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On Wednesday, May 22, 2019 at 7:50:50 PM UTC-4, Ed Huntress wrote:


John, can you give us a general idea of what the "fairly easy" EDM
power supply is like?

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Ed Huntress

It has been a long long time ago, but what I remember is that we used an
isolation transformer with a dipper and bucket voltage doubler connected
to the output. So that would be a transformer, two diodes, two film
capaciters, and maybe a resister to limit the current when ( not if ) the
electrode shorts to the work. We used a wooden dowel in the drill press so
the drill press was not hot. We used the drill press spindle stops as a
rough adjustment and just leaned on the spindle for the fine feed. Crude
but it worked.

Dan

A good video on building an edm drill is
https://www.youtube.com/watch?v=rpHYBz7ToII. He buys the power supply from
https://baxedm.com/ (not cheap) but I think he had lots of good ideas for
the rest of the system and he covers how it all works and where to get the
parts very well.

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Regards,
Carl Ijames