I bought a Grizzly G0766 wood lathe new. I recently had an issue with the rpm readout showing 1/.3 the normal speed. So on the slower speed belt, I should get 100 -1200 RPMs. I get a readout of 30-410. I have been going back and forth with Grizzly tech support on it and we are all scratching our heads. They sent a new potentiometer, I installed it...no change. They sent a new inverter, I installed it...no change. They sent the manual for the inverter and an email with the pages marked to show what the settings are supposed to be so I can check them, I checked them...they are correct and no change. Then yesterday and again today, while turning on the high range at mid speed (guessing), I made a few cuts, turned the lathe off to check my work, and the lathe would not come back on without waiting for a while. The error code suggests a too high voltage at high speed. But the lathe has been operational for a while with no problems.
So my question is...has anyone had any issues like this and what was the outcome or answer to the riddle.
Incidently, the lathe worked perfectly when I first got it then developed these weird problems.