Is used for decide if mm/min (SFM) or mm/rev (FPM) is used
Code: G94 and G95
G94 feed in mm/min (SFM)
G95 feed in mm/rev (FPR)
for milling, the machine uses G94 as standard, do not use G95 (except threading)
For turning, the machine uses G95 as standard, but you can use G94 when needed, eg. threading
Note, those codes is MODAL, they stays on till futher notice)
The MODAL codes stay on until some commando in the same group is commanded