Firstly, I'm a welding novice (if that) so some of what I say could well be nonsense. What I say below has been picked up over the years, from reading, YouTube, etc. It could be wrong.
My understanding of normal arc welding is that, in simple terms, you match the diameter of the rod to the thickness of the metal, at least up to a point. Obviously for thin metals, this is practical and you 'lay down' welds in layers. However, I'm thinking of reasonably thin metal, maybe 4 or 5 mm max. (Obviously you vary current etc. as well.)
Also, for thin material, like a car body, I understand normal arc welding is not really the way to go, and a MIG welder is the tool.
The conventional MIG welder, as I understand it, uses a thin 'wire' electrode which is fed to the weld and there is a bubble of inert gas (CO2) around the weld to keep it 'clean' etc.
I've seen a (new?) gasless MIG welder which has flux up the centre of the wire, it is rate at up to 90A and uses 0.9 mm wire. It is claimed to weld up to 5mm metal.
Now my confusion, I suppose you could lay down several welds but 90A for
0.9 mm wire seems a lot of current.Can anyone help clear up my confusion, please?
I'm half contemplating getting a welder, from time to time it would be useful. My interest would be for semi-structural metal work, not car body work. Making metal brackets etc. Up to 5mm would be nice but I wouldn't need to do thin stuff like car panels. A gasless MIG appeals as it SEEMS more controllable and my dexterity can be a bit off at time. The idea of waving an ARC welder with a stick around doesn't appeal.
The beast I'm looking at is the Clarke one, probably their smallest gasless MIG.