"George" george@least wrote in message
...

"Ken Moon" wrote in message
k.net...
Arch and Leo,
You could do a strobe with an automotive timing light. Using a set of old
fashioned ignition points (remember those?), a cam lobe attached to the
spindle, a battery and an ignition coil, you'd be all set. Of course,
you'd
have to turn the lights down, so that may increase your band aid bill !!
:-)


Of course, that would be synchronous, and of little help. You could get
the
same effect by shining a flood through a hole in a piece of plywood
spinning
on the outboard.
=========================
George,
I'd have to try that, but I don't think that would "stop" the rotation like
the timing light or a strobe light.
The "stopping " effect is due to the sudden impulse of a capacitor thru the
Xenon lights or single discharge thru the old cheapo neon lights trigged by
the coil discharge. The plywood used with an incandescent light would give a
moving "window", but the time of exposure at lower roughing speeds (below
1000 RPM) would tend to result in a blurring effect. There would be some
penumbra effect as the hole approaches and departs the main beam area. The
penumbra area would be dependent on distance from the plywood to the light
source and the distance from the plywood to the work piece, and also the
size of the light source. Like I said, I'd have to try it to be sure.

Ken Moon
Webberville, TX