Re: slo-syn motor frustration, can someone help?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Robert Hanford" <pomnept@xxxxxxxxxxx>

Hi Paul. Not exactly a circuit board, just a high wattage 400 ohm 
resistor, and 3uf capacitor. Yes there are SS relays. I opened the 
original slo-syn motor and a winding is burned. What  puzzles me is 
that my replacement motor is twice the length. I am wondering if they 
ever made them with the R/C circuit in the motor itself as it seems 
to run well at low voltage (I am afraid to crank it up to 115 yet) 
without a capacitor and resistor. Any ideas? Internet research is 
going slow because I can mostly get info only about modern models.
Sincerely,
Robert

> Original poster: "Paul" <marlow@xxxxxxxxxxxx>
>
> Did this unit come with a circuit board with some solid state relays for
> switching directions mounted near the motor?
>
> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Thursday, August 11, 2005 1:08 PM
> To: tesla@xxxxxxxxxx
> Subject: slo-syn motor frustration, can someone help?
>
> Original poster: "Robert Hanford" <pomnept@xxxxxxxxxxx>
>
> Hi All
> I recently bought a great old 220v variac and it came with a slo-sync
> motor to move the wiper. It was working nicely until one day it
> (the motor) started just sort of trembling. I changed the 3u cap with
> no luck and feeling that a winding was probably burnt out I found one
> that is similar in all respects on e-bay, except that it is about
> twice as long! It sort of works with a stuttering shuffling action
> and I am thinking and hoping that maybe with a different cap/resistor
> set up it might work.However being the incompetent person I am I was
> hoping for some feedback on this before I do anything stupid! Replies
> much appreciated.
> Robert Hanford