PW gun can be applied to ABB, Comau, Fanuc, Kuka, Motoman, Nachi and other robot arm and driver, controller, manufacturer's cable and repair kit. PW series welding gun give priority to stability and lightweight of product working status. Robot soldering pliers make reasonable design of modularization and standardization. Robot single-sided load-supporting robot gun has smaller volume, more humanization installation and debugging, maintenance. Users can choose multiple welding gun arm and drive assy to satisfy requirements of all kinds of robot and welding of any working conditon.