mhajicek
Diamond
- Joined
- May 11, 2017
- Location
- Maple Grove, MN, USA
I've noticed over many years and different machines of different makes, that small (say 1/32") endmills often overcut, and I need to raise them about .002" to .003" to make them match up with faces cut by larger (over 1/8") cutters. Today I'm matching a fillet cut with a 1/32" ball with a face cut with a 3/16" bull, and had to raise the ball .003", while every other cut in the program matched with no adjustment. I would say it's thermal growth of the spindle due to higher RPM, except the cut only takes a couple minutes and I'm running 1000PSI TSC. Centrifugal expansion of the CAT40 spindle would seem to work in the opposite direction, letting the holder pull up further (hence the pop on toolchange after.) Have you noticed the same thing, and do you have an explanation? Thanks!