roel_cnc wrote:
> i like the idea of making me own laserplotter.
>
> tested: a pointerlaser (some cheap thing) with an extra focus lense, a
> red sensible film gave me super fine lines (close to a single cloth
> fiber).
>
> did any of us fouling around with this idea !!
>
> tips and suggestions always welcome:)
>
> gr Roel (holland)
>
>
Are you talking a rotating drum laser photoplotter ?
Any idea of suitable low cost (<$5 A3 sheet) red light photosensitive film ?
There is also the problem of developing red light sensitive films!
Alternative is green, blue or even UV laser diodes. Choice depends on
photofilm and laser diode availability. Maybe the best approach is to
look at traditional black&white photographic films, and then decide on
suitable laser diode wavelength. Use common B&W films that are processed
with a standard red safe lights.
At say 20um wide pixel, that gives 15000 drum revolutions to scan a
length of 300mm. If drum spins at 1000 RPM, thats 15 minutes to
complete, which is acceptable.
Regarding film mounting, it is ideal to have the film placed on the
inside of a drum cylinder. The drawback with this approach is building
single sided bearing mount system for the drum. I guess thats all up to
degree of mechanical balancing.
Would be interesting hearing ideas too.
Adam