A VFD converts single phase power to 3 phase power so the motor will work on single phase power sources. You have single phase power in your house. 3 phase power is usually in commercial buildings using large machinery, but back in the day when this lathe was built, 3 phase was pretty easy to get, so most commercial machinery was powered by 3 phase. Also, with a VFD, you will have variable speed without having to change pulleys, and also forward/reverse and quick stop. ............ NubsWhat is a " VFD"?
Told ya i was a greenhorn lol