Re: [CAD_CAM_EDM_DRO] re:digitizers

the carbide balls are conductive(metalic carbide grains,cobalt binder ,usualy)
the sapphire plates would have to go but depending on the
size you need they could also be replaced with carbide
the newer cermets (ceramic/metal binder) could work also
(not so sure about the oxidation bit)
Brian

> For sensitive systems carbide balls are used with sapphire plates, but that
> obviously won't work for a switch.
>
> I wonder what the hardest metalic conductive material is (that doesn't have
> problems with oxidation)?
>
> Elliot Burke