Re: stepper edm

--- In CAD_CAM_EDM_DRO@yahoogroups.com, Thomas J Powderly <tomp-
tag@...> wrote:

>
> Graham,
> IMO the advantage of orbiting is simplification of electrode

manufacture.

> IMO orbiting is NOT faster/better than plunging.

Tom,

on my home-brew edm, it took me approx 15 min to drill the first 1/8"
of a tap.
the next 1/8" took close to an hour.
to plunge to a depth of 1/2" took over 6 hours.

As the electrode progressed the electrolosys increased geometrically.

spinning the electrode with a bent wire a-la Jon Elson's page
eleminates almost all of the electrolosys. orbiting would also work
wonderers.

The magical key is that the electrode has to be as far from a wall as
possible. and that only the cutting edge can be near the work.

In the home brew machine, orbiting would allow one to pee on the
outside with fluid and get much better flushing than with a non-
orbiting.

I cannot speak for the professinal machines, but a rotating or
orbiting electrode on the home-brew can shave hours off a hole.

Dave