This book describes the development of a CAM system for the NC machining of triangulated sculptured surfaces in STL (stereo lithography) format using a generalized cutter. Three types of tool path generation algorithms for the machining of STL model, z-map tool path, z-constant contour tool path, and contour-parallel tool path, are included here. The last chapter discusses about the tool path error models that can used for tool path interference detection and raw tool path planning.