1, press the foot pedal: refers to the welding operation, the electrician needs to step on the foot pedal of the welding machine, in order to start the current output of the welding machine.
2, press the switch: means that after stepping down the foot pedal, the welder needs to press the switch on the welder to output the current from the welder to the welding electrode.
3, hold down the electrode: after the foot pedal and the switch are pressed down, the welder needs to hold down the welding electrode at the same time, so that it touches the welded workpiece to start the welding operation.