I did my first boot up of the robot yesterday. Nearly everything was fine. The limit switches checked out. The encoders were reading. And all the motors could be jogged with the exception of J4. That one makes a small noise but doesn't move. I've verified that the belt isn't too tight. There is no difficulty turning that axis when it is not powered. So there doesn't seem to be anything mechanical holding it from rotating. We checked the motor cables (swapped a working one and it didn't make a difference). And we've used a multimeter to verify the wiring between the controller and the motor. However, early on we noticed some poor soldering of that motor cable. We mistakenly may have shorted across two of the four motor wires. We are wondering if that could have damaged the motor. Is it possible to damage anything in the motor with a faulty soldered connection? Can you suggest a way we can test this?
If necessary I can order a replacement motor and encoder. Can I do this directly from StepperOnline. If so can you suggest a part number. When I search for it I get the page for the entire kit.