Thilo Klein <ostentativ <at> arcor.de> writes:

> I want to design a slip ring system with concentric circles to
> transmit 7 signals(ie 8 connectors). Do thou know a source(I prefer
> books) which shows several methods of transmitting signals on rotating
> elements ?!
> 
> Diameter of the outermost circle: 117 mm.
> 
> Diameter of the innermost circle: 81 mm.
> 
> Max voltage: 12V
> 
> Max current: 1A

It is much easier to make a cylindrical transmitter (with eight copper rings
glued on a delrin tube pushed over the axle and use standard carbon brushes and
holders obtained as spare parts for an electric motor with the same diameter
collector as stator contacts).

For the 'disc' approach I have used four (or eight) pieces of model car race
track and the contact 'shoes' from the cars once. This is good for 4 wires and
1A and 12V as you need. The tracks are laid in a circle and glued on the moving
part (which was a spinning exhibit table in my case - so it did not need to be
very reliable or long lived). The shoes were glued on plastic rulers which were
each held by a bolt on the other side, so they could pivot. This took care of
any small eccentricity. A piece of rubber tube glued under the rulers provided
tension (very little is needed for car brushes).

Of course this is a toy.

hope this helps,
Peter


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