Hi Lothar,
The electrode could be something as fancy as a CNC made
graphite model, or it could be something as simple as
adding a little plating to the original plastic gear.
There is no intrinsic reason that an EDM machine should
need 3 phase power, the power requirements for one that
could handle a part this size are very modest... well under
50 watts.
I generate my own 3 phase in my shop. It is easy to do,
and all you need is a big 3 phase motor, and some simple
control components to get it started.
As John said, a silicone mold of the original gear would
be the easiest way.... Damn!.. I wanted an EDM machine.
-Chuck Harris
lothar baier wrote:
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i was eyeballing a EDM for a bit but unfortunatly dont have enough floorspace right now, another problem is that most
EDMs require 3phase current which i dont have out here. There are some benchtop type hansved edms on ebay every once
in a while. Another issue it that you need to have a electrode that resembles the form of the gear made of graphite
or copper and usually those are CNC machined parts
