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Solved. If it helps others, we lost a 3rd 3 phase leg and it caused the transfer switch to trip that controls power to the hydraulic power unit. Found it and rest...all is good.

Yes I've looked at the previous posts about issues others have had with these. However we must still be missing something... We are turning some large diameter tubes that require a tailstock. ...

Figured i'd post a follow up. Thanks Tristar cnc for the diagnosis. It was indeed one of the Servo Amplifiers that went bad. Boss opted to go with a used one I'd found and it worked great! All...