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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Mon, 15 Mar 2004 09:06:49 GMT
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Original-From:
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SIVA Frédéric <FREDERIC.SIVA@stopspammersSWIFT.COM>
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Viewed:
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831 times
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what about putting the demel tool at the end of a lego motor ? To cut thin Balsa, it should be strong enough.
To assemble the layers, I would simply have two central axles on which all layers would be stacked. Those should of course be put at a
place you will not need to cut !
Steve Baker wrote:
> SIVA Frédéric wrote:
> > Don't know how to post on lugnet, so here is a bare mail ...
>
> You can email directly to: lego-robotics@crynwr.com
>
> > Why not having a pile of 1mm plastic sheets, and a kind of 2D plotter that would have a dremmel at the end i.o. a pencil.
> > This plotter would take one layer, and cut out what's required, then place it on top of the previous.
>
> Yes - I had thought about something like that. I was thinking in terms of sheets of thin balsa wood - which could
> probably be cut with the kind of power I could get from a Lego motor. Building a machine to move something as
> heavy as a Dremmel (accurately!) seems like a hard problem for a Lego solution.
>
> Also, I was remembering the machine that uses layers of paper - cutting it with a laser. It seems like I could
> perhaps do that using a sharp scalpel blade in a swivel mount. There are machines that cut vinyl sheets that
> way to make lettering for vehicle and store signs. Many print shops have them.
>
> > To start with, you could even manuall feed the plastic sheets in the plotter, and take them away when finished. Ultimately, you can
> > build a lego feeder.
>
> The problem I have is how those layers get stuck together. The machine that uses paper layers had a roll
> of self-adhesive paper with a backing sheet. As it unrolled the paper, it peeled off the backing sheet
> leaving a sticky underside that it rolled onto the stack of sheets that it had already cut.
>
> One problem is that to build up an object of reasonable size (say 6 inches on a side?), you need hundreds
> of layers - and that sticky-backed paper is EXPENSIVE! I thought about using layers of scotch tape - or
> maybe duct-tape.
>
> > I think even I could do that (one of my first creation was a scanner/plotter, which is not that far
> > from what I suggest here ...)
>
> Right - I've seen several plotters made using Lego - and that's what gives me hope that I could at least
> draw the design on each layer with reasonable precision.
>
> The hard part is figuring out what kind of material to make the layers out of, how to stick them together and
> how to cut them.
>
> Another thought I had this morning was to use a hot glue gun with a finer nozzle to deposit little blobs
> of plastic and build up the object one tiny blob at a time that way.
>
> ---------------------------- Steve Baker -------------------------
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Frédéric SIVA
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Message has 1 Reply:
Message is in Reply To:
 | | Re: Some brainstorming needed.
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| (...) You can email directly to: lego-robotics@crynwr.com (...) Yes - I had thought about something like that. I was thinking in terms of sheets of thin balsa wood - which could probably be cut with the kind of power I could get from a Lego motor. (...) (20 years ago, 12-Mar-04, to lugnet.robotics)
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