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INTERNAL CONTROLS DESCRIPTION
(See Figure B.2)
1.2 STEP - TRIGGER INTERLOCK SWITCh
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 posi- tion for Trigger Interlock operation.
2 Step Trigger
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.
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 feed- ing 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.
2. PRESSuRE ARM and ADJuSTMENT
(SEE INSTALLATION SECTION)
3. OPTIONAL TIMER KIT
The optional Timer Kit provides control of preflow time, burnback, and postflow time.
4. SPOOL RETAINER
To release the spool retainer, squeeze the metal bar inwards. When securing the spool, verify the spool retainer is fully seated in place in one of the three grooves of the spindle.
5. SPOOL bRAKE
Adjust the spool brake to provide enough friction to stop wire overrun. Excessive brake force may cause motor thermal overloads or welding problems.
6. GuN buShING, ThuMb SCREW AND SOCKET hEAD CAP SCREW
(SEE INSTALLATION SECTION)
7. DRIVE ROLLS AND WIRE GuIDES
(SEE INSTALLATION SECTION)
8. COLD FEED PuShbuTTON
When cold feeding, the wire drive will feed electrode but nei- ther the power source nor the gas solenoid will be energized. Adjust the speed of cold feed- ing by rotating the WFS knob. Cold feeding, or "cold inching" the electrode is useful for threading the electrode through the gun.