Re: [ATM] A powered alt-az ground-board

["Don Clement" <don_clement@charter.net>]

I believe the correct term is slip ring as a commutator is meant to
periodically reverse the current direction as used in a DC motor. see:
http://en.wikipedia.org/wiki/Commutator_%28electric%29 &
http://en.wikipedia.org/wiki/Slip_rings



Don Clement

Running Springs, California
>
> --- Shane LaPierre <shane@ct-astronomer.com> wrote:
>
> > I want to provide a power supply thru the ground
> > board of
> > my 20" scope .... I have thought of just having
> spring-loaded contacts
> > press
> > against 2 separate round conductive circles.
>
> Isn't that called a commutator?  Could probably dig up
> some ideas by googling that (there's even something
> called the Industrial Commutator Company).  There are
> lots of designs for commutators and brushes for
> electric motors and generators (and, I imagine, for
> instrumentation systems on rotating platforms, where
> contact noise would be an issue).  Not that I've ever
> tried it, but I would guess you won't have to reinvent
> the (conductive) wheel for this project.
>
> Ross
>
>
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