In these instances, a machine or robot performs the welding tasks, while monitored by a welding machine operator. Welding machine operators set up and operate welding machines, as specified by layouts, work orders, or blueprints. Operators must load parts correctly and constantly monitor the machine to ensure that it produces the desired weld. The work of arc, plasma, and flame cutters is closely related to that of welders. However, instead of joining metals, cutters use the heat from burning gases or an electric arc to cut and trim metal objects to specific dimensions.
Cutters also dismantle large objects, such as ships, railroad cars, automobiles, or aircraft.
Some operate and monitor cutting machines similar to those used by welding machine operators. To protect themselves, they wear safety shoes, goggles, hoods with protective lenses, and other devices designed to prevent burns and eye injuries and for protection from falling objects. Automated welding machine operators are not exposed to as many dangers, however, and a face shield or goggles usually provides adequate protection for these workers. Welders and cutters may work outdoors in inclement weather or indoors, sometimes in a confining area designed to contain sparks and glare. When outdoors, they may work on a scaffold or platform high off the ground.