What can incorrect voltage settings lead to in MIG welding?

Incorrect voltage settings in MIG welding can significantly impact the quality of the weld, leading to poor penetration and inconsistent welds. If the voltage is too low, it may not provide enough energy to properly melt the base materials, resulting in weak or incomplete joints. On the other hand, if the voltage is too high, it can lead to excessive spatter, difficulty in controlling the arc, and an uneven weld bead. This variability can create defects, such as lack of fusion or excessive burn-through, which compromise the integrity and strength of the weld. Achieving the correct voltage setting is crucial for maintaining a stable arc and producing high-quality welds that meet specifications and standards.