In SMAW welding, which welding machine type is primarily used for DC compatibility?

The most relevant option for DC compatibility in SMAW (Shielded Metal Arc Welding) is the inverter. Inverter welding machines are designed to produce both AC and DC output, providing versatility for different welding processes and materials. They are compact, lightweight, and offer precise control over the welding current, making them highly efficient for various applications including SMAW.

While transformers can produce DC by adding a rectifier circuit, they are typically associated with AC output. The rectifier converts AC to DC but is not a standalone welding machine; it must be used in conjunction with another machine type. Generators are often used to provide power in remote settings but can also produce AC or DC, depending on their design.

Thus, the inverter stands out as the equipment type that is primarily utilized for ensuring DC compatibility while also offering other advantageous features for the welder.