My AR3 has been working perfectly. Then one day, I clicked auto-calibrate, and the J4 axis just twisted around until the wires finally stopped it. It doesn't appear to have broken any wires.
I can manually jog any of the axis's now, but when I try individual joint calibration, it moves a short distance and stops. The message says successful calibration. I have checked voltage at the limit switches, and all switches are +5v when made, but 0v when not made. My understanding is they should be -5v when not made.
Any hints on where to start looking?