RubberDuck
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Is it possible to weld 1.5mm SS sheet with a MIG Double Pulsed and a 1.2mm SS wire?
What shielding gas are you using, have you tried wire
is there anyway you can arrange copper chill bars? large plate of copper behind the weld? there's always going to be distortion with continuous weld i think, i know its a different subject but when i mig car panels sometimes up to i have to use the stitch method and im sure in reality there are tiny pinholes in the weld from all the cold starts even at that i still get some warping
If you are currently using I would try dropping to first, some pulsed MIGs suffer from a arc stability on smaller diameter wires
You will struggle to get rid of distortion totally on sheet stainless steel, Have just been involved in a project where we sprayed CO2 snow onto the underside of the weld to reduce distortion on thin material
Our pulse machines are run on 1.2, not done thinner than stainless with any of them though. Never long runs like that either.
I would think dropping to might help slightly though.
Are the joints that are to be done in flat sheet like that, or do they have any form of strengthening, like folds, might help somewhat....
wire would be optimum. Not 0.8.
I demo Pulse migs for a living and I wouldn't do it with double pulse, it's a much slower process than normal pulse. Slower you travel the more heat will be put in, the worse the distortion.