Yes it was 4mm plate x2, and was starting to struggle once going back over a weld, to fill in a slight gap and just to see, as the first weld had increased the thickness over all. You can see the first weld on the lower right is quite clean, compared to the second over the top on weld, on the left, which has small splatter surrounding it. Same settings.
After fiddling with only 3 adjustments, power dial set to max, two switches giving a combination of 4 settings for wire thickness of 0.8mm , and wire tension backed off to almost zero as it was pushing the torch away, it did give a decent results, but only if the torch was moved at the right speed (obviously, but a slight variation of torch speed was very marked)
So it did seem to be the limit of the machine. But with the wire set, I guess only tension and power need adjusting for thinner materials...?
It must have taken 7 or 8 attempts to get there, as the pic, the first leaving one of those dead worms you see on the patio after heavy rain that's then dried up in the sun
which just brushed off with a glove.
Al said the colour of the residual light changed remarkably as we dialled in on the right settings, with purple/blue being evident on a decent weld, compared to yellow originally, and lots of sparks. I could see none of this behind the mask of course, as everything is dark green, just the intensity of a properly white hot weld being evident when all was well.
And talking of the mask, that took some fiddling as well, and trust that it will actually change when you strike on and not blind me. That took several attempts to properly stare at the weld pool with confidence. They are good those solar sell masks, it seems to me. Almost didn't notice it changing as it reacted to the changing light conditions. Impressive.
Good advice on here too. Btw. Thankyou.