Digital control technology and digitalized welding machine is applied. Control system applies Pentium PC. Demonstration program applies Windows platform and Chinese menu guiding. The whole system applies gantry type design. Position changer respectively applies 2 axles or 1 axle position changing mode. Machine hand applies the matching between 3D sliding track system and position changer to realized optimal welding position.
Driving of AC servomotor is controlled by a computer with digital encoder.

Nozzle sensor and laser sensor are used to search and determine the position of work piece. Arc sensing welding seam follow-up system accurately guides the welding gun to weld along the actual welding seam. Mechanical welding gun cleaning oil injection device effectively reduces and removes the spatters attached on welding gun.