The control box has been turned on for the first time today and all was going well. The home made psu is outputting 72.5v and after connecting it upto the drives all come on bar one. The fuse had blown 4a fast blow glass type, all wiring and setting are identical in each drive.

Is this a faulty drive or if the stepper has been wired incorrectly would it blow the fuse?

Was looking forward to seeing it finally move after a year but will have to wait a few more hours!