> Andrew wrote:
> >
> > I think better results will come from the
> > photo plotter (which is still slowly moving
> > along). Hopefully I will move to the 6/6
> > realm when it is done (maybe even 4/6).
> Adam S wrote:
>
> Are you actually building your own
> photoplotter ? I'm interested how your doing
> it. Is it a rotating drum with a slow scan
> single pass laser ?
Yes - Rotating drum. Single Laser. 15 minutes
a page kinda thing. Just a rehash of the one
John Elson (pico systems) did.
I hope to make it cheap and easy enough for
anyone to make with mainly parts you could get
at places like Jaycar. (cheap and easy are
relative terms I know :D)
Original plan to make it computer system
independant hit some snags and have since
spent a few weeks learning how to write
windows applications (win32 API). It is
coming along very slowly as it also has to
share my time with other projects.
My original estimate was 6 months to finish
and I think I can still make that :D
> Or is it the classic X-Y table with a light
> pen ?
God no - that sounds WAY too hard.
> What are you using for the photosensitive
> film, and what light color sensitivity
> does it have.
Red sensitive photoplotter film. It has
"dual sensitivity" at 635 and 680 nm I think.
Whatever the wavelengths are for common HeNe
and solid state lasers are.
I think it works out something like $5-6 for
a sheet a bit bigger than A3 size. I can't
quite remember exactly though - and I don't
have the details here.
> The red light sensitive films normally used
> in photoplotters can only be handled under
> very dim green light.
Yes - green light safe lights are the go.
I have not found out how sensitve it is to
stray light yet - as I am waiting till I have
finished the scanner before I buy any of the
film.
Does anyone have some spare time they can
lend me :D