EDM Trouble

The electrodes need to be just a bit smaller than the drill diameter and hollow with coolant squirting out the end! The electrode just eats away at the outer part of the drill! I have'nt done this for some years so this next bit may be wrong, I think I used steel electrodes, but we had a pillar drill set up with some kind of vibrating head and we felt the electrode through! If it was not smooth, a little more juice was given, if it was spittin fire, we would drop the juice a bit! I would check out the steel electrode, or was it a carbon ferrite thing, sorry, can't remember!

Poco graphite has all kinds of power charts, and tables for figuring that out. Look them up on Google, there in Decator Tx. You might also try hollow graphite electrodes, and make sure your part and electrode are completely submerged under dielectric fluid to help stop any fires, if you cant submerge, then use a flow nozzle over the area your burning. I took a 3 day class at Poco, and if you take the time to figure out the area of your electrode, the power, the on, off time of your power, your amperage, and a few other things, you can get a fast and good burn. You can even control the over burn, and keep the holes a given size. Good luck, some times I found just playing with the parameters wile it was burning was he best way. RM.

It was graphite was it, carbon ferrite thing was close!

Call Charmilles they have great technical support