Newsgroups: comp.robotics
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From: exujet@exu.ericsson.se (Jerry Ethridge)
Subject: Re: tiny motors
Message-ID: <1994Jul20.164025.12636@exu.ericsson.se>
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Organization: Ericsson Network Systems, Inc.
References: <NDqRPc2w165w@sfrsa.com>
Date: Wed, 20 Jul 1994 16:40:25 GMT
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              Any opinions expressed are strictly those of the
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In article NDqRPc2w165w@sfrsa.com, bsmall@sfrsa.com (bsmall) writes:
>Scott Williams <macduff6912@delphi.com> writes:
>
>> does anyone have info on VERY small dc motors.  I don't mean nanotech small,
>> but the smallest ive been able to find is approx. 7/8" by 7/8".  I'm thinking
>> along the lines of 1/2" x 1/2".  Obviously, I'm thinking on a little, bity
>> robot.  any info on such a motor would be great.  I would dread having to mak
>> thke
>> them myself.
>>  
>>                   thanx,
>>                       Scott
>
> 
>Check out Edmund Scientific. They have a small Mibuchi motor I 
>would say about 3/8 inch diameter. It may be sold as a propeller
>unit.



I ordered 5 of these small motors from Edmund Scientific and I don't
like them. They are built rather strangely. Normally a small motor
of this type will have two permanent magnets surrounding the rotor,
the Mibuchi motors described above have only one and as a consequence
the output shaft is not centered on the motor. Also, I could not get
them to rotate without spinning them by hand first. I was disappointed	
with them and would recommend against them.

---
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Jerry Ethridge		     Richardson, Tx.                 |
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exujet@exu.ericsson.se                            \_______[|(.)|]_______/
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