Re: Initial setting for sync phase angle on an RSG
I have been using a strobe light:
To sync my gap with great success. It only costs about $10. I made a
little chart that I stick on the side of the motor marked off in mS of
timing. I use the strobe to get the chart set, then I can just dial the
motor sync in as I please. Since the gap fires a bit early due to the high
voltage arcing (sooner than when the gaps align), I add about 500uS or
adjust the chart to compensate for that. Of course, simply adjusting the
gap timing for the best spark works too. Us LTR folks like to know that
timing really close and the strobe light eliminates the need for a scope
which many don't have...
A picture of the simple guts and the strobe are at:
Pictures of the charts on my sync motors are at:
I large file (~450k) of the chart I use for 4 pole 1/4 HP (5.6 inch case
diameter) motors is at:
I can mail the charts to anyone that is not able to print them to the right
At 07:30 PM 02/05/2000 -0500, you wrote:
>I don't have an RSG my self to try this on, but I had a thought.
>You temporarily replace the stationary electrodes on your RSG with metal
>wire the electrodes to a small battery with a series resistor so that current
>would flow when the rotating electrodes bursh past the stationary brushes.
>connect a dual trace scope so that the first trace is connected to your 110
>and the second trace connected between the RSG electrode and resistor?
>You should see a nice sine wave on the top trace, and a pulse indicating
>RSG fires on the bottom allowing you to adjust the phase angle rather
>without having to put your hands close to HV.
>Think this would work???