Lincoln Electric SP-100 service manual Volts, Typical Output Voltage Waveform Machine Loaded

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TROUBLESHOOTING & REPAIR

F-10

TYPICAL OUTPUT VOLTAGE WAVEFORM – MACHINE LOADED

C1

0 volts

10 volts

20 ms

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This is the typical output voltage waveform generated from a properly operating machine. Note that each vertical division represents 10 volts and that each hor- izontal division represents 20 milliseconds in time. The machine was loaded with a resistance grid bank. The ammeter read 90 amps and the voltmeter read 19 vdc.

Note: Scope probes connected at machine output ter- minals. Positive probe to (+) terminal, negative probe to (–) terminal.

SCOPE SETTINGS

Volts/Div	10/Div
Horizontal Sweep	20 ms/Div
Coupling	DC
Trigger	Internal

SP-100

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Contents SP-100 Fumes and Gases can be dangerous SafetyElectric Shock can kill ARC Rays can burnWelding Sparks can cause fire or explosion Cylinder may explode if damagedMay be dangerous Electric and Magnetic FieldsSûreté Pour Soudage a L’Arc Précautions DE SûretéMaster Table of Contents for ALL Sections Installation Section Table of ContentsTechnical Specifications SP-100 InstallationIdentify and Locate Components Safety PrecautionsRead entire installation section before starting InstallationTilting Work Clamp InstallationSelect Suitable Location Output ConnectionsGAS Connection GUN InstallationConnecting GUN Cable to the SP-100 Input PowerInput Connections Gas Solenoid Inlet FittingRequirements for Rated Output Code Requirements for Input ConnectionsRequirements for Maximum Output Requirements for CSA Rated OutputSP-100 Table of Contents Wear eye, ear and body protec- tion OperationOff Operational Features and ControlsDesign Features Advantages General DescriptionSequence of Operation Wire LoadingWelding Operations Process GuidelinesRefer to Figure B-4 Friction Brake AdjustmentsMaking a Weld Shielding GASOverload Protection SP-100 Accessories Section Innershield Welding Kits 1ACCESSORIESReplacement Parts Lincoln GAS Regulator Kits K467 Input Line CordMaintenance Section Routine and Periodic Maintenance MaintenanceItems Requiring no Maintenance Liner trim length for the Magnum 100L gun red trigger Changing the Contact TIPChanging Drive Roll Figure D.3 SP-100 SUB Assemblies SP-100 Theory of Operation Input Line VOLTAGE, FAN Motor and Main Transformer Figure E.1 Input Power CircuitsFigure E.2 Output Circuits Output CONTROL, RECTIFICA- Tion and Voltage Feedback3THEORY of Operation TRIGGER, GAS Solenoid and Wire DriveFigure E.4 SCR Operation SCR OperationThermostat protects the machine from Oscilloscope Waveforms Troubleshooting SectionHOW to USE Troubleshooting Guide 1TROUBLESHOOTING & RepairPC Board Troubleshooting Procedures Troubleshooting & RepairFacility Troubleshooting GuideAuthorized Field Service Below Code 9794 only Code 9794 and Above Problems SymptomsPossible Areas of Misadjustments Recommended Course of ActionFeeding Problems Troubleshooting Guide Codes 9794 and above 6J1 10J2 1J1 1J2 Codes below SP-100 PC Board Connector LocationsNormal Open Circuit Voltage Waveform 9TROUBLESHOOTING & RepairScope Settings Volts Volts/DivTypical Output Voltage Waveform Machine Loaded VoltsAbnormal Open Circuit Voltage Waveform Tools Required Procedure DescriptionProcedure FAN Blade and Motor Removal1B. for Codes below Wire Drive Assembly RemovalMotor Removal Procedure 1A. for Codes AboveInput Amps AT Rated Output Input Amps AC @ Output DC Wire Speed RangeRetest After Repair Main Transformer Secondary Voltages Test PointsSP-100 Electrical Diagrams Section Diagram Wiring DiagramsWiring 4 5 1 M SP-100 Wiring Diagram Codes BelowElectrical Diagrams Control P.C. Board G1842 Electrical DiagramsControl P.C. Board G2314 SCR1, SCR2 SCR 81 Heatsink Asbly Control P.C. Board G2314Error Machine Schematic Codes 9794 and Above86R R63R64 1 5 K Machine Schematic Codes BelowSVM Error Reporting Form