What does the term "arc length" refer to in welding?

Arc length in welding is defined as the distance between the electrode and the workpiece. This distance plays a crucial role in the welding process as it affects the quality of the weld, the heat input, and the stability of the arc. When the arc length is too long, it can lead to an unstable arc and increase the risk of defects in the weld, such as poor penetration or excessive spatter. Conversely, if the arc length is too short, it may cause the electrode to stick to the workpiece.

Therefore, maintaining the correct arc length is essential for achieving optimal welding results, ensuring that the heat is distributed appropriately and that the weld is strong and durable. Understanding this concept is critical for welders, as it directly impacts the efficiency and effectiveness of their welding practices.