In actual processing, f is generally expressed in two forms, namely, feed per revolution and feed per minute. Such as F0. 15 F80.

In addition, is constant linear speed machining a kind? . .

During milling, G4 1 and G42 are milling cutter radius interpolation, G4 1 is left compensation, and the cutter is on the left side of the workpiece along the feed direction. G42 is the right compensation. G40 is to cancel interpolation.