Running a quick 5 min centerline carve, suddenly noticed the sound changed. Found machine running stopped in one place slightly above the board running at varying speeds. Slow and slower, no movement in any direction, approx 2/3 thru mpc. Would not stop with stop button, turned it off. Thought maybe the varying speed indicated a brush problem so I changed them. Found they were approx 1/2 length. Started same carve over again and all seemed well. Heard the machine slow down and run at a steady speed but not fast or under load. Found carve finished, truck homed but still running at low speed. Would not shut off with stop button. Used on/off switch to stop.
Removed board and did a second carve of the same mpc. Machine seemed ok, thought it sounded off but assumed it was just me being paranoid. Carve finished, went to remove the board and as I was cranking up the machine started running the cutter. Found that as I cranked up the cut motor would start in small spurts. Nothing when I cranked down.
Anybody have any ideas which wire could be pinched somewhere. Something has to be turning it on and I'm not familiar with the wiring/cabling to make an intelligent guess.
Appreciate any help,
Rick H