Quote Originally Posted by pudzian View Post
The CNC driver arrived in such a bad shape ( one corner partially smashed, full of dirt and some grease, broken screws and the parallel port was a little bent) that I'm affraid of power it on with my stepper motors so I want to make sure that I'm taking minimum risks of killing my steppers.

My stepper motors are NEMA 32 3.1Nm that will draw 2.1A in series (more info here: http://cnc4you.co.uk/resources/60BYGH301B.PDF ) and will be powered by a 24v 15A power supply.

Should I be worried?
If you are concerned, add a 2-3 amp fuse. It will protect the motors.

Do not use the series configuration. Use parallel. Moving torque is more useful than holding torque.