Any DVR XP owners experienced anything like this?

My Nova DVR XP shuts down while using a buffing wheel. I've not used a buffing wheel on this lathe before and generally I will use other motors but I tried it out and the lathe shuts down under load.


I removed the wheel and mounted a bowl blank and turned with no issues.


I unplug the lathe after use so the software settings would have been at the factory defaults. I'm wondering if the software thinks a load like this means something is wrong and if the setting need changing but I can't find a clear explanation of what the setting mean. What are PI Speed Control coefficients? What do the Kprop and Kint values mean?

I hope it's not a bad board - they're not cheap!