Quote Originally Posted by Richard View Post
I had a single phase 2.2kw motor handy...

Do you think I'll see the lumpy torque in the surface finish?
You'll have to wait and see, you don't have the rubber mounts normally associated with single phase machines, they help significantly in smoothing out the bumps in the torque output.
I noticed a significant improvement in surface finish when I converted my Myford Super 7 to 3 phase, I would never go back to single phase for a lathe or mill,
Regards,
Nick