Stopping MIG Welding Undercut At The Source

This 22-minute tutorial from Weld.com demonstrates how to prevent undercut in GMAW (MIG) welding by addressing root causes. Learn to identify undercut discontinuities at weld toes and discover how machine settings, wire sizes, shielding gas types, and welding techniques affect this common problem. Follow along as experts demonstrate proper gas cylinder handling, compare different shielding gas mixtures, and show how to avoid undercut in various transfer methods including short circuit, spray transfer, and pulse MIG welding. Gain practical insights on managing voltage settings, wire feed speed, heat input for different plate thicknesses, and selecting appropriate wire sizes to achieve clean, defect-free welds.