RE: LTR Charging vs. Firing Time

At 11:25 AM 6/21/99 -0400, you wrote:

Hi Gary,

	My sync motor is not shaded pole type so I always have to set the timing
every time I turn it on.  I printed up a strobe disk and stuck it on my
rotor (Ink jet printer - non conductive).  The florescent lights in the
room very easily show the gap position and I have a handle the turns the
motor to adjust the timing.  I can also turn it while it is running to find
the best spot (long handle :-)).  I hardly ever use a scope to set it since
I have learned now were to set it.  However, I often tweak it while playing

Although, it may seem simple to find a better way.  For me, the strobe disk
and florescent lights are the easiest.  I only had to print up and glue the
disk on and I was set.  It is no real problem to turn it on and just turn
the motor till one finds the best sparks either.

A picture of the gap (not quite done yet but...) is at:


The two stationary electrodes are mounted on poly which may melt in longer
runs.  I may have to use a better material.  Also, the rotor still needs a
housing incase something goes wrong.  This is sort of a prototype but you
will see the idea...



>Hi Terry:
>While it's clear how to adjust a simulation for optimal sync RSG timing,
>how do you adjust a real coil?  Is it sufficient to simply rotate the
>sync motor in it's cradle for maximum arc length, or do you scope the cap
>charging voltage vs. AC mains voltage at a low variac setting and adjust
>the motor phase, prior to cranking up to full power?  I know that it
>would be bad to apply power when the phase is 90 degrees away from peak
>(zero cap voltage at gap presentations)...
>Regards, Gary Lau
>Waltham, MA USA