I was sitting in front of my Arrow 750 the other day, deburring a part, when the external regen resistor burst into flames. I quickly hit the emergency stop and the flames died down and the resistor cooled off.

The next day I was able to make the spindle do its thing. i.e. spin and stop as it should, but when the machine was sat idle the regen resistor would then start to overheat again.

Please help me Cincinnati brain trust!