Subject:
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Re: How much weight can a LEGO chassis carry around?
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 10 Dec 2005 15:22:29 GMT
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Original-From:
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Mr S <szinn_the1@yahoo.comNOMORESPAM>
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Viewed:
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1280 times
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Dan,
I remember seeing this robot. I didn't remember that
you built it, but its impressive.
OT Comment: Can't use $ony products anymore though
I think you underestimate the ability of Lego for
strength. Construction techniques make it possible to
build quite sturdy Lego robots. You do need to be
mindful of the mechanics of structural stresses, but I
think every Lego builder is to some extent or another.
I wish I was not going to be so busy for the next 2
months, but the once per year visit with in-laws and a
day or 5 on the piste is just mandatory to put at the
top of the to-do list this time of year.
One of my projects for next year though is going to be
a Lego robot that can carry a dead weight laptop. Just
to say it can or cannot be done with a regular sized
average type laptop. I'll try to set the record for
load bearing capacity in a Lego robot :) Of course,
anyone is invited to beat me to it as well.
Cheers
--- dan miller <danbmil99@yahoo.com> wrote:
> Apologies if this double-posts, Yahoo is in a mood.
>
> I solved your problem by purchasing the lightest
> laptop I could find, a Sony
> ultralight (PGC 161L, $800 on ebay). It's a hair
> over 2 lbs, and I've used
> it on a couple projects:
>
> http://www.danbmil.com/lego/
>
> It has a built-in camera, which is very cool. The
> last 'bot in these pix
> could locate a bottle (with a pattern of stripes
> taped on it), go to it,
> pick up the bottle and bring it back to me (sort
> of..) It was definitely
> pushing the limit on Lego load-bearing capacity.
> Note the omniwheel casters
> from Charmed Labs. (the laptop sat right behind the
> RCX's, with the top
> flipped up and the camera, which is on this little
> swivel, pointing
> forward).
>
> As for doing it with a regular-sized laptop (6-8
> lbs), I think your best bet
> would be the trailer, but it just might be too big.
> Two sets of double
> wheels each, right near the center of gravity, with
> a caster cantilevered
> out (so it doesn't bear much weight) could do the
> trick. Or pick up the
> Omniwheels, they're pretty cool.
>
> -dbm
>
>
> ps I recently started a platform that uses three
> Lacrosse balls in little
> cages as the wheels. Will post when I get around to
> it.
>
>
> --- steve <sjbaker1@airmail.net> wrote:
>
> > Joe Strout wrote:
> > > In lugnet.robotics, Nathan Colyer • <ncoly1@eq.edu.au> wrote:
> > >
> > > > It might work to make a robot that tows the • laptop on a trailer setup?
> >
> > I don't see how that solves any problems.
> >
> > > Ah, sort of the 18-wheeler approach to carrying • heavy loads. That's not
> > a bad
> > > idea; certainly it solves the axle-support and • skid-steering problems.
> >
> > How? The trailer still has to have a bunch of • axles in order to spread
> > the weight - and when you do that, the trailer is • (in effect)
> > skid-steering.
> >
> > > But it
> > > makes the steering code a much harder problem, • doesn't it? I can
> > imagine my
> > > poor bot getting stuck in a dead-end hallway, • having a hard time turning
> > itself
> > > around.
> >
> > That's the cool thing about using a synchro • platform - the robot can
> > drive in any direction it wants without turning • around (in fact, it
> > *can't* turn around). But it is the ultimate in • manouverability.
> >
>
>
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Message has 1 Reply:
 | | Re: How much weight can a LEGO chassis carry around?
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| If they can build bridges that can take a few something like 28-30 kilos of weight, then handling a laptop is not impossible. It would really be a matter of doubling up load-bearing beams and supporting them with the right structure, being aware of (...) (19 years ago, 10-Dec-05, to lugnet.robotics)
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Message is in Reply To:
| | Re: How much weight can a LEGO chassis carry around?
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| Apologies if this double-posts, Yahoo is in a mood. I solved your problem by purchasing the lightest laptop I could find, a Sony ultralight (PGC 161L, $800 on ebay). It's a hair over 2 lbs, and I've used it on a couple projects: (URL) has a built-in (...) (19 years ago, 10-Dec-05, to lugnet.robotics)
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