The build is as simple as you could possibly imagine. A plastic adapter was printed to affix a MIG welding nozzle to an existing Elegoo Neptune 2 3D printer. Unfortunately, early attempts failed ...

[Brett] from [Theoretically Practical] has done with his old MIG welder ... and a spot welding timer. Pre-flow starts the flow of shielding gas a moment before energizing the filler wire, while ...