The main transformer is made of imported high-quality silicon steel, with little power loss and low no-load currentIts exterior use machine-case structure. To transfer pressure, it uses spring pressing structure of lever treadle type. It`s easy to adjust, operate, and maintainWelder`s main return circuit is made of thyristor contactless switch circuit, so can turn off quickly, reliably. The welding timing is precise, with high precise welding, and fine repeating ability, so it can realize high-quality weldingDN1 Serises spot welder is widely used in welding of low carbon steel, line material and stainless steel in industrial production. If can master well the welding timing and current regulation, it can spot weld most of nonferrous metal