Re: stepper motor not rotating
I have two suggestions for you:
1. Contact the people who sold you the driver for support
2. Don't buy cheap chinese crap.
Since I know neither of those will happen, manually connect the step signal to logic power and ground alternately. If the motor moves at all, then the problem is in the port. If it doesn't look for an enable pin on the driver or return the unit as defective.
James hosts the single best wiki page about steppers for CNC hobbyists on the net:
http://www.piclist.com/techref/io/steppers.htm Disagree? Tell him what's missing! ,o)