SERVO GUN CONTROL DEVICE AND METHOD BY USING SERVO MOTOR IN RESISTANCE SPOT-WELDING SYSTEM

摘要

PURPOSE: A servo gun control device and a method thereof are provided to interface the external devices actively, and to prevent the plate from bending by detecting the wear of the electrode tip with the servo motor. CONSTITUTION: A servo gun control device(10) comprises a timer interface(13) interfacing a timer(20) regulating welding current flowing into electrodes(52,53) of a servo gun(50); a servo drive interface(14) interfacing a servo drive(30) to move the movable electrode back and forth; a robot controller interface(15) interfacing a robot controller(40) to control movement of a robot gun or a welding system; a digital/analog converting unit(11) commanding the speed and the torque to the servo drive directly controlling a servo motor(51) of the servo gun; an analog/digital converting unit(12) digitalizing the torque monitor signals from the servo drive; and a control unit(16) welding the work piece with the servo gun by controlling the interfaces and the converting units.