Did you check the current setting?
Stepper motors can jam, and the windings can go open-circuit. There is not much else that can go wrong with them. If you can turn the motor easily in both directions when the current is off, then it is not jammed. You can check that the windings have the correct resistance with a multimeter. Of course, it's also possible that the fault is in the cable.
Stepper motors can jam, and the windings can go open-circuit. There is not much else that can go wrong with them. If you can turn the motor easily in both directions when the current is off, then it is not jammed. You can check that the windings have the correct resistance with a multimeter. Of course, it's also possible that the fault is in the cable.