G94 is "Feedrate in Inches per Minute".
G94 allows the tooling plate to move when the spindle is stopped. The "f" value is how fast the tooling plate will move in inches per minute (ipm).
G94 is used to call tools rapidly into position (g94f300 or g00), or with bar loader, either to pull bar or to control the bar feed rate (g94f30)