Staas & Halsey
Method of involute interpolation in three dimensions
 An involute interpolation method for a computerized numerical control apparatus having a rotational axis and a linear axis is effected by giving commands for a direction in which an involute curve (ICl) rotates, the position of the center of a base circle (BC), the radius (R) of the base circle, and a Z-axis, and interpolating the involute curve (ICl) and the Z-axis according to the commands. Interpolated distances are converted to those along the rotational axis, the linear axis, and the Z-axis for the control of a machine tool (9). 
Fanuc Ltd.
G G
G05B G05B
inventional additional
Masafumi Hideaki Kentaro
Sano Kawamura Fujibayashi