ajlelectronics
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I have been experimenting with my welder ready for the chassis repairs. Initially I used the R-Tech recommended figures for 2mm steel which was woefully inadequate. I am test welding on an offcut of the galvanised steel C section after grinding off the zinc. I have kept increasing the power and have not yet managed to blow through despite being nearly at the maximum settings.
Changing to the old rusty piece I cut out, I can blow holes quite easily and need to make the travel speed much higher and weave to avoid it. Even then (of course) I am seeing excessive penetration. The issue I am going to have is joining the two pieces together, with the different settings needed.
Is it just down to the zinc coating on the underside where I can't grind it away?
I suppose that I can concentrate the heat on the galvanised steel and wipe it across. Either that or use lots of overlapping spot welds which seem to penetrate nicely?
Changing to the old rusty piece I cut out, I can blow holes quite easily and need to make the travel speed much higher and weave to avoid it. Even then (of course) I am seeing excessive penetration. The issue I am going to have is joining the two pieces together, with the different settings needed.
Is it just down to the zinc coating on the underside where I can't grind it away?
I suppose that I can concentrate the heat on the galvanised steel and wipe it across. Either that or use lots of overlapping spot welds which seem to penetrate nicely?