Quote Originally Posted by philbur View Post
My issue is the problem of guessing the correct F value when trying to remove material at the fastest rate possible.
I use Machinist Mate software to get in the ballpark of RPM and feed. PCNC also has some kind of calculator on the wizards screen that I haven't looked at.

But don't F10 and F11 still bump the feedrate down and up during motion? That is what I've used during a program, and would work the same with MDI input...

Randy "bump up the feedrate until the cutter snaps and then back off a little"