Subject:
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Re: ok, time for a stupid question...
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 19 Jan 1999 05:40:38 GMT
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Original-From:
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Dave Taira <bodhi@foad.orgSTOPSPAM>
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Viewed:
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1217 times
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On Mon, 18 Jan 1999, dave madden wrote:
> =>Chris Stanley wrote:
> =>> what exactly is the purpose of a differential gear?
>
> Zachary A. Bourk" <zbourk@san.rr.com> replied:
> =>
> =>I believe it allows the two wheels attatched to one drive shaft to turn
> =>at different rates, thus allowing the gear-motor system to corner
> =>without skidding.
>
> That's a common use in the real world. You can also make mechanical
> adding and subtracting devices from them.
Indeed. There's a very cool hands-on display at the Exploratorium (for
anyone fortunate enough to live within driving distance of San Francisco)
that has a single motor input, and two wheel outputs. Motor runs, and
both wheels turn at the same rate togther. Hold one wheel, and the other
spins twice as fast. Rotate one wheel *against* the input, and the other
wheel spins even faster.
Like someone else said, it's a summer (that is, something that does sums).
The sum of the two outputs is a constant, relative to the input.
Dave Taira | Broken pipes, broken tools, people bending broken rules / |
Hired Gun | Hound dog howlin', bullfrog croakin' / Everything is broken |
bodhi@foad.org | --Bob Dylan, "Everything is Broken" |
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message is in Reply To:
 | | Re: ok, time for a stupid question...
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| =>Chris Stanley wrote: =>> =>> what exactly is the purpose of a differential gear? i've got several of =>> them, i've seen them used in various projects, but i've never quite =>> managed to figure out what they do. Zachary A. Bourk" (...) (26 years ago, 19-Jan-99, to lugnet.robotics)
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