Newsgroups: comp.robotics
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From: hrynkiwd@cuug.ab.ca (Dave Hrynkiw )
Subject: Re: Selecting DC motors for a differential drive system
Sender: usenet@cuug.ab.ca
Message-ID: <CrD3n0.57L@cuug.ab.ca>
Date: Tue, 14 Jun 1994 00:49:48 GMT
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Organization: Calgary UNIX User's Group
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In article <2ti37h$cq5@info-server.bbn.com> dkroy@bbn.com (Deb K. Roy) writes:
>
>I recently found a cheap ($30) motorized car that children can ride, and took
>out the drive mechanism.  It seems to be powerful enough and the


	Hi Deb.  $30?!?  If these are the same kind of geartrain I use in
my SUMObots, you can get them for cheaper.  Lessee.... I can get them here
in Canada for about $7 each (with motor), and Herbach & Rademan (18008488001)
has them for $9.95 each (item TM89MTR5627)..

	They (H & R) also have a hub and axle kit for 7.50 that fits it too.
It looks like H&R has the older style geartrain - the newer ones are much
slimmer.

	I've had no problems modifying the @$%@! out of them to get the RPM
I need.  VERY strong, VERY reliable, VERY noisy!  Being straight-cut teeth,
they do make a bit of a racket, but I don't think they can be beat for cheap,
strong, and durable.  Big endorsement from me.  I have pushed a 60lb+ kitchen
island across the linoleum with my twin drive sumobot from a 6volt, 6 amp/hr
gell cell.  No problems so far.

	Have fun (I did!)

	-Dave
-- 
Um, no - that's H,R,Y,N,K,I,W. No, not      \ hrynkiwd@cuug.ab.ca
K,I,U,U, K,I,_W_.  Yes, that's right.       \ Calgary, Alberta, Canada
Yes, I know it looks like "HOCKYRINK."      \ Home of the Western Canadian
Yup, only 2 vowels. Pronounciation? "SMITH" \ Robot Games - APRIL 9 1994 


-- 
Um, no - that's H,R,Y,N,K,I,W. No, not      \ hrynkiwd@cuug.ab.ca
K,I,U,U, K,I,_W_.  Yes, that's right.       \ Calgary, Alberta, Canada
Yes, I know it looks like "HOCKYRINK."      \ Home of the Western Canadian
Yup, only 2 vowels. Pronounciation? "SMITH" \ Robot Games - APRIL 9 1994 
