Lincoln Electric SVM155-A service manual PC Board ASSEMBLY-CONTROL, Return to Section

Page 92

TOC

TOC

G-4

ELECTRICAL DIAGRAMS

G-4

PC BOARD ASSEMBLY-CONTROL

 

 

Return to Master

C9

X13

C8 C7

D1

D2

R75

C27

C26

X4

C25

C29

 

R83

 

 

C58

 

 

 

 

R80

 

 

R76

 

 

 

 

 

 

 

 

D25

 

 

D29

 

 

 

 

 

D24

 

 

R74

 

 

 

R73

 

 

 

 

 

 

R79

R81

R84

R93

D34

LED5

 

 

 

 

 

D26

 

 

 

D27

 

 

C30

LED3

 

R67

R68

D19

 

C24

D21

D17

R48

D18

X3

 

C61

R46

R47

C23

D16

R44

D15

 

R42

 

PC BOARD DESIGNATORS

ITEM

PART NO.

DESCRIPTION

R33

1

S19400-6810

RESISTOR,MF,1/4W,681,1%

R34

1

S19400-3321

RESISTOR,MF,1/4W,3.32K,1%

R35,R116,R125,R153

4

S19400-2671

RESISTOR,MF,1/4W,2.67K,1%

R36

1

S24000-1500

RESISTOR,WW,3/4W,150,5%

R37,R39,R48,R89,R93

5

S19400-2211

RESISTOR,MF,1/4W,2.21K,1%

R38

1

S19400-10R0

RESISTOR,MF,1/4W,10.0,1%

R40

1

S19400-6812

RESISTOR,MF,1/4W,68.1K,1%

R41,R42,R88

3

S19400-1502

RESISTOR,MF,1/4W,15.0K,1%

R43

1

S19400-3923

RESISTOR,MF,1/4W,392K,1%

R44,R101,R107,R109,R130

5

S19400-1003

RESISTOR,MF,1/4W,100K,1%

R46,R150

2

S19400-2002

RESISTOR,MF,1/4W,20.0K,1%

R47

1

S19400-1211

RESISTOR,MF,1/4W,1.21K,1%

R49

1

S16296-3

TRIMMER,MT,1/2W,500, 10%,LINEAR

R50,R133,R134

3

S19400-7500

RESISTOR,MF,1/4W,750,1%

R51,R152

2

S19400-1001

RESISTOR,MF,1/4W,1.00K,1%

R52

1

S19400-3012

RESISTOR,MF,1/4W,30.1K,1%

PC BOARD DESIGNATORS

ITEM

PART NO.

DESCRIPTION

 

C1

1

S13490-138

CAPACITOR,ALEL,1200,100V,+75/-20%

 

 

 

 

 

 

C2

1

S13490-73

CAPACITOR,ALEL,20,50V,+75/-10%

 

 

 

 

 

 

C3,C5,C6

3

S16668-4

CAPACITOR,CEMO, 2700PF, 50V,5%

 

 

 

 

 

 

C4,C16,C24,C27,C29,C31

22

S16668-11

CAPACITOR,CEMO,0.1, 50V,10%

 

C32,C35,C36,C44,C49,C50

 

 

 

 

C51,C52,C53,C54,C55,C56

 

 

 

 

C57,C58,C59

 

 

 

 

 

 

 

 

 

C7

1

S13490-121

CAPACITOR,ALEL,1000,35V,+30/-20%

 

 

 

 

 

 

C8,C9,C12,C25,C40

5

S13490-25

CAPACITOR,TAEL,4.7,35V 10%

 

 

 

 

 

 

C10

1

S13490-4

CAPACITOR,PEF,.022,200V,10%

 

 

 

 

 

 

C11

1

S13490-93

CAPACITOR,TAEL,27,35V,10%

 

 

 

 

 

 

C13,C19,C20

3

T11577-38

CAPACITOR,CD,.02,600V,+80/-20%

 

 

 

 

 

 

C15,C28,C42

3

S13490-94

CAPACITOR,PEMF,0.33,200V,10%

 

 

 

 

 

 

C17

1

S16668-3

CAPACITOR,CEMO,100P, 100V,5%

 

 

 

 

 

 

C18,C33,C34,C37,C41,C45

10

S16668-5

CAPACITOR,CEMO,.022, 50V,20%

 

C60,C61,C62,C63

 

 

 

 

TOC

TOC

C11

R15

 

 

 

D30

 

C35

R96

R95

R85

D5

C12

 

 

 

 

 

 

X9

 

 

 

R17

R16

X12

R99

C40

 

 

 

 

R100

 

T1

 

 

C62

 

 

 

C53

 

 

 

 

D35

 

 

 

 

R101

 

X5

R91

R92

R86

R94

C34

D33

 

 

 

 

C32

 

 

C57

R41

R107

R109 R143 R142 C60 D38

 

R45

 

 

 

 

 

 

 

R43

 

 

 

C43

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D39

 

 

 

 

 

 

 

 

 

 

 

 

C42

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L G3726-2

R53,R73

2

S19400-2802

RESISTOR,MF,1/4W,28.0K,1%

R54,R64,R66,R123,R129

5

S19400-1000

RESISTOR,MF,1/4W,100,1%

R55,R56,R57,R58,R59,R60

8

S19400-8250

RESISTOR,MF,1/4W,825,1%

R61,R62

 

 

 

R67,R68,R70,R111,R112,R120

7

S19400-5621

RESISTOR,MF,1/4W,5.62K,1%

R122

 

 

 

R74,R79,R127

3

S19400-2001

RESISTOR,MF,1/4W,2.00K,1%

R77,R78,R103,R104,R115

5

S19400-5110

RESISTOR,MF,1/4W,511,1%

R84

1

S19400-6192

RESISTOR,MF,1/4W,61.9K,1%

C21

1

S16668-9

CAPACITOR,CEMO,150p, 100V,5%

 

C22

1

S13490-104

CAPACITOR,TAEL,39,20V,10%

 

 

 

 

 

 

C23

1

S13490-40

CAPACITOR,TAEL,2.7,50V,10%

 

 

 

 

 

 

C26

1

S13490-63

CAPACITOR,TAEL,.47,50V,10%

 

 

 

 

 

 

C30

1

S13490-66

CAPACITOR,TAEL,47,35V 10%

 

 

 

 

 

 

C38,C39

2

T11577-57

CAPACITOR,PEF,0.1,400V,10%

 

 

 

 

 

 

C43,C48

2

S13490-42

CAPACITOR,TAEL,1.0,35V,10%

 

 

 

 

 

 

C46

1

S16668-6

CAPACITOR,CEMO,4700p,50V,10%

 

C47

1

S16668-7

CAPACITOR,CEMO,820p,50V,5%

 

C59

R88

R87

R92

1

S19400-2673

RESISTOR,MF,1/4W,267K,1%

R95,R96,R97,R98

4

S19400-1623

RESISTOR,MF,1/4W,162K,1%

CT1

1

COSMETIC_TRACE

COSMETIC TRACE

D1,D44

2

T12705-47

DIODE,AXLDS,4A,200V,UFR

R13

C10

R14

Q10

D3

DZ1

 

C41

R102

D36

R90 C33

LED4

R131

C49

 

 

 

 

 

R130

 

X8

 

C46

R121

X10

C48

 

 

 

 

 

 

 

C52

 

 

C54

 

 

R120

 

 

 

R151

 

D31

 

 

 

 

R89

 

 

 

 

D32

 

 

 

C36

R97

R98

R140

 

R150

 

D20

 

R145

 

D47

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R32

R31

 

R30

R110

R144

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D41

 

 

D40

D7

 

 

 

 

 

 

 

 

 

D46

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D22

R50

R52

R51

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D49

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X2

C56

R141

R29

R25

X1

 

R105

 

 

DZ10

 

 

R26

R104

 

C15

 

C16

R27

R103

 

R28

 

CONTRO

R99

1

S19400-5111

RESISTOR,MF,1/4W,5.11K,1%

R108

1

S19400-2213

RESISTOR,MF,1/4W,221K,1%

R119,R138

2

S19400-39R2

RESISTOR,MF,1/4W,39.2,1%

R121

1

S19400-2212

RESISTOR,MF,1/4W,22.1K,1%

R126

1

S19400-8251

RESISTOR,MF,1/4W,8.25K,1%

R128

1

T10812-62

TRIMMER,ST,1/2W,500, 10%,LINEAR

R136

1

S19400-3570

RESISTOR,MF,1/4W,357,1%

R137

1

S19400-4750

RESISTOR,MF,1/4W,475,1%

R146,R147

2

S19400-2430

RESISTOR,MF,1/4W,243,1%

R149

1

S19400-2210

RESISTOR,MF,1/4W,221,1%

T1

1

S20375-1

TRANSFORMER,PCB,PWM,FLYBACK

TP1

1

T13640-11

MOV,150VRMS,45J,14MM

TRI1

1

S18395-27

TRIAC,T220,8A,800V,WITH S18104-3HS

X1

1

S15128-16

IC,OP-AMP,QUAD,HIGH-PERF,1014

D2,D6,D7,D8,D9,D10,D11,D12

44

T12199-1

DIODE,AXLDS,1A,400V

D13,D14,D15,D16,D17,D18

 

 

 

D19,D20,D21,D22,D23,D24

 

 

 

D25,D26,D27,D29,D30,D31

 

 

 

D32,D33,D34,D35,D36,D38

 

 

 

D39,D40,D41,D42,D45,D46

 

 

 

D47,D48,D49,D50,D51,D52

 

 

 

D3,D4,D5

3

T12705-34

DIODE,AXLDS,1A,400V,FR,1N4936

D28,D37,D43

3

T12199-2

DIODE,AXLDS,1A,1000V

DZ1,DZ8

2

T12702-11

ZENER DIODE, 1W,16V,5% 1N4745A

DZ2,DZ6,DZ9

3

T12702-52

ZENER DIODE, 1W,5.1V,5% 1N4733A

DZ3,DZ7

2

T12702-29

ZENER DIODE, 1W,15V,5% 1N4744A

DZ4,DZ5,DZ10

3

T12702-27

ZENER DIODE, 1W,10V,5% 1N4740A

J1

1

S24020-16

CONNECTOR,MOLEX,MINI,PCB,16-PIN,TIN

R9

R6

C6

R10

R11

R12

R126

R127

R129

C63

R125

C47

X7

C44

R111

R112

X6

Q1

R49

C55

R40

R53

R33

D8

C17

D13

X2,X3,X4,X5

4

S15128-18

OP-AMP,QUAD, HIGH-PERF,33074

X6,X7

2

S15128-11

IC,COMPARATOR,QUAD,2901N

X8

1

S15018-9

IC,CMOS,MULTIVBRTR_MONO_DUAL_4538(SS)

X9,X10

2

S15018-13

IC,CMOS,TIMER,PROGRAMMABLE,4536(SS)

J2

1

S24020-8

CONNECTOR,MOLEX,MINI,PCB,8-PIN,TIN

J3

1

S24020-10

CONNECTOR,MOLEX,MINI,PCB,10-PIN,TIN

LED1,LED2,LED3,LED4,LED5

7

T13657-2

LED,T-1,3/4,RED,HLMP-3003

LED6,LED7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R3

R2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R8

R128

 

 

 

 

 

C37

R135

D45

C31

R69

R70

D23

C3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C51

 

 

 

C50

 

 

 

 

 

 

 

R7

 

 

 

 

 

 

 

 

 

 

 

 

R122

 

 

 

R148

 

 

 

 

 

 

 

C5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Q2

 

Q5

 

Q3

 

Q4

 

 

Q7

 

X11

 

Q8

 

 

 

 

 

 

 

 

 

 

 

C2

R123

R124

LED7

R116

D50

R113 R115

LED6

R133

R134

R132

R71

DZ6

R72

C4

 

 

 

 

 

 

 

 

 

 

 

 

 

D14

R54

C21

R39

R37

R38 LED2

R34

R35

C22

D9

D10

 

Q6

 

 

C18

 

 

D51

 

 

R152

 

X11

1

M15458-4

IC,PWM-CONTROLLER,IMODE,2842A

X12

1

S15128-10

VOLTAGE REF,ADJ, PRECISION,431I

X13

1

S18395-3

REGULATOR,HEAT-SINKASBLY,S15128-5,S18104-3

UNLESS OTHERWISE SPECIFIED:

RESISTANCE = OHMS

OCI1

1

S15000-8

OPTOCOUPLER,PHOTO-SCR,400V,MCS2401

OCI2

1

S15000-12

OPTOCOUPLER,TRIAC DRIVER,RANDM,3023

Q1,Q2,Q3,Q4,Q5,Q6,Q7

7

T12704-68

TRANSISTOR,NPN,TO226,0.5A,40V,2N4401

Q8

1

T12704-69

TRANSISTOR,PNP,TO226,0.5A, 40V,2N4403

Q9,Q10

2

S18395-5

MOSFET/HEATSINK ASBLY,T12704-61&S18104-3(SS)

R1

1

T14648-10

RESISTOR,WW,5W,1.2K,5%,SQ

R2,R3

2

S19400-3322

RESISTOR,MF,1/4W,33.2K,1%

R4,R72

2

S19400-2670

RESISTOR,MF,1/4W,267,1%

R5,R71

2

S19400-3010

RESISTOR,MF,1/4W,301,1%

R6,R80

2

S19400-6811

RESISTOR,MF,1/4W,6.81K,1%

R7,R18,R19,R23

4

S19400-1372

RESISTOR,MF,1/4W,13.7K,1%

Return to Section

Return to Section TOC

TOC

Return to Master

Return to Master TOC

TOC

R4

DZ3

R5

 

DZ2

 

 

 

 

 

 

 

 

 

R149

D48

R146

DZ8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C1

R1

R147

DZ9

Q9

D44

TP1

 

 

 

 

 

 

D42

R117

R118

 

 

 

 

 

 

 

 

 

 

 

 

C45

R119

OCI1

TRI1

C38

C39

R66

DZ7

D43

 

OCI2

 

 

R139

R136

R138

R137

R64

 

 

 

 

 

 

 

 

 

R59

R55

 

 

 

 

 

 

 

 

 

 

R114

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R60

R56

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R61

R57

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R62

R58

 

DZ5

DZ4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R65

 

 

 

 

 

 

 

 

 

 

 

 

R63

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C20

 

D12

 

C13

R77

R78

 

 

LED1

 

R153

 

D52

 

R24

C19

R23

 

 

R22

D11

R21

 

C28

D28

R20

 

D6

 

R18

 

R19

R36

R8

1

S19400-1503

RESISTOR,MF,1/4W,150K,1%

R9

1

S19400-1501

RESISTOR,MF,1/4W,1.50K,1%

R10,R132

2

S19400-1301

RESISTOR,MF,1/4W,1.30K,1%

R11

1

S19400-3320

RESISTOR,MF,1/4W,332,1%

R12

1

S19400-26R7

RESISTOR,MF,1/4W,26.7,1%

R13,R124

2

T12300-80

RESISTOR,WW,5W,0.5,5%

R14,R114

2

T14648-9

RESISTOR,WW,5W,2.5K,5%,SQ

R15,R139

2

S19400-1500

RESISTOR,MF,1/4W,150,1%

R16

1

S19400-6191

RESISTOR,MF,1/4W,6.19K,1%

R17,R117

2

S19400-2801

RESISTOR,MF,1/4W,2.80K,1%

R20,R21,R105

3

S19400-8252

RESISTOR,MF,1/4W,82.5K,1%

R22

1

S16296-5

TRIMMER,MT,1/2W,10K, 10%,LINEAR

R24,R25,R45,R69,R75,R76

22

S19400-1002

RESISTOR,MF,1/4W,10.0K,1%

R85,R86,R87,R90,R91,R94

 

 

 

R100,R102,R113,R118,R135

 

 

 

R141,R142,R143,R145,R148

 

 

 

R26,R27,R30,R81,R83,R106

6

S19400-1004

RESISTOR,MF,1/4W,1.00M,1%

R28

1

S19400-7501

RESISTOR,MF,1/4W,7.50K,1%

R29,R31,R32,R63,R65,R110

10

S19400-4751

RESISTOR,MF,1/4W,4.75K,1%

R131,R140,R144,R151

 

 

 

Return to Section

Return to Master

J2

J1

J3

 

 

CT1

 

Chg. Sheet No.

 

"X" INFO.

DESIGN INFORMATION

REFERENCE:

EQUIPMENT TYPE:

MULTI-SOURCE

 

XB

 

 

 

 

 

 

 

DRAWN BY: MB/JB

G3742-1

 

 

 

SUBJECT:

CONTROL P.C. BOARD ASSEMBLY

 

10-13-2000A

 

 

 

 

 

ENGINEER: MJK

SUPERSEDING:

 

 

 

 

 

 

 

 

 

 

SCALE: 1:1

DATE: 4-20-2000DRAWING No.: G 3726-2

 

 

 

 

APPROVED:

 

 

 

 

 

 

NOTE: Lincoln Electric assumes no responsibility for liablilities resulting from board level troubleshooting. PC Board repairs will invalidate your factory warranty. Individual Printed Circuit Board Components are not available from Lincoln Electric. This information is pro- vided for reference only. Lincoln Electric discourages board level troubleshooting and repair since it may compromise the quality of the design and may result in danger to the Machine Operator or Technician. Improper PC board repairs could result in damage to the machine.

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Contents MULTI-SOURCE TM Safety California Proposition 65 WarningsElectric Shock can kill Welding Sparks can cause fire or explosion Précautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications Multi-Source K1752-1Safety Precautions Select Proper LocationStacking TiltingFuse and Wire Sizes Input and Grounding ConnectionsOutput Connections ParallelingMULTI-SOURCE Table of Contents Operation Section Safety Instructions OperationRecommended EQUIPMENT/PROCESSES Design Features and ADVAN- TagesGeneral Description Controls and Settings Recommended EQUIPMENT/CONNECTIONSTable of Contents Accessories Factory Installed Options / Accessories Field Installed Options / AccessoriesTable of Contents Maintenance Safety Precautions Routine and Periodic MAINTE- NanceFigure D.1 Major Component Location MULTI-SOURCE Table of Contents Theory of Operation General Description Input VOLTAGE, FILTER, Contac TOR and Control Trans FormerTroubleshooting & Repair Return to Section Section TOCOperation Protection Devices and CIR Cuits SCR Operation Figure E.5 SCR OperationTable of Contents Troubleshooting & Repair Section HOW to USE Troubleshooting Guide PC Board Troubleshooting Procedures and Replacement Electric Shock can killTroubleshooting Guide Calibration Procedure Perform the Firing Board TestPerform the Main Transformer T1 TestCircuit external to the Multi Technical Specifications Main Transformer TestFunctions Problems Input Contactor TestTest Description Control Transformer T2 Voltage TestTest Procedure Figure F.1. Control Transformer Location & Leads575 VAC 43.0 VAC 460 VAC 34.50 VAC 380 VAC 28.50 VAC Secondary Thermostat Input Contactor Test Input Contactor Test 241COILRemoval and Replacement Procedure Test for Contact ContinuityMULTI-SOURCE Main Transformer T1 Voltage Test Main Transformer T1 Voltage Test Contactor TestFigure F.6. Main Secondary Lead Test Points MULTI-SOURCE Static SCR Test Static SCR Test Leads Remove Red Paint Active SCR Test Active SCR Test Active SCR Test Remove Red Paint SW1 MULTI-SOURCE Control Board Test Control Board Test See Figure F.15#341 #230 #215 #231 #263 #201 J1 MULTI-SOURCE Firing Board Test Figure F.17 Static and Active SCR TestsTable F.2. LED 7, 8 and 9 Check List Then#231 #215 #340 J8 #287 MULTI-SOURCE Meter Accuracy Check Control Board Normal Open Circuit Voltage Waveform no Load Volts Typical SCR Gate Voltage Waveform no Load MULTI-SOURCE Input Contactor Cleaning AND/OR Replacement DescriptionRemoval Procedure 240 CoilMULTI-SOURCE Control Board Replacement Procedure Control Board Firing Board Replacement Procedure Firing Board SCR Bridge / Heat Sink Assembly Replacement Procedure Bridge Assembly Mount #251 Mounting Bolt Removal of Individual SCR Heat Sink Assemblies See Figure F.26 Figure F.27Perform Meter Accuracy Test No Load Readings FAN OFFMaximum Open Circuit Voltage MULTI-SOURCE Electrical Diagrams Table of Contents Electrical Diagrams SectionWiring Diagram MULTI-SOURCESchematic Control PC Board PC Board ASSEMBLY-CONTROL Return to SectionSchematic Firing Printed Circuit Board PC Board ASSEMBLY-FIRING TP1PC Board Assembly Snubber M14312SVM Error Reporting Form

SVM155-A specifications

The Lincoln Electric SVM155-A is a state-of-the-art welding machine that excels in versatility and performance, making it ideal for both professional welders and hobbyists. This multi-process welder supports MIG, TIG, and stick welding processes, allowing users to tackle a wide range of applications with a single device. Its user-friendly design and advanced technology make it an exceptional choice for those looking to enhance their welding capabilities.

One of the main features of the SVM155-A is its robust power output, which can handle welding materials ranging from thin sheets to heavier stock. The welder offers a high duty cycle, ensuring that users can work efficiently without the need for prolonged breaks. This is especially important in industrial settings where productivity is key. Additionally, the SVM155-A is equipped with a digital display that allows for easy monitoring and precise control of the welding parameters, ensuring consistency in weld quality.

The European-designed INVERTER technology embedded in the SVM155-A significantly contributes to its lightweight and compact design. Weighing in at only 19.4 lbs, this welder is portable and ideal for fieldwork or workshops where space is limited. The inverter technology not only reduces the size and weight but also improves energy efficiency, leading to lower operational costs over time.

The SVM155-A also features advanced safety mechanisms, including over-current protection to safeguard the machine from potential damage during excessive use. It also includes a thermal overload shut-off, which prevents overheating, ensuring a longer lifespan for the welder.

Another standout characteristic of the SVM155-A is its exceptional arc stability and ease of use. The machine is designed to provide a smooth and consistent arc, reducing spatter and ensuring clean welds. Moreover, the welder is compatible with a wide range of materials, including stainless steel, aluminum, and carbon steel, further enhancing its versatility.

In conclusion, the Lincoln Electric SVM155-A is a powerful, durable, and multifunctional welding machine that incorporates advanced technologies to meet the needs of modern welding applications. Its portability, safety features, and ability to deliver high-quality welds make it an excellent investment for anyone looking to improve their welding skills or expand their capabilities in various welding projects.