Re: Rotating electrical contact - solution?
- From: beatbox <downlode@xxxxxxxxx>
- Date: Wed, 31 Oct 2007 21:11:33 -0000
On Oct 31, 6:07 pm, default <defa...@xxxxxxxxxxxxx> wrote:
On Wed, 31 Oct 2007 15:29:33 -0000, beatbox <downl...@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.
Thanks all.
Something like that should do the trick. Nice idea to use a stereo
jack. I'm just a bit worried about the friction slowing the movement,
as it will be quite a delicate thing without a great deal of
propulsive energy. I'll do some experiments and see what works.
.
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