Unfortunally the lathe is at a freinds workshop at the moment so I cant check model numbers ect. I just assumed that the Fanuc drives cant be used as I couldnt find any examlples of people doing it. Also they are 3 phase so I would still need a rotary converter.

in the documents it looks like the spindle VFD has already been changed for a Mitubishi 240v one, if so that takes care of the spindle so its only the servo drives that need to be changed to get it all on 240v.

Can I use DC servo drives on an AC motor?