Wire Feed Welding Practice Test

Arc hunting shows up as the arc wandering or hopping along the joint because the arc length is unstable. The most likely culprit is what the wire does right at the tip and the path it travels through inside the torch. The contact tip is where the welding current meets the wire; if the tip is worn, damaged, or not seating the wire properly, the electrical contact and the effective distance from tip to workpiece can change slightly as you weld. That small change in arc length makes the arc shift position.

The conduit liner also plays a direct role. If the liner is damaged, dirty, or has burrs, it creates extra friction or resistance and can cause irregular wire feeding. When the wire doesn’t advance smoothly, the contact point and arc length can fluctuate, producing hunting.

Problems with the drive motor, drive rolls, or the voltage/wire-speed controls tend to show up as obvious feed issues, jams, or broad changes in current rather than a steady, subtle wandering of the arc. So while those can cause other welding symptoms, they’re less likely to produce the specific arc-hunting behavior described here.

To address it, inspect and replace a worn contact tip, clean or replace a damaged conduit liner, and ensure the wire feeds smoothly with proper tension.