Guys, all the greetings. Many years ago, when I started to cook the first joints, like all beginners often get poor penetration. This is normal. At first, your welding is far from the quality and correct for the simple reason that there is no practical experience. But if you do not throw this thing through what - it's time to get will be better and better, which is very pleasing and motivating for further development.
So what is the lack of penetration and how to avoid it? For the simple mention of welding we combine 2 parts by means of the arc heat, which melts the edges most of these parts 2 and to the same pour in this compound with the metal electrode, and welding is obtained the seam. A lack of fusion when this compound is 2 parts welding seam is discontinuous or when the seam is welded to only one of the items. All this can be to try to avoid.
The first reason is a little experience, but over time it is solved!
Then comes the contaminated surface rusty welded parts - everything is simple, Bulgarian, metal brush.
Electrodes substandard and damp, in all textbooks on welding is written that it is necessary to calcine the electrodes in special ovens before welding. Just who they are, these stoves, just need to try to keep in the cold, their electrodes in an apartment or house.
Weak voltage in the network - this is certainly a problem, only then it may be advisable to go to a smaller diameter electrodes.
I would especially like to focus on this because of how little current. Perhaps most of all fusions happens because - because of this. Do not be afraid to add a current, because the normal current probability of incomplete fusion edge is much smaller, and the arc will burn stronger and better treacherous blow slag.
Too rapid movement of the electrode, the metal here just do not have time to heat up and melt. When welding do not need to hurry if you want to normal results.
But all this theory, which will do nothing without practice. Therefore, a well-know theory and practice as much as possible, only then will begin that - it turns out.