Terry,
RC Plan Proper balancer! Genius! Thanks for pointing this out to me. If my
homemade balance wheel does not work this seems like a cheap and readily
available option. I just hope it is stout enough to handle the mass of the
rotor/disc/electrodes.
Thanks,
~Dan
On Wed, Oct 24, 2018 at 7:27 PM Terry Oxandale <Toxandale@xxxxxxx> wrote:
> Yeah, I had to use a prop balancer (from my old RC airplane days) to get
> mine close enough were I felt comfortable with the very small vibrations
> that still exist.
>
> -----Original Message-----
> From: Tesla [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of Steve White
> Sent: Monday, October 22, 2018 10:12 PM
> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> Subject: **External Email** Re: [TCML] SRSG strobe
>
> Dan,
>
> Since I read that you are using a 3600 RPM rotor, balance will be crucial,
> otherwise it could fly apart or shake your coil to pieces. I had a very
> hard time balancing just 4 tungsten flying electrodes on an 11" rotor
> turning 3600 RPM. I can't imagine how I would balance 16. I hope you have
> special balancing equipment. Even if you get the rotor perfectly balanced,
> as the the flying electrodes wear, the rotor will begin to unbalance. It
> all depends on how even the erosion is. What I am saying is that the more
> flying electrodes that you have, the more difficult things become.
>
> Steve White
> Cedar Rapids, Iowa
>
> ----- Original Message -----
> From: "Daniel Kunkel" <dankunkel@xxxxxxxxx>
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Sent: Monday, October 22, 2018 8:37:46 PM
> Subject: Re: [TCML] SRSG strobe
>
> Steve,
> I'll definitely experiment with the bps. 16 holes will allow for quite a
> lot of possibilities....
> 120
> 240
> 480
> 960
> I can't wait to see the final results!
> ~Dan
>
>
> On Mon, Oct 22, 2018, 8:30 PM Steve White <steve.white1@xxxxxxxxx> wrote:
>
> > I know that using an optical sensor with an oscilloscope provides a
> > very precise way to insure that the flying electrodes line up with the
> > stationary electrodes at whatever phase angle on the 60 Hz power line
> > that you pick on the oscilloscope. Now, whether or not that is the
> > optimum firing point may be a different matter. On my pole-pig powered
> > coil which runs at 240 BPS, the firing angles of 0, 90, 180, and 270
> > degrees which I set with my oscilloscope did indeed seem to be the
> > optimum. I built a very nice John Freau style phase adjuster to make
> > fine adjustments. When I used it to vary the phase angle from the one
> > that I set with the oscilloscope, I saw no difference in streamer
> > performance or quality. Maybe the effect is much greater with a 120
> > BPS NST-powered system. Some posters have suggested that a 240 BPS
> > system is closer in performance to a ARSG because it fires 4 times per
> cycle where firing points may not be as critical.
> >
> > Steve White
> > Cedar Rapids, Iowa
> >
> > ----- Original Message -----
> > From: "Gary Lau" <glau1024@xxxxxxxxx>
> > To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> > Sent: Monday, October 22, 2018 5:09:07 PM
> > Subject: Re: [TCML] SRSG strobe
> >
> > What exactly is the goal here? Assuming that you're successful in
> > getting the timing light to sync and fire 120PPS, that still gives no
> > useful information as to whether the RSG is set to fire at the optimum
> > phase angle. The best you can hope for is confirmation that the motor
> > is in fact synchronous and that the phase can be varied. I'm unaware
> > of any means to set the phase other than varying the phase and
> > monitoring spark performance. The optimum phase of the RSG relative
> > to the mains phase will vary with primary cap size and Variac setting,
> there's no fixed "best"
> > setting relative to mains peak. That's why the variable Freau SRSG
> > controller* is such a godsend - it's always something that you'll want
> > to tweak. In my experience, the SRSG phase is super-critical at
> > 120BPS, there's a clear increase in spark performance as I retard the
> > firing, up until a critical point, and then it becomes unstable, so I
> > back it off a tad.
> >
> > As far as protecting the NST, a safety gap in parallel is mandatory in
> > parallel with the RSG.
> >
> > For a simpler means of viewing the phase of your SRSG relative to
> > mains phase, attach a small magnet to the shaft, and mount a small,
> > high turns count inductor so that the magnet sweeps past it. Scope
> > the voltage across the inductor and sync the scope to the line. You
> > should see induced voltage blips with each sweep of the magnet, and
> > you should see that waveform shift as you vary the phase of the SRSG.
> >
> > *See my RSG web page - http://www.laushaus.com/tesla/sync_gap.htm
> >
> > Regards,
> > Gary Lau
> > MA, USA
> >
> >
> > On Sun, Oct 21, 2018 at 11:55 PM Daniel Kunkel <dankunkel@xxxxxxxxx>
> > wrote:
> >
> > > I'm getting ready to build my phase controller to control my new
> > > SRSG. I thought I've heard of others use an automotive ignition
> > > timing light to strobe and watch the phasing, but I can't get mine
> > > to trigger off a 60Hz source. Can anyone offer some advice here?
> > > ~Dan
> > > Kansas City area
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