Machine1,
If you are getting chatter, I would first reduce the sfm, then if needed increase feed. You need to "load" up the tool. And by reducing speed you will increase the chip load. Same for increasing feed.
The other option would be to reduce the depth of cut, but it sounds like that is not an option.
Or if you could use a shorter end mill first, then jump to the long one.
You could if possible cut multiple passes at say .025 to .050 doc at say 1500 - 2000 sfm and something like 100 ipm. I don't know if this is possible with your setup and part.
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(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management) |