I've been trying to mill some .125" copper sheet with my CNC Sherline mill. I have tried 1/8" and 1/4" end mills, increasing rpm, decreasing rpm, slowing down the feed rate and I still am having no end of problems. Besides the really big burrs, I find that the end mill wants to really dig in quite often and of course then the software looses it's place and I end up with more scrap metal. I'm cutting fairly light passes of .010" and my next thought is to decrease even that.
I could sure use some guidance here.