Lincoln Electric 11521 service manual Tachometer Feedback Test

Page 46

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F-8

TROUBLESHOOTING AND REPAIR

F-8

 

 

 

 

 

 

Observe Safety Guidelines detailed in the beginning of this manual.

 

 

 

 

 

 

 

 

PROBLEMS

POSSIBLE AREAS OF

RECOMMENDED

 

 

(SYMPTOMS)

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

 

 

 

 

 

WIRE FEEDING PROBLEMS

 

 

Rough wire feeding or the wire will

1. The gun cable may be kinked or

 

 

not feed but the drive rolls are turn-

twisted.

 

 

ing.

 

 

 

 

 

 

2. Check the drive roll tension and

 

 

 

 

the position of the grooves.

 

 

 

 

3. Electrode may be rusted or dirty.

 

 

 

 

4. The contact tip may be damaged

 

 

 

 

or not the correct size.

 

 

 

 

5. Check the wire spindle for ease of

 

 

 

 

rotation.

 

 

 

 

6. Make certain the gun is pushed

 

 

 

 

all the way into the gun mount

 

 

 

 

and properly seated.

 

 

 

 

 

No control of wire feed speed.

1. The wire feed speed control may

1. The wire speed control potentiome-

Other machine functions are nor-

be dirty. Rotate several times and

ter may be faulty. Check or replace.

mal.

 

check if the problem is resolved.

Normal potentiometer resistance is

 

 

 

10K ohms.

 

 

 

 

2. Perform the Wire Drive Motor and

 

 

 

Tachometer Feedback Test.

 

 

 

 

3. The control board may be faulty.

 

 

 

 

There is no wire feed when the gun

1. Check for adequate wire supply.

1. Perform the Wire Drive Motor and

trigger is activated. Normal open

 

Tachometer Feedback Test.

 

circuit weld voltage is present and

2. If the drive rolls are turning, check

 

 

the gas solenoid functions normal-

for a mechanical restriction in the

2. The wire speed control potentiome-

ly.

 

wire feed path.

ter may be faulty. Check or replace.

 

 

 

Normal potentiometer resistance is

 

 

3. The gun liner may be clogged.

10K ohms.

 

 

 

Check or replace.

 

 

 

 

 

3. The control board may be faulty.

 

 

 

4. If the drive rolls are not turning

 

 

 

 

when the gun trigger is activated,

 

 

 

 

contact your local Lincoln Electric

 

 

 

 

Authorized Field Service Facility.

 

 

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 1-888-935-3877.

Power MIG® 215XT

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Contents Power MIG 215XT Safety Power MIG 215XTElectric Shock can kill ARC Rays can burn For Electrically Welding CuttingIii Précautions DE Sûreté Sûreté Pour Soudage a L’ArcSafety Methods of Reducing Emissions Mains Supply Master Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications Power MIG 215XTInput POWER, Grounding and Connection Diagrams Safety PrecautionsUncrating the Power MIG 215XT LocationOutput Polarity Connections Shielding GAS GUN and Cable InstallationAUXILIARY POWER RECEPTACLES Cylinder may explode if damagedPower MIG 215XT Table of Contents Operation Section OPERATIONB-2 Wear eye, ear and body protec- tionOperation Procedure for Changing Drive AND IDLE Roll Sets Wire Drive RollWire Size Conversion Parts Wire Reel Loading READI-REELS, Spools or CoilsTo Start the Welder Feeding Wire ElectrodeWhen triggering, the electrode Changing the Gun Receiver Bushing Electric Shock can killMaking a Weld Return to Return to Section TOCFAN Control Avoiding Wire Feeding ProblemsWire Feed Overload Protection Input Line Voltage VariationsPower MIG 215XT Table of Contents Accessories Section Accessories Magnum 250LX Push Pull Gun K2704-1 Magnum 250LX PUSH-PULL GUN and Push Pull AdapterMake a Weld with the Magnum 250LX PUSH-PULL GUN Magnum 250LX Push Pull Adapter K2705-1Accessories Table of Contents Maintenance Section Maintenance Liner Removal and REPLACE- Ment Table D.1GUN Handle Disassembly English Metric Description SizeFigure D.2 Major Component Locations Power MIG 215XT 1TABLE of CONTENTS-THEORY of Operation Section E-1 Figure E.2 Input Power Circuit Theory of OperationOutput RECTIFICATION, Contactor Control Board Figure E.2 Optional Circuits Protective Devices and Circuits Power MIG 215XT 1TABLE of Contents Troubleshooting and Repair F-1 Troubleshooting and Repair HOW to USE Troubleshooting GuidePC Board Troubleshooting Procedures Perform the Main Transformer Perform the Output Contactor Avoid contact with any portion These capacitors is toxicYour body Function Problems Tachometer Feedback Test Welding Problems BodyMake certain the shielding gas is Main Transformer Test Test DescriptionON/OFF Power Switch will be hot during these tests X4 X5X10 Main Transformer Test Wire Drive Motor and Tachometer Feedback Test J11 Wire Drive Motor and Tachometer Feedback Test J11 Output Bridge Rectifier Test Negative Lead Contactor Test Contactor Test Typical Output Voltage Waveform Machine Loaded MAX TAP G Machine Loaded to 200 Amps AT 22 VDCNormal Open Circuit Voltage Waveform MAX TAP G Machine Loaded to 180 Amps AT 16 VDC Troubleshooting and Repair Control Board Removal and Replacement Procedure Depress Locking TAB on Mounting PIN Wire Drive Motor Removal and Replacement Procedure Wire Drive Bolt Gas Hose TOC Test Description Output Diode Bridge Rectifier Output Diode Bridge RectifierMounting Bracket Mounting Bolts Rectifier Power MIG 215XT Output Capacitors Removal and Replacement Procedure Lower Right Case Wraparound Cover Capacitor Bank Assembly Lead Mounting Bolts Nuts & Lock washers Places Power MIG 215XT Main Transformer Removal and Replacement Procedure Main Transformer Mounting Bolts Replacement X4 X5 Lead Power MIG 215XT FAN Blade / Motor Removal and Replacement Procedure Rear Output Contactor Removal and Replacement Procedure Output Contactor Mounting Bolts Retest After Repair Table of Contents Diagram Section Power MIG 215XT 208/220/230V for Code POWEr miG 215XTSchEmaTic cOmplETE machiNE l12308-1 pG1 SchEmaTic cOmplETE machiNE l12308-1 pG2 Psoc 1pF Calibrate

11521 specifications

The Lincoln Electric 11521 is a highly regarded choice among welders and metal fabricators, known for its reliability and efficiency. This portable MIG welder excels in delivering professional-grade results, making it suitable for both beginners and experienced welders. One of the standout features of the Lincoln Electric 11521 is its user-friendly design, which facilitates ease of use and enhances the overall welding experience.

Equipped with a powerful 180 amp output, the Lincoln Electric 11521 is capable of tackling a wide range of welding applications. It operates on a standard 230-volt outlet, allowing users to work on various materials, including mild steel, stainless steel, and aluminum, with thicknesses up to 5/16 inch. This versatility is crucial for those who handle different types of projects, from automotive repairs to home improvement tasks.

The welder employs a spool gun for welding aluminum, ensuring a smooth and efficient feeding of the wire. This technology mitigates the problems commonly associated with feeding aluminum wire through a regular gun, providing a seamless experience. Additionally, the Lincoln Electric 11521 features an adjustable welding speed and voltage, enabling users to fine-tune their settings to match the specific requirements of each project. This adaptability leads to better penetration, bead shape, and overall weld quality.

Another important aspect of the Lincoln Electric 11521 is its durability. Constructed with high-quality materials, this welder is designed for tough jobs and can withstand the wear and tear associated with heavy use. The unit's compact size and lightweight design further enhance its practicality, making it easy to transport between job sites or store when not in use.

Safety is a crucial element in welding, and the Lincoln Electric 11521 does not compromise on this aspect. It features a thermal overload protection system, which prevents damage to the machine by shutting it down in case of overheating. The welder also includes a gas-saving mode that intelligently reduces the gas flow during idle times, maximizing efficiency.

In summary, the Lincoln Electric 11521 is a versatile and reliable MIG welder that caters to a wide range of welding needs. With its powerful output, user-friendly features, advanced technologies, and robust safety mechanisms, it is an excellent investment for professionals and hobbyists alike looking to achieve high-quality welds with ease.
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