Arc wandering can be mitigated by which of the following practices?

• A. Using a larger welding lead.
• B. Increasing shielding gas flow only.
• C. Changing electrode polarity.
• D. Proper grounding, electrode orientation, and, if needed, re-positioning or re-welding.

Answer: (D)

Arc wandering happens when the arc loses its stable path due to electrical and geometric factors. The most reliable way to keep the arc on target is to establish a solid electrical ground, use proper electrode orientation, and, if needed, reposition or re-weld to re-create a stable arc. A good ground close to the workpiece minimizes stray currents and improper return paths that can pull the arc away. The electrode angle and how you hold it control the arc direction, so keeping the correct orientation helps the arc stay in the bead instead of drifting. If the joint fit or alignment is off, repositioning the pieces or restarting the weld re-establishes a stable arc with the proper standoff and travel. Other adjustments, like increasing shielding gas flow or changing polarity, may affect arc characteristics in some situations but don’t address the fundamental causes of wandering as effectively as grounding and proper technique do.