need some welding help/advise Options

[Jeroen]

ok... having some trouble making nice welds
well, partially

below is a pic of a recent weld
usually, I can get a nice weld going. good penetration etc.
and then out of the blue, it'll start sputtering and globs of weld start to stack making thick ugly welds

what's my problem?
- hand/eye coordination
- wire speed
- amp setting

any tips/pointers?
please help me out... I hate the look of ugly welds and it's a huge PITA to grind 'm out and start over

[bondo]

Is that weld thru primer or regular paint? If it's paint, get it outta there! Get it ground to good clean steel a couple centimeters from the area to be welded, and your results will be better. Even if it is weld thru primer, it still helps to get it off, when you can.

Aside from that, adding heat or reducing wire speed will lessen that, but of course you can go too far the other way. I like to adjust my welder to the point that if I stop in one spot it'll burn a hole. That way when I'm welding I'm always at the verge of burning through, but I get good penetration. Also, the extra heat seems to help burn off impurities ahead of the weld.