The older Kokek capacitor spot welding machine 3000F, model K7. The circuit board is exposed and during use, it is very afraid of touching electrical components and causing damage. I wanted to design an upper shell to protect the internal circuit. I saw that the new flagship store of Kokek has an optional upper shell, but it is not suitable for the old spot welding machine. I designed this upper shell according to the idea of the new shell (the white part in the picture), which is made casually and is quite tightly sewn, barely usable, and very sturdy.