The Development of a Microcomputer-based Control System of the Machine for Ultra Thin Sheets Welding

This paper describes a successfully developed CMC-80 microcomputer-based control system of GTAW welding machine for ultra thin sheets welding. ACMC-80 microcomputer is used to control a transsistor power source, a step motor and other equipments, thus the functions as position control, adaptive control, constant current control, current waveform modulation and selection of the welding sequences have been realized. This paper presents the constitution and the function of the system. It introduces also the used method against high frequence interference. The developed control system operates steadily and the welding quality has been obviously raised.