It was not my intention to mislead anyone. Considering the fact that we are talking soft materials here (aluminum, copper, Delrin) plunge feedrate that equals machining one, with high spindle RPM (7k-10K) and pressure cooling, should do no harm...ramping approach either, especially if the machining feedrate is not set close to the inner edge of the "envelope".
Interesting fact is that some CAM programs even have no option for different plunge and machining feedrates.
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