Re: Problems with SRSG on TC

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

Original poster: "Barton B. Anderson by way of Terry Fritz <teslalist-at-qwest-dot-net>" <classictesla-at-netzero-dot-com>

Hi Chris,

total gap is .7 or .07? (the " .35 on each side" threw me off as it could 
go either way = really narrow or really wide).

If 0.7, then it may very well be too wide. We typically run narrow gap 
spacing (but not as narrow as 0.035" per side). I run approximately 0.1 to 
0.12 on each side of the gap (1/4" or less total gap). The phasing is 
intertwined. If you have no way of measuring, trial and error will work 
(moving disk on motor shaft in say 5 degree increments).

Take care,
Bart

Tesla list wrote:

>Original poster: "Zagarus Rashkae by way of Terry Fritz 
><teslalist-at-qwest-dot-net>" <arbitrarily_random-at-yahoo-dot-com>
>
>The total gap is maybe .07 inches, .35 or so on each side. I don't think 
>that is the problem as the TC "off" time is 10 seconds or so, then 5 
>seconds of operation, etc...
>
>Regards,
>
>Chris
>
>Tesla list <tesla-at-pupman-dot-com> wrote:
>Original poster: "Barton B. Anderson by way of Terry Fritz "
>
>Hi Chris,
>
>How wide is the RSG gap (stationary to rotating)? If it's too wide, your
>cap may be firing at too high a voltage and somewhat randomly along the RSG
>path. If a firing is missed, the cap "may" continue to charge to a higher
>voltage if the transformer is capable. This relates to the RSG firing
>intermittently (not at the 240 BPS you may assume it is) and often leads to
>the safety gap firing intermittently. BTW, at 240 BPS, phase off-peak about
>23 degrees. (where voltage and current curves cross).
>
>Take care,
>Bart
>
>Tesla list wrote:
>
> >Original poster: "Zagarus Rashkae by way of Terry Fritz
> >"
> >
> >Hi Steve, All,
> >
> >I did m! odify the motor so that it was synchronous
> >without the disk, I don't know what it is with the
> >disk and electrodes. I am running at 240bps or 2
> >breaks per half cycle so I don't know why losing sync
> >would make the TC perform like that.
> >
> >I have 2 saftey gaps, one across the cap and one
> >across the transformer. The transformer one is in
> >parallel with the SRSG, so I think it's okay. Both
> >gaps are set to around 15-20kV.
> >
> >Regards,
> >
> >Chris
> >
> >--- Tesla list wrote:
> > > Original poster: "Steven Ward by way of Terry Fritz
> > > "
> > >
> > > Did YOU make the motor synchronous? Maybe its
> > > loosing sync or just isnt
> > > modified correctly (like its running a 3599 rpm
> > > rather than 3600 rpm).
> > > Though thats seems unlikely, i cant figure what else
> > > would c! ause operation
> > > to swing in and out like that. Are you using safety
> > > gaps? I hope so! Im
> > > also guessing you have tried to play with the
> > > phasing? But then again,
> > > that should not make operation seem so strange.
> > >
> > > Steve Ward
> > >
> > >
> > > >From: "Tesla list"
> > > >To: tesla-at-pupman-dot-com
> > > >Subject: Problems with SRSG on TC
> > > >Date: Mon, 30 Jun 2003 20:10:26 -0600
> > > >
> > > >Original poster: "Zagarus Rashkae by way of Terry
> > > Fritz
> > > >"
> > >
> > > >
> > > >Hi all,
> > > >
> > > >I recently completed an SRSG that runs at 3600 RPM
> > > >with a 1/4 inch by 7.5 inch dia Lexan disk, with 4
> > > >stainless steel electrodes for 240BPS. I use a MOT
> >! > >stack running at about 2kVA and a 38nF cap.
> > > Secondary
> > > >is 1000 turns or so of 22AWG on 4 inch SCH 40 PVC.
> > > >Toroid is 4 by 16. I don't know what is wrong with
> > > my
> > > >TC but it only sparks intermittently, and I think
> > > this
> > > >is due to my RSG. Any clue as to what causes this?
> > > >
> > > >The TC outputs 3 foot sparks at best, falling short
> > > of
> > > >the 3.5-4 feet that I got from an air blast single
> > > >gap. It goes "zzzt..." and quits, then after
> > > another
> > > >20 seconds or so it goes "zzzz..." for about 5
> > > >seconds, etc...
> > > One thing that I never noticed before was that when
> > > running at 3kVA or so the cap's saftey gap fired,
> > > sounded like a gun firing many times per second.
> > >
> > > Thanks in advance,
> > >
> > > Chris
> > >
> > >
>
>
>
>