Hi, hope this forum is the correct place, if not pointers appreciated.

I bought this belt sharpener 20 years ago, and it came requiring a motor and controller. I bought whatever was suggested by the vendor (Lee Valley) and it was fine forever. But now it has stopped working, and my assumption is the controller. The motor seems bombproof and it has had very light duty.

Photos attached.

I’m out of my depth here. I’ve searched around and found 120V DC controllers, but they are all sorts and kinds. I also recall something about this motor having a tach and I see an extra pair of wires coming out of it. I would really appreciate a pointer of some type.

Thanks!