Quote Originally Posted by Ross77 View Post
Should steppers hum/crackle whilst holding? it only seems to happen on certain motor positions. It also gets worse/louder when I turn up the Vref to increase max current.

It also seems to buzz/miss steps at about 300 rpm, is that normal?

Steppers usually make their best noises when in action, on hold the current is usually cut because you don't need the pulling power.

300rpm is not bad for a stepper, but it isn't good either :nope: