Lincoln Electric SVM132-A Input Cable Connections, LN-8N and LN-8S, LN-8NE and LN-8SE

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A-15	INSTALLATION	A-15
	INSTALLATION

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INPUT CABLE CONNECTIONS

For connecting an LN-8 to a specific Lincoln Electric power source, use the appropriate steps in one of these paragraphs and refer to the connection dia- grams listed on Table A.2 for the applicable power source. Table A.2 lists each figure number with its corresponding power source.

LN-8N AND LN-8S

The input cable consists of an electrode cable and a multi-conductor control cable. The control cable has a polarized plug on the wire feeder end. To connect the cables, refer to Figure A.11 and perform these steps:

1.Connect the polarized plug of the control cable to the mating connector on the back of the wire feeder.

FIGURE A.11 – INPUT CONTROL CABLE AND ELECTRODE CABLE CONNECTIONS

CABLE

CLAMP

CONDUCTOR

ELECTRODE

CABLE

WIRE

REEL

BASECONTROL

CABLE

2.Remove the screws holding the cable clamp located near the rear of the wire reel base. Put the control cable and electrode cable under the clamp and install the screws. On cables with more than one electrode cable, leave the junction between the two or more cables and the single 4/0 stub behind the clamp so only the single electrode lead is under the clamp.

3.Pass the single electrode cable through the holes provided in the back corner of the control section and fasten it to the tab on the conductor above the rear brass block of the wire feeder.

LN-8NE AND LN-8SE

The extension unit consists of a wire reel mount with a hand crank and either a 22-1/2 or 45 ft (6.9 or

13.7m) extension cable assembly. The cable is rated at 450 amps, 50% duty cycle. For higher currents install a parallel length of 1/0 cable per step 10. The extension cable can be used for 0.068 through 0.120 in. (1.7 through 3.0 mm) flux-cored electrode and 5/64 through 3/32 in. (2.0 through 2.4 mm) solid electrode. The 22-1/2 ft. (6.9 m) cables can also be used for 1/16 in. (1.6 mm) solid electrodes. To con- nect the cables, perform these steps:

1.When shipped, the hand crank on the wire reel mount is equipped to feed 1/16 through 0.120 in. (1.6 through 3.0 mm) electrode.

LN-8

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Contents LN-8 Semiautomatic Wire Feeder LN-8 SafetyElectric Shock can kill Iii Welding Sparks can cause fire or explosionSûreté Pour Soudage a L’Arc Précautions DE SûretéMaster Table of Contents for ALL Sections Installation LN-8 with K303 Electrode DiameterLN-8 with K377 LN-8 with K378Power Source Connections Table A.1 Work Lead SpecificationsLN-8N and LN-8NE LN-8S and LN-8SE and Converted LN-8N and LN-8NE Power Source Selection Switch Variable Voltage PC BoardTable A.2 LN-8 Power Source Connection Diagrams Power Source Connection DiagramsSection TOC Installation TOC Figure A.5 Connection of LN-8 to R3S-250 and R3S-325 9A-9Figure A.6 Connection of LN-8 to DC-600 10A-10Power Source To LN-8 Input Cable Plug Control Cable LN-8 for Same Polarity Operation Shock Can Kill LN-8 for Opposite Polarity Operation14A-14 Figure A.10 for Power Sources Other than Lincoln ElectricInput Cable Connections Cable Clamp Conductor Electrode Wire Reel BasecontrolLN-8N and LN-8S LN-8NE and LN-8SEExtension Tube Connector Connections to Wire FeederLocking ScrewSELF-TAPPING Screw Hinge Handle Figure A.14 Wire Feeder Handle InstallationGUN and Cable Assemblies Handling ProceduresLN-8S and LN-8SE Continuous Flux Feed Submerged ARC GeneralOperation Controls and Their Functions Safety InstructionsConstant Current Controls Gouging SparksCurrent Controls Voltage Constant Voltage ControlsAvoiding Ground Lead Protector GLP Activation Circuit ProtectionFigure B.3 Wire Feed Rolls and Guide Tube Installation Wire Feed Rolls and Guide TubesSetting for CV or CC Power Sources Welding with a Constant Voltage Power SourceSlots Coil Reel Mounting a 50 or 60 lb CoilWire Reel Loading K1524-1 Universal Wire Reel Stand K363-P READI-REEL AdapterAdapter 12 in./300 mm Diameter or 14 lb 6 kg To Mount 10 to 44 lb 4.5 to 20 kg SpoolsInnershield Coils READI-REELS a K438 READI-REEL Adapter Must be UsedFeeding Electrode to the LN-8N or LN-8S Feeding Electrode to the LN-8NE or LN-8SE with ExtensionBrass Blocks Hand Crank ARM Slow Acceleration Starting Code 7926 and Above Flux Tank LoadingAccessories General Table C.1 LN-8 Wire Feeder AccessoriesK163 Undercarriage Requires K303, K377, or K378 K161 Mechanized Travel Power PackK178 Mounting Platform K58 Magnetic SeparatorReel Mounting Accessories Constant Current Conversion Parts Welding Guns Welding GUN AccessoriesLN-8 Table of Contents Maintenance Section MaintenanceRoutine Maintenance Periodic Maintenance Theory of Operation Table of Contents Theory of Operation SectionGeneral Description Power Input CircuitsFigure E.2 GUN Trigger and 1CR Contact Control Circuits GUN Trigger and 1CR Relay Contact Control CircuitsFuse Field SCR Operation 5E-5Applied Later CYCLE, the SCR Output Is Decreased LN-8 Troubleshooting and Repair Return to Return to Section TOC HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Troubleshooting & RepairProblems Symptoms Troubleshooting GuideFunction Problems Transformer Test Perform the 1CR Relay Test Feeding Problems Welding Problems LN-8 Electrical Sequence of Operation Figure F.1 LN-8 Electrical Sequence of Operation Test Description Trigger Transformer TestTrigger Transformer Test Internal Voltage Test Receptacle ConnectorCircuit Applied Breaker Control BoardTable F.1 Voltage Test Points Internal Voltage Test1CR Relay Test 1CR Relay Test Table F.2 Relay Test Terminal Connections 1CR Relay TestDrive Motor Test Drive Motor Test 1CR Figure F.6 GUN Terminal Jumper LocationsTable F.3 Drive Motor Test Points To further check the drive motorPotentiometer Replacement Repair Procedure Circuit Breaker Replacement Retaining NUT Ground Lead Protector Switch Mount Flatwasher Lockwasher NUTGround Lead Protector Push Button Switch Replacement Ground Lead Protector Push Button Trigger Transformer Replacement Insulation Sheet Trigger Transformer NUT Relay PC Board Roundhead ScrewPC Board Replacement Control PC Board Variable Voltage PC Board Relay PC Board Figure F.10 PC Board LocationsRelay Board Removal Control PC Board Replacement Wire Drive Assembly and Component Replacement White BlackGreen Ground Yellow Blue TWO#568 #567 ShuntGearbox Insulation Sheet Mounting Plate MotorTOC Retest After Repair Electrical Diagrams LN-8N, -8NE, -8S, and -8SE Wiring Diagram Source Power to Work Connection Schematic1CR Wire Feed Motor Field Operating SchematicControl Board L5767 Schematic Variable Voltage Board L5039 Schematic Control Control Board L5767 LayoutVariable Voltage Board L5039 Layout SVM Error Reporting Form