Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, Brian Goralczyk <bdg0584@...> wrote:
>
> I believe I can explain it.  The agitation of the etchant would
> spead up the process, however what is actually causing the agitation
> is the edges of the board being moved through it.  By the time the
> energy gets to the middle of the board it has dispersed.  It would
> seem to me, that maybe what would work better is a bar that would 
> move back and forth through the etchant right below the surface of 
> the board.  But that is just speculation, and I believe you would 
> want to minimize the verticle movement of the agitating platform.  
> Maybe you could place to rails above the etchant that the agitator
> bar would be connected to and move along.  I see a rather simple 
> setup in my head.


Many years ago (10? 15?) when I used to do a lot more board building,
I had bought a low-cost etch tank that used a pump to move the etchant
over a ramp of sorts, where the pcb was placed.  It worked quite well
as I remember.  I suppose this would be called a wave etch tank.  I
tried to search for this type of tank with no luck.  Does someone
still make these?

Also, someone asked about the laminated copper foil I sell.  The
website is http://www.laserpcb.com