Circles but not circles

[Gato Richy]

Hello everyone: I hope someone had the same problem or give me some hints.

I was putting off for so long. Circles are not really circles. As you can see in the pix. The head starts at 3 o'clock (0°) and when it gets to 6 o'clock, Y axle gets fixed 24° (of the circle). The same occurs when the head gets at 12 o'clock.

X and A axle are 1:2 reduced, Y and Z 1:1

Mach3 configs

X and A axle: (reduced 1:2)
Steps per 28.766
velocity mm's per min: 9000
accele 500
G's 0,051
step pulse 2
dir 2

For Y and Z
Steps per 14,383
velocity mm's per min: 9000
accele 500
G's 0,051
step pulse 2
dir 2

[Gerald D]

You built a CNC but not a MechMate

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