Precision Turning by Means of a Simplified Predictive Function of Machining Error

Abstract This study deals with a compensative system for machining errors in turnings by adopting a simplified predictive function and modifying previous NC commands. The predictive function is represented in the form of an exponential function as an experimental expression and installed into an auto NC programming tool as a database. A NC command is modified by varying its depth of cut from which the motion resolution of a lathe is subtracted everywhere the predicted machining error exceeds the motion resolution. The experimental results support the efficiency of the compensative system proposed in some intermittent metal cutting.