On 2015-08-28 14:56, Paul Koning wrote:
On Aug 27, 2015, at 7:13 PM, Michael Thompson <michael.99.thomp...@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?
Paul, that was my belief as well. I knew the RP06 only used 2 out of the
3 phases, but I thought the motor was depending on them.
Anyway, I located the manual, and it turns out that the actual phases
are not important. Yes, it uses 2 phases, but only to get the proper
voltage (or so I gathered from the manual).
You can actually update the drive in the field to run on different types
of power sources. The only thing fixed is frequency, so you cannot move
from 50Hz to 60Hz or back easily.
Johnny
