What should be done if the arc extinguishes during GTAW?

When the arc extinguishes during Gas Tungsten Arc Welding (GTAW), it is essential for the welder to quickly reposition the torch and restart the arc while maintaining control. This action is crucial because the integrity of the weld pool can be compromised if too much time elapses while attempting to restart the arc.

Repositioning the torch promptly allows the welder to regain the necessary control over the heat and the puddle of molten metal. By doing so, the welder can avoid problems such as undercutting or incomplete fusion when the arc is reestablished. Additionally, quick actions often contribute to better weld characteristics, as maintaining the thermal state of the weld pool helps in achieving a uniform bead.

In contrast, stopping all work immediately would halt the welding process unnecessarily and could lead to issues with the completed weld. Allowing the equipment to restart automatically or asking for help before attempting to restart the arc introduces delays that may negatively affect the quality of the weld. Therefore, the emphasis is on swift action and maintaining control to ensure consistency and quality in welding.