Hi all,
First post here
I am a newbie to cnc Machining. We recently bought a machine to machine Aluminium moulds to make composite parts (Mostly small wings). Using 5mm diameter Ball nosed endmills at about 17k rpm we get great surface finishes. The problem is that during finishing passes (removing 0.2 to 0.4mm of material) the tool slowly pulls out of the ER32 collet and the cuts become deeper by the time it reaches the end of the part.
I assumed that it would be impossible for the tool to pull out with such little loads? Are we doing something wrong or do we just need Hydraulic chucks?
Does anyone have similar experiences?
Thanks a lot.