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engineguy
in reply to: jscott6SWZG

@jscott6SWZG 

 

Below is a snippet of code from your Contour 9 with the "Alloiw Helical Moves" turned on using the grbl Post Processor, you will see that there are no Y moves, there are G2 and G3 commands, the G2 command use the "I" which is an "Incremental Arc" around the axis, in the code you will see that the "I" position is a constant 7.175 and goes from -7.175 to +7.175 which is a 180degree arc so as far as I can see the grbl PP with the "Allow Helical Moves" option turned on is producing both G2 and G3 commands.

Should work :slightly_smiling_face: :slightly_smiling_face: :slightly_smiling_face:

(2D Contour9)
M9
T2 M6
S27000 M3
G54
G0 X17.68 Y8.085
Z15.225
Z5.225
G1 Z1.36 F508
G18 G3 X17.045 Z0.725 I-0.635 F990.6
G1 X16.41
G17 G3 X15.775 Y7.45 J-0.635
G2 X1.425 Z0.475 I-7.175 F508  G2 command on this line, will not change until there is G0, G1, G3 command, it is "Modal"
X15.775 Z0.225 I7.175
X1.425 Z-0.025 I-7.175
X15.775 Z-0.275 I7.175
X1.425 I-7.175
X15.775 I7.175  See these moves going + and - through 180 degrees
X1.425 Z-0.525 I-7.175
X15.775 Z-0.775 I7.175
X1.425 I-7.175
X15.775 I7.175
X1.425 Z-1.025 I-7.175
X15.775 Z-1.275 I7.175
X1.425 I-7.175
X15.775 I7.175
X1.425 Z-1.525 I-7.175

 

 

Hope the above is of some help :slightly_smiling_face: :slightly_smiling_face: :slightly_smiling_face: