27 Aug
2015
27 Aug
'15
4:13 p.m.
Date: Wed, 26 Aug 2015 15:33:19 -0400
From: Paul Koning <paulkoning at comcast.net>
Subject: Re: A tale of woe, including carelessness, stupidity
and laziness....
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.
--
Michael Thompson
Quite possibly two different phases, and if so,
the would be 90 degrees
out of phase with each other.
90? Three phase power is 120 degrees apart, center-tapped "two phase"
home power is 180 degrees, but I don't know of any power company service
that produces 90 degree shifts.
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).
paul
28 Aug
28 Aug
5:56 a.m.
On Aug 27, 2015, at 7:13 PM, Michael Thompson
<michael.99.thompson at gmail.com> wrote:
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
...
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. 
7:20 a.m.
On 2015-08-28 14:56, Paul Koning wrote:
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
On Aug 27, 2015, at 7:13 PM, Michael Thompson
<michael.99.thompson at gmail.com> wrote:
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? ...
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. from 50Hz to 60Hz or back easily.
Johnny
10:47 a.m.
On Fri, Aug 28, 2015 at 6:56 AM, Paul Koning <paulkoning at comcast.net> wrote:
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?
The RP06 spindle motor is a single-phase motor wired between two
phases of the 120/208 three-phase-wye input, so it nominally gets
208VAC, but the motor is rated to operate over a wide enough range
that 220-240V single phase will work fine.
3178
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