Guys, I have a feeling my 3 Phase Brook Crompton motor is slowly dying on my Harrison M250. The lathes started bogging down even with lighter cuts, it slows down when on automatic feed. I'm running it through a VFD on single phase, checked the lathe mechanically everything seems in good order. its been great up until this week but now there is a definite lack of grunt. Before I start pulling the motor out, is there any clever way to diagnose motor issues across the input leads?