Lincoln Electric IM620-B manual Loading Wire Drive, Idle Roll Pressure Setting

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B-5

OPERATION

B-5

 

FIGURE B.2 READI-REEL INSTALLATION

2" O.D. SPINDLE

BRAKE HOLDING PIN (MUST ENGAGE HOLE IN ADAPTER RIB)

GROOVES

LOADING WIRE DRIVE

a. Turn the reel or spool until the free end of the electrode is accessible.

b. While tightly holding the electrode, cut off the bent end and straighten the first six inches. Cut off the first inch. (If the electrode is not properly straightened, it may not feed or may not go into the outgoing guide tube causing a “bird nest”.)

c. Insert the free end through the incoming guide tube to the drive roll.

d. Turn on the welding power source.

WARNING

Unless an optional output control or internal contactor is used with the LN-25, the electrode circuit is electrically “hot” when the power source is on.

e. Press the gun trigger and push the electrode until it just enters the drive roll.

WARNING

When inching with gun trigger, the electrode and drive mechanism are always “hot” to work and ground. Use the “cold” inch switch on models with internal contactor.

MOLDED ADAPTER

RETAINING SPRING

READI-REEL

INSIDE CAGE WIRES

THREAD LOCKING COLLAR

f.Inch the electrode through the gun.

g.Adjust the brake tension with the thumbscrew on the spindle hub until the reel turns freely, but with little or no overrun when wire feeding is stopped. Do not over tighten.

CAUTION

Keep gun in LN-25 gun holder when not feeding wire to prevent accidental arcing.

IDLE ROLL PRESSURE SETTING

The idle roll pressure is set at the factory backed out two turns from full pressure. This is an approximate setting. For small wire sizes and aluminum wire, the optimum idle roll pressure varies with type of wire, surface condition, lubrication and hardness. The op- timum idle roll setting can be determined as follows:

1.Press end of gun against a solid object that is electrically isolated from the welder output. Press the gun trigger for several seconds.

2.If the wire “bird nests,” jams or breaks at the drive roll, the idle roll pressure is too great. Back the pressure setting out 12 turn, run new wire through gun, and repeat above steps.

LN-25

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Contents LN-25 Portable CV/CC Semiautomatic Wire Feeder Safety California Proposition 65 WarningsElectric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Sûreté Pour Soudage a L’ArcPlease Examine Carton and Equipment For Damage Immediately Table of Contents Installation Safety Precautions Power Source ConnectionINVERTEC, CV300 and Other Newer Lincoln Power Sources GUN Cable Connection to FeederCV Adapter For GMA GUN and CablesWire Feed Drive Roll and Guide Tube Kits Weld Cable ConnectionElectrode Cable Connection Work Cable ConnectionOperation General DescriptionRecommended Processes and Equipment Welding Capability Electrode Polarity Switch Wire Feed Mode Switch Wire Speed Dial and Range Switch LN-25 Instruments and ControlsGAS Post PRE-FLOW Timers Optional Work Clip LeadAWG Remote ARC Voltage Control OptionalSequence of Operation Loading ElectrodeMounting 22 to 30 LB READI-REELCOILS Mounting 10 to 30 LB SpoolsLoading Wire Drive Idle Roll Pressure SettingSetting Constant Wire Feed Speed CV Mode Presetting Wire Feed SpeedSetting ARC Sensing Wire Feed Speed VV CC Mode Making a Weld In/MinProcedure AT END of Coil WeldingOvervoltage Shutdown Automatic Protection ShutdownMotor Overload Shutdown LN-25 Option Chart AccessoriesTable C.1 K434-1 GAS Flow Timer KIT Accessories Optional AccessoriesK430-2 GAS Solenoid KIT K461 Pulse Power Control Cable Remote Output Control Options and Control Cable AssembliesK443-2 LN-25 Contactor KIT K443-3 LN-25 Contactor KITK433 Power Source Remote BOX K432 Remote Control Cable AssemblyK439 Remote Extension Cable Assembly K625, K626, K627 Remote Control Cable AssemblyPower Source CableType Rating Electrode Connection K444, K444-1 or K444-2 Remote Voltage Control KITDrive Roll & Guide Tube Wire Sizes Used Kit No Dia. HoleMaintenance Routine MaintenanceAdjusting Speed Sensor Module Circuit Protection and Automatic ShutdownCalibration of LN-25 Wire Speed Dial Troubleshooting HOW to USE Troubleshooting GuideProblems Possible Symptoms Cause Recommended Course of ActionFeeding Problems Weld Problems Wiring Diagram Wiring Diagram Dimensions LN-25 Physical DimensionsLN-25 LN-25 Ground Fuera del área de trabajo CuerpoInflammable Votre corps PerschutzKeep your head out of fumes Guards offUse ventilation or exhaust to Desconectar el cable de ali No operar con panel abierto o