Pages 323-324
In NC machining of non-circular contours, where cutter is fed along a straight line intersecting perpendicularly the rotation axis of work piece, the cutter path usually consists of Archimedes's spiral segments, i.e. the polar straight line segments. From machining precision and efficiency point of view, an optimal interpolation principle and a practical algorithm for planar curves are presented. The segment number of the cutter path resulted from the algorithm is not only the fewest but also the interpolation accuracy agrees with the specified value. The validity of the algorithm is well demonstrated through interpolation results to machining of two disc cam profiles.
