Re: SRSG - rotor attachment

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "seanick" <edgarsbat@xxxxxxxxxxx>

Hi Gerry,
The rotor I use is a 9" outer diameter 1/2" thick fiberglass circle, 
with holes cut in the sides,..here are a couple drawings of it:
http://www.themotocam.com/gallery2/main.php?g2_itemId=3802
http://www.themotocam.com/gallery2/main.php?g2_itemId=3806

I will take some pictures this weekend as well as some more video 
footage. Given the tuning problems I had been having and the way I 
fixed them, I expect at least twice, possibly three times the 
performance I had last time, this weekend. We will see though, theres 
always something...

Later
NICK

----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Wednesday, May 17, 2006 6:30 AM
Subject: Re: SRSG - rotor attachment


> Original poster: "Gerry  Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
>
> Hi Nick,
>
> Looks like the part will lock to the motor shaft just fine.  The OD 
> of the flange seems small to me.  What is the diameter of your rotor 
> and do you notice any problems with such a small flange???
>
> Gerry R.
>
> > Original poster: "seanick" <edgarsbat@xxxxxxxxxxx>
> >
> > I actually use a "Quick-Grip Keyless Bushing" that I ordered from 
> > E-Bay, but they have on page 964 of McMaster-Carr's catalog about 
> > halfway down the page. There was a discussion about them recently 
> > ("Tran-Torque GT") that prompted me to check them out and acquire 
> > one. Must say that it works quite well to press the rotor against 
> > the 1/2" axle (which I did acquire from McMaster-Carr) and a lot 
> > more uniform connection than I ever had on any of my previous gaps. 
> > Helps that my rotor was made on a CNC machine by a friend of mine too though.
> >
> > However I attempted to use a 1/2" universal joint socket to couple 
> > the shaft to the synchronous motor, and that appears to have too 
> > much play to allow my motor to synch anymore. I have a video of it 
> > online at 
> > http://video.google.com/videoplay?docid=-1595599978891904649, you 
> > can see the synch motor hunting. even though I was really happy to 
> > get it running since it gave an arc at the first time, it still 
> > needs tuning and I need to figure out the synch hunt problem. other 
> > than that though, the bushing works, its just the other parts of 
> > the rotary that are problematic.
> >
> > I will post more info about my spark gap in a separate thread, but 
> > as a starting point if you check out the video you see a wood box 
> > that houses the motor, and another motor/gearbox hanging off the 
> > side (Thanks Bart!) to turn the larger motor and thus adjust the 
> > phase, and beside it a plexi box with two bearings, an axle and the 
> > rotor connected using the keyless bushing.
> >
> > Tuning happens this weekend and given the long list of changes I 
> > need to make (some of them major, like the incorrect placement of a 
> > second static spark
> > gap, in series with the cap thus at least halving the efficiency) 
> > and the synch problem I will be able to get much better performance soon.
> >
> > NICK