Re: [CAD_CAM_EDM_DRO] Re: EDM troubles - update

What was this stuff from?
I've seen bad servo tuning hammer and create largish flakes in cavities
looking like shavings but they conducted (and were shiny).
Was this stuff passed thru you flushing system?
You got a blowd up filter?
tomp

----- Original Message -----
From: turbulatordude <davemucha@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, August 23, 2003 7:22 AM
Subject: [CAD_CAM_EDM_DRO] Re: EDM troubles - update


> Hi all,
>
> a week or so ago I ran into the problem that by pulling the electrode
> out of the part (dinner time and I didn't want to leave it
> unattended) that I could not resume sparking.
>
> This happened a few times. I tried to wire brush the copper, use
> scand paper, all to no avail.
>
> on a bearing race, I pulled the bearing out and found that in the
> bottom of the cut was a fluffy substance, similar to the stuff at the
> bottom of my water tank.
>
> evidently, by stopping the cut and waiting for some time, the stuffs
> in the water will settle and for some reason that stuff is not
> conductive so does not spark.
>
> a little compressed air and presto! now I gotta paint the ceiling.
>
> now, I can look forward to answering the new-age question of which
> happens faster, edm work or paint drying......
>
> Dave
>
>
>
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
> <davemucha@j...> wrote:
> > Hi all,
> >
> > simple RC EDM unit. after test drilling some holes in steel with a
> > copper electrode, I pulled the electrode out mid spark to inspect
> the
> > progress and now it does not start to spark easily.
> >
> > It went from full voltage to sparking voltage without a spark, then
> > quickly went to a short.
> >
> > do the electrodes get dirty with carbon ?
> >
> > any suggestions ?
> >
> > Sparkless in New Jersey. (Dave)
>
>
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