> "Richard W. Schauer" <rws_at_enteract.com> wrote:
> > I've recently acquired an RP06 as part of a PDP-11/44 system, and I wish
> > to run it (why not?) I remember reading on this list a while back, that
> > it could be operated on single-phase power instead of three-phase.
>
> Not likely.
Actually it doesn't use the three phases... just the first two.
The third is routed out to allow daisy chaining two drives together
with power being routed out of the drive with the phases swapped
for load equalization.
>
> > I got a printset along with the drive, and it's pretty unclear about
> > what would use the three-phase- it's almost like the third phase is
> > ignored, the 208v between the first two phases is fed to the
> > transformer, and the primary is sort-of center tapped to feed the 115
> > volt fans. Is this right? How would I go about feeding it
> > single-phase if that isn't right?
>
> Sounds like you're looking for the printset for the electronics.
> The drive uses a three-phase motor. Some people have suggested using
> a capacitor-start arrangement to run it without three-phase, but I'm
> very skeptical that it would work well.
>
Nope... THE RP04 is three phase motor RP04-II (renamed RP05) and RP06
do not use a three phase motor... they use two phases.
The prints (and DEC RP06 training) do not lie.
Bill
--
bpechter_at_monmouth.com | FreeBSD since 1.0.2, Linux since 0.99.10
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| Windows System Administration: "Magical Misery Tour
Received on Wed Oct 25 2000 - 07:19:02 BST