What should be done if burn back occurs during welding?

When burn back occurs during MIG welding, it indicates that the wire may be melting back against the contact tip, which can lead to several issues such as poor arcs, inconsistent welding, or even damage to the welding gun. To address burn back, it is essential to check and clean the contact tip to ensure that proper electrical contact is maintained and that molten metal does not adhere to the tip, which can cause further disruptions.

Resetting the tension is also crucial because if the tension on the wire feed rolls is too high or uneven, it can exacerbate burn back issues by not allowing the wire to feed smoothly or consistently. Therefore, cleaning the contact tip and resetting tension can help restore optimal performance and prevent burn back from recurring during welding. This approach targets the root cause of the problem effectively, providing a quick and practical solution to improve the welding process.