Subject:
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Re: Non-pivoting free wheels (was Re: odometry (was Re: Homing with the IR Tower)
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 3 Aug 1999 15:19:12 GMT
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Original-From:
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Laurentino Martins <lau@mail.^AvoidSpam^telepac.pt>
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Viewed:
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3727 times
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At 20:34 03-08-1999 Tuesday , Robert Munafo wrote:
> You'll have a very hard time making a ball-and-socket design bear a load and
> turn without lots of friction. Putting wheels between the ball and the socket
> just brings us back to the problem that we were trying to avoid by not having
> wheels.
>
> A much better solution that will definitely accomplish what you want is 1/3 of
> a Killough platform. This is a pair of balloon tires that are free to rotate on
> two axes (via a rotating mount) and geared to each other so that the primary
> axles of the two wheels are always at a right angle, but coplanar.
<snip>
Whoa! =:-o
That's what a call a DESIGN!
I'm almost burning a fuse trying to image one of those running, err... turning... whatever it does!
OK, what are good sources of baloon tires? (sets) :-)
Laurentino Martins
[ mailto:lau@mail.telepac.pt ]
[ http://www.terravista.pt/Enseada/2808/ ]
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 1 Reply:
Message is in Reply To:
 | | Re: odometry (was Re: Homing with the IR Tower)
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| I haven't done any 'bot yet but I have been thinking about this problem. and here's the result: it looks like the good free wheel should do its 'wheeling' equally well in each direction. therefore it should be a ball. the design should look like (...) (27 years ago, 31-Jul-99, to lugnet.robotics)
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