Cu t5.0 / T tc R tc φ 0.3 _12 Cu t5.0 / T tc R tc φ 0.3 Cut the tip of each wire of the thermocouple and weld it to the end of the copper alloy work at 0.3 to 0.5 ms. Spot Welder: HSW-03A Electrode: PSW-TC1, HSW-FB2 and PSW-P1