Lincoln Electric SVM125-A service manual Welding Problems

Page 62

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F-12

 

 

F-12

 

TROUBLESHOOTING & REPAIR

 

 

TROUBLESHOOTING GUIDE

 

 

Observe Safety Guidelines

 

 

detailed in the beginning of this manual.

 

 

 

 

 

PROBLEMS

POSSIBLE AREAS OF

RECOMMENDED

 

(SYMPTOMS)

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

 

 

 

 

 

WELDING PROBLEMS

 

 

 

 

The welding arc is loud and spat-

1. The current setting may be too

1.

Check the engine speed. High

 

ters excessively.

high for the electrode and

 

idle speed should be 1800

 

 

process.

 

RPM.

 

 

2. The polarity may be wrong for

2.

Check the DC generator brush-

 

 

the electrode and process.

 

es for good commutation and

 

 

 

 

alignment. Contact the Lincoln

 

 

 

 

Electric Service Dept. at 1-216-

 

 

 

 

383-2531 or 1-800-833-9353

 

 

 

 

(WELD).

The welding arc frequently “pops 1.

The Fine Current Control 1.

Check the engine speed. High

out.”

Rheostat may be set too low for

idle speed should be 1800

 

the process and electrode.

RPM.

 

 

2.

Check the welding cables for 2.

The Current Range selector

 

loose or faulty connections.

switch may be faulty. Check for

 

 

proper operation.

 

 

3.

Check

the

DC generator

 

 

brushes for good commutation

 

 

and alignment.

Contact the

 

 

Lincoln Electric Service Dept. at

 

 

1-216-383-2531 or 1-800-833-

 

 

9353 (WELD).

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 216- 383-2531 or 1-800-833-9353.

CLASSIC II

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Contents Classic II TM Safety California Proposition 65 WarningsElectric Shock can kill Welding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications ClassicStoring Safety PrecautionsLocation and Ventilation PRE-OPERATION Engine Service Muffler Undercarriages Spark ArresterElectrical Output Connections Welding Cable ConnectionsCircuit Breakers Auxiliary Power RECEPTACLES, PLUGS, and HAND-HELD EquipmentMachine Grounding Classic Table of Contents Operation Section Operating Instructions Safety InstructionsOperation General DescriptionRecommended Applications Operational Features and ControlsDesign Features WelderWelding Capability LimitationsControls and Settings WELDER/GENERATOR ControlsControl of Welding Current Figure B.2 Current ControlsDiesel Engine Controls Return toStarting the Engine Engine OperationBefore Starting the Engine Check and fill the engine fuel tankBREAK-IN Period Stopping the EngineCold Weather Starting Idler Operation Welding OperationGeneral Information After you finish welding Figure B.4 Welding Circuit Connections for Stick WeldingTable B.1 Range Settings for Wire SIZE/SPEED Auxiliary Power 13B-13Table B.2 Generator Power Applications Suggested Power Applications Running Watts Start-up WattsTable of Contents Accessories OPTIONS/ACCESSORIES Accessory Kit K703 Includes the followingTIG Welding Semiautomatic WeldingAdapter see Figure C.1 Connection of Lincoln Electric Wire FeedersConnection of the LN-7 to Classic II Using K867 Universal Adapter Work Electrode Cable To LN-7 Figure C.3 Classic II/LN-25 Connection Diagram With K444-2 Remote Control K487-25 Table of Contents Maintenance Routine and Periodic Maintenance Engine MaintenanceFigure D.1 OIL Drain and Refill Figure D.2 Tightening the Cooling Blower Belt First 50 Hours Daily or BeforeStarting Engine Every 50 HoursBattery Maintenance Checking Specific GravityWELDER/GENERATOR Maintenance Idler MaintenanceFigure D.3 Major Component Locations Table of Contents Theory of Operation Section Circuits Theory of OperationALTERNATOR, and Protection Interpole and Series Coils Excitation FlashingAuxiliary and Field Feedback Coils Engine Idler Circuit Fine Current AdjustmentCurrent Range Selector DC Generator Machines Classic Table of Contents Troubleshooting & Repair Section Troubleshooting & Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures PC Board can be damaged by static electricityDetailed in the beginning of this manual Troubleshooting GuideObserve Safety Guidelines Shunt Field Winding Test Perform the Shunt Field Wind Troubleshooting & Repair Function Problems Troubleshooting & Repair Troubleshooting & Repair Troubleshooting & Repair Welding Problems Materials Needed Alternator Rotor TestTest Description Test Procedure Alternator Rotor TestFigure F.2 Measuring Rotor Resistance Classic Figure F.3 Measuring Rotor Resistance to Ground Classic Shunt Field Winding Test Shunt Field Winding Test PIN TAB Idler Solenoid Test Idler Solenoid Test Engine Throttle Adjustment Test Engine Throttle Adjustment Test Frequency Counter Method Oscilloscope MethodAdjusting Screw Locking NUT Flashing the Fields DescriptionProcedure Do not remove brush holderHigh Idle no Load Fine Current Control Rheostat AT Maximum Scope SettingsNormal Open Circuit Voltage Waveform 115VAC Supply Normal Open Circuit DC Weld Voltage Waveform Machine Loaded Selector Switch AT Maximum Position Typical DC Weld Output Voltage WaveformAlternator Rotor Removal Replacement Replacement Alternator Rotor RemovalFuel Tank Return Line Mounting Hardware Cable Retainer Bowl Negative Output Terminal Copper Strap on Rear Side Figure F.14 Alternator Cover Removal Figure F.15 Rotor Removal Replacement Alternator Stator Removal and Replacement Procedure Alternator Stator RemovalVAC Receptacle Circuit Breaker Field Bridge Rectifier Genernator Brush HOLDER/COIL Cables Drill Spot STATOR/ENDBRACKET Mounting Bolt Generator Frame Removal and Replacement Generator Frame Removal Figure F.21 Generator Lead and Cable ConnectionsRope Sling ENGINE/GENERATOR Mounting Holes Generator Armature Removal and Replacement Generator Armature Removal Blower Paddle PADDLE/ARMATURE Mounting BoltsEngine Output AC Auxiliary Power Receptacle OutputRetest After Repair Welder DC OutputElectrical Diagrams Section Classic Electrical Diagrams Wiring Diagram CodeRemote Control Optional Remote Control Optional Wire Feed Module Optional Wire Feed Thermostat * Machine Must not be Running J3 Sensor Idler PC Board M13708 Schematic Idler PC Board M13708 Components Idler PC Board l9902 Schematic Idler PC Board l9902 Components

SVM125-A specifications

The Lincoln Electric SVM125-A is a versatile and highly efficient welding machine that has gained significant recognition in the welding industry. Designed for both professionals and enthusiasts, this machine combines advanced technology with user-friendly features to deliver outstanding performance in a range of welding applications.

One of the standout features of the SVM125-A is its Inverter Technology. This cutting-edge technology allows for lightweight and compact design, making the machine highly portable. The inverter technology also provides a steady arc, which is crucial for achieving clean, high-quality welds. With a duty cycle of 125 amps at a 60% duty cycle, this welding machine can handle a variety of materials and thicknesses, from thin sheet metal to heavier structural components.

The SVM125-A supports multiple welding processes, including MIG, stick, and TIG welding. This versatility makes it an ideal choice for diverse welding tasks, whether you're working in a fabrication shop, doing repair work, or engaged in hobbyist projects. The machine features easy switch functionality, allowing users to quickly shift between welding processes without complicated setup.

Another notable characteristic is the machine's user-friendly interface. The intuitive control panel includes clear indicators and knobs that allow for easy adjustments of voltage and wire feed speed. This design is especially helpful for novice welders, providing them with the confidence to make adjustments as needed and ensuring optimal weld quality.

Safety is also a priority with the SVM125-A. The machine is equipped with thermal overload protection, which automatically shuts it down in case of overheating, preventing damage to the unit and ensuring operator safety. Additionally, the machine features a robust construction that emphasizes durability, making it suitable for demanding work environments.

Portability is enhanced through its lightweight design, and the built-in carrying handle makes it easy to transport from one job site to another. The SVM125-A is also compatible with a variety of welding accessories, further increasing its adaptability and functionality.

In conclusion, the Lincoln Electric SVM125-A stands out as a well-rounded welding machine that integrates advanced technology with user-friendly features. Its versatility in welding processes, robust design, and emphasis on safety and usability make it a valuable tool for welders at all skill levels. Whether for professional use or personal projects, the SVM125-A is a reliable choice that delivers exceptional performance and quality.