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10. OPERATION (continued)
10.1.3 AC TIG Welding
The AC TIG welding process is such that the polarity of electrode plus (+) from which cleaning
action is obtained and that of electrode minus (-) in which electrode consumption is small are
inverted alternately to take advantage of the feature of both polarities. This type of welding is
suitable mainly for aluminium welding.
10.1.4 AC-DC TIG Welding
The AC-DC TIG welding process is such that the alternating current period during which
cleaning action is obtained and the direct current period during which deep penetration is
obtained are outputted alternately in a cyclical manner. This type of welding is suitable mainly
for automatic welding of aluminium.
10.1.5 Notice of using AC TIG mode
When using AC TIG mode, observe the followings not to damage the welding power
source
1. Use proper extension cable and use as short cable as possible.
2. When using the extension cable, refer to following figure.
Bind the torch cable and base metal
cable each other with tape.
Straighten the cables as much as
possible.
If cable setting mentioned above
cannot be performed by all means,
lay the torch cable on the base
metal.