Re: [TCML] Two phenomena...

[Brandon Garretson <garretsontech@xxxxxxxxx>]

Sorry if Im repeating myself, I may have mentioned this before.
I have found (IMO anyway) a cheap, quick and fun way to observe the
operation of an SRSG is by simply shining an adjustable strobe light on it.
I have a couple that I use for Halloween and they can be found at any party
supply store.
It gives a great real-time visual perspective on things.
I tried using a florescent light at every angle and intensity and was never
able to make out more than a very vague X.
I even used a UV light and florescent colored straws on the electrodes,
better, but still a bit of a blur.
The strobe gives a great freeze-frame and any variation is easy to detect.
It is also helpful to mark one electrode with a Sharpie and adjust the
strobe timing so that you see only that one mark, that way you know its
flashing at 120 and not 240.
Interestingly enough I have never thought about this until I just typed it,
we cant see that many frames per second can we? IDK. Maybe its only 60 or
even just 30 of them that the human eye can pick out.
Either way, it works great.


On Tue, Jul 27, 2010 at 2:47 AM, Phil Tuck <phil@xxxxxxxxxxx> wrote:

> Joe,
> As  others have said you are slipping out of sync. I modified a motor once
> and checked its sync' by using an oscilloscope (the disc itself tripped an
> IR beam and then compared it with the mains cycle on a duel channel o'scope)
> It showed itself to be in sync' until I ran it with the added the weight of
> the electrodes and their holders. Then it would very slowly slip out of
> sync', with it only 'aligning' with the mains cycle once every couple of
> seconds. You could actually watch the trace on the scope slowly creeping
> across the screen, instead of staying stationary.
>
> In my own case (which is unlikely to apply to you unless you are using a
> motor you have modified yourself) I needed to remove a bit more from the 2HP
> motor's rotor.  Most likely though it is as John or Garry suggests: Voltage
> drop; motor size; phase controller. My favourites being the first two:
> especially motor size.
>
> Have fun.
> Phil
>
> --------------------------------------------------
> From: "Joe Mastroianni" <joe@xxxxxxxxxxxxxx>
> Sent: Monday, July 26, 2010 5:18 AM
>
> To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
> Subject: [TCML] Two phenomena...
>
>
>
>
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