Originally Posted by
Saltfever
Thanks for answering, Mark. I couldn't see the vacuum port holes (as well as the foam ring) so that is why I was confused. Where are the holes for the vacuum? I can see the plumbing but I can't see any holes in the base-plate slots . Also, all the holes you drilled did not go completely through the part because that would have created a vacuum leak, correct?
With that 25 mm wide belt under tension, I doubt the backlash is coming from it. As you say, it could be the stepper motor software issue.
THANKS for posting your design.