gala gar Smart 400 TIG Pulse Manuel Technique D'instructions page 29

Smart 400 TIG Pulse
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3.4.3 TIG OPERATIONS MODE
Three operation modes, namely 2T, 4T and repeating are available for this machine in TIG welding.
Pressing the TIG torch switch indicates "ON" and releasing it indicates "OFF".
Operation of the TIG torch switch
2T operation mode
In 2T mode, the gas valve opens after the torch switch is pressed down. After the pre-flow time ends, discharge
begins to ignite arc, and then the current rises up to the welding current value gradually. When the torch switch is
released, the current begins to drop gradually. When it drops to the pilot arc current value, the current output is cut
off. The gas valve closes when the post-flow time ends, and the welding process ends.
If the torch switch is pressed down during the current downslope process, the current will rise up to the welding
current value, waiting for the torch switch to be released again.