input or the Save Input As menu choice under the File menu Clicking the Save Input menu choice saves the input data appearing in the SETS saw data form under the current input file name if one exists If an input file name has not been given for the current input data the Save As dialog box will appear allowing you to enter a file name and save the data Clicking the Save Input As menu choice automatically opens the Save As dialog box allowing you to save the current input data using either a file name other than the current input file name or the current input file name itself Once the output results data for the current saw have been generated and appear on the SETS main form they can be saved to your computer s hard drive by clicking the Save Results menu choice under the File menu Clicking
12. Saw Engineering and Troubleshooting Software SETS USER S MANUAL a Developed by Department of Forest Products Forest and Wildlife Research Center Mississippi State University The Forest and Wildlife Research Center at Mississippi State University was established by the Mississippi Legislature with the passage of the Renewable Natural Resources Research Act of 1994 The mission of the Center is to conduct research and technical assistance programs relevant to the efficient management and utilization of the forest wildlife and fisheries of the state and region and the protection and enhancement of the natural environment associated with these resources FWRC scientists conduct research in laboratories and forests administered by the University and cooperating agencies and industries throughout the country Research results are made available to potential users through the University s educational program and through Center publications such as this which are directed as appropriate to forest landowners and managers manufacturers and users of forest products leaders of government and industry the scientific community and the general public Dr George M Hopper is director of the Forest and Wildlife Research Center Authors Dr Philip Steele is a professor in the department of forest products Craig Boden is a research associate in the department of forest products Acknowledgement This research is funded by the Wood Educa
13. aridesign Deluxe main form 4 Scroll down the list of standard saws and click on the saw named 380 Q U 5 Click the Load button The VariDesign Deluxe Tooth Designer form Figure 10 appears 7 VariDesign Deluxe Tosth Designer e Data 380 Q Uaa td 380 Q Uaa Saw Data Cut Data Ne EN ED Average depth of Cut h tenal 3 Suttace ft min f mm BE RPM OM raei Dia a n o Tip Type Swagedi Shaped Swaged Shaped amp Side ground Cancel C Tipped Figure 10 VariDesign Deluxe Tooth Designer form Figure 11 VariDesign Deluxe Bandsaw Data form 6 To modify the 380 Q U standard tooth design 11 Press the lt Alt Tab gt key combination to return click the Modify button to the SETS software Do not close the VariDesign 7 Enter 380 Q Ua in the Tooth Name text box Deluxe program for the name of the new tooth and click Ok 12 In the SETS software click File New Optimize 8 Click the Band Data button The Bandsaw Troubleshoot Band Saw to display the Data form Figure 11 appears Optimize Troubleshoot Band Saw Data 9 Enter the following data into the Bandsaw Data Entry form Figure 4 form 13 Enter the data for the band saw that was just Saw Length 38 ft O in designed as shown in Figure 12 Saw Width 10 in 14 Click the Observations button and then enter Thickness gauge 0 072in 15 the following five observations into the Feed Kerf 0 16 in Speed and Depth of Cut Observations form Surface Speed 9800 ft min 10
14. e LJ A73 108 0 024 iate e 346 000 0 036 w at 17 0 189 s29 0 033 wderbit m0 153 505 0 021 w erbite 29 6 147 387 0 030 undertite 3 6 142 704 0 019 ate ideally mimimum tceth bite ts 109 greater tham side clearance This sitwatiom would result im the following Minimus tooth bite in inise eed speed ft min Nazima depth of cut ini o o s 877 2 19 7 Teed Ipeed and Depth of Cuts Observations Observation length of Depth of Feed Speed e Piece LR Cw Cn fem 1 man LI Af 60 11 000 5 060 ise 000 z 16 000 11 900 3 000 320 000 Figure 13 Performance Limitations Results for band saw tutorial A results shown in Figures 13 and 14 18 Save the output results to a text file by following these steps a Click File Save Results on the menu bar b When the Save As dialog box appears enter Tutorial Band A txt in the File name text box c Click the Ok button 19 Print the input data and the output results by following these steps a Click File Print on the menu bar b When the Print dialog box appears select the correct printer and then click the Ok button 20 If you want to modify the saw input data and run the analysis on the modified data click the Modify button on the Optimize Troubleshoot Band Saw Data Entry form Change the saw data as desired and click the Calculate button to generate the new output results The blue portion of the curve in Figure 14 indicates the optimal
15. ground for the software and a tutorial The tutorial will prompt for information that sawmill staff will be able to input without engineering training Saw designs for new sawing machines and optimizing and troubleshooting of current saws will be provided by the SETS software Saw mechanics engineering for the purpose of purchasing optimizing or troubleshooting saws is a difficult task for which few sawmill managers or millwrights have training or easily applied tools The interaction of the following important variables are very complex hook rake and clearance angles bite per tooth material feed speed tooth speed side clearance depth of cut and horsepower requirements Researchers such as Suchsland Undated Lunstrum 1985 and Taylor et al 1999 have attempted to simplify the analysis of the interaction of these variables to allow sawmill personnel to rationally design optimize and troubleshoot their saws However software to allow users to apply the required complex equations describing saw performance without an engineering background has been unavailable until now Suchland s equations allow development of a performance limitations graph that provides the minimum and maximum feed speed constraints for a saw operating at gullet capacity These constraints are as specific to each saw as fingerprints are to humans If a saw s maximum feed speed is exceeded the saw teeth will be over loaded resulting in potential or
16. pth of cut in Maximum depth of cut in Maximum horsepower This form also tabulates the feed speed and tooth bite at gullet capacity for a depth of cut ranging from 6 inches to 30 inches This tabulation indicates whether the feed speed and corresponding tooth bite are within the acceptable operating range for the saw This form also displays the data entered in the Feed Speeds and Depth of Cut Observations form Section 11 and shows the corresponding feed speed for each observation Perlormance Limitations Graph Figure 8 Performance Limitations Graph 13 PERFORMANCE LIMITATIONS GRAPH The Performance Limitations Graph Figure 8 displays a curve indicating the relationship between feed speed and depth of cut at gullet capacity for the saw defined by the user supplied characteristic saw data At any point along the curve the saw is operating at gullet capacity Any point above the curve would exceed the gullet capacity and any point below the curve means the saw is operating below gullet capacity As can be seen from the graph the relationship between feed speed and depth of cut is inversely related Thus cutting smaller diameter logs would require an increased feed speed to maintain gullet capacity and cutting larger diameter logs would require a decreased feed speed There are limits however on the size of logs that can be cut for a given saw at gullet capacity Cutting smaller diameter logs would increase the
17. r than E substitute that letter for E c Click the Ok button on the Run dialog box Follow the on screen instructions provided by the SETS installation program To run SETS perform the following steps 2 3 Click the Start button on the taskbar Point to All Programs Point to the SETS folder icon appearing in the All Programs list and then click the SETS exe icon Alternatively you can double click the SETS shortcut icon on your Windows desktop INSTALLING AND RUNNING SETS 4 THE SETS MAIN FORM The SETS software consists of a main form Figure 1 used for creating a new saw file opening an existing saw file closing a saw file and saving and printing input and output data The main form s menu bar consists of a File menu that contains the following choices New Creates a new saw file Open Opens an existing saw file Close Closes the currently opened saw file Save Input Saves the input data of the current saw under the current input file name Save Input As Opens the Save As dialog box allowing the user to save the input data of the current saw under a specified file name Save Results Opens the Save As dialog box allowing the user to save the output results of the current saw under a specified file name Print Prints the input data and the output results of the current saw Exit Closes the SETS software 5 CREATING A NEW SAW FILE The SETS softwa
18. re allows you to create and maintain as many individual saw files as desired To create a new saw file choose File New on the menu bar Under the File New menu option a submenu appears Figure 2 consisting of the following three menu choices Design Band Saw Optimize Troubleshoot Band Saw e Optimize Troubleshoot Circular Saw Select one of the above three choices and SETS will display the appropriate data input form s You can then save the new saw file to your computer s hard drive at any time by clicking the Save Input or the Save Input As menu choice under the File menu 3 ew rd Pd w 5 Figure 1 SETS main form 6 OPENING A PREVIOUSLY SAVED SAW FILE To open a saw file that was previously saved in the SETS software follow these steps 1 Click File Open on the menu bar to display the Open dialog box Figure 3 2 Use the Look in drop down list on the Open dialog box to go to the folder containing the saw file and select the file from the files list Alternatively you can type the file path and file name in the File name text box of the Open dialog box 3 Make sure the file name appearing in the File name text box has a sets extension 4 Click the Open button The contents of the saw file will be loaded into the SETS software and you may start entering editing or deleting the input data Look ix O Sow Fies EJ Tutorisi Band A sets Ed Tutorisi Band B sets My
19. rs are restricted to a range of 11 2 inches to 16 6 inches Of the five observation points three are below the curve but lie in the acceptable feed speed range indicating that the gullet capacity was underutilized for those observations The other two are above the curve indicating that the saw exceeded gullet capacity for those observations The maximum required horsepower at the maximum feed speed of 360 3 ft min is 152 5 16 CIRCULAR SAW TUTORIAL This section provides a tutorial intended to help users optimize or troubleshoot a typical large diameter circular saw This tutorial covers data entry results generation and an interpretation of the performance limitations graph To run the circular saw tutorial follow these steps 1 Start the SETS software as described in Section 3 2 Click File New Optimize Troubleshoot Circular Saw 3 In the Optimize Troubleshoot Circular Saw Data Entry form enter the following data values Number of teeth 50 Gullet area 2 0 in 2 Plate thickness 0 165 in Saw diameter 54 in Saw kerf 0 281 in RPM 637 Species Pine Loblolly 4 Click the Observations button and then enter the following five observations into the Feed Speed and Depth of Cut Observations form Obs Workpiece Length Depth of cut No f in Hi o o In O l na 7 5 Click Ok to close the Feed Speed and Depth of Cut Observations form 6 Click the Calculate button to
20. teeregion Wo Watpece lengh P Oech al Os int Secondi i 4 4 4 z 2 4 4 e 5 i i 4 4 4 i 4 4 J 4 l 10 i i 4 i n 1 H 2 i D u 15 1 L 4 o Delete flow Figure 6 Feed Speeds and Depth of Cut Observations form the mouse pointer to navigate from one text box to another After entering data for all variables click the Calculate button and SETS will generate the output results and the performance limitations graph 11 FEED SPEEDS AND DEPTH OF CUT OBSERVATIONS FORM The Feed Speeds and Depth of Cut Observations form Figure 6 allows the user to enter data to calculate the current feed speeds in a particular mill This form contains a data table that prompts the user for data values of up to fifteen observations These data values consist of the following e Workpiece length ft Depth of cut in Seconds Feed speeds will be computed based on the above values Each feed speed along with its corresponding depth of cut will be plotted on the performance limitations graph Section 13 12 PERFORMANCE LIMITATIONS RESULTS FORM The Performance Limitations Results form Figure 7 displays numerical results describing the optimum cutting conditions for the saw defined by the user supplied characteristic saw data This form displays Pee spesa EMA 5 400 Rinia tooth bite in
21. tion and Resource Center Northeastern Area State and Private Forestry Forest Service U S Department of Agriculture the USDA Forest Service State and Private Forestry Technology Marketing Unit and Mississippi State University s Forest and Wildlife Research Center This manual was developed in cooperation with Simonds International Fitchburg MA To Order Copies Copies of this and other Forest and Wildlife Research Center publications are available from Publications Office Forest and Wildlife Research Center Box 9680 Mississippi State MS 39762 9680 Please indicate author s title and publication number if known Publications are also available at the web site at www cfr msstate edu Citation Steele PH C Boden 2009 Saw Engineering and Troubleshooting Software SETS User s Manual for Band and Circular Saws Forest and Wildlife Research Center Research Bulletin Mississippi State University 11 pp Research Bulletin FP521 FOREST AND WILDLIFE RESEARCH CENTER Mississippi State University Saw Engineering and Troubleshooting Software SETS USER S MANUAL for Band and Circular Saws 1 INTRODUCTION This manual describes the functional capabilities of the Saw Engineering and Troubleshooting SETS software SETS is a PC based software system designed for sawmill managers or millwrights who wish to purchase optimize or troubleshoot their circular or band saws This manual provides information on the back
22. tion points two lie in the indicating that saw dust would spill out of the gullets acceptable feed speed range but are below the for these feed speed depth of cut combinations characteristic curve indicating that the gullet capacity was underutilized for these observations The other The maximum required horsepower at a feed speed three points lie below the minimum feed speed of 331 8 ft min is 207 6 11 LITERATURE CITED Armstrong Mfg Co 2003 Varidesign Deluxe Version 1 305 9 Portland OR Lunstrum S J 1985 Balanced saw performance Tech Rep No 12 USDA Forest Service Forest Products Laboratory Madison WI 17 p Microsoft Corporation 2003 Microsoft Visual Basic NET Version 2003 Redmond WA Suchsland O Undated Operating characteristics and performance limitations of circular and band saws Dept of Forestry Cooperative Extension Service Michigan State University Ext Bull E 1353 6 p Taylor J A Gingras J White R Niessen and D Gagne 1999 A report summary of Power requirements for sawing and chipping In Proc of Saw Tech 99 International Conference Nov 4 5 Seattle WA pp 75 84 12 Feed Speed and Depth of Cut Data Sheet Sawing machine Date Observation Workpiece Depth of No Length ft t in 1 2 3 Feed Speed and Depth of Cut Data Sheet Sawing machine Date Observation Workpiece Depth of No Length ft t in 1 2 3 MISSISSIPPI ST
23. tooth bite due to the increased feed speed and hence subject the saw teeth to excessive strain Cutting larger diameter logs would decrease the tooth bite due to the lower feed speeds and hence produce very fine saw dust particles that may spill from the gullets into the spaces on each side of the blade Thus acceptable operating conditions for a saw are restricted to only n n D m a n Figure 9 Armstrong VariDesign Deluxe main form a portion of the curve The blue portion of the curve shown in Figure 8 indicates this acceptable operating range The horizontal and vertical lines extending from the y axis and the x axis to the curve indicate respectively the minimum and maximum feed speeds and corresponding depths of cut that define the acceptable operating range 14 BAND SAW TUTORIAL A This section provides a tutorial intended to help users design a band saw using the Armstrong Varidesign Deluxe software 2003 This tutorial also shows how to optimize or troubleshoot the band saw using the SETS software An explanation of the results and an interpretation of the performance limitations graph is also given To run this tutorial follow these steps 1 Start the SETS software as described in Section 3 2 On the SETS main form click File New Design Band Saw The Armstrong VariDesign Deluxe main form Figure 9 appears 3 Maximize both windows of the Armstrong V
24. try form enter the following data values Gullet area in 2 Pitch 2 in Plate thickness 0 072 in Saw kerf 0 165 in RPM 531 Wheel diameter 72 in Species Pine Loblolly 16 6 Mariwem depth ef cut ind at 0 3 pius Doe s a Worsepowsr i ists Worsegoves ft min feed speed at 340 3 x wim toed pert Depth of Tooth Cut in nim pite 6 0 0 154 0 12 0 6 108 9 0 0 092 10 0 2 2 0 082 11 0 0 074 ae 340 329 D oT 22 s55 EEETEEEEEEE ferrrrrerere I bite This situation would result i Nimiwum tooth bite im Muimimum feed mpeed ItIREA fasimum depth ef evt Length ef Figure 15 Performance Limitations Results for band saw tutorial B 4 Click the Observations button and then enter the following five observations into the Feed Speed and Depth of Cut Observations form 5 Click Ok to close the Feed Speed and Depth of Cut Observations form 6 Click the Calculate button to display the output results shown in Figures 15 and 16 The region between the two horizontal dotted lines in Figure 16 indicates acceptable operating conditions The minimum and maximum feed speeds are 232 7 ft min and 360 3 ft min respectively The blue Performance Limitations Graph Figure 16 Performance Limitations Graph for band saw tutorial B portion of the curve indicates the optimal operating range for the saw at gullet capacity Along this portion of the curve the log diamete
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