If it is fairly draught free then probably about 12l/min for the gas although I have only ever used pure Argon so may be different with AluShield.
Torch should be directed almost straight in with maybe a 5 or 10 degree angle in the direction of travel.
Volts should be high enough that you are into spray transfer rather than dip, adjust the wire feed accordingly.
Looks like it may have pulse on it, either that or it is your technique. Best way I have found is either small circles or a forward backwards forward technique
Extruded aluminium is usually 6000 series. Also there is no 5356 base metal, you're thinking of the filler. Common 5000 series aluminium alloys are 5083, 5251 5754 etc.I'd set it on Synergic, it will get you in the ball park, usually extrusion material is 5356, set pulse or d/pulse, wire diameter, hot start, dial in thickness, then play, my gas is about 7l/min
Looks like 300amp+ machine with water cooled so you've should be ok,
Check with a flow meter at the torch, disconnect wire feed first obviously
Looks a clean decent run to me.I struggle when welding 4mm ali and lower with mig but may be down to the fact I only use 1.2mm 5356 wire. Gas flow I think is usually about 10lpm or a bit higher. I don't usually clean the area with a grinder but tend to use a stainless wire brush just prior to welding.
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I don't know anything about alu mig but I do know , flat out or not , take your time and get it sorted . Sending out substandard stuff just cause the boss says chop chop only looks bad on the person doing the work .
I am not saying your work isn't good only don't get pushed into rushing stuff .
I'd set it on Synergic, it will get you in the ball park, usually extrusion material is 5356, set pulse or d/pulse, wire diameter, hot start, dial in thickness, then play, my gas is about 7l/min
Looks like 300amp+ machine with water cooled so you've should be ok,
Check with a flow meter at the torch, disconnect wire feed first obviously
I struggle when welding 4mm ali and lower with mig but may be down to the fact I only use 1.2mm 5356 wire. Gas flow I think is usually about 10lpm or a bit higher. I don't usually clean the area with a grinder but tend to use a stainless wire brush just prior to welding.
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If the tops only 2mm wouldn't it be easier to tig weld it
Wasn't sure whether the tig set was yours or one that was available at work. Thanks cant really help with current setting as my welder only displays current when welding, but possibly about 260 amps or maybe a bit higher for 6mm
Well....I played around with the settings a little and ended up having to crank the gas flow up to 21 l/pm (very draughty workshop) and it seems to have cured my problem.
Still more trial and error to go but it's on the right track.
First picture was a little cold, adjusted the settings a little and was happier with the result.