Patent ID: 7248014
Filing Date: 2007-07-24
Classification: G05B

Abstract:
1. A motor control system for controlling a servomotor for driving a driven member through a transmission mechanism for mechanically connecting the servomotor and the driven member, comprising: a servo controller having a position control section for performing position control processing for feedback controlling a position of the driven member, and a velocity control section for performing velocity control processing for feedback controlling a velocity of the driven member; a host controller for issuing a position command commanding a position of the driven member to said servo controller, and outputting information on operation constants for the position control processing by the position control section and/or the velocity control processing by the velocity control section, to be corresponding to the commanded position; and operation constant varying unit for varying operation constants for the position control processing and/or the velocity control processing in accordance with the information on the operation constants outputted from said host controller, wherein the driven member comprises a mold of an electric press machine for performing a press work, and the operation constants have different values in the vicinity of a bottom dead point where the press work is performed and in the vicinity of a top dead point where the press work is not performed.