Subject:
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Re: Some brainstorming needed.
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 12 Mar 2004 20:28:15 GMT
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Viewed:
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956 times
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In lugnet.robotics, Steve Baker <sjbaker1@airmail.net> wrote:
> Juergen Stuber wrote:
> > lego-robotics@crynwr.com (Steve Baker) writes:
> >
> > > I've been thinking about trying to build a '3D printer'.
> >
> > how about building a robot that uses a pile of 1x1 plates as raw material?
> > These are even easy to come by in the form of mosaics.
>
> Using 1x1's wouldn't permit you to build overhangs or under-cuts.
I've had a 3D graphing calculator on my mind for a long time. Another of my
hobbies is 3D fractals. In the case of the 3D fractals I would make, there
would be no overhangs.
Imagine though that you did not restrict yourself to 1x1 plates. What if you
had support to handle all sized plates, and all sized bricks. This would allow
you to place a single brick instead of three layers of plates, seriously
reducing the total number of parts needed to create the object. The maximum
overhang is limited by the longest plate or brick you can get, but you could
have overhangs.
It would take quite a machine to handle all those brick/plate types, but your
part density would go down and your overhang flexibility would go up.
You'd still be limited to the resolution of 1x1x1/3 because of the smallest
plate.
Kevin
>
> But also, using things that big as the smallest building blocks would
> result in very coarse-looking objects. You also need a heck of a lot
> of them to build a solid 3D object of any size. To build just a 10x10x10
> stud cube, you need 100 of them for each layer and about 22 layers - so you'd
> need 2200 1x1 plates. But then look at building a Lego sculpture or something.
> You don't have the resolution to make a believable looking sculpture in
> just 10x10x10 studs!
>
> No - these machines have to be able to build *anything* that you could
> describe with geometry in a computer. I have seen one of these machines
> building a ship in a bottle by building up both the ship and the bottle
> layer by layer.
>
> Here are some links to the machines I'm thinking about:
>
> http://www.cadinfo.net/editorial/z402.htm
> http://www.ualberta.ca/CNS/3DPRINTER/
> http://news.bbc.co.uk/2/hi/technology/3126625.stm
> http://www.gizmo.com.au/public/News/news.asp?articleid=2578
>
> I understand that I'm not going to have that much resolution using Lego - but
> even producing something fairly lumpy would be impressive.
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Message is in Reply To:
 | | Re: Some brainstorming needed.
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| Juergen Stuber wrote: > lego-robotics@crynwr.com (Steve Baker) writes: > >>I've been thinking about trying to build a '3D printer'. > > how about building a robot that uses a pile of 1x1 plates as raw material? > These are even easy to come by in (...) (20 years ago, 12-Mar-04, to lugnet.robotics)
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