Which of the following is NOT a main component of a GTAW setup?

In a Gas Tungsten Arc Welding (GTAW) setup, the primary components include a welding power supply, a torch, and a tungsten electrode. Each of these components plays a vital role in the welding process. The welding power supply provides the necessary electrical energy to generate the arc, while the torch houses the tungsten electrode and allows the welder to manipulate and direct the arc onto the workpiece. The tungsten electrode is crucial as it creates the weld arc and needs to have specific properties to work effectively in the welding process.

A fume extractor, while important for maintaining a safe working environment by removing harmful fumes generated during welding, is not considered a core component of the GTAW process itself. It supports safety and health protocols but does not directly contribute to the welding operation in the same fundamental way as the other components. Therefore, identifying the fume extractor as not being a main component of a GTAW setup is accurate.