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,

Nope, it doesn't. If your that close, it's not an issue.
Have you made any phase adjustments yet?

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>
>
>Hi Bart, all,
>
>I just measured the gap spacing and it is .05 on each
>side, for a total gap of .1. Sorry for any confusion I
>may have caused.
>
>I don't see how this would explain the erratic firing.
>
>Regards,
>
>Chris
>
>--- Tesla list <tesla-at-pupman-dot-com> wrote:
> > 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
> > > > >
> > > >
>
>
>
>