Homebrew PCBs

Hi ROyce.

Don't know yet.  I am still trying to find a regulator that I can use 
for this and don't have time for the "Search" yet.  I am hoping this 
weekend I will get some time to finish it up.

I did notice though an interesting thing (I am only using water at the 
moment).  There does seem to be a bias as to how the water flows and 
circulates in the tank.

For example, if there are more bubbles on the left side, the flow of 
water is in a circular, clockwise rotation.  This draws the bubbles 
from the right bottom and pulls them towards the left side as they 
rise up.  What I am not sure of is if the bubbles actually do 
the "Scrubbing" or is the "Scubbing" simply a function of the flow of 
etchant.

If the bubbles are doing something, I will be getting some uneven 
etching. I am going to try and modify the baffle a bit so that the 
flow is back to front as opposed to left to right.  I believe this 
would even out the etching.




--- In Homebrew_PCBs@yahoogroups.com, "Royce Pipkins" 
<royce.pipkins@...> wrote:
>
> So what kind of etch times to you get with your super bubbler? We use
> a warming plate and an agitator that simply rocks the solution back
> and forth. No bubbles. We get times in the 5 to 10 minute range
> depending on the cleanness of the soultion.
> 
> 
> Regards
> -- 
> Royce
> 
> ------
> The real problem is not whether machines think but whether men do.
> B. F. Skinner
>