Spot welder part II

Spot weld now very strong with tungsten electrodes

2.4mm tungsten electrodes

I replaced the steel electrodes from my home built spot welder with 2.4 mm tungsten electrodes which I took from my AC/ DC TIG welder. The welding joints are now very strong. It is almost impossible to separate the two metal reeds without damaging it.

What's up next? I still manually trigger the weld and the next tests will be with a time controlled weld with the help of an Arduino. I also have to built a better post to hold the electrodes and some sort of mechanism to adjust the distance of the two electrodes to be able to weld different sizes of rechargeable batteries with variable widths of welding points.