Hi, great forum, I've been following for a while.. Im planning to upgrade my workbee 1510 with VFD. and I have a few question I try to figure it out. I have general question regarding VFD earth ground and NVUM ground. My concern is the VFD used earth ground and its connected to the body all the way to the tip of the bit, NVUM used the negative of the power supply to do z-probing (Mach3 active low). since those 2 unit used different kind of grounding, how can I do z-probing? sorry with my bad English... Thanks Yan
