14-11-2013, 06:24 PM
Hi Col, yes my 10k pot gives stopped to full speed with full 270 deg rotation, but it is a ABB VFD. I take the point about not having an earth loop. I avoided this by using the screen of the VFD to motor cable to earth the lathe via the motor casing, with no other earth connected to the lathe. The screen braid is a very heavy tinned copper sheath over the cable, estimate about 4 sq mm. as the mains fuse is 5A, I think I,m about OK. Peter
