Subject:
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Re: Was: Some brainstorming needed, now...
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 3 May 2005 05:54:31 GMT
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Original-From:
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Steve Baker <SJBAKER1@AIRMAILspamless.NET>
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Viewed:
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1188 times
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Dan Novy wrote:
> Remember the thread about building a 3D printer, or rapid prototyper?
> Well, some one did it. With Mechano, not Lego, but still very cool.
>
> http://blog.rebang.com/index.php?p=101
>
> and the winner as a material was.... HOT GLUE!!! We were on to
> something! Glad someone baked this one.
Woah there. Be careful - if you read the full description:
1) It's not a general purpose machine - the guy only implemented
a simple turntable and a system that lowers the turntable at
a constant rate as it rotates. All he can make is hollow
cylinders.
2) He's quite clear on the fact that hot glue is a poor choice of
material - the end results are blobby and bendy with a lot of
oozing between layers.
3) Necessary cleanup of the machine after each run sounds like a
major pain. He talks about needing to wash everything down with
boiling water - so this isn't going to be a Lego machine anytime
soon!
However, it probably wouldn't be that hard to add another degree of
freedom to allow it to build other shapes (well, it would be difficult
with Meccano because they have no computer and no sensors). He has
solved several interesting and tricky problems for a hot glue solution:
* He's dealt with the problem of building a mechanism to feed a
succession of glue sticks into the gun.
* He's figured out the extremely delicate balance of voltage fed to
the glue gun versus feed rate versus glue application speed versus
cooling fan speed versus layer thickness. That seems like a difficult
juggling act.
So, this is an interesting advance - but it's still VERY far from
an actual solution.
---------------------------- Steve Baker -------------------------
HomeEmail: <sjbaker1@airmail.net> WorkEmail: <sjbaker@link.com>
HomePage : http://www.sjbaker.org
Projects : http://plib.sf.net http://tuxaqfh.sf.net
http://tuxkart.sf.net http://prettypoly.sf.net
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Message is in Reply To:
 | | Was: Some brainstorming needed, now...
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| Remember the thread about building a 3D printer, or rapid prototyper? Well, some one did it. With Mechano, not Lego, but still very cool. (URL) the winner as a material was.... HOT GLUE!!! We were on to something! Glad someone baked this one. (20 years ago, 2-May-05, to lugnet.robotics)
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