Lincoln Electric SVM189-B service manual Controls and Settings, See Figure B.1, See Figure B.2

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B-3	OPERATION	B-3

CONTROLS AND SETTINGS

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See Figure B.1

1.POWER SWITCH – Turns power on and off to the machine.

2.ARC VOLTAGE CONTROL – This knob sets the output voltage of the machine. Along with wire feed speed (WFS) this control sets a weld procedure. Refer to the procedure decal on the inside wire drive compartment door to set a correct welding proce-

dure based on type of material and thickness being

3

welded.
NOTE: The Arc Voltage Control will be either a contin-
uous control or a multi-position switch depend-
ing on the model.	1
	1

3.WIRE FEED SPEED CONTROL (WFS) – The knob sets the speed that the machine feeds wire. Along with arc voltage control this control sets a weld pro- cedure. Refer to the procedure decal on the inside wire drive compartment door to set a correct welding procedure based on type of material and thickness being welded.

FIGURE B.1

2

See Figure B.2

FIGURE B.2

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4.GUN TRIGGER – Depress the trigger to activates the wire drive to feed wire and energizes the output of the machine. Depress the trigger to weld and release the trigger to stop welding.

5.WELDING GUN – Delivers wire and welding current to the weld.

a.Gun Liner – wire travels through the liner from the wire drive. The gun liner will feed .025” to .035” (0.6mm to 0.9mm) wire. The 180A machine can weld with .045”(1.1mm) wire if an optional

.045”(1.1mm) liner is installed in the gun.

b.Contact Tip – provides electrical contact to the wire.

c.Nozzle – When flux-cored welding the black noz- zle protects the mounting threads on the gun. When MIG welding the brass nozzle funnels the shielding gas to the weld.

6.WORK CLAMP & CABLE – Clamps to the work piece being welded and completes the electrical welding circuit.

7.GUN TRIGGER CONNECTOR RECEPTACLE – Plug the 4 pin gun trigger connector into this recep- tacle.

5c

5b

5a

.035"(0.9mm) NR-211-MP

5

WIRE SPOOL

4

6 7

COMPACT WIRE WELDERS

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Contents SVM189-B Safety Depends on YouCalifornia Proposition 65 Warnings SafetyElectric Shock can kill ARC Rays can burn For Electrically Welding CuttingIii Sûreté Pour Soudage a L’Arc Précautions DE SûretéMaster Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications InstallationSelect Suitable Location Safety PrecautionsStacking Tilting Identify and Locate Components Table of Contents Operation Section Product Description Product Capabilities OperationCommon Welding Abbreviations Wear eye, ear and body protec- tionSee Figure B.1 Controls and SettingsSee Figure B.2 Drive Roll Tension Thumbscrew Turning See Figure B.3Number Part Number Wire Diameter Drive Roll Drive Roll Part Inner Wire GuideItems Needed for Flux Cored Welding Setting UP and Making a FLUX-CORED WeldConnect Leads and Cables on Load Wire SpoolMachine Figure B.9 025 MIG Conversion Kit K2526-1Shielding GAS Install Shielding GASConnect Leads and Cables on the Machine 11OPERATIONDo not Remove or Conceal Warning Labels 12OPERATIONFigure B.20 Compact Wire Welders Table of Contents Accessories Section K2525-1 Spot Timer Kit AccessoriesK2532-1 Magnum 100SG Spool Gun K2377-1 Small Canvas CoverK520-Utility Cart K2275-1 Welding Cart Unpacking the Spool GUN Technical Specifications Magnum 100SG Spool GUN K2532-1Locating Spool GUN Components Features Safety PrecautionsFigure C.3 Assembly of Items Inside the Magnum Spool GUNRecommended Welding Machines Safety Precautions Welding MachinesSpool GUN Disconnect input power from the machine Spool GUN / Wire Drive Selector Switch InstallationOpen the Machine 11.B. Connect P5 6-pin to harness J8 6-pin Electrical Connections11.C. Connect harness P8 6-pin to board J5 6- pin 544A 543A If Machine does have Optional Spot Timer .A. thru 12.DRE-ASSEMBLE Machine AS Follows Mounting the SwitchDisconnect input power to the machine ACCESSORIESC-13Routine Welding Machine Preparation Preparing the Spool GUNFigure C.5 Loading Aluminum WireFigure C.11 Figure C.17 Connecting the GUN to the Welding MachineTable of Contents Maintenance Section Maintenance Safety Precautions MaintenanceRoutine Maintenance Overload Protection GUN and Cable MaintenanceFor Magnum 100L GUN GUN Handle Parts Changing LinerLiner trim length Major Component Locations Maintenance 1TABLE of CONTENTS-THEORY of Operation Section E-1 General Description Theory of OperationInput Line VOLTAGE, FAN Motor & Main Transformer Figure E.3 Input Power CircuitsFigure E.4 Output Circuits Output CONTROL, Rectification & Voltage FeedbackFigure E.5 TRIGGER, GAS Solenoid & Wire Drive TRIGGER, GAS Solenoid and Wire DriveFigure E.6 SCR Operation SCR OperationElectronic Wire Drive Motor Protection Compact Wire Welders Table of Contents Troubleshooting & Repair HOW to USE Troubleshooting Guide Troubleshooting & RepairPC Board Troubleshooting Procedures Wiring Diagram OUTPUT/FEEDING Problems Feeding Problems Welding Problems Maintenance Section Issues Maintenance Section Cone or gas diffuser Test Description Case Cover Removal and Replacement ProcedureMaterials Needed Figure F.1 Case Removal ProcedureGAS Solenoid Test GasSolenoid Leads Wire Drive Motor Test MOT-MOT+ Test ProcedureMain Transformer Test Secondary Test Procedure Secondary Lead Compact Wire Welders FAN Motor Test Figure F.5. Control Board Lead Locations Typical Output Voltage Waveform Machine Loaded Scope SettingsVolts 10Volts 20ms Abnormal Open Circuit Voltage Waveform Control Board Removal and Replacement Procedure See Figure F.7 Nameplate Control Knob Compact Wire Welders Power Module Removal and Replacement Procedure Viewed from Rear of Machine Center Panel PolarityPanel CenterPanelScrews OutputStuds Compact Wire Welders Misc. Hand Tools Dow Corning Fine Steel Wool See Figure F.12 Dow Corning Figure F.12 DOW Corning Application Areas Transformer Compact Wire Welders Wire Drive Motor Removal and Replacement Procedure Lincolnelectric Phillips Mounting Screws Compact Wire Welders FAN Motor Assembly Removal and Replacement Procedure Viewed from Rear of Machine Center Panel CenterPanelScrews Locking Tabs Fan Wire Speed Range Troubleshooting & Repair Retest After Repair 125 AMP UnitsRetest After Repair 140 AMP Units Open Circuit VoltageTroubleshooting & Repair Retest After Repair 180 AMP Units Table of Contents Diagram Section COmpacT WirE WElDErS Wiring DiagramSpool GUN Interface Wiring Diagram Wiring Diagram Thermostat TMP FAN TS1 M20410-3 a COmpacT WirE WElDErSSchEmaTic cOmplETE machiNE m21240 C12 R1Feed R24