Re: [CAD_CAM_EDM_DRO] Re: EDM retrofit

Got it. That makes sense. I knew about using a ram edm to make the
starting hole, but I thought that was only for production work. I've had
one part wire EDM'd, it was a 3/8" square hole in a 2" long piece of CRS
(think of a female to female coupler for a 3/8" drive ratchet), but all I
did was drill a 5/16" hole through and then hand it off to another guy who
used the EDM. I know it uses really thin wire, but I thought it was like
threading a scrollsaw blade when doing scrollwork, where you just stick it
through. It makes sense that sometimes you'd want the hole to be not much
larger than the wire itself.
Michael

On 10/20/07, Jon Elson <elson@...> wrote:
>
> Michael Fagan wrote:
> > Just out of curiosity, unless you're doing loads of production work,
> > wouldn't it make sense to just drill the hole, then manually thread the
> wire
> > through?
> One of the advantages to using EDM is you can cut materials that
> are incredibly hard, or have to be machined in the hard state.
> Think of cutting mounting holes in a tungsten carbide cutting
> insert. EDM does it like cutting butter. You'd need diamonds
> to drill it.
>
> Jon
>
>


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