Lincoln Electric IM901-A manual Internal Controls Description, Cold Feed PUSHbUTTON, CV/CC Switch

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b-7

OPERATION

b-7

 

 

 

INTERNAL CONTROLS DESCRIPTION

(See Figure B.2)

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 position 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.

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CV/CC SWITCH

 

 

 

 

 

 

(See Figure B.2)

 

 

 

 

 

 

The CV/CC switch sets the wire

 

 

 

 

 

 

 

 

 

 

 

 

feed speed control method for the

 

 

 

 

 

 

wire feeder.

 

CC

 

 

 

 

 

 

 

 

 

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.

 

CV

 

 

 

 

 

 

 

 

 

In the CC position, the wire feed

 

 

 

 

 

 

speed varies during welding. The

 

 

 

 

 

 

arc length is maintained by chang-

 

 

 

 

 

 

 

 

 

 

 

 

ing the wire feed speed.

 

 

 

 

 

 

COLD FEED PUSHbUTTON

 

 

 

 

 

 

(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.

 

 

 

 

 

 

LN-25™ PRO ACROSS THE ARC MODEL

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Contents Safety Depends on You LN-25PROSafety California Proposition 65 WarningsElectric Shock can kill Welding and Cutting Sparks can Cause fire or explosion IiiPrécautions DE Sûreté Please Examine Carton and Equipment For Damage Immediately On-Line Product RegistrationTAbLE of Contents Installation High Frequency Protection Safety PrecautionsLocation Weld CAbLE SIzECAbLE Connections 3INSTALLATIONA-3Function Pin Wiring Shielding GAS ConnectionProcedure to Install Drive Rolls and Wire Guides Changing the GUN Receiver bUSHINGGUN Connection Pressure ARM AdjustmentLoading Spools of Wire Fe, CrNiAcross the ARC SET-UPS Figure A.5Figure A.7 8INSTALLATIONA-8 Figure A.9Operation Recommended Processes Recommended Power SourcesDefinition of Welding Terms Process LimitationsDescription Case Front Controls See Figure b.1Analog Voltmeter Minimum Arc Volts Maximum WFS Wire Feed Speed KNObWire Feed Speed, CV Operation Extra TorquePolarity LED Internal Controls Figure b.2Internal Controls Description CV/CC SwitchCold Feed PUSHbUTTON Constant Current Wire Welding Figure b-3Itemdescription Rear ControlsFlow Meter POWER-UP SequenceGAS Purge PUSHbUTTON ScfhWire Type AccessoriesFactory Installed Equipment Drive Roll KitsAccessories Kit Accessories K1500-5 Gun Receiver Bushing compatible Installation of the K590-6 Water Cooling KIT Periodic Maintenance MaintenanceRoutine Maintenance CALIbRATION SpecificationModel gearing Wire Feed Speed ValidationTo change the wire feed speed calibration See Figure D.2 BOARDTROUbLESHOOTING Electric Shock can killFault Code Description Possible Adjustments PRObLEMSSymptoms POSSIbLEOutput Problems TROUbLESHOOTING LN-25 PRO Across the ARC DiagramsModel Diagrams Dimension Print LN-25 PRO Across the ARC Model Precaucion Warnung
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