Homebrew PCBs

Markus Zingg wrote:

> Hi Adam
> 
> Sorry for the late reply - terribly busy times here.

yea, same with me.

> 
> 
>>Thanks for the descriptions. What are the internal 
>>dimensions of the tanks. 
> 
> 
> They are made to contain 2 and 4.5 liters respectively with a certain
> "security" zone so as I don't have to fill them completely up. The
> dimensions are therefore 4x25x29 cm with side pannels sized 9x30. The
> bigger tank is identical except that it's 9 cm wide. All these
> measures are internal dimesions.
> 

Thats simialr size to mine. For the narrow tanks I'm going 
for 5.5 x 35 cm base and 30 cm high (internal sizes). Liquid 
depth is 25 cm, volume 4.8L. This will process 20 x 30 cm 
panels. The plating tank has a base size of 26 x 35 cm.
After much debating I've decided to go 3 mm PVC for the 
small tanks and 4.5 mm PVC for the acid copper plating and 
spray etching chamber.
I remember talking to you before about wanting to improve 
your etching process. Well I've finnaly got all the parts 
and meterials ready to build my spray etcher and will let 
you know how it goes. The cost of it all wasn't bad as I 
first thought. But since I'm working full time, its 
difficult trying to finish such projects with limited time.


> 
  An outer lip seems
> like a good idea. 

yes, you only put a extra bend at the top of the side 
panels. That really strengthens it up for little extra effort.

> 
> Hmmm, I unfortunately don't understand english good enough to know
> what you mean. If you could make a picuture of that process I'm sure
> it would become much clearer.

yes ok. I'm still designing my own tank system. When I start 
the construction I'll take pictures and make them available 
on the web, just as you have.

Adam