Hi,

I've just finished assembling the Y axis on my machine and the stepper is overheating after around 20 minutes of use and starts to stall. The coupler is really really hot to touch at this stage too so the heat is being transferred from the stepper shaft to the ball screw (not good).

The motor is a nema 34 and pretty beefy at 118mm in length.

I believe I have found the cause and wondered if anyone else has experienced this. I believe it to be the ballscrew as after close inspection it seems to be warped pretty badly, I'd say without putting the dial indicator on it, it's the best part of 1mm to 1.5mm snake warped and I think over a period of time it's causing the motor to work too hard and causes the overheat.

Just wondering anyone elses thoughts on this please?

Taking the mount ofnthe nut the Z runs smoothly along the Y axis with no resistance so my guess would be the ballscrew warp is the culprit.

Cheers everyone.

:wave: