Since the distance between passes is measured along the Z - axis of the Coordinate System, in shallow areas ( with smaller surface inclination angle) the Constant Z strategy is less effective.The image above illustrated the Constant Z finishing. Note that the passes are densely spaced in steep areas. Where the model faces get sallower, the passes become widely spaced, resulting in ineffective machining. Therefore, the machining should be limited by the surface inclination angle to avoid the shallow areas machining. There are can be machined later with a different SolidCAM HSM