I was drilling some holes with my mill and got a nasty shock. Turns out there is 60+v flowing from the set screw on the potentiometer to the frame. Now the motor will not spin and I'm wondering how to trouble shoot.
1. there is still current running from the set screw on the speed control pot to the frame. Oddly it registered as 120 AC, then back to ~60v DC after cycling the safety switch.
2. Popping off the e-stop cover shows the green light iluminating. Fan in the control box spins up and a red LED iluminates inside the control box (you can see it through plastic).
3. hitting e-stop triggers amber light above stop button. Returning the pot to off resets amber light.
4. Fuse is un-blown and checks out via OHM test.
I really don't want to have to return this thing after cleaning it and tramming it in. Any ideas on how I can trouble shoot this? I peeked inside both boxes and there isn't anything obviously blown or loose. The big mosfets seem ok but I did not attempt to probe them.