Re: SRSG questions

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Finn Hammer by way of Terry Fritz <teslalist-at-qwest-dot-net>" <f-h-at-c.dk>

Complicated? well it isn`t, really. Only to describe in writing, like
the sound: waaauuuunnngg, waaauuuunnngg, waaauuuunnngg. It is really the
sound of the motor unloaded alternating with the motor loaded.

Anyway, the meter you need is a amperemeter, the old type. Not a digital
meter which don`t show tendency well, unlike the old fashioned meter
movement type.

Try this method! I promise you will get synchronous motor "under your
skin" this way.

Cheers, Finn Hammer

Tesla list skriver:
 >
 > Original poster: "Zagarus Rashkae by way of Terry Fritz 
<teslalist-at-qwest-dot-net>" <arbitrarily_random-at-yahoo-dot-com>
 >
 > --- Tesla list <tesla-at-pupman-dot-com> wrote:
 >  > Original poster: "Finn Hammer by way of Terry Fritz
 >  > <teslalist-at-qwest-dot-net>" <f-h-at-c.dk>
 >  >
 >  > Chris,
 >  >
 >  > Start the motor up with the disk attached, and
 >  > preferably with the
 >  > moving electrodes installed, using a variac and an
 >  > analogous
 >  > amperemeter.
 >  >
 >  > As the motor gains speed, the meter is going to show
 >  > variations in
 >  > current draw, this will be accompanied by sound from
 >  > the motor. This
 >  > behaviour is called hunting. You will recognize it
 >  > immediately when you
 >  > see/hear it. Increasing the voltage should produce
 >  > the effect that the
 >  > variation finally stops, and a steady current draw
 >  > results. This means
 >  > that the rotor has locked to the rotating field. It
 >  > has become
 >  > syncronous. If it does not lock in, take more off
 >  > the armature. If you
 >  > take too much off, don`t dispare, you just have to
 >  > run it at a lower
 >  > voltage, which means that the gap is going to need
 >  > it`s own variac.
 >
 > WOW! That sounds complicated. I don't want to spend
 > too much time on it, but if you say... I have access
 > to a variac and also a Scope-meter thingy. If the
 > variac is at max and the motor still doesn't sync
 > should I cut off some more material? If the sound
 > coming from the motor is smooth and I have flats cut
 > already am I okay or do I have to use a meter?