This is a very common problem experienced by most welders. These malfunctions can cause a lot of time wastage. The two common wire feeding problems are:
1. Burn back: This happens when the wire feeding speed is slow. The flux core welding wire melts into a form of a ball on the contact tip.
This can also be caused by positioning the gun too close to the metal being on. To prevent this from occurring, ensure that you feed speed is correct and maintain distance of 1 ¼ inch.
2. Birdnesting: This happens when the arc is extinguished prematurely. To prevent this from happening use V or U groove drive rolls in the wire feeder. This occurs when a wire is tangled hence hindering wire from being fed.
Birdnesting can also be caused by blockages in the inner liner or usage of a wrong liner.
Conduct a routine inspection on your welding gun and ensure that you use the correct tools to trim the liner. The liners shouldn’t have any sharp edges.