Electronics Forum | Fri Jul 18 16:04:31 EDT 2014 | comatose
We had this. The anti-backlash nuts were binding. We took them apart, chased the threads with a tap and re-assembled with slightly less pre-load. Hasn't been a problem since.
Electronics Forum | Mon Jul 21 11:01:11 EDT 2014 | dontfeedphils
I dealt with the same issue for a month or so. We jumped through a lot of hoops, replaced both lead screws, verified the motor was good, a ton of stuff. Ended up being an intermittent wire connection between the control board and the conveyor width