Lincoln Electric SVM 119-A service manual Connect Shielding GAS

Page 13

A-4

INSTALLATION

A-4

 

 

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

For the 230/460/575V/ 60 HZ model which is not equipped with a plug, an input cord, or a receptacle, the input power supply leads must be connected directly to the Reconnect Panel as shown in Figure A.3. Refer to Technical Specifications at the begin- ning of this chapter for proper wire sizes.

1.Strip 1/2" (13mm) of insulation from the input power supply leads.

2.Connect the input power leads to terminals L1 and L2 on the Reconnect Panel Assembly.

3.Torque the terminal screws to 16 in.-lbs. (1.8nm).

FIGURE A.3 - Input Power Connection For 230/460/575 Volt Models.

CONNECT SHIELDING GAS

Customer must provide cylinder of appropriate type of shielding gas for gas metal arc welding for the process being used. See Figure A.4 for the location of the com- ponents used to connect the air supply cylinder.

WARNING

Gas under pressure is explosive.

Always keep gas cylinders in an

upright position and always keep

chained to undercarriage or sta-

tionary Y support. See American National Standard Z-49.1, “Safety in Welding and Cutting” published by the American

Welding Society.

____________________________________

1.Set the gas cylinder on the rear platform of the WIRE-MATIC 255.

2.Hook the chain in place to secure cylinder to rear of welder.

3.Remove the cylinder cap.

4.Inspect the cylinder valves for damaged threads, dirt, dust, oil or grease.

a. Remove dust and dirt with a clean cloth.

NOTE: DO NOT ATTACH THE REGULATOR IF OIL, GREASE OR DAMAGE IS PRESENT! Inform your gas supplier of this condition. Oil or grease in the pres- ence of high pressure oxygen is explosive.

5.Stand to one side away from the outlet and open the cylinder valve for an instant to blow away any dust or dirt which may have accumulated in the valve outlet.

BE SURE TO KEEP YOUR FACE AWAY FROM THE VALVE OUTLET WHEN OPENING THE VALVE.

6.Inspect the regulator for damaged threads, dirt, dust, oil or grease.

a. Remove dust and dirt with a clean cloth.

NOTE: DO NOT USE THE REGULATOR IF OIL, GREASE OR DAMAGE IS PRESENT! Have an authorized repair station clean the regulator or repair any damage.

Return to Section TOC

Return to Master TOC

WIRE-MATIC 255

Image 13
Contents Safety Depends on You WIRE-MATICElectric Shock can kill SafetyARC Rays can burn Fumes and Gases can be dangerousWelding Sparks can cause fire or explosion Cylinder may explode if damagedMay be dangerous Electric and MAG- Netic FieldsIii Sûreté Pour Soudage a L’Arc Précautions DE SûretéWIRE-MATIC Table of Contents Table of Contents Table of Contents Installation Section InstallationTechnical Specifications Wire-Matic-255 Select Proper Location Safety PrecautionsInput Connections StackingFuse and Wire Sizes Connect Shielding GAS Figure A.4 Input Gas Supply Connections Reconnect ProcedureFigure A.5 Reconnect Diagram For 208/230/1/60 Machines Connections Connect Output ComponentsGUN and Cable Installation Wire Size Conversion PartsWIRE-MATIC Operation Table of Contents Operation SectionGeneral Description Safety InstructionsWELDING, Cutting Recommended Processes and Equipment Design Features AdvantagesLimitations Machine CapabilityDuty Cycle Amps Volts Figure B.1 Operator Controls Controls and SettingsFigure B.2 Wire Reel Loading Using the Wire Drive RollFeeding Electrode Operating Steps Setting Idle Roll PressureMaking a Weld WIRE-MATIC Table of Contents Accessories Section AccessoriesMagnum GUN Connection KIT Optional K466-6 OPTIONS/ACCESSORIESK672-1 Spool GUN Adapter KIT Making a Weld with the Spool GUN Adapter K672-1 Installed Timer KIT Installation Optional K585-1 Timer KIT K585-164 1.2mm Aluminum Feeding KIT K673-1 Drive Roll KitsK468 8 Spool Adapter K363P READI-REEL AdapterDual Cylinder Mounting KIT K671-1 Table of Contents Maintenance Section MaintenancePerform the following daily Routine and Periodic MaintenanceMaintenance Contact TIP and GAS Nozzle Installation Cable CleaningDrive Rolls and Guide Tubes GUN Tubes and NozzlesFigure D.2 Liner maintenance Liner Removal ReplacementTo open up the handle GUN Handle DisassemblyDescription English Size Metric Size WIRE-MATIC Theory of Operation Table of Contents Theory of Operation SectionTransformer Input Line Voltage and MainFeedback Control Output RectificationFigure E.4 Constant Voltage Output Constant Voltage OutputFeedback Wire Drive MotorThermal Protection Figure E.6 SCR Operation SCR OperationWIRE-MATIC Table of Contents Troubleshooting & Repair Section Troubleshooting & RepairRecommended Course of Action HOW to USE Troubleshooting GuideElectric Shock can kill PC Board Troubleshooting ProceduresBoard can be dam- aged by static electricity Main Transformer Rectifier Assembly Test To Section TOC SCR Rectifier Perform the Wire Drive Motor Trolyte in these capacitors is Liquid elecPerform the Output Rectifier Test Description Main Transformer TestMaterials Needed ON/OFF Power Switch will be hot during these tests Main Transformer Test Test ProcedureLead Plug Location Static SCR Rectifier Assembly Test Leads Figure F.4 SCR 1 Test Points Active SCR Rectifier Assembly Test Leads SCR connections Figure F.7 SCR Tester CircuitWire Drive Motor and Tachometer Feedback Test Wire Drive Motor and Tachometer Feedback Test Test Procedure Test for Feedback Voltage to the Control Board Test for Supply Voltage to TachometerNormal Open Circuit Voltage Waveform Scope SettingsTypical Output Voltage Waveform Machine Loaded Machine Loaded to 250 Amps AT 26 VDC Scope SettingsMachine Loaded to 220 Amps AT 22 VDC Scope Settings Troubleshooting & Repair Typical SCR Gate Voltage Waveform Removal and Replacement Procedure Control PC Board Removal and ReplacementRemoval and REPLACE- Ment Procedure Wire Drive Assembly Removal and Replacement Figure F.11 Wire Drive Assembly Removal ProcedureSCR Output Rectifier Removal & Replacement Disconnection Heat Sink Lead Right side heat sink See Figure F.14Capacitor Bank Removal and Replacement Components Bank Removal ReplacementMain Transformer Removal and Replacement Power Switch FAN Motor and FAN Removal and Replacement Figure F.16 Fan Motor and Fan Removal Components FAN Motor and FAN Removal and Replacement ProcedureTroubleshooting & Repair Open Circuit Voltage Wire Speed RangeInput Volts/Hertz 230/60 375WIRE-MATIC Table of Contents Electrical Diagrams Section WIRE-MATIC Wiring Diagram 208/230 Code Electrical DiagramsWiring Diagram 230/460/575 Code Wire Matic 255 230 / 460Control PC Board G2803 Schematic Control PC Board G2803 Layout Wirematic 255 Control