hi,
Just bought a second hand one of these,
two easy questions.
1/ does any one have a link to the users manuel ??
2/ in the photo below, what does the knob in the top left do???
It simply controls how much wire is left sticking out of the tip when you cease welding, too little and it may stick to the tip, too much and you'll have to cut the excess off before starting the next weld.
You control the arc length by holding the torch closer to or further from the workpiece.