On 05/14/2015 07:53 AM, Tom Easterday wrote: > I also had a second problem where the VFD would shut down somewhat > randomly which I thought was related to this noise as well. That turned out > to be an over current condition at very low rpm. Tweaking some settings > fixed that. > > Yes, I had to turn off the electronic motor protection on my mill VFD, as it integrated an overtemp condition when doing rigid tapping. All those reverses added up. Since the Bridgeport motors are made for plug reversing when manual tapping all day long, I figure it can probably handle worse than the VFD could ever deliver.
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