Haas Settings: 79 – 5th-axis Diameter

This is used to set the diameter of the B-axis (0.0 to 50 inches), which the control will use to determine the angular feedrate. The feedrate in a program is always inches per minute (or mm per minute), therefore, the control must know the diameter of the part being machined in the B-axis in order to compute angular feedrate. See setting 34 for 4th axis diameter.