Lincoln Electric LN-8 SVM132-A Manuel d'utilisateur

LN-8 SEMIAUTOMATIC WIRE FEEDERSERVICE MANUALSVM132-AMay, 2002Safety Depends on YouLincoln arc welding and cuttingequipment is designed and builtwith

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Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOCLN-8SAFETYFOR ENGINEpowered equipment.1.a. Turn the engine off befo

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Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOCOPERATIONLN-8SECTION B-1SECTION B-1TABLE OF CONTENTS -OPERATION SEC

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B-3OPERATIONB-3CURRENT CONTROL. Adjusts welding current bycontrolling power source output.VOLTAGE CONTROL. Adjusts arc voltage by control-ling wire fe

B-4OPERATIONB-4CIRCUIT PROTECTIONFIELD CIRCUIT FUSE. This 1/2 amp slow blow fuse,located on the Relay PC board, protects the field cir-cuit. It will b

B-5OPERATIONB-5WIRE FEED ROLLS AND GUIDETUBESThe drive rolls and guide tube kits are ordered sepa-rately. Refer to Figure B.3 and install these parts

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOCLN-8SAFETYiiiiARC RAYS can burn.4.a. Use a shield with the proper f

B-6OPERATIONB-67. Install the large ingoing guide into the rear brassblock and tighten the locking screw.8. Install the outgoing guide tube with its p

B-7OPERATIONB-7FIGURE B.4 – CV-CC SWITCHWELDING WITH A CONSTANTVOLTAGE POWER SOURCE1. Current and voltage adjustmentsAmps Control — All Power SourcesS

B-8OPERATIONB-8WIRE REEL LOADING – 50 AND 60 lb COILS (K303 WIRE REELSTAND)MOUNTING A 50 OR 60 lb COIL1. To remove the wire reel from its shaft, grasp

B-9OPERATIONB-9WIRE REEL LOADING (K1524-1 UNIVERSAL WIRE REEL STAND)TO MOUNT A 30 lb (14 kg) READI-REEL PACKAGE (USING THE MOLDED PLASTIC K363-P READI

B-10OPERATIONB-10TO MOUNT 10 TO 44 lb (4.5 to 20 kg) SPOOLS (12 in./300 mm DIAMETER) OR 14 lb (6 kg)INNERSHIELD COILS:The spindle should be located in

B-11OPERATIONB-11FEEDING ELECTRODE TO THE LN-8N ORLN-8S1. Turn the reel until the free end of the electrode isaccessible.2. While tightly holding the

B-12OPERATIONB-12SLOW ACCELERATION STARTING(CODE 7926 AND ABOVE)The LN-8 has the capability of optimum starting for dif-ferent processes. This is acco

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOCSECTION C-1ACCESSORIESSECTION C-1LN-8TABLE OF CONTENTS -ACCESSORIES

Product Number NameK163 UNDERCARRIAGEK178 MOUNTING PLATFORMK261 METER KITK202 BURNBACK KITK58 MAGNETIC SEPARATORK119 GRAVITY FEED FLUX CONEK310 FLUX S

C-3ACCESSORIESC-3K163 UNDERCARRIAGE(REQUIRES K303, K377, OR K378)The undercarriage includes casters, wheels, a handle,and related hardware. Casters ar

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOCLN-8SAFETYFOR ELECTRICALLYpowered equipment.8.a. Turn off input pow

C-4ACCESSORIESC-4K240 CONTACTOR KITOutput contactor with pilot relay to make the electrode‘cold’ when not welding. Must be ordered when usingthe LN-8

C-5ACCESSORIESC-5WELDING GUNSINNERSHIELD GUNSThe K126 gun and cable assembly is recommendedfor most Innershield electrodes at up to 350 amps. The K115

C-6NOTES LN-8C-6Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOCReturn to Master TOC Return to Master TOC Ret

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOCSECTION D-1MAINTENANCESECTION D-1LN-8TABLE OF CONTENTS -MAINTENANCE

D-2MAINTENANCED-2ROUTINE MAINTENANCEDRIVE ROLLS AND GUIDE TUBESAfter feeding every coil of wire, inspect the drive rollsection. Clean the assembly as

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOCSECTION E-1THEORY OF OPERATIONSECTION E-1LN-8TABLE OF CONTENTS -THE

E-2THEORY OF OPERATIONE-2GENERAL DESCRIPTIONThe LN-8 is a semiautomatic wire feederdesigned for Innershield (FCAW) andgas metal arc processes with the

E-3THEORY OF OPERATIONE-3GUN TRIGGER AND 1CRRELAY CONTACT CONTROL CIRCUITSWhen the gun trigger switch is activat-ed (closed) the 1CR relay is energize

E-4THEORY OF OPERATIONE-4VARIABLE VOLTAGEBOARD, METER SHUNT,WIRE SPEED ANDREMOTE OUTPUT CONTROLSThe optional variable voltage boardenables the LN-8 to

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Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOCLN-8ivSAFETYivPRÉCAUTIONS DE SÛRETÉPour votre propre protection lir

E-6NOTES LN-8E-6Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOCReturn to Master TOC Return to Master TOC Ret

Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOCLN-8SECTION FTROUBLESHOOTING AND REPAIRSECTION FTABLE OF CONTENTS

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LN-8Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOCReturn to Master TOC Return to Master TOC Return to Master

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LN-8MASTER TABLE OF CONTENTS FOR ALL SECTIONSPageSafety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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F-13TROUBLESHOOTING AND REPAIRF-13TEST PROCEDURE1. Remove input power to the LN-8.2. Using the 5/16 in. nutdriver,remove the screws holding the leftsi

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INTERNAL VOLTAGE TEST (continued)TABLE F.1 – VOLTAGE TEST POINTSReturn to Section TOC Return to Section TOC Return to Section TOC Return to Section TO

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Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOCSECTION A-1INSTALLATION LN-8SECTION A-1TABLE OF CONTENTS -INSTALL

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F-21TROUBLESHOOTING AND REPAIRF-21TEST PROCEDURE1. Remove input power to LN-8.2. Remove the electrode wire or dis-engage drive rolls.3. Using the 5/16

F-22TROUBLESHOOTING AND REPAIRF-226. Locate leads #626 and #627 at therelay board.7. If a variable voltage board isinstalled in the LN-8, make cer-tai

F-23TROUBLESHOOTING AND REPAIRF-23To further check the drive motor:12. Remove input power (115VAC)from the LN-8.13. Locate and remove leads #539and #5

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F-25TROUBLESHOOTING AND REPAIRF-25REPAIR PROCEDURE1. Remove input power to the LN-82. Using the 5/16 in. nutdriver,remove the screws from the leftside

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F-27TROUBLESHOOTING AND REPAIRF-27REPAIR PROCEDURE1. Using the 5/16 in. nutdriver,remove the screws from the leftside cover assembly.2. Tag and remove

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F-39TROUBLESHOOTING AND REPAIRF-3914. Install the gearbox assembly ontothe insulation sheet and mountingplate using four hex head screws,lockwashers a

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F-40TROUBLESHOOTING AND REPAIRF-40If a failed test indicates that anymechanical part that could affect themachine’s electrical characteristicsmust be

G-1ELECTRICAL DIAGRAMSG-1Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOCTABLE OF CONTENTS -ELECTRICAL DIAGRAMS SEC

G-2ELECTRICAL DIAGRAMSLN-8Wiring Diagram2502450453132A*1623452502450453132A528525WIREFEEDMOTOR539U541BR626627 WBURNBACKP.C. BOARDJUMPER CONNECTOR IS R

G-3ELECTRICAL DIAGRAMSLN-8CONNECTION SCHEMATIC 14669 Ch’ge. Sht. No. 3-31-83N 11-14-86G 2-13-87G

G-4ELECTRICAL DIAGRAMSLN-8OPERATING SCHEMATIC54236132A53145045022241CR504N.A.3232A5 AMP CIRCUITBREAKERTP201C204777675R20T1526525AC205525R205523524S1R2

G-5ELECTRICAL DIAGRAMSLN-8CONTROL BOARD (L5767) SCHEMATICG-5Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOCRet

G-6ELECTRICAL DIAGRAMSLN-8VARIABLE VOLTAGE BOARD (L5039) SCHEMATIC12-3-92EG-6Return to Section TOC Return to Section TOC Return to Section TOC Return

G-7ELECTRICAL DIAGRAMSLN-8CONTROL BOARD (L5767) LAYOUTLN-8 CONTROLL5767-1D6D71 2345678NOBAL CALFSITEM REQ’D. PART No.IDENTIFICATIONC1C2C3C4C5C6,C10,C1

G-8ELECTRICAL DIAGRAMSLN-8VARIABLE VOLTAGE BOARD (L5039) LAYOUTIDENTIFICATIONPART NO.REQ’DITEMINDUCTANCE = HENRYCAPACITORS = MFD VOLTSL5039-1LN-8 VARI

SVM ERROR REPORTING FORMWe need to know if there are errors in our manuals. We also value any suggestions as toadditional tests or procedures that wo