Which practice leads to better arc stability in welding?

Maintaining a consistent travel speed is crucial for achieving better arc stability in welding. When the travel speed is uniform, it allows for a more controlled welding process. This consistency helps to maintain the proper heat input, ensures a uniform bead appearance, and minimizes the likelihood of defects such as spatter or undercutting. In essence, a steady speed contributes to a more stable arc by allowing the welder to effectively manage the heat and filler material being applied.

The other practices mentioned can introduce variability and may compromise arc stability. For instance, using a larger electrode than necessary can lead to excessive heat input and potential difficulties in controlling the weld pool. A low-amperage setting might not provide sufficient heat for penetration, leading to an erratic arc. Additionally, welding in high wind conditions can disrupt the shielding gas coverage, causing instability in the arc and increasing the likelihood of contamination in the weld. Thus, opting for a consistent travel speed remains the most effective method for enhancing arc stability.