Homebrew PCBs

On Wed, 17 Mar 2004 06:30:15 -0800 (PST), pebo festus <mebo31@...> 
wrote:

> with the experence i have had with the II, it will not
> work,the the roller feed IMHO is just to sloppy.but
> you might find a work around. i have got to get the
> right resist through the printer working before going
> to the next hurtle.
> mebo
>
>

I would have guessed it does work.
there is a optical sensor for the paper edge in hp printers, one
would expect epson to use a similar system.

then you only need to adjust the other distance, which would be much easier
with a real "table" for the pcb.
(e.g. a pig plate that is moved by the rollers)

even with a piece of paper it is hard to print on the same spot twice,
but i think it would work properly if you make a flat carriage on a rail
in the center, just let the carriage rest on the drive roller.... (use
small pressure wheels on the side to keep contact to the rollers)
for a rail one could use a drawer slide, or simply a piece of steel and
a brass bracket soldered/glued to the underside of the pcb which forms the 
carriage.


i do think the printer starts to print a exact number of steps after the 
optical
sensor contact and a exact distance away from the border.
It is just a question of putting the pcb in the right place.

ST