Enclosure for spot welder

thingiverse

For people who love tools, there's a fantastic little device available for spot welding. Traditionally spot welding machines are based on bulky transformers to provide high current. Not this one - it uses an automotive starter battery as a current source and ensures that welding pulses are short in duration (2.6 to 7 ms). This spot welder is small, cheap, and perfect for occasional use. It can be ordered online at https://www.banggood.com/DIY-Portable-Battery-Storage-Spot-Welding-Machine-PCB-Circuit-Board-Welding-Equipment-Spot-Welders-for-18650-26650-12V-p-1646749.html. Like many other devices from China, there is no manual, but usage is straightforward. The spot welder is basically a PCB and leads. This is a bespoke enclosure for the above-referred welder, offering protection and design. Print all three parts, then adjust the connecting-and-welding leads according to the holes in the top part. Tighten the PCB to the bottom part with two self-tapping screws about 3 x 6.5 mm in size. Glue a small piece of transparent plastic on the larger hole from the inside of the top part for viewing the LED. Insert the button part into the top part, and hold it from the outside while placing the top onto the bottom part. Once everything is in place and functioning correctly, use some glue to permanently connect the bottom and top parts.