Lincoln Electric IM847-D Wire Feed Speed Knob, GUN Receiver Bushing K1500-2, Trigger Interlock

B-5	OPERATION	B-5
Trigger Interlock

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 feeding wire.

CAUTION

• If the arc goes out while welding with trigger interlock operation, the elec- trode output from the welding power source remains energized and the wire feeder will continue to feed wire until the gun trigger is again pulled

and then released.

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6. WIRE FEED SPEED KNOB

The large, calibrated wire feed speed knob makes for easy and accurate adjustment of the wire feed speed. The knob rotates 3/4 turn. Turn the knob clockwise to increase the wire feed speed, and counter clockwise to reduce the wire feed speed.

The wire feed speed range is 50 to 800 in/min (1.27 -

20.3m/min).

7.GUN RECEIVER BUSHING (K1500-2)

(K1500-2 bushing is standard on all LF-72's)

This Gun Receiver Bushing is used with Lincoln gun connectors, also with Magnum 200/300/400 guns and compatible with Tweco® #4).

8. TRIGGER CONNECTOR 5-PIN AMPHENOL

This is used for connecting the MIG gun trigger.

See Installation Section for detail.

LF-72