METHOD FOR SYNCHRONIZING STARTING POINT AND END POINT IN OPEN NUMERICAL CONTROL SYSTEM, AND SERVO DRIVE

摘要

A method for synchronizing a starting point and an end point in an open numerical control system is used for compensating dynamic time lag in real time. The present application is based on discrete geometry and discrete kinematics and takes the starting point synchronization and end point synchronization of micro line segments ΔL_i (i = l,...,n) in L segmentation as a control target. By way of sending a linkage command to a servo drive by a linkage interface, the method has simple, reliable, high-speed and high-precision synchronization capability for the starting point of a micro line segment ΔL_i; the sampling period of a location loop is finely divided into several control periods, the feed speed and control period are adjusted in real time according to the lag pulse or advance time in the control period, which eliminates the accumulated coordinate axis location errors caused by the lag pulse, thus compensating the profile error generated due to dynamic time lag and realizing the end point synchronization of the micro line segment ΔL_i.