Does Gas Metal Arc Welding (GMAW) utilize Constant Current (CC) or Constant Voltage (CV)?

Gas Metal Arc Welding (GMAW), also known as MIG welding, primarily utilizes Constant Voltage (CV) for its operation. In CV mode, the voltage remains constant while the current can vary according to the weld pool's requirements. This is particularly advantageous in GMAW because it allows for a stable arc length and provides better control over the heat input into the workpiece.

When utilizing CV, any variations in the welding arc length automatically adjust the current accordingly to maintain the preset voltage level. This helps in achieving a consistent weld bead and minimizes the risk of defects such as undercutting or poor bead shape.

The use of CV in GMAW is integral to its efficiency and ease of use, especially for applications that require a clean and aesthetically pleasing weld. Understanding the principles of current and voltage in GMAW is crucial for any welder, as it directly affects the quality and properties of the weld.