Subject:
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Re: gear differential
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 20 Nov 1998 20:31:12 GMT
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Original-From:
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Ken Spencer <artsign@goldcom+avoidspam+.com>
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Viewed:
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3902 times
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I'm looking forward to seeing your improved design.
Ken
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> From: alex wetmore <alex@phred.org>
> To: Medical Informatics Consulting <medinfo@aros.net>
> Cc: Tim McSweeney <tim@ams.co.nz>; lego-robotics@crynwr.com
> Subject: RE: gear differential
> Date: Friday, November 20, 1998 11:14 AM
>
> On Thu, 19 Nov 1998, Medical Informatics Consulting wrote:
> > check out http://carol.wins.uva.nl/~leo/lego/diff.html for a nice • device
> > for controlling a tracked vehicle. I've modified it slightly to • flatten
> > it a layer and use a micromotor for the steering and a one of the • motors
> > from the Mindstorms set (a mini motor) for the power. Two mini motors
> > could be used, but it makes the steering more touchy.
>
> this is a fantastic device. i played with it today and build a new
> robot platform using it. i also flattened it by one layer, and i
> also make it one element wider (to make its width an even number,
> which makes it easier to work with). the main problem with it is
> that there are tons of gears involved, so there is a fair amount
> of efficency loss compared to running the output of motors directly
> to wheels.
>
> in my design i swapped the inputs and outputs (the existing design
> doesn't really carry what is an input and what is an output) and
> puts one motor on each input. running one of the motors forwards
> or backwards runs the robot forwards or backwards. running the
> other motor forward or backwards turns the robot left or right
> on axis.
>
> i'll try and take some pictures this weekend and put them on
> my website if others want to see the design.
>
> alex
>
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