Star Trek spinner jumps

I posted about this a while ago, and am just revisiting it now. My Star
Trek spinner 'jumps' quite a bit, making it hard to aim.

Suggestion was dirt on the optics. That's not it, at least I don't think so
now.

Looking at the output of pins 1/4 on the spinner itself, they look fairly
clean. The only thing a bit strange is that by moving the spinner slowly
enough I can adjust the ouput votage, rather than a simple on/off output.
One of the two seems to change state faster than the other too.

Other than that, I'm stumped. The schematcs are less than helpfull. The
cabinet wring diagram calls P21 pins 1/4 Clock and Direction, which I think
is wrong. They should simply be two 90-degree out of phase wave forms, from
which you can derive clock and direction, am I correct ?

Then the output of the little interface board are just labeled B0 - B7 ,
whch isn't very helpful. Is there an actual clk/dir signal I can check ?

Anything else helpful I can check? I was looking at the opto outputs as
simple line levels -- watching the output line go up and down. Trying to
time the spinner by hand to watch a waveform didn't work too well.

-Chris

==========================================================
Chris Candreva -- chris@westnet.com -- (914) 967-7816
WestNet Internet Services of Westchester
http://www.westnet.com/

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Received on Sat Feb 16 15:09:48 2002