Simulation and experimental verification of linear interpolation cutter path error produced by NC servo characteristics of machining center

Abstract

This paper proposes a simulation method for estimating the trajectory error of a linear interpolation cutter path due to the NC Acc/Dec motion around a connection point of two segments for a MC. The algorithm is very simple and efficient for simulation calculation and practical programming. The effectiveness of the method is also evidenced through a detailed comparison of the simulated cutter paths with the measured ones under various motion conditions. As a useful tool, the method is applicable to beforehand estimating the influence of the Acc/Dec procedure characteristics on cutter path accuracy or judging the cutting conditions for the machining purpose without performing an actual machining test on the MC.