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Subject: Re: [Homebrew_PCBs] Re: Solder mask liquid

From: Henry Liu <henryjliu@...>
Date: 2009-09-03

> Henry Liu <henryjliu@...> writes:
>> If you have an Epson Printer, you can just print it out and cure it.
>
> I have an R280 but it's not converted for PCB use. I use it to print
> photofilms and do glossy photos.
>

See my tutorial no modification needed except to your CD tray:
http://www.fullspectrumengineering.com/tutorial.html
You can buy an extra one for $10-15 if you want to keep the original.
Just put in the new cartridge and it prints it.

>> That way and placement accuracy is much better.
>
> How? How can the printer know where the copper is, so it can print in
> the right spots? With film I can visually align the film to the board
> before exposure.
>

In Altium and Eagle you can print the soldermask layer. Invert it to
print black where you want no soldermask.

The Stainless Steel PCB CD Stencil gets your alignment into the
printer every time:
http://www.fullspectrumengineering.com/pcbstep2.html

If you want to do boards bigger than 3.5x2.5 then you are on your own.