[cjjonesarmory]

I used Alibre CAM to create GCode for what AlibreCAM is calling the "Mach3-Inch" post processor. My CNC Mill is a Novakon NM-200 and I am running Mach3 version R3.042.020.

The problem is that when generating GCode to machine a pocket using the G03 code, Mach3 says that using the "K word" in this scenario is an error. When I eliminate the "K word", testing by (cutting air) appears to cut correctly. Could this be a post processor error or GCode syntax problem? I don't fully understand how the K values are being used.

The full program uses a 0.6250" End Mill to cut a pocket 0.3750" deep with a diameter of 0.8500". There are a total of 8 of these pockets/counterbores. I used Alibre CAM "Hole Pocket" option to write the code. The specific line containing an instance of the error is included below:

G03 X2.1750 Y6.8125 Z-0.1250 I0.0348 J0.1070 K0.5000 F6.0

And the full code:

G00 G49 G40.1 G17 G80 G50 G90
G20
(002 - Hole Pocketing - Angle Plate Bolt Hole Counterbores)
M6 T3
M03 S427
G00 Z2.0000
X2.0277 Y6.7055
G01 Z0.0250 F1.5
G17
G03 X2.1750 Y6.8125 Z-0.1250 I0.0348 J0.1070 K0.5000 F6.0
X2.1731 Y6.8332 I-0.1125 J0.0000 Q0.1562
X1.9519 Y6.7918 I-0.1106 J-0.0207
X2.1731 Y6.8332 I0.1106 J0.0207
G01 X2.0624 Y6.7001
G03 X2.1750 Y6.8125 Z-0.2500 I0.0001 J0.1124 K0.5000
X2.1731 Y6.8332 I-0.1125 J0.0000 Q0.1562
X1.9519 Y6.7918 I-0.1106 J-0.0207
X2.1731 Y6.8332 I0.1106 J0.0207
G01 X2.0624 Y6.7001
G03X2.1750Y6.8125Z-0.3750I0.0001J0.1124K0.5000
X2.1731Y6.8332I-0.1125J0.0000Q0.1562
X1.9519Y6.7918I-0.1106J-0.0207
X2.1731Y6.8332I0.1106J0.0207
G01 X2.0625 Y6.8125
G00 Z2.0000
X2.0277 Y5.7055
G01 Z0.0250 F1.5
G03X2.1750Y5.8125Z-0.1250I0.0348J0.1070K0.5000 F6.0
X2.1731Y5.8332I-0.1125J0.0000Q0.1562
X1.9519Y5.7918I-0.1106J-0.0207
X2.1731Y5.8332I0.1106J0.0207
G01 X2.0624 Y5.7001
G03X2.1750Y5.8125Z-0.2500I0.0001J0.1124K0.5000
X2.1731Y5.8332I-0.1125J0.0000Q0.1562
X1.9519Y5.7918I-0.1106J-0.0207
X2.1731Y5.8332I0.1106J0.0207
G01 X2.0624 Y5.7001
G03X2.1750Y5.8125Z-0.3750I0.0001J0.1124K0.5000
X2.1731Y5.8332I-0.1125J0.0000Q0.1562
X1.9519Y5.7918I-0.1106J-0.0207
X2.1731Y5.8332I0.1106J0.0207
G01 X2.0625 Y5.8125
G00 Z2.0000
X2.0277 Y2.7055
G01 Z0.0250 F1.5
G03X2.1750Y2.8125Z-0.1250I0.0348J0.1070K0.5000 F6.0
X2.1731Y2.8332I-0.1125J0.0000Q0.1562
X1.9519Y2.7918I-0.1106J-0.0207
X2.1731Y2.8332I0.1106J0.0207
G01 X2.0624 Y2.7001
G03X2.1750Y2.8125Z-0.2500I0.0001J0.1124K0.5000
X2.1731Y2.8332I-0.1125J0.0000Q0.1562
X1.9519Y2.7918I-0.1106J-0.0207
X2.1731Y2.8332I0.1106J0.0207
G01 X2.0624 Y2.7001
G03X2.1750Y2.8125Z-0.3750I0.0001J0.1124K0.5000
X2.1731Y2.8332I-0.1125J0.0000Q0.1562
X1.9519Y2.7918I-0.1106J-0.0207
X2.1731Y2.8332I0.1106J0.0207
G01 X2.0625 Y2.8125
G00 Z2.0000
X2.0277 Y1.7055
G01 Z0.0250 F1.5
G03X2.1750Y1.8125Z-0.1250I0.0348J0.1070K0.5000 F6.0
X2.1731Y1.8332I-0.1125J0.0000Q0.1562
X1.9519Y1.7918I-0.1106J-0.0207
X2.1731Y1.8332I0.1106J0.0207
G01 X2.0624 Y1.7001
G03X2.1750Y1.8125Z-0.2500I0.0001J0.1124K0.5000
X2.1731Y1.8332I-0.1125J0.0000Q0.1562
X1.9519Y1.7918I-0.1106J-0.0207
X2.1731Y1.8332I0.1106J0.0207
G01 X2.0624 Y1.7001
G03X2.1750Y1.8125Z-0.3750I0.0001J0.1124K0.5000
X2.1731Y1.8332I-0.1125J0.0000Q0.1562
X1.9519Y1.7918I-0.1106J-0.0207
X2.1731Y1.8332I0.1106J0.0207
G01 X2.0625 Y1.8125
G00 Z2.0000
X6.5277 Y6.7055
G01 Z0.0250 F1.5
G03X6.6750Y6.8125Z-0.1250I0.0348J0.1070K0.5000 F6.0
X6.6731Y6.8332I-0.1125J0.0000Q0.1562
X6.4519Y6.7918I-0.1106J-0.0207
X6.6731Y6.8332I0.1106J0.0207
G01 X6.5624 Y6.7001
G03X6.6750Y6.8125Z-0.2500I0.0001J0.1124K0.5000
X6.6731Y6.8332I-0.1125J0.0000Q0.1562
X6.4519Y6.7918I-0.1106J-0.0207
X6.6731Y6.8332I0.1106J0.0207
G01 X6.5624 Y6.7001
G03X6.6750Y6.8125Z-0.3750I0.0001J0.1124K0.5000
X6.6731Y6.8332I-0.1125J0.0000Q0.1562
X6.4519Y6.7918I-0.1106J-0.0207
X6.6731Y6.8332I0.1106J0.0207
G01 X6.5625 Y6.8125
G00 Z2.0000
X6.5277 Y5.7055
G01 Z0.0250 F1.5
G03X6.6750Y5.8125Z-0.1250I0.0348J0.1070K0.5000 F6.0
X6.6731Y5.8332I-0.1125J0.0000Q0.1562
X6.4519Y5.7918I-0.1106J-0.0207
X6.6731Y5.8332I0.1106J0.0207
G01 X6.5624 Y5.7001
G03X6.6750Y5.8125Z-0.2500I0.0001J0.1124K0.5000
X6.6731Y5.8332I-0.1125J0.0000Q0.1562
X6.4519Y5.7918I-0.1106J-0.0207
X6.6731Y5.8332I0.1106J0.0207
G01 X6.5624 Y5.7001
G03X6.6750Y5.8125Z-0.3750I0.0001J0.1124K0.5000
X6.6731Y5.8332I-0.1125J0.0000Q0.1562
X6.4519Y5.7918I-0.1106J-0.0207
X6.6731Y5.8332I0.1106J0.0207
G01 X6.5625 Y5.8125
G00 Z2.0000
X6.5277 Y2.7055
G01 Z0.0250 F1.5
G03X6.6750Y2.8125Z-0.1250I0.0348J0.1070K0.5000 F6.0
X6.6731Y2.8332I-0.1125J0.0000Q0.1562
X6.4519Y2.7918I-0.1106J-0.0207
X6.6731Y2.8332I0.1106J0.0207
G01 X6.5624 Y2.7001
G03X6.6750Y2.8125Z-0.2500I0.0001J0.1124K0.5000
X6.6731Y2.8332I-0.1125J0.0000Q0.1562
X6.4519Y2.7918I-0.1106J-0.0207
X6.6731Y2.8332I0.1106J0.0207
G01 X6.5624 Y2.7001
G03X6.6750Y2.8125Z-0.3750I0.0001J0.1124K0.5000
X6.6731Y2.8332I-0.1125J0.0000Q0.1562
X6.4519Y2.7918I-0.1106J-0.0207
X6.6731Y2.8332I0.1106J0.0207
G01 X6.5625 Y2.8125
G00 Z2.0000
X6.5277 Y1.7055
G01 Z0.0250 F1.5
G03X6.6750Y1.8125Z-0.1250I0.0348J0.1070K0.5000 F6.0
X6.6731Y1.8332I-0.1125J0.0000Q0.1562
X6.4519Y1.7918I-0.1106J-0.0207
X6.6731Y1.8332I0.1106J0.0207
G01 X6.5624 Y1.7001
G03X6.6750Y1.8125Z-0.2500I0.0001J0.1124K0.5000
X6.6731Y1.8332I-0.1125J0.0000Q0.1562
X6.4519Y1.7918I-0.1106J-0.0207
X6.6731Y1.8332I0.1106J0.0207
G01 X6.5624 Y1.7001
G03X6.6750Y1.8125Z-0.3750I0.0001J0.1124K0.5000
X6.6731Y1.8332I-0.1125J0.0000Q0.1562
X6.4519Y1.7918I-0.1106J-0.0207
X6.6731Y1.8332I0.1106J0.0207
G01 X6.5625 Y1.8125
G00 Z2.0000
M5 M9
M30

[ger21]

Post error. K is used when cutting arcs in vertical planes.