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OPERATION |
NOTE: All switches described on this page will func- tion only when power source is ON.
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COLD FEED/GAS PURGE SWITCH
Cold Feed and Gas Purge are combined into a single spring centered toggle switch.
To activate Cold Feeding, hold the 
GAS PURGE switch in the UP position. The wire drive
will feed electrode but neither the power source nor the gas solenoid will be energized. Adjust the speed of cold feeding by rotating the WFS knob. Cold feeding, or "cold inching" the electrode is useful for threading the electrode through the gun.
Hold with toggle switch in the DOWN position to acti- vate Gas Purge and let the shielding gas flow. The gas solenoid valve will energize but neither the power source output nor the drive motor will be turned on. The Gas Purge switch is useful for setting the proper flow rate of shielding gas. Flow meters should always be adjusted while the shielding gas is flowing.
LIGHT SWITCH
ON
Turn the internal light switch ON to illuminate the inside of the POWER
FEED® 25M. | LIGHT |
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OFF
2 STEP - 4 STEP - TRIGGER OPERATION
The 2 Step - 4 Step switch changes the | 4 STEP | ||||||
function of the gun trigger. 2 Step trig- | |||||||
ger operation switches the welding out- |
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put |
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trigger. 4 Step trigger operation pro- |
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vides 'trigger interlock' capability and |
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gives the ability to control the amount of |
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time spent in the arc start and arc crater |
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steps. | 2 |
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Place the toggle switch in the UP posi- | |||||||
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tion for 4 Step operation and in the |
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DOWN position for 2 Step operation. |
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The 2 Step - 4 Step trigger has no effect when weld- ing with SMAW or CAG procedures.
2 Step Trigger
2 Step trigger operation is the most common. 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 parameters. 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
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HEATER SWITCH
Turn the heater switch ON to warm the inside of the POWER FEED®
ON
4 Step trigger operation gives the welder additional control in the welding sequence. 4 step trigger allows the welder to choose the arc start, weld and arc end time. It may also be
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25M. The heater is useful for reduc-
ing condensation |
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spool of wire. | OFF |
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lock.
