Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Steve" <alienrelics@...> wrote:
>
> Sorry.... first test not fully successful. Details here:
> http://www.polyphoto.com/tutorials/DirectInkjetPCBs/index.html
> 
> Next steps:
> 1. Get a better scrubby pad
> 2. Wipe down with 99% isopropyl
> 3. Pre-etch
> 4. Lift the pizza wheels
> 5. Heat the board before printing

Interesting. The board dried a bit overnight. Hot water rinse, the
puddled drops ran right off but most of the ink was rather difficult
to remove fully. On inspection, the 100% black area showed little
lines in the direction of print head travel. Likely not a blocked
nozzle as I ran a nozzle check just before printing. No other colors
showed this banding. It appears that a lot more ink than was needed
got laid down.

Got a better scrubby pad. Scrubbed board with mix of ammonia, filtered
water, and isopropyl until water sheets over all of printable surface.
Rinsed in hot water, rinse in filtered water, final rinse in filtered
water with a small amount of isopropyl added. Dried with clean cotton
towel and a hair drier.

It's currently sitting in my food drier set at 145F.

I am uncertain that I can raise the pizza wheels in the Epson 5000. I
forgot, it was late last night, I noticed that it does not have a
fully straight paper path. When the PCB came out, it was forced to
bend down slightly. I worry that if I remove the pizza wheels, it will
hit something else, and if I merely raise them it will still hit the
pizza wheels.

I may need to drag the 1520 out and load it up with the inks as it's
paper path is straight through. For now, I'll print from the 5000
as-is and disregard streaking from the pizza wheels.

Updated web page.

Steve Greenfield