Homebrew PCBs

On Fri, 11 Mar 2005 21:38:42 +0100, lists  
<stuart.winsor.lists@...> wrote:

>
> How about PTFE. Not cheap I know but self lubricating and resistant to
> pretty well all chemicals
>


good idea.
But can't be glued, right? would not be easy to affix a bearing block to  
the rest of the tank...
But not impossible i guess...

Maybe a titanium stud can be mounted to the bottom of the tank, and a  
teflon disk fitted in the totating tube, with the 3 holes as described to  
let etchant in and a smaller hole in the middle to accept the titanium  
stud.

As dimensions are no issue titanium round stock and teflon should be cheap  
enough at ebay.

Going that way would need several lengths of electrical tubing until one  
has worked out the right nozzle size and pattern. I would kind of like to  
be sure it works with CuCl and toner transfer before spending any money on  
it...

ST