Lincoln Electric SVM118-A - Manual

Lincoln Electric SVM118-A

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Table of Contents:

  • Page 2 – SAFETY; WARNING; ARC WELDING can be hazardous.; ELECTRIC SHOCK can kill.
  • Page 3 – ii
  • Page 4 – iii
  • Page 5 – iv; PRÉCAUTIONS DE SÛRETÉ
  • Page 6 – MASTER TABLE OF CONTENTS FOR ALL SECTIONS; Page
  • Page 7 – TABLE OF CONTENTS; Installation; Lifting
  • Page 8 – INSTALLATION; TECHNICAL SPECIFICATIONS - SQUARE WAVE TIG 355; Input Currents; RATED OUTPUT; 5 Amps Continuous; RECOMMENDED INPUT WIRE AND FUSE SIZES; PHYSICAL DIMENSIONS; OPERATING TEMPERATURE RANGE STORAGE TEMPERATURE RANGE
  • Page 9 – SAFETY PRECAUTIONS; SELECT SUITABLE LOCATION; STACKING; CYLINDER MAY EXPLODE if damaged.; TILTING
  • Page 10 – INPUT CONNECTIONS; GROUND CONNECTION; FIGURE A.1 – REAR PANEL
  • Page 11 – FIGURE A.2 – INPUT SUPPLY CONNECTIONS; • Do not touch electrically live parts; RECONNECT PROCEDURE; circuit breakers. Choose an input
  • Page 13 – OUTPUT CONNECTIONS; • Keep the electrode holder, TIG; TIG TORCH CONNECTION; Lengths up to
  • Page 15 – Operation
  • Page 16 – OPERATION; OPERATING INSTRUCTIONS
  • Page 17 – GENERAL DESCRIPTION; RECOMMENDED PROCESSES
  • Page 19 – CONTROLS AND SETTINGS; UPPER CASE FRONT CONTROLS; FIGURE B.1 – UPPER CASE FRONT CONTROLS
  • Page 20 – UPPER CASE FRONT CONTROL PANEL; CURRENT CONTROL SWITCH
  • Page 21 – AUTO BALANCE; LED; All machines have an adjustable Preflow time.; CAUTION
  • Page 22 – Spot Switch — A two-position toggle switch:; Start Switch — A two-position toggle switch:; Start Current Control; Locked out if the Start switch is off.; Start Time Control
  • Page 23 – • GAS & WATER LED is on when the solenoid; FIGURE B.2 – STATUS INDICATOR LIGHT SEQUENCE
  • Page 25 – LOWER CASE FRONT CONTROLS; Refer to Figure B.3 for the location of the following controls.; FIGURE B.3 – LOWER CASE FRONTCONTROLS
  • Page 26 – Do not switch polarity under load.
  • Page 27 – HAND AND FOOT AMPTROL OPERATION
  • Page 28 – FIGURE B.5 – AMPTROLS USED WITH CURRENT CONTROL IN REMOTE POSITION
  • Page 29 – WELDING OPERATION; STICK WELDING; Remove the Amptrol or Arc Start switch from the; TIG WELDING GUIDELINES; Note: Starting difficulties may often be due to not
  • Page 30 – SPECIFIC EFFECTS OF CONTROLS
  • Page 33 – TYPICAL CURRENT RANGES
  • Page 35 – Hold the Arc Start switch down until an arc is; OVERLOAD PROTECTION; If the; AUXILIARY POWER; ALL MACHINES
  • Page 36 – Accessories
  • Page 37 – ACCESSORIES
  • Page 38 – Maintenance
  • Page 39 – MAINTENANCE
  • Page 40 – FIGURE D.1 – POWER FACTOR CAPACITOR DISCHARGE DETAILS
  • Page 41 – FIGURE D.2 – GENERAL COMPONENT LOCATIONS
  • Page 42 – Theory of Operation
  • Page 43 – THEORY OF OPERATION
  • Page 44 – FIGURE E.3 – OUTPUT RECTIFICATION AND FEEDBACK CONTROL
  • Page 45 – FIGURE E.4 – HIGH VOLTAGE/HIGH FREQUENCY CIRCUIT
  • Page 46 – DC WELDING OUTPUT; FIGURE E.5 – DC WELDING OUTPUT CIRCUIT; FIGURE E.5a – SCR BRIDGE AND CHOKE CONFIGURATION FOR DC WELDING
  • Page 47 – AC WELDING OUTPUT; FIGURE E.6 – AC WELDING OUTPUT CIRCUIT; FIGURE E.6a – SCR BRIDGE AND CHOKE CONFIGURATION FOR AC WELDING
  • Page 48 – SCR OPERATION; FIGURE E.7 – SCR OPERATION
  • Page 49 – PROTECTIVE CIRCUITS; THERMAL PROTECTION
  • Page 50 – Troubleshooting & Repair Section; Abnormal Open Circuit Voltage – (AC TIG Mode, One
  • Page 51 – TROUBLESHOOTING & REPAIR; HOW TO USE TROUBLESHOOTING GUIDE; The
  • Page 52 – PC BOARD TROUBLESHOOTING PROCEDURES AND REPLACEMENT
  • Page 53 – TROUBLESHOOTING GUIDE; Observe Safety Guidelines; OUTPUT PROBLEMS
  • Page 57 – FUNCTION PROBLEMS
  • Page 60 – TIG MODE PROBLEMS; The machine must be in TIG
  • Page 61 – High Frequency Signal Test.
  • Page 67 – Check the Crater Fill Fade Out
  • Page 68 – STICK WELDING PROBLEMS
  • Page 69 – PURPOSE FOR THE PROCEDURE
  • Page 70 – TEST PROCEDURE; FIGURE F.1 – POWER FACTOR CAPACITOR DISCHARGE DETAILS
  • Page 71 – ARC START TRIGGER CIRCUIT TEST; TEST DESCRIPTION
  • Page 73 – FIGURE F.3 – ARC START TRIGGER CIRCUIT
  • Page 74 – POWER BOARD TEST
  • Page 75 – SQUARE WAVE POWER
  • Page 76 – POWER BOARD VOLTAGE TEST CHART
  • Page 77 – INPUT CONTACTOR TEST
  • Page 78 – ELECTRICAL ARCING can injure.
  • Page 81 – PILOT TRANSFORMER TEST
  • Page 82 – FIGURE F.7 - PILOT TRANSFORMER CONNECTIONS
  • Page 83 – FEED-THRU PC BOARD TEST
  • Page 85 – VIEW FROM EDGE OF BOARD; FEED THROUGH
  • Page 86 – FEED THRU PC BOARD RESISTANCE TEST POINTS; Check Points
  • Page 87 – PROTECTION PC BOARD TEST
  • Page 88 – FIGURE F.11- PROTECTION PC BOARD LOCATION AND MOUNTING DETAILS; SQUARE W
  • Page 89 – PROTECTION PC BOARD RESISTANCE TEST POINTS CHART; Test Points
  • Page 90 – MAIN TRANSFORMER TEST
  • Page 91 – FIGURE F.12 - MAIN TRANSFORMER LOCATION AND WIRING DETAILS
  • Page 92 – Secondary and Auxiliary
  • Page 94 – FIGURE F.13 - LOCATION OF CONTROL BOARD AND CONTROL TRANSFORMER; machine case top and sides.; Check for 120VAC at the primary leads
  • Page 95 – END VIEW
  • Page 96 – CONTROL PC BOARD TEST
  • Page 97 – FIGURE F.15 – CONTROL PC BOARD LOCATION; Locate the test points on the control PC
  • Page 98 – FIGURE F.16 – CONTROL PC BOARD PLUG DETAILS; Check the test points for the appropriate; CONTROL
  • Page 100 – STATIC SCR TEST
  • Page 101 – FIGURE F.17 – POWER PC BOARD PLUG LOCATIONS
  • Page 102 – FIGURE F.18 – SCR TEST POINTS
  • Page 103 – ACTIVE SCR TEST
  • Page 105 – FIGURE F.20 – SCR TEST POINTS
  • Page 106 – BATTERY TEST; Connect the SCR into the test circuit as
  • Page 107 – volts; SCOPE SETTINGS; NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM; DC STICK MODE; HIGH VOLTAGE / HIGH FREQUENCY can damage test equipment.
  • Page 108 – AC STICK MODE
  • Page 109 – DC TIG MODE
  • Page 110 – AC TIG MODE
  • Page 111 – TYPICAL OUTPUT VOLTAGE WAVEFORM – MACHINE LOADED
  • Page 113 – ABNORMAL OPEN CIRCUIT VOLTAGE – DC TIG MODE
  • Page 114 – ABNORMAL OPEN CIRCUIT VOLTAGE – AC TIG MODE; ONE OUTPUT SCR NOT FUNCTIONING
  • Page 115 – CONTROL PC BOARD REMOVAL AND REPLACEMENT; DESCRIPTION
  • Page 117 – POWER PC BOARD REMOVAL AND REPLACEMENT
  • Page 118 – PROCEDURE
  • Page 119 – INPUT CONTACTOR REMOVAL AND REPLACEMENT
  • Page 120 – FIGURE F.24 – INPUT CONTACTOR CONNECTIONS
  • Page 121 – Attach small lead H1 to the L1 terminal.
  • Page 122 – FAN MOTOR AND BLADE REMOVAL AND REPLACEMENT
  • Page 123 – FIGURE F.25- FAN MOTOR AND BLADE MOUNTING DETAILS
  • Page 124 – OUTPUT RECTIFIER REMOVAL AND REPLACEMENT
  • Page 125 – FIGURE F.26 – OUTPUT RECTIFIER CONNECTION DETAILS
  • Page 127 – SCR REMOVAL AND AND REPLACEMENT
  • Page 128 – Perform the Output Rectifier Removal; SPECIAL INSTRUCTIONS
  • Page 130 – NOTE: This procedure can only be used; FIGURE F.29 – SCR CLAMP ASSEMBLY DETAILS – 1/2” WIDE SPRING
  • Page 131 – ) Place a piece of sleeving around; FIGURE F.30 – HOUSING AND PRESSURE PAD FOR 5/8” WIDE LEAF SPRING
  • Page 132 – Install the output rectifier heat sink assem-; FIGURE F.31 – SCR CLAMP ASSEMBLY DETAILS – 5/8” WIDE SPRING
  • Page 133 – RETEST AFTER REPAIR; INPUT AMPS AT RATED MACHINE OUTPUT
  • Page 134 – AC and DC True RMS Meter – Fluke 8922A or equivalent
  • Page 136 – NOTES
  • Page 137 – ELECTRICAL DIAGRAMS; Wiring Diagram
  • Page 138 – Machine Schematic
  • Page 144 – IDENTIFICATION
  • Page 146 – I T E M; B Y P A S S
  • Page 149 – L E D D I S P L A Y; M E T E R
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SERVICE MANUAL

World’s Leader in Welding and Cutting Products Premier Manufacturer of Industrial Motors

Sales and Service through subsidiaries and Distributors Worldwide

22801 St. Clair Ave. Cleveland, Ohio 44117-1199 U.S.A. Tel. (216) 481-8100

SVM118-A

August, 1998

For use with machines having Code Numbers:

9951
9952
9953
9954
9955

SQUARE WAVE TIG 355

Safety Depends on You

Lincoln arc welding and cutting
equipment is designed and
built with safety in mind.
However, your overall safety
can be increased by proper
installation . . . and thoughtful
operation on your part. DO
NOT INSTALL, OPERATE OR
REPAIR THIS EQUIPMENT
WITHOUT READING THIS
MANUAL AND THE SAFETY
PRECAUTIONS CONTAINED
THROUGHOUT. And, most
importantly, think before you
act and be careful.

RETURN TO MAIN INDEX

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Summary

Page 2 - SAFETY; WARNING; ARC WELDING can be hazardous.; ELECTRIC SHOCK can kill.

Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC SAFETY i i SQUARE WAVE TIG 355 WARNING PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHILDRENAWAY. PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING. Read and understan...

Page 3 - ii

Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC SAFETY ii ii SQUARE WAVE TIG 355 WELDING SPARKS cancause fire or explosion. 4.a. Remove fire hazards from the weld-ing area. If this is not possible,cover them to prevent the weldingsparks from starting a fire.Re...

Page 4 - iii

Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC Retur n to Master TOC SAFETY iii iii SQUARE WAVE TIG 355 FOR ENGINEpowered equipment. 7.a. Turn the engine off before troubleshooting and maintenance work unless the maintenance work requires it to be running. 7.b. Operate engines in ...

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