[Resolved] Set screws missing machine slipping

[BillJutz]

Make sure at least one of the screws is on the flat side of the shaft. If you don’t have a flat ground into the side like mine, then put one on there. See my other post.

Slipping pulleys - Solution

I’m new to the forum as I recently acquired my X-Carve. I used to own a Shopbot PRT-96 that had a heavy steel Y-Axis and Z-Axis gantry and used a 3 HP router for a spindle. The PRT-96 had stepper motors were keyed and used a rack and gear instead of a belt. When I was looking at the Pulley connection on the X-Carve Stepper Motors, I was surprised to see that the shaft was smooth and didn’t have a key or at the very least a flat spot on the shaft. Stepper Motors create a lot of torque. To test …