This happened right in the middle of a project. Without making any adjustments, I went to turn on the switch. The motor hummed for about 1 to 2 seconds when turned on then the fuse on power strip pops. The shaft never turns on its own.
I disassembled the head stock and removed the motor completely.
Since new capacitors are only about $7, I went ahead and replaced it. Still no go.
The motor turns by hand freely, with no binding or scraping sounds. The bearings feel fine and the pulley shivs do not contact the motor housing. I can hear the motor TRY and turn, but nothing.
I don't see any external relays and such. Are they internal to the motor?
What should be my next course of action. Thanks, all!