4g | Welding Position [extra Quality]

| Defect | Cause | Solution | | :--- | :--- | :--- | | | Travel speed too slow; amperage too high. | Increase travel speed; lower amperage; fill the toe of the weld as you move. | | Overlap (Roll-over) | Puddle too cold or too large; not enough penetration. | Increase voltage slightly; focus arc force on the center of the joint. | | Porosity (Wormholes) | Gas coverage is insufficient (MIG/FCAW). | Move the gun closer to the plate; check for wind drafts; increase gas flow. | | Spatter | Arc length too long; voltage too high for wire speed. | Tighten the arc; tune machine settings (stick-out should be 1/4" to 3/8"). |

For new welders, this is the shocker. In flat welding, you see the puddle clearly. In 4G, the puddle is overhead, so you are looking at the bottom of the puddle. You have to weld based on feel and the sound of the arc (a crisp "frying egg" sound) rather than sight. 4g welding position

The 4G welding position is used in various industries and applications, including: | Defect | Cause | Solution | |