I tried to weld a wire per hand with continuous current. It's not easy to feed the wire fast enough per hand, therefore the sparks. The wire melted in droplets, which welded good to the surface for which I used this time a sheet of metal instead of the fly screen. With stepper motors the wire should melt in a connected line. The energy from the power supply is enough and could maybe be less, but the resistor block gets too hot to touch after a few seconds and would likely fail after minutes. I think the printing speed will later depend on the power used and the power could be regulated through on and off cycles.

Will order more resistors to divide the load between them.

Tested to melt serveral "layers" of wire on top of each other.

The "printed object" welded very good to the surface - could almost lift the buildplate on it until it broke on the weakest spot - I tested to break it in two halves and it was solid and very hard to break - like wire.