Hi guys, I have a new trm with a 4000 rpm spindle running single phase in my garage. Today when I was cutting some allum the spindle started to wander about 40 to 60 rpm. It would go from 3300 to 3350 or 3270 (roughly). When I would chenge the spindle spped on the knob it would do the same at the new speed +- 40 to 60. when I ran it at 4000 (with the knob) it seemed solid. what would cause this. Could it just be a voltage surge or something (seperate from my machine) The x and y axis were running fine
Mark