Feedrate control of CNC machines by inverse mapping method

Abstract

Absfrad.In this paper, the inverse mapping method is applied to the federate control of C N C machines to improve the productivity while preserving the machining precision. The contour error, which is directly related to the machining precision, is computed from a recently developed contour e r r o r mo.del with the variable size window. The feedrate is iteratively calculated following the Lyapunov function within a tolerable error bound. The relationship between the feedrate and the contour e r r o r used in the inverse mapping is identified by using a multi-layer neural network. Simulations on circular and involute contours demonstrate the performance of the proposed method.