Hello All,
I'm going to do some 3d profiling in some 7075.
I've got generic 3 flute carbide ball nose end mills.
I've got a Haas VF2 with a 10K spindle. All tools will be mounted in ER32 collets.
I think I'll rough it with my 1/2" ball nose. Speed at 10K rpm and feed at ~100 IPM. Depths of cut will be max 3/8" max width of cut will be 1/4"
I then will semi rough with my 1/4" ball nose. Speed at 10K and feeding at ??
I will leave about 10 thou so it will not be cutting much at all, however in the 'tighter' places I'm not sure how much will be left as the 1/2" may not be able to get in. Could I conceivably feed this at ~100 IPM? (I'll be stepping over at.. 25 thou?)
I will then finish with a 1/8" ball nose. Speed again at 10K and feeding at ??
I think I'll only leave a couple thou for this guy. No idea what type of feed it could manage. This will be a very fine stepover (5 thouish)
I have 2 of the 1/8" otherwise I only have 1 cutter so I really don't want to destroy the 1/4".
Could I skip the 1/4" completely? I also have 1 1/16" ballnose perhaps I should use that?
Thanks!