Since this lathe has a proprietary drive, you might want to look online and see if you can find a user site. I know there is one for the Powermatic 3520 and you can find a lot of info for that lathe there. The Nova has the drive contained in the headstock so you can't just switch out a bad motor or VFD like you could on other lathes. Hope it is one of those machines that keeps on ticking.
Roy G
Roy G