[TheForge] Phase Converters
Mike Spencer
[email protected]
Thu Mar 27 10:28:00 2003
> It is so simple and cheap to build your own rotary converter ( which
> does a better job) that unless you have a good reason, that is usually
> the best way to go.
I'm keeping this in mind for my air hammer restoration project, in
case the stationary engine doesn't work or proves to be too much
trouble. Presently I'm stalled trying to get the magneto working or
replaced.
> I, on the other hand, am brain diseased enough to spend the time
> putting disposable utility knife blades to a whetstone, so I have much
> more liberal definations of economy. Of course, as said before, my
> theory of recycling is to not throw it away in the first place. I
> figure if we keep going the way we are, my theory will come to the
> fore eventually.
Lots of my gear is so old that I figure I already have the very last
one of anything that's not in a museum or a private collection. :-)
> An AC split phase induction motor( the most common type)...
I've now got a 25# Jardine running from a 2HP 1725 rpm motor that has
brushes and a commutator. It's what the previous owner of the hammer
used but I never hooked it up because I already had a 3450 rpm motor,
transmission and jackshaft in place. Now I've eliminated the horribly
noisy transmission. How lovely and quiet!
And inquiry with my local motor rewinder shop -- one of the few
industrial shops closer than 75 miles -- clued me that I could reverse
the rotation direction by loosening a setscrew and aligning the
pointer with "the other" mark. Worked as predicted. How splendid!
I have the hammer running at 388 blows per minute. Haven't done any
real forging with it yet but it seems to behave properly. The
previous owner ran it way faster -- direct from the motor with no
intermediate shaft. Lessee...umm ... that would have been almost
twice as fast. It's a wonder he didn't trash the hammer but he
didn't.
- Mike
--
Michael Spencer Nova Scotia, Canada
[email protected]
http://home.tallships.ca/mspencer/