Also probably a good idea to check that there is continuity between the machine's body and the plug's ground, and that the body is isolated from both of the hot and neutral leads.
Another possibility would be EMI going back to the panel from the motor controller. This is a major issue with VFDs but I don't know for sure about the DC controllers. Are the gfi for the kitchen and the machine physically close together? Are they on the same side of the 220 coming in to the panel?
Bill
Hi folks. I have just joined this group my name is Dennis. I just purchased a Harbor Freight mini mill three days ago from Tried and True Tools in Fridley Minnesota. It is used but looks like new. I have used a mini lathe for a couple of years and thought it about time to get a mill too. I have a problem that seems unusual to me any way. I tried a few simple cuts the first two days while waiting for some tooling and accessories from Little Machine Shop to arrive and everything was fine. But today while running the mill a circuit breaker kept tripping. But not on the circuit that the mill is on but one of the kitchen circuits. The circuit in my shop that the mill was running on never tripped. I unplugged everything that was on the kitchen line except the refrigerator and the breaker tripped only when the mill was running. The mill has been unplugged now for several hours and the kitchen breaker has not tripped. Does anyone have any idea as to what might be happening?
Dennis
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