What is the purpose of a welding gun trigger?

The purpose of a welding gun trigger is to start and stop the welding process. When the trigger is pressed, it activates the welding arc by energizing the power source and simultaneously allows the shielding gas to flow, ensuring proper coverage of the weld area. Releasing the trigger halts the welding arc and stops the gas flow, which is essential for creating a controlled and clean weld. This function is critical for the welder to manage the welding operation effectively, allowing them to focus on maintaining the correct weld speed and position without needing to make constant adjustments manually. Understanding this operational aspect is crucial for successful MIG welding and ensuring consistent weld quality.