Re: Rotating electrical contact - solution?

On Wed, 31 Oct 2007 15:29:33 -0000, beatbox <downlode@xxxxxxxxx>
wrote:

Hi all,
Sorry if this may be more of an engineering question, but maybe
someone here has some experience of this.
I am making a toy for my son. There is a small motor which drives a
propeller, which makes part of the toy spin. The motor is mounted on
this spinning part. The power source cannot be mounted on this part.
So I need to make an electrical contact between a spinning part and a
static part. I am not sure how to do this reliably, and with the
minimum of friction.
Any ideas?
Thanks

Build a slip ring or pair of them.

I made this kinetic wire sculpture that needed something like that.
Small airplane with navigation lights and prop . . . the plane was
supported with a #12 steel wire - I cut the terminations off of a 1/4"
stereo phone jack and slid the works down over the steel wire
(scrapping the "tip" and keeping the barrels and insulators). Put a
couple of phosphor bronze wipers to make connections on the stationary
part.

Real high current slip rings are a little harder. Cut rings from
rigid copper tube or use straight couplings and slide them down over
CPVC pipe - takes some effort but chucking the pipe in a drill press
and using sandpaper to turn it down a little. Hardware stores carry
DC motor brushes, hobby shops have rectangular brass tubing for
building up brush holders.
--

----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----
.

Relevant Pages

  • Re: Rotating electrical contact - solution?
    ... I am making a toy for my son. ... The motor is mounted on ... Build a slip ring or pair of them. ... stereo phone jack and slid the works down over the steel wire ...
    (sci.electronics.basics)
  • Re: OT - Voltage Converters 110V - 220V
    ... |> European-made toy electric trains run on AC, ... you need to consider cycles. ... This will affect the speed of the motor. ... 50-60 Hz power from 100 to 250 VAC. ...
    (rec.outdoors.rv-travel)
  • Re: bump n go robot help?
    ... motor, it`s not easy to describe tho. ... pair of wheels in a free turning cage. ... protrusions on the underside of the toy. ... least knew what I should be expecting from the robot, ...
    (sci.electronics.repair)
  • Re: bump n go robot help?
    ... described it further in a reply to my original post. ... These kind of toys usually have a simple mechanism driven by a single motor, it`s not easy to describe tho. ... The whole toy balances on these wheels, stabilised by a couple of protrusions on the underside of the toy. ...
    (sci.electronics.repair)