In the cabinet I've noticed on the Spindle servo amplifier that lamp "FUSE OPEN" is on |
If this is the the lamp on the "Gold" servo amp..well it could be a 3ph power problems as Al has suggested but most likely the servo amp itself has a problem..or the spindle motor is shorted..
If the incoming voltages are correct, it could be the spindle motor got hot which could cause this also. Or over current, over voltage, or under current or under voltage.
There were two small "round" fusses on the old style drive cards, but not sure if there are the same on the new covered (gold) style cards..never had one go bad..