Voron 2.4 Z movement one motor out of sync

[kleslietx]

During my configuration on a Voron build using a duet 6HC with an expansion board. When I test the Z movement everything behaves as it should but as I either move up or down one of the motors is out of sync and doesn’t move as much as the other three motors. I’ve tried swapping motors I’ve tried moving that same motor to another driver and I get the same behavior can someone please look at my configuration file and see if I’ve got something that could be causing this?

I've attached a copy of my configuration as well as a video to help explain the problem. If I move much pass what is shown in the video the back left corner will be high and the front left will be low the two right side motors behave as expected.

These are LDO motors but I have swapped on motor to see if the behavior would change but everything remained the same.

IMG_1500 111.mp4

config.g

[rjenkinsgb]

@kleslietx
Try moving the Z drive mapping line to near the top of the config, just under the X & Y mapping line?

I don't know if that is a definite problem, but I can imagine other Z setup commands may not be interpreted correctly if the full mapping is not already defined when they are executed?

[Gixxerfast]

@kleslietx It's not unheard of that people have managed to use the wrong size pulley in the Z gearbox. Worth a check maybe.

[kleslietx]

@gixxerfast Thanks for the quick response. I did pull the bottom pulley system and counted each of the pulleys to validate that I didn't mix pulleys. I just did that today.