Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: SROPLASMA on January 24, 2023, 08:18:49 PM

Title: Can't move Z Axis in positive direction
Post by: SROPLASMA on January 24, 2023, 08:18:49 PM

Hi there,
I am working on setting up Mach 3 on a 3 axis plasma cutter.  Everything is working fine except for the Z axis.  It will only move in the negative direction.  This includes both jogging and MDI moves.  The X and Y axes work fine in both directions.  Soft limits are temporarily set to 0 min and 0 max for all three axes so I don't think that is the problem.  I have tried two different stepper drivers and two different stepper motors on the Z with no luck.  Could I be missing something in the configurations?  Any help would be appreciated.  Thanks, Steve

Title: Re: Can't move Z Axis in positive direction
Post by: SROPLASMA on January 24, 2023, 10:13:58 PM

To clarify, if the motor coil wiring is swapped, the Z axis will only move in the up direction.

Title: Re: Can't move Z Axis in positive direction
Post by: JohnHaine on January 25, 2023, 04:48:31 AM

This problem can be caused by either the direction connection to the driver missing or possibly the direction signal pulse edge timing relative to the step pulse being wrong.

Title: Re: Can't move Z Axis in positive direction
Post by: SROPLASMA on January 25, 2023, 09:09:05 AM

Thanks for the response.  Hardware issue.  I tried a third stepper controller and that worked.  Thanks again.

Title: Re: Can't move Z Axis in positive direction
Post by: JohnHaine on January 25, 2023, 09:29:38 AM

Excellent.