I am moving into my new shop and am slowly moving equipment. When I set up my Oneway 1224 on a 120V circuit with a gfci, it would trip every time I started the lathe. I tried the lathe on 4 different circuits. I even changed out the breakers, still the lathe tripped the gfci. I finally had to remove the gfci from the circuit and the lathe ran fine. I would guess that there is something in the variable speed wiring that would cause this. Anyone have any thoughts on this?