Hi, I have a nema 17 attached to a mount running off of an arduino uno using a tb6600 stepper driver. The motor will operate just fine up to around 2400mm/m right up until I slide the t nuts of the mount into the aluminum extrusion frame, then I cant go above 500mm/m. I found that the motor is then conductive with the the frame, so I tried to ground the frame and that didnt work, however if I leave the mounting nuts loose the poor speed issue is spotty like it is dependent on the nuts being tight. I tried removing the nuts and just holding the motor attached to the mount up against and all around the frame with no issues. Tried different motor and driver. Only other thing I can think of is nylon screws and nuts. If anyone can give some advice it would be greatly appreciated.