900 Nova Foot Controller - Replace Carbon Pins

[@mepnel]

Excellent job. This is such a useful video. I’ve repaired one of these before and I like to watch a video beforehand to refresh my memory. 👍👍

[@Huckleberry500]

I have this same pedal that was intermittently working but doesn't work at all now. I have tested all the wires for resistance, they seem fine. I have tested the micro switch, it seems fine. I pulled the carbon pins out and both are broken in half. They were touching the plate but hoping that is the problem. Just ordered some, thanks for the video.

[@200shoes]

What problem does the worn carbon pins create? My Nova has no speed control, it’s all or nothing. Wondering if checking and changing the carbon pins in my foot control would fix my issue.

[@sewrepair]

If it's all or nothing it usually is the triac on the motor controller PCB in the machine. You can test if it is the carbon pins by removing them, assemble the foot controller, and test it. If it runs on max speed it is the triac.