Quote Originally Posted by Jonathan View Post
I intended mounting the VFD there to be temporary, but now I'm thinking I might leave it since it saves on cable. The extra mass on the Z axis isn't much compared to what's already there. If I switch the steppers off the Z axis now drops due to gravity. Before the detent torque of the motor was sufficient to stop this.
I'd be more worried about the effect of vibration on the VFD.