gala gar Smart 400 TIG Pulse Manual Técnico De Instrucciones página 31

Spot welding operation mode
In spot welding mode discharge begins to ignite arc after the torch switch is pressed down. After arc is ignited
successfully, the welding current is output .now no matter the torch switch is on or off, the machine still output
welding current.When the spot welding time you have set is over ,the arc will be extinguished. The gas valve closes
when the post-flow time ends, and the welding process ends.
HF arc ignition is available for the above four modes. This welder is also equipped with lift arc ignition, that is to
say arc ignition is firstly to let the tungsten electrode short-circuits the workpiece; the short circuit current is kept at a
small level; heat the tungsten; when tungsten is lifted and leave the workpiece, current can be switched to arc ignition
current in a short time and ignite the arc. The biggest advantage of this method is to avoid HF interference and lower
workpiece's tungsten pollution. But when compared with HF arc ignition, it is of lower successful rate. If unnecessary,
please take HF arc ignition as your first choice.
Lift arc ignition is not available in spot welding.
3.5 WORK AFTER WELDING

Shut off the main switch of the cylinder firstly and then switch the power off if shield gas was used.

Turn off the air switch on the welding machine firstly and then switch off the power in the switching box when
shutting off the power.

Cut off the power of the welding machine 3~5min after the welding work is finished, so as to cool the
internal of the machine.
Smart 400 TIG Pulse
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