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#Post#: 50--------------------------------------------------
Starting a new section on Sculpting vs Three D Printing
By: johnfree Date: April 30, 2012, 9:42 am
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I'd like to start and run this group and will do so if anyone is
interested
Basically with sculpting you produce a 3-d statue (thing) by
chipping away stone and revealing that what you wanted was
indeed there inside it!
To make a realistic human head takes about 2 months
(There are many other ways to start and preceed - such as clays
and low temperature ceramics)
With 3-D printing you get infected with the irrational idea of
making it by glueing the pixels together one by one.
Think of .001" size Lego blocks!
It is VERY slow, of course
To make a human head (full size) about 2 months!
3-D printing is today's ultimate hot-air topic on the web
Less than 1% is worth reading BUT some FANTASTIC 3-d models
(printed layer by laver) were recently on show at the V&A museum
London.
You can actually print things IMPOSSIBLE to carve (e.g. ruffled
feathers)
The most successful technique is by laser fusion of powder
The powder is spread layer by layer and a laser x/y scanned to
sinter/fuse the pixels. Then the loose powder is washed or blown
away and you have your magnum opus.
Less successful and most popular is the feed of a plastic
filiament as it melts on passing thru a heated nozzle. The
adhesion between layers is often poor as hot plastic is placed
on the cold layer below.
A vaital step in most schemes is to have a "3-d cloud"
This is basically a LIST of millions of x,y,z locations that are
the exterior surface of the thing you want to make
You feed this list layer by layer in whatever manner your print
mechanism demands (a "format" problem).
The vital question, once you have your "3-d cloud" is what to do
with it!
Feed it to the printer is easier to say than do.
Free download progs like Catch and Sculptris claim to allow you
to create the "3-d cloud" but NEVER in a format accepted by your
printer. You have at THAT stage to pay someone to do that for
you and clean up any mess that Catch left behind.
Please reply with your ideas and suggestions as to the type of
Sculpting and 3-d Printing section you would like to see here,
or help create!
John
#Post#: 52--------------------------------------------------
Re: Styarting a new section on Sculpting vs Three D Printing
By: axlyon Date: April 30, 2012, 11:46 am
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well, theres this program called lego digital designer that
combines legos and 3D modeling, google lego design by me and you
can buy the sets direct from lego
#Post#: 53--------------------------------------------------
Re: Starting a new section on Sculpting vs Three D Printing
By: johnfree Date: April 30, 2012, 11:59 am
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Yes, that's the idea but the lego blocks are pixel-resolution
size.
You are virtually FORCED to design it to be built layer by layer
(with supports where needed) from the ground up in 3-d printing.
In lego you can build whole walls towers and turrets one at a
time or not, as you wish.
It all reminds me of how much FUN I had building model railway
tracks.
BUT
Then I had the BRILLIANT idea of a computer prog that offered me
ALL the tracks POSSIBLE with my set of rails or any partof it.
It drew all the layouts onscreen and I NEVER ENJOYED creating my
own layouts ever again!
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