I've got a Mori Seiki SL-1 Lathe that I've completely rebuilt with all new electronics. Works very well, but I was drilling at low RPMs today, 500 RPMs with a 3/8" Drill and the chuck definitely bogged down. I work with VFDs all the time, but don't know much about power and torque settings. I'm more used to dealing with settings for control and the like.I'm using a 7 1/2 HP 3PH Motor with a Huanyang 7.5kw VFD. I bought one for 10HP motor by accident and figured that a little bigger shouldn't be a problem.I went through the motor tuning section.I was wondering if anyone had any ideas of what I need to make the VFD work better at lower RPMs. I certainly have enough HP.