What is meant by "arc length" in welding?

Arc length in welding refers to the distance between the electrode and the workpiece while the welding operation is taking place. This distance is crucial because it affects the stability of the arc and the characteristics of the weld. A proper arc length ensures that the arc maintains a consistent temperature and energy input, which is essential for producing high-quality welds. If the arc length is too short, it can lead to excessive spatter and may create an unstable arc, while a long arc length can result in poor penetration and weak welds.

Understanding arc length helps welders control the welding process effectively, leading to better weld quality and consistency.