Re: Star Trek spinner jumps

Typically jumpy Star Trek spinners are simply caused by bad connections.
Typically the wires pulling out of the connector at the CPU board, or the
molex pins at the connectors not making contact.

----- Original Message -----
From: "Christopher X. Candreva" <chris@westnet.com>
To: <vectorlist@synthcom.com>
Sent: Saturday, February 16, 2002 6:10 PM
Subject: VECTOR: 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 15:51:13 2002