Re: sync motor :-( update_2

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Kidd6488-at-aol-dot-com>

In a message dated 7/28/01 11:16:56 PM Eastern Daylight Time, 
tesla-at-pupman-dot-com writes: 


>
> Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net> 
>
> Hi Jonathon, 
>
> At 10:27 PM 7/28/2001 -0400, you wrote: 
> >Hi again, 
> >      Ok, your replys on that cent. switch made a lot of sense to me. So I 
> >popped the motor apart again (after 6 times, one gets pretty good at it 
> :-\) 
> >and looked at the contacts on the motor, and the centrifical switch on the 
> >rotor. Both looked good, but I still cleaned them up. 
> >      Also, when taking the motor apart the first time, I noticed a seal 
> or 
> >something laying on my work area. I couldn't figure out where it went, so 
> I 
> >put it in the housing end, in what looked like a seal area. I guess it 
> didn't 
> >go there, because that was what was causing some of the heat, and -100 
> RPM. I 
> >know this because this last test, without the seal, didn't get hot, and 
> was 
> >clocked at 1725 RPM. 
>
> If this is a plastic ring, it could be part of the speed switch.  There is 
> sometimes a plastic ring between the rotating part and the fixed parts to 
> act as a wear surface or bearing surface between the parts. 



I don't think it is because it wasn't broken, or worn, it just was laying 
there. And the switch does work. 

>
> >      I know the switch is good, because I saw it spark as it kicked off. 
> >For those of you not keeping up, this motor has flats, yet is running at 
> 1725 
> >RPM (what it is rated at). 
>
> Oh!  That is a real good sign that it is working! 
>
> >      I also did the carboard circle thing with flourecent light, and it 
> is 
> >noticeably out of sync. Do I really need a variac to fine tune the 
> voltage? 
> >I'm not worried about phase shifting as of this point. I just want this 
> dang 
> >motor to run sync.... 
>
> Hmmmm.  It almost has to work.  I am running out of ideas here  0:=| 



People Have said use a variac. Is that necessary to get the voltage jsut 
right? Not for phase shifting, just to get it to sync. 

>
> >      Also, a couple questions: 
> >        
> >      1) would a 1/2" x 6" lexan rotor be ok? 
>
> Probably. 
>
> >      2) what can I do about excessive endplay? 
>
> I went to the "water faucet" section of the hardware store.  There are tons 
> of little rings, gaskets, and other nice things that could be used to shim 
> the shaft ends to remove the end play.  Today's faucets have hundreds of 
> parts and everyone makes their's different.  This provides many great 
> little parts at the hardware store. 
>
> >      3) what kind of supports should I use to hold the stationary 
> >electrodes? 
>
> Strong insulated ones :-) 
>
> > 
> >I'm sure this thread will live for a while  :-D 
>
> There may be a change the windings have a short in them somewhere or there 
> is some other defect in the motor.  Was the motor working well before you 
> started? 



Yes, I had plugged it in and it ran fine. I didn't check the RPMs when I did 
that, because I hadn't thought of modifying it then, just making a RSG (I was 
dumb then,and didn't know that ARSGs killed NSTs :-D ) 


>
> If it was not so heavy, you could ship it to me and I could take a look at 
> it.  I am very interested in finding what could be the problem here.  Sort 
> of a mystery... 



I know, I was hoping this would be easy... 

>
> Cheers, 
>     
>    Terry 





--------------------------------------- 
Jonathon Reinhart 
hot-streamer-dot-com/jonathon