peter d
Senior Member
- Location
- New England
My dad purchased a small bench sized milling machine for making small parts. It's a Micro-Mark, not sure of the model. It's a variable speed model with an electronic power supply.
Anyway, I assemble all the controls and fire it up. The unit runs fine until about 10% speed on the controller, then it trips the Square D QO GFCI breaker. I'm thinking that the power supply is creating a lot of harmonics and other dirty power that is causing the GFCI to trip. Your thoughts?
Anyway, I assemble all the controls and fire it up. The unit runs fine until about 10% speed on the controller, then it trips the Square D QO GFCI breaker. I'm thinking that the power supply is creating a lot of harmonics and other dirty power that is causing the GFCI to trip. Your thoughts?