Copyright Goodheart-Willcox Co., Inc. Chapter 9 CNC Mill Programming 207 this page in different locations, but the process is similar regardless. Use the cursor to highlight the X-axis box in the correct G54–G59 row and press the Part Zero Set button, Figure 9-28. This records the machine posi- tion in the appropriate offset. Repeat this process for the Y axis. Notice there is also an offset for the Z axis. Placing a number in that column will change the Z0 plane on which all the tools were established. There are instances where tools should be set to alternate planes. In those cases, a Z offset will be used. For the purposes of this text, this will be left as 0. You may also notice that there are more WCS settings than just G54–G59, and those can be used, if necessary, for multiple parts need- ing multiple work coordinates, Figure 9-29. As a programming note, this system allows for the manufacturing of multiple pieces with the same pro- gram just by altering the WCS. Goodheart-Willcox Publisher Figure 9-28. The Part Zero Set button will record the machine position in a work coordinate setting. POWER UP RESTART TOOL OFSET MESUR CHIP STOP JOG LOCK CHIP REV –10 FEED RATE +10 FEED RATE 5% RAPID 25% RAPID 50% RAPID 100% RAPID STOP 100% SPINDE 100% FEED RATE –10 SPINDLE +10 SPINDLE HAND CNTRL SPIN HAND CNTRL FEED SELECT PROG SEND RS232 RECV RS232 ERASE PROG ALL AXES ORIGIN SINGL AXIS HOME G28 .0001 .1 .001 1. .01 10. .1 100. COOLNT ORIENT SPINDLE ATC FWD ATC REV SINGLE BLOCK DISPLAY PRGRM CONVRS POSIT OFFSET CURNT COMDS ALARM MESGS HOME PAGE UP PAGE DOWN END PARAM DGNOS SETNG GRAPH HELP CALC DRY RUN OPTION STOP BLOCK DELETE INSERT LIST PROG ZERO RET HAND JOG MDI DNC MEM EDIT ALTER DELETE UNDO CW CCW SPINDLE SHIFT F L R X A G M S Y B H N T Z C D J P V ( E 7 & % * + @ $ , = : ! ? # 8 9 4 5 6 1 2 3 – 0 . CANCEL SPACE WRITE ENTER K Q W ) ] [ / I O U EOB NEXT TOOL TOOL RELEASE PART ZERO SET TOOL CHANGER RESTORE RESET F1 F2 F3 F4 CHIP FWD CLNT DOWN AUX CLNT OVERRIDES CLNT UP +B +A +X +Z –Y –X –A –B –Z +Y CURSOR G54 G55 G56 G57 G58 Goodheart-Willcox Publisher Figure 9-29. The same program can be run on multiple parts at different locations by using various WCS numbers.