RE: [CAD_CAM_EDM_DRO] Re: Stereolithography machine

For a cheap UV laser, Google "nitrogen TEA laser"

It is pulsed -- not continuous so you will need some optics to focus it
but it does output a strong beam...

Best feature -- it uses air as the lasing gas and can be built very
cheaply.

Here is a good site for more info:

http://www.technology.niagarac.on.ca/people/mcsele/lasers/LasersTEA.htm

Dave

> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Alan Marconett
> Sent: Saturday, March 25, 2006 5:59 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] Re: Stereolithography machine
>
>
> Hi Skull (?),
>
> I think we need the UV laser stuff first. The XY is easy enough.
>
> They appear to simply do a simple raster scan, so we need to convert
> "drawing" data to a simple raster format. BMP? There is
> software out
> there to do that.
>
> Then the STL controller would read the BMP file and output a
> line at a
> time The UV laser needs to be turned on/off in response to
> each bit in
> the scan line (starting to sound like Jon's photo plotter).
>
> Do a line in say X, then bump up a line in Y, and come back
> in X. After
> every complete "frame", we'd move a little in Z. Similar to way one
> scans with a digitizing probe.
>
> Any ideas on how to build a low cost focused UV laser?
>
> And it sounds like we then flood the work area with fresh epoxy. A
> little PERISTALTIC pump (the company I work for MAKES them)
> can do this
> job. Sounds messy!
>
> REMEMBER, we were just dreaming about home CNC a few years ago!
>
> Alan KM6VV
>
>
> skullworks wrote:
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Mat" <bergson7@...> wrote:
> >
> >>Hello friends
> >>I am trying build small stereolithography machine and we have
> >
> > problem
> >
> >>with Ultra violet laser for it. There are a couple sources for it
> >
> > but at
> >
> >>the moment all of them are quite expensive. I am still searching.
> >>
> >>
> >>Is there anybody who made or tried make this in the past ?
> >>Best regards.
> >>Mat
> >>
> >
> > I have never seen any home built STL machines, this may be
> because it
> > would need its own very unique driver/interpreter - I don't think
> > that anything like EMC or Mach could come close to driving
> that type
> > of system - unless a very special "repost" would convert
> STL into the
> > slice segments needed.
> >
> > But - if a set of drawings and an open source type project were to
> > ever surface...it would jump to the top of my TODO project list.
> >
> > I'm going to WESTEC on tues and will drewl over the
> > STL and other rapid prototype equipment, for now its just another
> > technology I can only dream about (and contract out).
> >
> >
>
>
>
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