The big multi kilowatt machines are good for making
really big parts. But we are just making a tiny gear.
You can handle a job like this with a diode, a light bulb,
and a small electrolytic capacitor. I have seen it done
on a modified drill press. The accurate slow feed is
the trickiest part.
We only need to make one female injection mold using EDM,
not a production run of parts.
-Chuck
lothar baier wrote:
toggle quoted message
Show quoted text
i remember years and years ago we had a similar problem with another plastic part, we used a part sprayed graphite on
it and then plated over a layer of copper, this served as a EDM tool, problem was we had to make 3 of them because
they wore out. most EDMs i looked at have 3 parts, the machine itself, a power supply and a pump that circulates and
filters the dielectric fluid, i havent seen a machine with a 50W supply, even the smallest ones are in the KW range,
dont know why they use 3 phase , im not the guy who designed the machine, my guess is that it is better in large
shops where you have numerous machines to distribute the load , i dont know ! check ebay under hansvedt, there is
stuff out there, i have a 19x19ft two story shop, right now filled with the gear hobber, a large floor drill press,
lathe, grinder and some work benches, what i really desire right now is a mill and a surface grinder
