Increase The Wire Speed

[Onoff]

set 3 from left 1 and 3 strips are your best

try a different angle before you change settings again sometimes direct to the weld is putting in too much heat therefopre melts the steel your welding up

A 2 lower your speed to 4 or 4.5

also again change your angle that your welding at

what thickness are you welding ?

as it looks thinner then 3mm box section

Thanks, good tips. The box is 2mm thick.

 

[gaz1]

your other welds are saying you have too much speed on your wire so are high profiled

set 3 weld 1 and 3 are saying you have close enough speed or your moving faster with your hand as it looks more of a flater weld

 

[Turbo]

Your wire speed has quite an effect on the heat of the weld pool & on a welder like yours with limited voltage settings you can use the wire speed to fine tune the weld penetration.
Basically the lower the wire speed the hotter the weld pool, raise the wire speed you cool the pool down. It will just be a matter of playing around to achieve the best setting.
I would suggest you practice on a bit of scrap plate the same thickness as you box section.

 

[Onoff]

Maybe there's hope if not consistency:

 

[Onoff]

a welder like yours with limited voltage settings

I'd be interested to try a "proper", inverter MIG. Synergic are they? Figure persevere with this old beast first.

 

[addjunkie]

Id say your issue is technique. That fillet looks a tad cold, are you pushing or pulling the torch? Looks like your weaving too, but not getting up the side enough. Molten metal flows down hill. Try straight runs no weave aimed more tothe side than the bottom, pushing. Use both hands left to steady the torch, and get your head in close so you can actually see what happening!

 

[Onoff]

Id say your issue is technique.

You sound like SWMBO!

I'm pulling btw. I wasn't intentionally weaving, that was me trying to go in a a straight line.

 

[Wozzaaah]

Why are you pulling?

 

[Onoff]

Why are you pulling?

I always have.....never tried pushing.

 

[gerrymoore]

I've welded for 40 or more (arhggg) years (self taught) and always 'pulled' ....never really had any problems either??

 

[Munkul]

Both are ok techniques as long as the angle is close to 90 degrees. But you can stay on the leading edge of the puddle and see what you're doing more easily if you push. And it makes a big difference if you're on aluminium.

 

[chrismac]

I'd be pushing that too.

 

[Onoff]

I'm a pusher from now on!

Slightly better results aka still cr@p with the odd glimmer of hope :

This is about the best I'm getting:

Tbh though I'm grinding them all down o/of embarrassment!

What should have been a five hour job more like 5 weeks!

Today's fun is continue to weld and clean up some previous attempts / redo. These fillets are proving particulary horrible to do. I clearly have to vary the speed or something from when I did the butt joints on the flat.

 

[Gareth J]

Here, as you've moved along the weld, directon of the arrow, the material has heated up. This will naturally happen as you've thin walled box and relatively short runs. Results in a "cold" raised profile potentially with poor penetration at the start and, towards the end, it's getting so hot you've stopped short to avoid undercutting or even blowing through.

I find it hard to mitigate for in this situation, fancy welders have fine tunings available to help I understand but I don't have one of those either. You can, sometimes get a good situation where you tack one corner, (the corner in the foreground of your pic) with the welder pretty hot, then, with it a bit hotter than you have now, run the direction you went in but just when things are getting too melty, you run into/over the original tack that helps keep the last part of the weld intact.

This is all presuming you can manage the distortion ok!