Quote Originally Posted by primorc20 View Post
Is this PM542 stepper driver? What voltage do you use?
If you're deciding which driver to buy then get the PM752. The higher voltage will make the motors run with higher torque at high speeds, and thus faster overall.

Currently I use the PM752 on 75v, though that should change in a few weeks when I've finished prototyping my 120v driver design...

I'm also using a 500VA transformer with 4 of the 3 N.m motors.