Shapeoko 3 XXL - Issues with X axis stepper motor


Recently got around to assembling my shapeoko3 XXL i ordered when it was first announced (life got in the way) and have been calibrating and upgrading it recently. Ive discovered that the stepper motor along the X axis is not providing enough resistance such that I am able to physically move the x axis gantry easily while the shapeoko is powered on.

I’ve tuned all the belts to 100hz tension and tightened the v wheels as best I can which leads me to believe the issue with the motor. It’s causing it to move about 0.5-1mm off each time along the x axis leading to uneven side cuts and wrong plotting. I’ve attached some photos of final result. This was after I installed the bitzero and bitsetter today but the problem has been present since earlier.


Hey Shoon! Welcome!

Check out your Pulley Grub Screws.

Let us know if that helps; it is a common issue/solution.

1 Like

Yup having done more googling and less panicking ive discovered that one of the tiny screws holding the pulley shaft to the motor is missing. Now i need to find a shop in my country that sells such a tiny screw. I’m open to suggestions (as long as it has international shipping).

Shoot a mail to and they will sort you out.


The screws are standard M3 set screws — any decent hardware store should have them, or you can use an M3 SHCS of suitable length (8–10mm) — but as noted, contact support and we’ll get it sorted out.

Ok that’s good to know. I managed to get both an m3 10 and m3 8 but are both screw head rather than the hex that the shapeoko came with. Hopefully those should work


They will…

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.