Re: [CAD_CAM_EDM_DRO] Re: Free "zprint"

I saw a rapid prototype machine on tv that uses sheets of paper as a medium.
It puts 1 sheet in place, then cuts the shape with a laser. sets another new sheet
on top and repeats the process. They didn't get into the mechanics of the machine
so I'm not sure how the paper sticks to the previous sheet, or how they keep the
laser from cutting only the top sheet, but it recreated a real nice human skull from
some MRI type data. Almost looked like it could be home built.

Bill

stratton@... wrote:

> > > But I could ZPrint that. Of course I'd be making it in corn starch and
> > >wax 8cP
> >
> > Sorry Anne I was half spoofing. Indeed I can imagine a machine that would
> > do that but not in 3 axis.
> >
> > But if you can build it in wax/starch or polymer then you can lost-wax it. :-)
> >
> > [Not necessarily. According to Bathsheba Grossman, who really tried hard to
> > make this work, the wax/starch output of the Z-corp "3d printer" tends to
> > form an unburnable ash that accumulates in blind pockets, leaving voids in
> > the castings. Granted, her configurations were complex, but that's why you
> > use these things in the first place. She finally bought herself a Sanders
> > machine, which deposits a waxy polymer that burns out much better. Check
> > her work out at http://www.protoshape.com She's also offering custom
> > output from her Sanders machine.]
> >
>
> Another licensee of the MIT powder-based technology used by Z Corp is
> Soligen, which offers alumina shells specifically for casting use.
>
> Soligen is at www.soligen.com
> The MIT research group (my employer) is at http://www.mit.edu/activities/tdp/
>
> Chris
>
> --
> Christopher C. Stratton, stratton@...
> Instrument Maker, Horn Player & Engineer
> 22 Adrian Street, Somerville, MA 02143
> http://www.mdc.net/~stratton
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