Subject:
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Re: Need to compare
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 28 Sep 2002 19:47:49 GMT
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Original-From:
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Mike Thorn <BUACHAILLE@NEO.RR.antispamCOM>
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Viewed:
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809 times
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At 02:35 PM 9/28/02, you wrote:
> We have already seen the shrimp and we think to build something like that
> (maybe also with tri-star wheels)... But if somebody find a better solution,
> because we don't know the comportement of the shrimp with a little hole on
> the ground. A whole just large enouh to "keep" a wheel...
I like the tri-wheel design. If you make if big enough it shouldn't have
any trouble. Something like this (or bigger):
http://mindstorms.lego.com/inventions/invention.asp?ID={18963B1A-0087-241F-2DE2-5BD563820A4A}&slotN=2
> For the step, it begins at 1cm and it will be increased until no véhicule is
> able to climb this step...
The advantage of an ODEX design. Very wide extremes.
I know this is harebrained, but how about some sort of winch system? It
shoots out a grappling hook and pulls itself forward.
~Mike
http://www11.brinkster.com/buachaille/newsletter/
> Vincent
> ----- Original Message -----
> From: "Steve Baker" <sjbaker1@airmail.net>
> To: "Vincent Raman" <Vincent.Raman@ulb.ac.be>
> Cc: "Mailing list robotique" <lego-robotics@crynwr.com>
> Sent: Saturday, September 28, 2002 7:01 PM
> Subject: Re: Need to compare
>
>
> >
> >
> > Vincent Raman wrote:
> > > Thank you for your idea... but I forgot to say you that I have • restriction
> > > for the dimensions...
> > >
> > > Dimensions : height : 30cm
> > > Lenght : 60cm
> > > width : 30cm
> >
> > Is that the *initial* dimensions - or the *maximum* dimensions?
> >
> > If it's just one of those things like "the robot must start off in a
> > box no bigger than 30x60x30" - then it can just fold itself up into
> > that space when they are doing the measuring - and stretch it's
> > legs outwards after the start.
> >
> > Climbing a standard step (which is about 20cm) with a 30cm tall robot
> > seems pretty tricky to me.
> >
> > Something like the "Shrimp" might do it...but the requirement to move
> > along a surface that's higher on one side than the other would be hard
> > for a Shrimp to manage.
> >
> > I think the idea of a long legged robot would be the answer...especially
> > if the rules allow it to start off folded up into the 30cm height limit
> > and then stretch out to (say) twice that size to give it a chance to
> > climb a 20cm step.
> >
> > > And we can have 620 Euro's...
> >
> > So that's about US$620...that's quite a generous limit!
> >
> > That'll buy quite a bit of Lego (at US prices) - so you could certainly
> > consider a dual-RCX design with a butt-load of Pneumatics (unless Lego
> > is vastly expensive in your part of the planet).
> >
> > ----------------------------- Steve Baker -------------------------------
> > Mail : <sjbaker1@airmail.net> WorkMail: <sjbaker@link.com>
> > URLs : http://www.sjbaker.org
> > http://plib.sf.net http://tuxaqfh.sf.net http://tuxkart.sf.net
> > http://prettypoly.sf.net http://freeglut.sf.net
> > http://toobular.sf.net http://lodestone.sf.net
> >
> >
> >
>
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Message has 1 Reply:
 | | Re: Need to compare
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| (...) A straight tri-wheel like that can't climb anything higher than half it's height though. If you are really after something that'll climb TALL steps, then it has to have something high up at the front to grab the top of the step with. Even a (...) (22 years ago, 28-Sep-02, to lugnet.robotics)
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Message is in Reply To:
| | Re: Need to compare
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| (...) Is that the *initial* dimensions - or the *maximum* dimensions? If it's just one of those things like "the robot must start off in a box no bigger than 30x60x30" - then it can just fold itself up into that space when they are doing the (...) (22 years ago, 28-Sep-02, to lugnet.robotics)
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