F Feedrates or dwell (Fn)

"Fn" can specify linear feedrates (X & Z axes) or rotational feed rates (C axis) or dwell time in seconds.

*G94Fn:*	With G94, the Fn is X or Z axis feedrate in inches per minute
*G95Fn:*	With G95, the Fn is X or Z axis feedrate in inches per revolution of spindle
*CAFn:*	With CA or CI, the Fn is C axis feedrate in inches per minute
*G04Fn:*	With G04, the Fn is seconds that the program will pause (dwell)