> Robin Whittle wrote:
>
> From the thread: "Kepro bench top spray etcher":
>
> An eBay search for:
>
> magnetic pump
>
> produces hundreds of results, some of them for
> small pumps costing less than $100. Sorting
> by "price with shipping" groups similar products
> together.
>
> <SNIP - all th details on pumps and prices>
Quite coincidental timing here really.
I have just a few weeks ago finished the rotary
spray etcher I started in 2006 and am almost done
with my photo laser plotter started at the same
time. (I'm getting better only 5 years behind
schedule)
I am about to publish the details of both. So
you might want to hold of spending $100s on pumps
for a few weeks.
The whole spray etcher can be built sub $30 if
you have a table saw ($40-$50 ish without)
It has a couple of sneaky tricks to sort out the
uniformity/banding issues Stefan Trethan had
when trying to build his (ref 1).
I built mine to accommodate 75x150mm boards. It
could scale up a bit. But if you where planing
doing big boards, I would opt for following
Adam Seychells design (ref 2).
BTW, does anyone have an archive of Adams work
aside from the CuCl bit?
1.
http://tech.groups.yahoo.com/group/Homebrew_PCBs/message/85792.
http://web.archive.org/web/20090103105924/http://members.optusnet.com.au/~eseychell/PCB/SprayEtcher/index.html