What provides the joint travel in automatic welding?

In automatic welding, joint travel is primarily provided by a combination of mechanical systems, such as a welding manipulator or robot arm, which precisely moves the welding torch along the joint. These systems are often controlled by programmable logic controllers (PLCs) or computer numerical control (CNC) technology, allowing for accurate and repeatable movement. Additional components like conveyors or track systems may also assist in the travel mechanism, ensuring consistent positioning and speed during the welding process.