this is the output from sheetcam cutting out a cylindrical boss on a rectangular block. I had sheetcam set for a pocket depth of 0.0625, and the z increment set to the same...sheetcam reports it will do 1 pass at 0.0625 depth. However, it instructs me to change the depth several times for each cut when i run the program (I am using the mach2 2D post processor, its for a knee mill with 2 axes powered) See below for the first cut....
N0060 (Part: aluminum_block3)
N0070 (Process: Spiral pocket 0, Mill/Router, 0.375 inch diameter, 0.0625 inch Deep)
N0080 M00 (Set Z to 0.2110) <----------SET Z TO CLEARANCE HEIGHT
N0090 G00 Z0.2110
N0100 M6 T0 (Mill/Router, 0.375 inch diameter)
N0110 G43 H0
N0120 G00 Z0.2110
N0130 M03 S0
N0140 X1.8480 Y1.7625
N0150 M00 (Set Z to 0.0197) <----------How do I get rid of this? This value doesnt correspond to any settings (tool height, increment, thickness, etc) in sheetcam... I have no idea where this is coming from
N0170 M00 (Set Z to 0.0000) <----------How do i get rid of this??
N0180 G01 Z0.0000 F1
N0190 M00 (Set Z to -0.0625) <----------correct depth of cut
N0210 X1.7625 F10
N0230 G03 X1.8480 Y1.7625 I2.6438 J0.8012
N0240 G01 X1.5000 Y1.5000
N0270 G03 X2.2739 Y1.5000 I2.1324 J-1.3050
N0280 G01 X1.5000
N0290 X1.2375 Y1.2375
The 0.0197 move is actually 0.5mm. SheetCam stops rapid moves 0.5mm above the surface in case the material is mis-positioned or there are some chips in the way. Normally this has a negligible effect on the overall cut time but in your specific case it causes a problem. I'll have a look at the post and see if I can take out some of the Z moves.