A tale of woe, including carelessness, stupidity and laziness....

Paul Koning paulkoning at comcast.net
Fri Aug 28 07:56:16 CDT 2015

> On Aug 27, 2015, at 7:13 PM, Michael Thompson <michael.99.thompson at gmail.com> wrote:
>> ...
>> In any case, RP06s use three phase power.  The issue wasn't the power in
>> this particular story, but rather the ground wire (the green "protective
>> ground" that isn't supposed to carry current at all under normal operation).
> Not exactly true. RP06 drives are typically connected to 3-phase power, but
> only use two of the three phases. I have and RP06 running at home on
> 110/220VAC 2-phase.

That's interesting.  I was told that an RP06 requires attention to the correct phase connections or it will attempt to spin in the wrong direction, implying that it uses a 3 phase spindle motor.  Or perhaps that was a different RPnn?  Or perhaps it was simply an urban legend?


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