Newsgroups: comp.robotics
Path: brunix!cat.cis.Brown.EDU!agate!msuinfo!harbinger.cc.monash.edu.au!news.cs.su.oz.au!metro!dmssyd.syd.dms.CSIRO.AU!crux.rp.CSIRO.AU!leon.atnf.CSIRO.AU!DABBOTT
From: dabbott@atnf.CSIRO.AU (David Abbott)
Subject: Re: tiny motors
Message-ID: <1994Jul31.034240.8644@rp.CSIRO.AU>
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Reply-To: dabbott@atnf.CSIRO.AU
Organization: CSIRO Australia Telescope.
References: <Bu9wSti.macduff6912@delphi.com> <31a9taINNt2v@myall.awadi.com.au>,<hc5wjhA.macduff6912@delphi.com>
Date: Sun, 31 Jul 1994 03:42:40 GMT
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In article <hc5wjhA.macduff6912@delphi.com>, MACDUFF6912 <macduff6912@delphi.com> writes:
>Not a bad thought (a walkman motor).  Sadly, when I ripped my
>Walkman down, I found the motor to be too large.  I would be thrilled to
>find a motor with a diameter of even up to an inch, but a width no larger
>than 1/2".   The search continues.
> 
>                   Scott

  How 'bout some more detailed specs ? Are you total space limited or
just at the drive point ? Hydralics or pneumatics (cf. a dentists drill)
can produce high torque, compact drive systems at the point of movement. 
But with electric motors you just have to have a certain area of coil and 
magnet, whether it is radial or axial.

  If you need a _very_ small motor (slow speed and low torque) try the
stepper motor from an analog display (but electric) watch.

Dave

