At 9:54 AM -0800 1/2/98, ragreiner wrote:
>Abrams wrote:
>
>> How about eliminating the Dec motor cable?...
> There are 6 wires that need to be connected between the Dec drive and
>the main computer. Believe me when I say that one of the most difficult
>problems in mechanical control design is getting connection around
>joints that need to rotate 360 degrees. This is a very very difficult
>problem. If you have a good solution let us all know...

Why not just have a cable that goes thru the RA axis and gets twisted up a
little? The existing software prevents rotation more the 360 degrees so
that ought to be sufficient to keep the twisting to an acceptable level.

A better solution is probably to have everything above the RA axis like the
Celestron Ultima 2000. There would then be only one remaining connector to
the power supply that needs to twist. A slip ring ought to work for that.
Or just let the cable twist up since the user can easily untwist it when
necessary.

---
Bill Arnett "Science is a way of trying
San Jose, CA USA not to fool yourself." -- Feynman

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