u/remakker

My cheap Chinese bandsaw is a bit broke. The speed controller sometimes goes fast, slow and completely off all within 30 seconds.

I want to remove or replace the speedcontroller. I assume this is a universal motor (it has brushes and runs on ac).
It also has some “amperomatic circuit breaker” which also might be the issue. If this can be identified, is shorting it also possible?

If I just remove the speedcontroller, the motor only vibrates, so the circuit has some kind of starter.