Study on the technology of 3D cutter radius compensation based on direction vector

Cutter radius compensation is the key technology in CNC system and is the data sources and basis of contour interpolation. It is the necessary premise to guarantee the part contour according to programming track and cutter radius to plan the tool center path, especially the coordinates of the joint points. The concept of orientation vector is introduced and a technology of 3D cutter radius compensation based on vector method is put forward. The theory and method of cutter radius compensation in coordinates linear processing is studied deeply. The corresponding algorithm of tool center path for programming contour is established according to the relation between the geometric elements. Simulation results proved that the algorithm is accurate and feasible.