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4. COLD FEED / GAS PURGE SWITCH
5. 2-STEP / 4-STEP TRIGGER SWITCH
Cold Feed and Gas Purge are combined into a two position momentary toggle switch.
To activate Cold Feeding, hold the switch in the UP position. The wire drive will feed electrode but neither the power source nor the gas solenoid will be ener- gized. Keeping the electrode and gun electrically “cold”. Adjust the speed of cold feeding by rotating the WFS knob.
COLD FEED
GAS PURGE
The
2 Step Trigger
2 Step trigger operation is the most com- mon. When the gun trigger is pulled, the welding system (power source and wire feeder) cycles through the arc starting sequence and into the main welding para-
•This feature is useful for threading the electrode through the gun.
•While the “cold feed” circuit is activated, adjust the wire feed speed using the WFS knob.
Hold with toggle switch in the DOWN position to activate Gas Purge and let the shielding gas flow. The gas sole- noid valve will energize but neither the power source out- put nor the drive motor will be turned on. The Gas Purge switch is useful for setting the proper flow rate of shield- ing gas. Flow meters should always be adjusted while the shielding gas is flowing.
meters. The welding system will continue
to weld as long as the gun trigger is activated. Once the trigger is released, the welding system cycles through the arc ending steps.
4-Step Trigger Operation
When the switch is in the
See Sequence of Operation for more information on the overall interaction trigger switch with the weld sequence.
The
