Welders work by hand or by machine when welding. When working manually, welders control all of the work. In semiautomatic welding, the welder uses machinery, such as a wire feeder, to perform welding tasks. Welders start by reading specifications or drawings. If the metal is damaged and needs repair, they analyze the damage.
Welders use their knowledge of metals and welding when planning their work.
They select and set up welding equipment. When the welds are done, welders check that they meet standards. Some welders have more limited duties. They perform routine welds that someone else planned out. These jobs do not require knowledge of all welding techniques.