Update:
I ditched my homemade balance wheel (made from 2x4's and 4 ball bearings)
and instead opted for a knife edge balancer (made from 2 metal straight
edges supported in a vise). The completed assembly (rotor, hub, G10 disc
without electrodes) needed 40 grains (2.59 grams) of weight to balance out.
The disc spins virtually vibration free now! Since this is such a small
amount of weight and not really feasible to grind a piece of tungsten to
this weight difference, I think I will use small shims/washers between the
disc and the shaft collar to make it balance.
I also was able to use a white LED hooked up to my variac to flash at 60
Hz. While not a perfect strobe, it clearly shows a fixed <90º arc from a
piece of masking tape on the disc, which is good enough for me to eyeball
the center of the arc and then use the phase controller to dial it in.
Thanks for all the comments and insight thus far,
~Dan
Kansas City area
On Mon, Oct 29, 2018 at 7:30 AM Brandon Bebault via Tesla <tesla@xxxxxxxxxx>
wrote:
> Dealing with the same issue. I’m new to pupman hope I’m doing this right.
> Here is a link to the srgs I designed https://instagram.com/p/BpQ0njvg9QC/
> I used to a keyence laser proximity sensor to easy the position of an
> electrode while in presentation I would like to use a strobe scope to
> also test it. I heard you could use a old school ballasted fluorescent bulb
> to get this effect but haven’t tried it.
>
> -Brandon Bebault
>
> Sent from my iPhone
>
> > On Oct 28, 2018, at 10:07 AM, Finn Hammer via Tesla <tesla@xxxxxxxxxx>
> wrote:
> >
> > Dan, you can replace the moving electrodes with identical items made from
> > iron bar . Do the same with the stationary electrodes, and attach a nice
> > neodymium magnet to them at the far end. Next, wind a coil with, say, 50
> > turns around these stationary electrode substitutes.
> > When the electrodes pass by each other, an increase in magnetic flux will
> > be the result, and this fluxvariation will induce a current in the coils,
> > which you can monitor with your scope.
> > This should make it east to calibrate the gap once and for all.
> >
> > Hope this helps, Cheers, Finn Hammer
> >
> > ----- Original meddelelse -----
> >
> >> Fra: Forrest Mohrman <forrestmohrman@xxxxxxxxx>
> >> Til: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> >> Dato: Søn, 28. okt 2018 13:01
> >> Emne: Re: [TCML] SRSG strobe
> >>
> >> Hi Dan. On vacation at present but I do have a simple to build timing
> >> light using a LED. Will send it to you in early November.
> >>
> >> Bud
> >>
> >> On Sun, Oct 21, 2018, 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
> >>> _______________________________________________
> >>> Tesla mailing list
> >>> Tesla@xxxxxxxxxxxxxxxxxx
> >>> https://www.pupman.com/mailman/listinfo/tesla
> >>>
> >> _______________________________________________
> >> Tesla mailing list
> >> Tesla@xxxxxxxxxxxxxxxxxx
> >> https://www.pupman.com/mailman/listinfo/tesla
> >
> >
> > Mvh. Finn Hammer
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxxxxxxxxxx
> > https://www.pupman.com/mailman/listinfo/tesla
> _______________________________________________
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>
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