Subject:
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Re: walker that turns?
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 1 Nov 1999 17:34:12 GMT
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Original-From:
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Patrick Hayes <PAT@PATRICKHAYESspamless.COM>
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Viewed:
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569 times
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> In lugnet.robotics, lego-robotics@crynwr.com (Horacio J. Peña) writes:
> > Has somebody worked on a walker that could turn? Some ideas
> > of how to do it?
>
> Well, this might not be very feasible, but how about a joint in the middle • that
> bends left or right? Hence, the body is normally straight, and then bends • to
> the left or right when turning?
>
> In terms of plausibility with Lego, you'd have to use a large Technic
> turntable, or more in series... The other downside is that if all 4 (I'm
> assuming 4) legs are geared to walk together, this makes it somewhat more
> difficult to make the gearing still work... would be more suggestive of • making
> the forward and rear legs work independantly... but there are always other • ways
> to do it...
Basically what you really need is a variation on a limited differential, in
Legos. Such a contraption could be useful in many projects, be they wheeled
or legged. Ideally, you would want it so as whatever steering mechanism is
turned the relative speed ratios of the two elements change (but without the
"slip" that car differentials have). Has anyone done it, or does anyone
know how to do it? (this would take some serious thinking, probably)
We ought to organize a toolkit site (or section for that in the existing
site), where you can in an organized fashion find instructions on ways to
build each of the types of mechanisms like this that apply to many projects
(as well as saying what hasn't been done yet, to give people ideas). Thus a
section for robotic claws, a section for differentials, a section on how to
build a stair climbing mechanism, etc. The current site is a bit of a mess
(I could build a cleaner multipage version, if anybody wants me to).
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Message has 1 Reply:
 | | organize a toolkit site (was Re: walker that turns?)
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| (...) A non-Lego(TM) "Constructopedia" has been discussed before for just that purpose. The most promising work seems to be the Kego Constructopedia. See (URL) project seems to be in the hands of university students. In the mean time, I propose (...) (25 years ago, 1-Nov-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: walker that turns?
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| (...) Well, this might not be very feasible, but how about a joint in the middle that bends left or right? Hence, the body is normally straight, and then bends to the left or right when turning? In terms of plausibility with Lego, you'd have to use (...) (25 years ago, 1-Nov-99, to lugnet.robotics)
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