Subject:
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Re: challenge: LEGO copier
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 4 Aug 2004 19:41:15 GMT
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Viewed:
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914 times
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In article <I1xouE.LpJ@lugnet.com>,
Mark Tarrabain <markt@SPAMBLOCK.lynx.net> wrote:
> Actually, he said "flat". So I would assume that he meant an assortment
> of bricks simply stuck to one baseplate, sort of like a mosaic.
No, I meant stuck to each other.
> As for brick boundaries... I think the only thing you would need to
> worry about is the boundaries where the colors differ. As long as you
> are allowed any configuration of bricks that produces the designated
> color pattern, it should be very feasable (you could even design it to
> optimize the number of bricks used, actually).
That's what I had in mind too.
> And on the subject of
> colors, the imprecise sensitivity of the LEGO light sensor could likely
> not handle more than 3 colors in total, black, white, and some other
> inbetween one.
I was assuming the use of a camera, not the LEGO light sensor. But
using the light sensor is a clever idea.
> This will almost certainly require more than 1 RCX though... I would
> imagine there to be simply too many states to manage at the same time
> for just 3 outputs.
Here I expose my complete cluelessness with regard to RCX. Its three
outputs are what -- voltage levels? Usually used to drive a motor
directly? If so, does this mean that a robot needs one RCX per every
three degrees of freedom?
Thanks,
- Joe
,------------------------------------------------------------------.
| Joseph J. Strout Check out the Mac Web Directory: |
| joe@strout.net http://www.macwebdir.com |
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Message has 4 Replies:
 | | Re: challenge: LEGO copier
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| Would the bricks be assembled as a wall one brick thick on its side? Like laying a cinderblock wall on its side then creating a copy? That might be done with an X-Y table arrangement with vice like sides at top and bottom of the bricks so that they (...) (20 years ago, 4-Aug-04, to lugnet.robotics)
| | | Re: challenge: LEGO copier
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| (...) There are some clever tricks (diff & ratchet/clutch, muxes) to expand it somewhat for some applications, but in general, yes, a single RCX can drive only three independent pulse-width modulated polarity reversible 9V outputs. -SMQ Shawn (...) (20 years ago, 4-Aug-04, to lugnet.robotics)
| | | Re: challenge: LEGO copier
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| (...) OK, just to clarify: assume an X-Y-Z space with studs sticking up in the Z direction. You mean a model that's only one stud thick in X, arbitrarily wide in Y, and arbitrarily high in Z? Yes, that would be a much simpler problem than what I was (...) (20 years ago, 4-Aug-04, to lugnet.robotics)
| | | Re: challenge: LEGO copier
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| (...) Okay... I think I understand... so you use some 1xN plates or bricks on the top and the bottom of the whole "picture" to hold it together, and the actual construct built can be any size of width N? Or am I still way out there? >> Mark (20 years ago, 4-Aug-04, to lugnet.robotics)
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Message is in Reply To:
| | Re: challenge: LEGO copier
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| (...) Actually, he said "flat". So I would assume that he meant an assortment of bricks simply stuck to one baseplate, sort of like a mosaic. As for brick boundaries... I think the only thing you would need to worry about is the boundaries where the (...) (20 years ago, 4-Aug-04, to lugnet.robotics)
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