Why does my welder keep burning back?

Burn back is also very common. It results when a weld forms in the contact tip. It usually occurs when the wire is fed too slowly or the MIG gun is held too close to the base metal. To correct burn back, increase the wire feed speed and lengthen the distance of the MIG gun from the workpiece.

How do you not burn metal when welding?

To prevent burn-through and warping, don’t whip or weave the torch; the more time the arc is in an area, the hotter it becomes. Always travel in a straight line and use the fastest travel speed possible that maintains a good bead profile. Another way to prevent burn-through is to use a push technique of the MIG gun.

How do you prevent a burn from stick welding?

The arc is more concentrated and it can easily make a hole in your material. If you keep getting holes in your weld, try angling the electrode so the heat is more diffused. It will prevent burn through most of the time. With this being said, you don’t want too shallow of an electrode angle.

Why is my MIG welder sputtering?

As the contact tip absorbs the heat from the arc, it loses its ability to transfer the current to the wire. This results in increasingly poor welding performance. This increased voltage causes the popping and sputtering that leads to poor and inconsistent weld quality.

What is keyhole welding?

A technique in which a concentrated heat source penetrates partially or completely through a workpiece, forming a hole (keyhole) at the leading edge of the weld pool. As the heat source progresses, the molten metal fills in behind the hole to form the weld bead.

How thin can you arc weld?

What is the thinnest metal you can stick weld? With some experience, you can stick weld 3/32″ (2.4mm) mild steel with acceptable results. A welder with a lot of knowledge about heat control can stick weld down to 1/16″ (1.6mm) thin metal or even less.

What is weld crack?

Weld cracking refers to a depression left at the termination of a weld where the weld pool is left unfilled. Most forms of weld cracking result from the shrinkage strains that occur as the weld metal cools.