Homebrew PCBs

Slavko Kocjancic wrote: 
> 
> I'm start journey to make inkjet head for printing pcb's. As far I
> know all direct print inkjet have problem's with ink and head itself
> is problematic. So I was just trying to make one pixel piezo head
> capable to jet etch resist for making traces and after that to print
> real solder resist mask.

Hi, 

There is something like that available
http://www.microfab.com/equipment/devices.html

I have seen your name in CNC related threads, so if is in your interest,
I remember one long thread of CNC related ideas from one guy which
wanted to use an injector from a modern car diesel engine to build a CNC
solder paste application machine. Interesting at first but stopped at
the idea. I disassembled several diesel machines and repaired them,
mostly big engines, is really fun for me, but all with classical
injection system, newer car engines have constant pressure diesel pump
and an electronically controlled injector with built-in valve. It may
work as the devices above, never play with one but they should have the
pressure valve and the very thin exit hole, so they need to be hacked.

But you may consider an old HP head. Is simpler to build, and you can
find cheap CISS systems on eBay for relevant ones. If you search for
direct inkjet compositions they are mostly if not all for thermal heads.
It can evaporate the solvent making higher solids on surface less on the
inkjet, reducing viscosity and surface tension problems. Time ago when i
was searching for this i found one company which had a custom built
epoxy printer and the photo showed an HP45 head in there. Didn't wrote
down the url and can't find it anymore. And the
guy-who-uses-this-group-to-make-money is selling this heads, you may
find an old HP printer and extract some fun from it. 

Simao