Which type of SMAW welding machine provides both AC and DC current for welding?

The Transformer/Rectifier welding machine is designed to provide both AC and DC current, making it suitable for a variety of welding applications. This machine works by first stepping down the high voltage AC power from the electrical supply using a transformer. After the voltage is reduced, the rectifier converts the AC power into DC power. This capability enables welders to easily switch between using AC and DC, which is essential for different tasks and materials, offering versatility and improved weld quality for particular applications.

While other types of machines, such as inverters and generators, can offer specific functionalities, the Transformer/Rectifier specifically combines the functions of transforming and rectifying electricity to provide both alternating and direct current. Inverters generally are more advanced and compact and can also provide AC or DC but typically need additional equipment to switch between the two. Generators usually produce AC power but may require further conversion to provide DC power, as they are primarily designed for power generation rather than welding. Similarly, while power supplies can provide both currents, they often refer to more generalized electrical equipment and aren’t specifically tailored for welding like the Transformer/Rectifier is.