Re: [CAD_CAM_EDM_DRO] Re: Stereolithography machine

Hi, well this is some good stuff, i think the gathering of uv light might
take some creativity but you guys are onto something worth doing some
research. cul brian f.

----- Original Message -----
From: "Graham Stabler" <eexgs@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, March 29, 2006 4:04 AM
Subject: [CAD_CAM_EDM_DRO] Re: Stereolithography machine


> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "James C. Nugen" <jnugen@...>
> wrote:
> >
> > --- In CAD_CAM_EDM_DRO@yahoogroups.com, Alan Marconett <KM6VV@> wrote:
> > >
> > > I think we need the UV laser stuff first.
> > >
> >
> > It looks like it may be possible to use UV leds instead. I did some
> > Googling and found some info on a particular resin, which mentions
> > 365nm as a quick curing wavelength:
> > http://www.polychm.com/ds14.html
> >
> > Nichia makes UV leds with a peak of 365nm:
> > http://www.nichia.co.jp/product/led-lamp-uv.html
> >
> > And this site describes actual industrial use:
> > http://www.nitride.co.jp/english/uv/jushi.html
> >
> > It may require multiple leds and a lens to get a high enough
> > intensity, but it should work.
> > ---
> > James Nugen
> >
>
>
> Combining lots of LEDs in a useful way so you end up with a tight
> focus is not overly simple. Apart from anything else because they do
> not provide a collimated output the spot size you can achieve is
> limited, unless you use a pin hole or couple into a fibre, both loose
> a lot of light. I guess it might be OK for nano or thin parts but my
> gut feeling is that if you want to make a decent sized object it might
> take a heck of a long time. Again this all assumes a gantry rather
> than a scanning mirror system and that will already decrease the speed
> of an already slow process by a factor of ??
>
> it does make you wonder about direct writing to photo resist on
> standard PCB laminates. Buy a old plotter and run the same program
> with an LED-fibre-lens combo in place of the pen a few times.
>
> Graham
>
>
>
>
>
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