Re: RSG motor

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

Original poster: "Luc by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ludev-at-videotron.ca>

Hi Gregory,

Bench grinder are not the best for variable speed because they
are induction motor design to keep around the same speed with
various load ( increasing current consumption with load )  you
are better to use universal motor for that ( grinder or other
tool motor, vacuum cleaner to ). But bench grinder make perfect
sync motor with little modification.

Cheers,

Luc Benard

Tesla list wrote:
> 
> Original poster: "Mr Gregory Peters by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <s371034-at-student.uq.edu.au>
> 
> Hello all,
> 
> I was considering using a bench grinder to drive my asynchronous rotary
> gap. I hooked mine up to a small variac, but can not get any
> significant speed fluctuation. Does anyone know how I could vary the
> speed? Would a light dimmer work? The motor is a 2850 rpm unit. I was
> contemplating using 12 electrodes for about 570 bps.
> 
> Cheers,
> 
> Greg Peters
> Department of Earth Sciences,
> University of Queensland, Australia
> Phone: 0402 841 677
> http://www.geocities-dot-com/gregjpeters