[topgraver]

I encountered a problem while using the G76 Threading Cycle. My test gcode is as follows:
G0 Z0.0 X 0.0
G76 P1.5 Z-10 I-0.5 J0.1 K0.3
M30
When I ran the program, the software interface did show both X and Z axis movement. But on the actual machine, the Z axis is not moving.
I can confirm the Z axis is not moving only during the G76 cycle. I can jog and input Z axis movement code into MDI and the Z axis move just as fine.
I also tried the G33, the Z axis also moved as intended.
Could anyone help me with this issue? Thanks in advance.

Regards,
Pengjin

[PlanetCNC]

Your G76 line expands to:

G21 G90 G91.1 G94
G00 X0.200000 Z0.000000 (back)
G00 X-0.600000 Z0.000000 (in)
M50P0
G33 Z-10.000000 K1.500000 (over)
G00 X0.200000 (out)
M50P1
G00 X0.100000 Z0.000000 (back)
G00 X-0.700000 Z0.000000 (in)
M50P0
G33 Z-10.000000 K1.500000 (over)
G00 X0.100000 (out)
M50P1
G00 X0.000000 Z0.000000 (back)
G00 X-0.800000 Z0.000000 (in)
M50P0
G33 Z-10.000000 K1.500000 (over)
G00 X0.000000 (out)
M50P1
G00 X0.000000 Y0.000000 (EndPos)

[topgraver]

I found the problem, it seems the wiring only works for common cathode. If it is wired as common anode, the axis will sometimes glitch. Not sure if it is a bug of the old board, found on two of my Mk2 board with TB6600 motor driver.

[PlanetCNC]

You probably forget to invert axis output. When wiring is changed so is polarity. And most drivers don't like this.