Right side of laser gantry moving too fast

hi everyone. when i’m using the pass thru and the laser goes to align the second cut the right side of the traveling arm moves too fast (or the left too slow…) and jumps the track getting cockeyed. not all the time but its troubling. ideas? thanks

That’s got nothing to do with pass-thru, both stepper motors are driven as one. Either a bad motor, or the head is impacting material.


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