looks like a little over penatration to me, No expert but the discolouration is the heat effected zone which should go 10-20mm around the weld, on you test welds most of them show too much penetration the last two seem about right.
When doing a weld with two bits at 90deg (butt weld) i use a very slight left to right motion whilst dragging the weld pool along. This helps with a low amp welder.
On the really thick stuff, diff mount brackets working vertically top to bottom I was taught to use a V shape motion working down.
As others have said keeping a steady hand by supporting your arm on something helps to get a consistent weld, and I've found getting as close as possible so you can see the weld pool and the line/gap you moving along is key. The amount of welds that I have done that were perfect but go off course!!
I use 2 max for tacking and mostly 2 min for welding, mines a boc migmaster so wire speed is completely different I've never keep up with a setting on 9!!
|