Lincoln Electric SVM176-A service manual Theory of Operation Section, Section E E-2E-2E-3E-3E-3E-4

Page 23

Section E

TABLE OF CONTENTS

Section E

 

- THEORY OF OPERATION SECTION -

 

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Theory of Operation . . . . . . . . . . . . . . . .

General Description . . . . . . . . . . . . . .

Input Power Circuit . . . . . . . . . . .

Control Circuit Operation . . . . . . . . . .

Volts and Speed Control Circuits Trigger and Interlock Circuits . . . .

Optional Circuits . . . . . . . . . . . . . . . . .

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Section E E-2E-2E-3E-3E-3E-4

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Return to Master TOC

Return to Master TOC

FIGURE E.1 GENERAL DIAGRAM

VOLTMETER

+

WIRE SPEED CONTROL

 

 

 

 

 

 

 

 

 

 

 

 

REDUCED SPEED CONTROL

10K, 4 W

 

 

 

 

 

567 521

 

 

 

 

A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R12

535

 

 

 

 

 

 

 

 

 

644

B

 

 

 

 

 

601

 

 

 

 

 

 

 

 

 

 

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D

 

 

 

 

 

642

 

 

 

 

 

1

2

3

4

5

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOLTAGE CONTROL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10K, 4 W

 

 

 

 

 

535

 

 

 

 

 

 

 

 

 

 

 

 

R75

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

75

 

 

 

 

 

LN-23P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

539

 

 

 

 

 

 

 

 

 

76

 

 

 

 

 

CONTROL

 

 

 

 

 

 

 

647

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

77

 

 

 

 

 

P.C. BOARD

 

 

 

 

 

 

 

 

 

 

 

 

3.5 A CIRCUIT

 

 

 

 

 

 

 

 

 

 

541

 

W

 

 

 

 

 

BREAKER

 

 

 

 

 

 

 

 

 

 

100, 1

R76

82V, 12J

604

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

4

2

5

3

6

 

TP2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

602

 

 

 

 

 

 

 

 

 

 

 

 

 

 

641

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

567A

67

642

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

567

521

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BLACK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WHITE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WIRE FEED MOTOR

 

 

 

 

 

GUN TRIGGER SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

604

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

602

 

A

8 PIN CONNECTOR

H

F

G

E

C

D

 

 

 

 

 

 

 

 

 

 

 

 

6 PIN CONNECTOR

F

E

D

C

B

A

 

 

 

 

 

 

 

 

 

 

 

 

77

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

604

 

75

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

647

 

76

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REED SWITCH ACTIVATED

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

521

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BY WELDING CURRENT

602

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

604

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ELECTRODE (-)

 

 

 

 

 

 

GUN CONDUCTOR BLOCK

 

WORK

 

WORK (+)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

21

LN-23P

Image 23
Contents LN-23P Safety Depends on YouElectric Magnetic Fields SafetyPowered equipment For EngineCan be dangerous Electric Shock can kill ARC Rays can burnFumes and Gases Iii Cylinder may explodeCause fire or explosion If damaged For ElectricallyTransformateur ET À Précautions DE SûretéPrécautions DE Sûreté Pour LES Machines À Souder ÀMaster Table of Contents for ALL Sections Table of Contents Installation Section Environmental Rating InstallationTechnical Specifications LN-23P Sensing Work Lead Safety PrecautionsInput Cable Work Cable and Remote VoltageInnershield GUN and Cable Wire Drive Rolls and Guide TubesOptional Features Installation Power Source AccessoriesLN-23P Operation Section B Table of ContentsOperation Section Product Description Loading the Wire ReelOperation Making the Weld Adjusting Wire Feed SpeedDrive Roll Pressure VoltageLN-23P Accessories Section C Accessories SectionK350 Adapter KIT Enclosed Wire Reel SupportOptional Equipment GUN and Cable AssembliesMaintenance Section D Maintenance SectionRemoving Idle Roll Assembly MaintenanceGUN and Cable Maintenance Wire Drive Assembly MaintenanceNameplates Circuit ProtectionLN-23P Section E E-2E-2E-3E-3E-3E-4 Theory of Operation SectionGeneral Description Input Power CircuitTheory of Operation Figure E.3 Control Circuits K350 / K350-1ADAPTER Kits Optional CircuitsK350 / K350-1ADAPTER Kits LN-23P Section F-1 Troubleshooting and RepairTroubleshooting and Repair Section F Important Troubleshooting Tips How To Use Troubleshooting GuideElectric Shock Troubleshooting & RepairPC Board Troubleshooting Procedures Gun Perform Potentiometer Test Call LN-23P K350 Adapter ProblemsMaterials Needed Wire Feeder TestTest Description Test Procedure Wire Feeder TestGUN Test GUN Test 10TROUBLESHOOTING and REPAIRF-10Feed Head Test Feed Head Test 12TROUBLESHOOTING and REPAIRF-12Potentiometer Test Potentiometer Test 14TROUBLESHOOTING and REPAIRF-14Wire Speed Control Potentiometer K350-1 Adapter Test K350-1 Adapter Test 16TROUBLESHOOTING and REPAIRF-16Measurement Points Expected Reading Calibration Check 18TROUBLESHOOTING and REPAIRF-18Section G-1 Electrical Diagrams SectionElectrical Diagrams Section G Wiring Diagram Entire Machine M14197 Electrical DiagramsSchematic Entire Machine L6518 Wiring Diagram K350 Adapter KIT M14247 Wiring Diagram K350-1 Adapter KIT M17514 Machine Schematic for K350/K350-1 Adapter PC Board Assembly for Codes below 10892 G1528-4 PC Board Assembly for Codes 10892 and Higher G4184-3 Schematic for LN-23P Codes 10892 and Higher L11838-3

SVM176-A specifications

The Lincoln Electric SVM176-A is a robust and versatile semiautomatic wire feeder designed to cater to a wide range of welding applications. Known for its reliability and ease of use, the SVM176-A is particularly favored in both industrial and construction settings, where efficiency and performance are paramount.

One of the standout features of the SVM176-A is its compact design. This relatively lightweight unit is easy to transport and can fit into tight spaces, making it an ideal choice for mobile applications or projects that require more maneuverability. The unit's construction is durable and built to withstand the rigors of demanding work environments, ensuring longevity and consistent performance.

The SVM176-A supports various welding processes, including MIG (Metal Inert Gas) and flux-cored arc welding, providing versatility for different materials and thicknesses. This adaptability is enhanced by its ability to accommodate a variety of wire sizes, allowing users to select the ideal wire type for their specific project requirements. The equipment also features adjustable wire feed speed, helping to ensure optimal weld quality by allowing operators to tailor their settings based on the needs of the job.

Innovative technologies in the SVM176-A contribute to its performance. The unit is equipped with a digitally controlled microprocessor that streamlines operations, providing enhanced control over welding parameters. This advanced technology enables users to achieve precise welds consistently, minimizing the risk of defects and improving overall efficiency.

Another remarkable characteristic of the SVM176-A is its user-friendly interface. The unit features easy-to-read displays and intuitive controls, enabling operators to make quick adjustments without having to consult an extensive manual. This is particularly beneficial in fast-paced work environments where time is of the essence.

Furthermore, the Lincoln Electric SVM176-A boasts a range of safety features, including thermal overload protection and a sturdy casing, which safeguard both the equipment and the operator. With these characteristics combined, the SVM176-A stands out as a preferred choice for professional welders seeking reliability, versatility, and operational excellence in their equipment. This exceptional wire feeder continues to uphold Lincoln Electric's commitment to quality and performance in welding technology.