Thank you Kmed,
By how much would graphite be better, in terms of wear?....20%, 50% or better?
I have experimented ones, many years ago with harder beryllium type copper, or whatever it's called, also with graphite, but it did not appear to make any difference.
Actually, I just tried yesterday again with graphite again....had some laying around when we had to
machine some rings, same thing, wear was still about 30%
But then, I don't know, if I had the right grade???
Does it make that much of a difference in what grade you are using??
Material to be edm'd is QT 100 Plate, similar to 4140H.
I'm thinking, to mount all 8 electrodes on a plate, that way, the pockets will be done at ones.
With today's machine, one could get away with only one electrode,.... so what they say?
Do I miss something, in the setting of the machine???
I always make sure, that I use just enough power to get it to spark nicely, keep the amps as low
as possible, and use a coarse setting when roughing. Is this the Idea??
thanks,
Konrad  |