Gary,
I know the motor fully synchronizes at 120 vac (no need to over volt). I
can see the fixed visual artifacts under regular fluorescent light. And
when I unplug it I can see those visual art affect start wandering around.
I have no doubts about the motor.
But their goal here is (1) be able to initially try to set the flying
electrodes with the fixed electrodes (mocked up on the coil chassis) before
I fire it up the first time, so that I don't release the magic smoke while
fiddling with the phase controller.
And (2) to ensure that my phase controller has a usable range of adjustment.
Am I wrong here?
~Dan
Kansas City area
On Mon, Oct 22, 2018, 5:09 PM Gary Lau <glau1024@xxxxxxxxx> wrote:
> 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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