Roger,
how small do you need to go ? probaly smaller than 0.6mm..
pity..
0.6mm Mig welding wire is cheap stiff and freely available.
Mild Steel would be the obvious choice,
it also has a nice copper coating for electrical connection, and the
design for the feed mechanism used in mig welders could possibly also
be used (Two rollers, one with a groove in it, much slower of course)
Chris
--- In Homebrew_PCBs@yahoogroups.com, roger lucas <ralucas4277@...> wrote:
>
> Hi Stefan,
>
> I know that it should have worked in theory, but I was
> surprised at how well it actually turned out.
>
> I tried with tinned copper wire and a tinned steel
> sewing needle (purloined from my wife's needlework
> box), essentially the wear was about the same for
>