Quote Originally Posted by dazp1976 View Post
It is my understanding that another option is you can run 2 steppers from a siingle driver as long as you follow ohms law.
So example if you have 2 steppers rated at 4A, you can safely run both together using a 8A capable driver so you can up the running voltage Thus only needing to use one axis output from controller.
Not a good idea because while the drive can handle the loads they can't handle other aspects of driving the motor like resonance compensation, the drive doesn't and can't know which motor is causing resonance so, therefore, can't apply any correction to the correct motor, also the correction applied would be all wrong because it's getting mixed signals. The upshot is a very rough running motor's.