Jlg
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- Cumbria
That looks goodNige I’m going to strongly disagree with pretty much everything you say mate.
There is simply no reason to compensate good old amps and volts with weaves to achieve fusion in 1G positional welding. Your never gonna see it on a wps and it’s certainly not an important part of mag welding in the 1G position.
Point 1 fusion of both parts of a joint.
Transfer deemed by arc voltage does a much better job of seeing nicely blended toes and sufficient fusion over both parts. If the bead size simply isn’t wide enough for a large joint or thicker gage your going to be producing a miles sounder weld by splitting off into a multi run if the joint desires it.
Point 2 cold lapping.
Refer to point 1 if your welding is cold at the toes you are welding too cold or don’t have your Volts and wire speed matched correct or your wire isn’t fed into the leading edge. Weaving isn’t a fix for this. Setting up correctly is the fix.
Thick to thin again I wouldn’t need to weave and the added extra heat input from doing so will wreck the mechanicals in that thin section. You set your machine up for the thick as you would with all processes and you would weld them together concentrating the arc on the thick and the intensity of the power used will take to and fully fuse the thin.
The only case scenario where I would deem it acceptable to weave would be out of position. Usually a vertically up weld. You haven’t got voltage on your side here to use spray transfer as your fighting gravity so in dip you need that manipulation to blend the toes and keep things hanging on when molten.
Now why do I think you shouldn’t weave. Because it’s reducing your travel speed. That’s a fact. It’s increasing your local heat input. It’s reducing your weld toughness because it’s increasing your grain structure. It’s more likely to cause lack of fusion because it’s done in a colder transfer than a hot straight fast pass put down in solid spray. Your weld looks cold and slow to me.
Please see my example