We heard a sound, that see this defect on our part. The working tool is 5 carbide inserts, Ø50mm side cutter (Face mill)
depth of cut:2mm
Feed is variable arround 400mm/min-2000mm/min
Spindle Speed = 4200 rev/min
I run the same nc code yesterday and everything was fine.
I wonder the reason of this failure on this image attached to the post.
Chip stuck, unstable stock or bad machine
.The code continued a bit after this failure just fine.