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Tbaker25
in reply to: jeff.walters

I'm continuing to try and refine this problem.

It seems to be mainly be an issue on a 1/32" bit, an 1/8" seems to work okay.

On the 1/32" bit: Square end mill works as advertised. Ball mill continues to mill all surfaces. If I make it a bull nose, the squarer it is, the better the rest machining works. The more rounded it is, the worse it works.

 

Another interesting bit, is that it is actually doing rest machining. It's just doing a final pass over the whole surface, rather than skipping faces which have already been properly machined. But, it doesn't, for example, try to machine the middle of the pocket half way down.