Lincoln Electric LN-25 User Manual download pdf (Page 22)

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(See Figure B.2)

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The 2 Step - Trigger Interlock

switch changes the function of the

gun trigger. 2 Step trigger opera-

tion turns welding on and off in

direct response to the trigger.

Trigger Interlock operation allows

welding to continue when the trig-

ger is released for comfort on long

welds.

Place the toggle switch in the DOWN position for 2

Step operation or in the UP position for Trigger

Interlock operation.

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2 Step trigger operation is the most common. When

the gun trigger is pulled, the welding power source

energizes the electrode output and the wire feeder

feeds wire for welding. The power source and wire

feeder continue welding until the trigger is released.

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Trigger Interlock operation provides for operator com-

fort when making long welds. When the gun trigger is

first pulled, the welding power source energizes the

output and the wire feeder feeds wire for welding.

The gun trigger is then released while the weld is

made. To stop welding, the gun trigger is pulled

again, and when it is released the welding power

source output turns off and the wire feeder stops feed-

ing wire.

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----------------------------------------------------------------------------

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(See Figure B.2)

The CV/CC switch sets the wire

feed speed control method for the

wire feeder.

In the CV position, the wire feed

speed remains constant during

welding. A steady arc voltage is

regulated by the power source by

adjusting the arc current.

In the CC position, the wire feed

speed varies during welding. The

arc length is maintained by chang-

ing the wire feed speed.

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(See Figure B.2)

When cold feeding, the wire

drive will feed electrode but

neither the power source nor

the gas solenoid will be ener-

gized. Adjust the speed of

cold feeding by rotating the

WFS knob. Cold feeding, or

"cold inching" the electrode is

useful for threading the elec-

trode through the gun.

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Lincoln Electric LN-25 User Manual Page 22

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