Lincoln Electric IM847-D manual Remote Voltage Control KIT, Burnback and Postflow Timer KIT

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B-4

OPERATION

B-4

 

 

 

1. REMOTE VOLTAGE CONTROL KIT

The optional remote voltage control kit adjusts the arc voltage from the minimum to the maximum volt- age of the welding power source. Rotate the knob counterclockwise to reduce the arc voltage and rotate the knob clockwise to raise the arc voltage.

2. BURNBACK AND POSTFLOW TIMER KIT

The optional Burnback and Postflow Timer Kit gives control over the shielding gas at the end of the weld and prepares the end of the wire for the next arc start. Additional shielding gas protection is often required when welding aluminum, stainless steel or exotic alloys.

When stitch welding, set the postflow time to maxi- mum for best results.

Burnback Timer

The burnback timer range is OFF to 0.25 seconds. The burnback timer controls the additional amount of time the power source output remains ON after the wire drive has stopped feeding wire. Burnback adjustment prevents the wire from sticking to the weld at the end of a weld and helps to condition the wire for the next weld.

To set the burnback time, adjust the knob to approxi- mately 0.03 seconds and then decrease or increase the time as desired.

Postflow Timer

The postflow timer range is OFF to 10 seconds. Postflow is the time from when the power source out- put turns OFF until the postflow timer expires. Use postflow to protect the weld while the weld cools.

3. THERMAL LED, MOTOR OVERLOAD

The thermal light illuminates when the wire drive motor draws too much current. If the thermal light illu- minates, the wire drive will automatically shutdown for up to 30 seconds to allow the motor to cool. To start welding again, release the gun trigger, inspect the gun cable, liner (and conduit). Clean and make repairs as necessary. Start welding again when the problem has been safely resolved.

For best results, keep the gun cable and conduit as straight as possible. Perform regular maintenance and cleaning on the gun liner, conduit and gun. Always use quality electrode, such as L-50 or L-56 from Lincoln Electric.

4. 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 switch in the UP position. 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 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.

5. 2 STEP - TRIGGER INTERLOCK SWITCH

The 2 Step - Trigger Interlock switch changes the function of the gun trigger. 2 Step trigger operation turns welding on and off in direct response to the trigger. Trigger Interlock operation allows weld- ing to continue when the trigger 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.

LF-72

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Contents LF-72 Wire Feeder Safety California Proposition 65 WarningsElectric Shock can kill Welding and Cutting Sparks can Cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcTable of Contents Thank YouSection a Section BSection C Section F Section DSection E P-622Installation Amp Rating Duty CycleSafety Precaution LocationMounting Boom Mount Bench MountSwivel Mount SuspendedElectric Shock can Kill Weld Cable SizesCoaxial Weld Cables Weld Cable Connection6INSTALLATIONA-6 Analog Control CableControl Cable Connections Miller Power Source Lincoln Wire Feeder Analog Miller Control Cable Adapter K2335-1Pin Function Remote Sense Lead Specifications Wire Drive SystemsWelding GUN/WIRE Feeder Trigger Connector High Frequency ProtectionWelding GUNS, Torches and ACCES- Sories Figure A.3Procedure for Changing Drive and Idle Roll Sets Wire Drive ConfigurationPressure ARM Adjustment Gun Receiver For use With BushingSet the pressure arm as follows See Figure A.6 Loading 16 to 44 lb .3 20kg Spools See figure A.8 Wire Reel LoadingSpindle Placement Loading 30 lb .6 kg Readi-Reels See Figure A.9Weld Wire Routing Figure A.9Shielding GAS Connection Installing Electrode Conduit Kits Figure A.10a For Codes 11209, 11210, 11211 and aboveAluminum Wire Preparations Figure A.12a For Codes 11209, 11210, 11211 and aboveBase Model Bench Model Standard Duty Bench Model Heavy Duty Typical System Configurations 15, Magnum15’, Magnum Pro Safety Precautions OperationRecommended Processes Common Welding AbbreviationsProduct Description Required EquipmentFront Panel Controls and Connections Figure B.1 DescriptionStep Trigger Interlock Switch Burnback and Postflow Timer KITCold FEED/GAS Purge Switch Remote Voltage Control KITGUN Receiver Bushing K1500-2 Wire Feed Speed KnobTrigger Connector 5-PIN Amphenol Trigger InterlockAccessories Optional KitsOptional Kits Accessories Key Routine Maintenance MaintenanceMaintenance Periodic MaintenanceSee Figure D.2 For Codes below 11289 use 9 thruFor Codes above 11290 use Troubleshooting HOW to USE Troubleshooting GuideOutput Problems Installed Wiring Diagram LF-72 Feeder 11075, 11076LF-72 Feeder for Codes 11209, 11210, 11211 L12146-1Diagrams Diagrams Dimension Prints Bench Model Bench Model Standard DutyBench Model Heavy Duty Precaucion Warnung
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