Hello All,

I have an issue that you may have the answer.

I am working to setup the A axis on my wood mill. I have the A axis motor steps to correctly turn 360 deg's. My A axis needs to run a 1000 inch per min and the X & Y run at 75 inch per min.

I can edit the gcode from:
( Rounding Toolpath2 )
( File created: Thursday November 23 2023 - 05:43 PM)
( for Mach4 from Vectric )
( Material Size)
( X= 2.000, Z= 0.600)
( Diameter = 1.2000 Inches)
( Y Values are wrapped around the X axis )
( Y Values are output as A )
()
(Toolpaths used in this file:)
(Rounding Toolpath)
(Tools used in this file: )
(108 = End Mill {0.2500 inch} Up)
N130 G00G20G17G90G40G49G80
N140 G70G91.1
N150 T108M06
M07
M08
N180 G00G43Z1.8939H108
N190 S21000M03
N200(Toolpath:- Rounding Toolpath)
N210()
N220 G94
N230 A0.0000 X0.0000 Z1.8939 F75.0000
N240 G00 X0.0000 A-360.0000 Z1.8839
N250 G1 X0.0000 A-360.0000 Z0.7419 F35.0000
N260 G1 X2.0000 A-360.0000 Z0.7419 F75.0000
N270 G1 X2.0000 A-351.6279 Z0.7419
N280 G1 X0.0000 A-351.6279 Z0.7419
N290 G1 X0.0000 A-343.2558 Z0.7419
N300 G1 X2.0000 A-343.2558 Z0.7419to:
( Rounding Toolpath )
( File created: Thursday November 23 2023 - 05:04 PM)
( for Mach4 from Vectric )
( Material Size)
( X= 2.000, Z= 0.600)
( Diameter = 1.2000 Inches)
( Y Values are wrapped around the X axis )
( Y Values are output as A )
()
(Toolpaths used in this file:)
(Rounding Toolpath)
(Tools used in this file: )
(108 = End Mill {0.2500 inch} Up)
N130 G00G20G17G90G40G49G80
N140 G70G91.1
N150 T108M06
M07
M08
N180 G00G43Z1.8939H108
N190 S21000M03
N200(Toolpath:- Rounding Toolpath)
N210()
N220 G94
N230 A0.0000 X0.0000 Z1.8939 F50.0
N240 G00 X0.0000 A-360.0000 Z1.8839
N250 G1 X0.0000 A-360.0000 Z0.7419 F35.0
N260 G1 X2.0000 A-360.0000 Z0.7419 F50.0
N270 G1 X2.0000 A-351.6279 Z0.7419 F1000.0
N280 G1 X0.0000 A-351.6279 Z0.7419 F50.0
N290 G1 X0.0000 A-343.2558 Z0.7419 F1000.0
N300 G1 X2.0000 A-343.2558 Z0.7419 F50.0
N310 G1 X2.0000 A-334.8837 Z0.7419 F1000.0
N320 G1 X0.0000 A-334.8837 Z0.7419 F50.0
N330 G1 X0.0000 A-326.5116 Z0.7419 F1000.0
N340 G1 X2.0000 A-326.5116 Z0.7419 F50.0

How and where do I adjust the A axis to match the 75 IPM?

Thanks Jim

Not quite sure just what you are hoping to achieve here but, from looking at your Vectric generated GCode, you must keep in mind that Mach will blend each axis federate so that they each arrive at the destination (specified in the line of GCode) at the same time.
If you try to speed up or slow down any one axis movement then it will affect the speed of the others so that they still all arrive at their destination at the same moment in time.

Tweakie.

Its worth noting that rotary units should be calibrated in steps per degree and NOT in steps per rotation as some teach.

Due to the large reduction ratio they will run much slower than a linear axis.

The maximum feed is calculated on the slowest axis and all axis are blended at this or a lower commanded feed.