Re: Motorized Variac question . . .

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

Original poster: "Crow Leader by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla-at-lists.symmetric-dot-net>

If by chance you have the really cheap ebay special "180 volt" Staco units
with a small maxon motor keep the following in mind.

- you must use less than 12 volts. 12 volts is way too fast and you have no
control
- the backlash is really high on them because of the stupid choice of shaft
couplers. I found mine only useful at 2-3 volts.

that aside it was not a bad deal on a large variable autoformer.

KEN

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, September 17, 2002 1:22 PM
Subject: Motorized Variac question . . .


> Original poster: "Mccauley, Daniel H by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>
>
>
> I bought a used 120VAC, 20A motorized variac which I plan on using in my
> power controller.  The motor runs off of 12VDC.  Just had a few questions
as
> I have not dealt with these motorized variacs before:
>
> 1.  I assume if I put +12VDC/Gnd into the motor for one direction and
> Gnd/+12VDC into the motor for the opposite direction?  Is this correct????
>
> 2.  Do these motorized variacs have mechanical limits on them, or do I
risk
> damaging the variac and/or motor if I continue to run the motor once a
> variac limit has been met???
>
> Thanks
>
> Dan
>
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