Classic Car Weekly (UK)
HOW A TIG WELDER WORKS
1 TIG at a glance
The set-up at the torch end of a TIG welding machine can be seen here. The inert gas column effectively eliminates contaminating oxygen from the weld. The filler material is fed in by hand.
2 Butt-welding tips
TIG welding produces excellent butt welds. Using the pedal to ramp up power on start-up and power down on finishing the weld run assists in preventing blow-through at either end of the weld.
2 Circuit diagram
The machine and workpiece are set up in the depicted manner. The cleaner the workpiece and the earth contact, the more regular the weld and the control of it. Note that here, an additional torch cooling facility is in place.