I'm a complete newbie. I'm trying to weld box section 40mm x 20mm galvanised steel. To make a gate.
One piece with butt up its open end against the side of another piece - that's where the horizontal top and bottom bars butt agains the uprights, okay?
So - being such a beginner I've been practicing just that weld. To see if I can do it. Can I build this thing? It looks like I can. Just. Horrible messy looking welds and a couple of times I've burned holes through, but I've joined the pieces so's they don't come apart when I bash them with a hammer.
I'm using a cheap SIP stick welder at about 55amps according to the sliding scale pointer and 2.5mm and 2.0mm general purpose electrodes.
I wanted to get 1.6mm sticks but I couldn't find any.
It isn't as I thought it would be - I'm not sure that the bigger electrode isn't better for the job than the smaller one.
So that's my first question: What would you all advise me to use for an electrode? The smallest one I can get, or what?
And the second question: A couple of times there was a bit of a gap where my angle-ground 'edges' test piece butted up against the 'wall' test piece and I found that when the electrode touched that free edge it just burned it away.
I tested this by trying to weld together two edges - got a gaping hole.
You can see it on the pic there.
So the second question: How to weld two 'edges' coming together?
I'll post pics of my test piece. It looks pretty horrible I warn you. I've included a pic showing the end of the stuff so's you can see the thickness and what I've been doing. I invite any comments at all......