Machsupport Forum
GCode, CAD, and CAM => GCode, CAD, and CAM discussions => Topic started by: pkirk257 on July 27, 2007, 01:24:07 PM

I am trying to cut a 1" hole .500 deep in a 2" x 2" x 1" alum block using a 3/16 flat endmill. I drew the part in rhino and imported it into feature cam to generate the g code. I load the gcode in mach3 and when i run the code the z goes up about 2" and moves to the center of the hole and starts going down and stops about 1" from the block and starts to cut out the hole. I have all the offsets set to 0 and im starting off at 0. I am using a post processor i downloaded off the net and im sure i need to work on it a bit. I am running a Taig with geco drives 201's and featurecam 12. If anyone has a post for featurecam it would be most appreciated.
Here is the first bit of gcode.
% (=============================================)
(Project: Untitled2 )
(Compiled: 7262007)
()
(FeatureMILL POST for MACH3 MILL rev1.0  03/05/2006)
(MACH3MILL  rev1.0.CNC)
(NovaLab / CK)
(=============================================)
(====== Tool No 1 = 3/16 2 flu endmill)
(====== Tool No 1 diam. = 0.1875)
(..... Segment = SRF_MILL1)
(..... Operation = ROUGH1 Z LEVEL)
(=============================================)
N75 M91000 (Leadin Macro for Smithy Setup)
N80 G40 G49 G17 G80 G61 G70 G90 (Inch mode & Exact Stop)
N85 G00
N90 T1 M6
N95 F4.69
N100 G1 X1.0535 Y1.0336 S2500 M03
N105 M08
N110 G43 H1 Z1.999
N115 Z1.099
N120 G01 X0.9208 Y0.9012 Z1.0842 F4.69
N125 X1.0535 Y1.0336 Z1.0694
N130 X0.9208 Y0.9012 Z1.0546
N135 X1.0535 Y1.0336 Z1.0398
N140 X0.9208 Y0.9012 Z1.0249
N145 X1.0535 Y1.0336 Z1.0101
N150 X0.9208 Y0.9012 Z0.9953
N155 X1.0535 Y1.0336 Z0.9805
N160 X0.9208 Y0.9012 Z0.9657
N165 X1.0535 Y1.0336 Z0.9509
N170 X0.9208 Y0.9012 Z0.9361
N175 X1.0535 Y1.0336 Z0.9213
N180 X0.9208 Y0.9012 Z0.9065
N185 X1.0535 Y1.0336 Z0.8917
N190 X0.9208 Y0.9012 Z0.8768
N195 X1.0535 Y1.0336 Z0.862
N200 X0.9208 Y0.9012 Z0.8472
N205 X0.9379 Y1.0046 F9.37
N210 Y0.9913
N215 X0.9399 Y0.9805
N220 X0.9449 Y0.9686
N225 X0.9468 Y0.9658
N230 X0.9516 Y0.9585
N235 X0.9547 Y0.9554
N240 X0.9579 Y0.9523
N245 X0.9611 Y0.9492
N250 X0.9699 Y0.9434
N255 X0.9778 Y0.94
N260 X0.9826 Y0.9381
N265 X0.9924 Y0.9361
N270 X1.0014
N275 X1.0074
N280 X1.0173 Y0.938
N285 X1.0235 Y0.9406
N290 X1.0303 Y0.9434
N295 X1.0312 Y0.944
N300 X1.0391 Y0.9493
N305 X1.0417 Y0.9518
N310 X1.0438 Y0.9538
N315 X1.0483 Y0.9584
N320 X1.0491 Y0.9597
N325 X1.0547 Y0.968
N330 X1.0555 Y0.9698
N335 X1.06 Y0.9805
N340 X1.0622 Y0.9918
N345 Y1.005
N350 X1.0601 Y1.0159
N355 X1.0573 Y1.0224
N360 X1.0554 Y1.027
N365 X1.0548 Y1.0284
N370 X1.0534 Y1.0305
N375 X1.0496 Y1.0362
N380 X1.0484 Y1.0381
N385 X1.0444 Y1.0421
N390 X1.0418 Y1.0446
N395 X1.0392 Y1.0472
N400 X1.0332 Y1.0512
N405 X1.0294 Y1.0536
N410 X1.0241 Y1.0558
N415 X1.0225 Y1.0565
N420 X1.0179 Y1.0583
N425 X1.0092 Y1.06
N430 X0.993 Y1.0604
N435 X0.9822 Y1.0583
N440 X0.9705 Y1.0535
N445 X0.9686 Y1.0523
thanks!

I think you have your datums set wrong in Rhino or in Feature Cam or both.
When you extruded the block in Rhino you probably entered Z1. and not Z1. so the datum is on the bottom of the block.
Remember that in most cases all Z axis cutting moves are in a minus direction. E.g. G01 Z.05 F2.
Graham.