What is the function of the trigger on a welding gun?

The function of the trigger on a welding gun is to initiate the welding process. When the trigger is pulled, it activates the welding circuit, allowing the electrical arc to form between the welding wire and the workpiece. This action not only starts the welding arc but also typically engages the wire feed system, causing the welding wire to be fed through the gun and into the weld pool. This is a crucial step in ensuring that welding can begin, making it an essential component of the welding process.

While other functions like adjusting voltage, controlling gas flow, and changing wire feed speed are also important in welding operations, the trigger specifically designs to start the welding arc and control its immediate initiation makes it central to beginning the welding process.