You do a depth pass of 2.0mm with a 1.0mm end-mill in copper? Sounds pretty ambitious to me. Not saying that it can't be done, but typically faster to do 0.5mm depth cuts per pass and feed at a higher rate, or at least that's what my machinists told me. Had problems enough with the end-mills snapping as it was with 0.5mm depth passes. One end-mill bit lasted about 15-20 blocks.
|