Which motion is typically used for the torch during GTAW?

In Gas Tungsten Arc Welding (GTAW), the torch motion is critical to achieving high-quality welds. The typical motion used for the torch is a steady and controlled linear or circular motion. This precise movement helps maintain an even arc length, which is essential for consistent melting of the base and filler materials, and for ensuring proper penetration and fusion of the weld.

Using a steady motion allows the welder to better control the heat input to the workpiece, minimizing the risk of overheating or underheating any specific areas. It also facilitates a more uniform transfer of the filler material into the weld pool. Circular movements can be particularly effective in creating rounded welds and often help in achieving a desired bead profile.

In contrast, other motions like random flicking or rapid jerking would lead to inconsistent arc length and control, likely resulting in poor weld quality. Spiral motions might not provide adequate control to establish a strong bond between the materials being welded. Thus, adopting a steady and controlled approach is vital for effective GTAW welding.