METHOD OF REMOVING FOLLOW-UP DELAY IN A FULL-CLOSE FEEDBACK NC SYSTEM

摘要

A method of removing follow-up delay in a full-close feedback NC system, wherein an instruction signal is corrected in the following manner when the direction of movement is inverted. That is, when a backlash quantity in the mechanical system is denoted by ΔX, a position gain of the servo system by Pg, and a correction coefficient by K, the correction quantity (Xc) is determined to be K.ΔX, and the correction time (Tc) is determined to be l:Pg:K. This correction makes it possible to control the position of the table of a machine tool maintaining high precision and permitting little error in position to develop.