In "Re: pcb-specific laminator/exposure/etc printer...", on 2012-07-01,
tda7000 wrote:
> Much easier to do this, I would think:
>
> http://www.youtube.com/watch?v=fi4P-Bwc6g8
>
> http://www.das-labor.org/wiki/LaserExposer
This looks difficult to do, by most standards, since there is customised
hardware and two microcontrollers. There would be significant problems
calibrating it, correcting for the out-of-focus laser beam and the
non-linear sweep across the board.
Also, I think it would be difficult to align exposures for double-sided
compared to the alternative of aligning two phototools (or perhaps
transfer paper with toner) facing each other, and then slipping the PCB
material in between them.
I think it is a really great project, but I don't feel inclined to do
all this work myself.
- Robin