Lincoln Electric SVM136-A service manual Controls and Settings, Figure B.1 Case Front Controls

Page 19

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B-5

B-5

OPERATION

CONTROLS AND SETTINGS

All operator controls and settings are located on the case front assembly. See Figure B.1 for their locations.

FIGURE B.1 – CASE FRONT CONTROLS

 

 

8

9

10

11

 

 

 

 

 

1

 

 

 

 

 

2

7

6

5

 

4

3

1. POWER SOURCE PILOT LIGHT

6. DC AMMETER

2. ON/OFF POWER TOGGLE SWITCH

7. AUXILIARY POWER CONNECTIONS FOR WIRE FEEDER AND

3. OUTPUT CONTROL POTENTIOMETER

OTHER EQUIPMENT (115V AND 42V)

4. OUTPUT CONTROL SWITCH (WITH LOCAL OR

8. VOLTMETER "+" ELECTRODE OR "-" ELECTRODE SWITCH

REMOTE POSITIONS)

9. THERMAL PROTECTION INDICATOR LIGHT

5. DC VOLTMETER

 

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1.POWER SOURCE PILOT LIGHT: This light indi- cates that the power source input contactor is ener- gized (closed). This also means that the main power transformer and all auxiliary control transformers are energized.

2.ON/OFF POWER TOGGLE SWITCH: Energizes or deengergizes the input contactor. The switch turns the machine ON or OFF. Position "I" is ON; position "0" is OFF.

3.OUTPUT CONTROL POTENTIOMETER: Controls output voltage.

4.OUTPUT CONTROL SWITCH (WITH LOCAL OR REMOTE POSITIONS): Selects the mode of control. In the "Local" position, control is by the machine con- trol panel. In the "Remote" position, control is by either a wire feeder unit or through an optional remote control device.

5.DC VOLTMETER (OPTIONAL): Displays actual out- put voltage.

6.DC AMMETER (OPTIONAL): Displays actual output current.

7.AUXILIARY POWER AND REMOTE CONTROL CONNECTIONS FOR WIRE FEEDER AND OTHER EQUIPMENT (115V AND 42V): The 14-pin amphe- nol receptacle provides either 115 or 42 VAC as well as remote control connections. Terminal strips with screw connections are located behind the hinged control panel for hard wired control. A strain relief connector is provided for cable entry. The 42 VAC auxiliary is not available at the terminal strip.

8.VOLTMETER "+" ELECTRODE OR "-" ELEC- TRODE SWITCH: Selects the electrode polarity for the remote work sensing lead (#21) when using automatic or semiautomatic wire feeders. It must agree with the actual electrode polarity chosen and with the wire feeder polarity switch on the feeder.

9.THERMAL PROTECTON INDICATOR LIGHT: This light indicates that either of the two protective ther- mostats has opened. Welding output is disabled but input power is still applied.

10.42 VAC AUXILIARY CIRCUIT BREAKER: This 10 amp breaker protects the 42 VAC auxiliary circuit.

11.115 VAC AUXILIARY CIRCUIT BREAKER: This 10 amp breaker protects the 115 VAC auxiliary circuit.

IDEALARC CV-400

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Contents Idealarc CV-400 California Proposition 65 Warnings SafetyElectric Shock can kill Cylinder may explode if damaged Sûreté Pour Soudage a L’Arc Précautions DE SûretéMaster Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications Idealarc CV-400 InstallationLocation and Ventilation Safety PrecautionsLifting Input Supply Connections Ground ConnectionReturn to Input Wire and Fuse SizeConnect Electrode and Work Leads to Output Terminals Reconnect Procedure Output ConnectionsFigure A.5 Output Terminal Connections Connect Wire Feeders Table of Contents Operation Section Operation Safety InstructionsOperating Instructions Recommended Processes Operational Features and ControlsDesign Features General DescriptionLimitations Welding CapabilityFigure B.1 Case Front Controls Controls and SettingsWelding Operation Remote ControlLocal Control Overload Protection Auxiliary PowerIdealarc CV-400 Table of Contents Accessories Factory Installed Options OPTIONS/ACCESSORIESField Installed Options Connecting the NA-3 to the Idealarc CV-400 Automatic Wire FeedersFeederterminal Connecting the NA-5 to the Idealarc CV-400Accessories Connecting the LN-7 to the Idealarc CV-400 Terminal Strip Semiautomatic Wire FeedersConnecting the LN-8 or LN-9 to the Idealarc CV-400 Idealarc CV-400 Table of Contents Maintenance Return to Return to Section TOC Safety Precautions Routine and Periodic MaintenanceFigure D.1 Idealarc CV-400 Table of Contents Theory of Operation Section Input Line VOLTAGE, Contactor and Main Transformer Theory of OperationOutput CONTROL, Rectification and Feedback Figure E.4 CV-400 Trigger and Thermal Light Circuit Protective Devices CircuitsFigure E.5 SCR Operation SCR OperationIdealarc CV-400 Table of Contents Troubleshooting & Repair Section HOW to USE Troubleshooting Guide Troubleshooting & RepairElectric Shock can kill PC Board Troubleshooting ProceduresOutput Problems Troubleshooting GuideOutput Problems SCR/Diode Perform the SCR/Diode Bridge SCR/Diode Rectifier Bridge Test Welding Problems Description Control Transformer T2 Voltage TestMaterials Needed Control Transformer T2 Voltage Test Test ProcedureRight Side View Input Contactor Test Input Contactor Test Figure F.4 Input Contactor Test Connections Test for Contact ContinuityMain Transformer T1 Voltage Test Main Transformer T1 Voltage Test Figure F.6 Main Secondary Lead Test Points Blank Main Transformer T1 Voltage Test Static SCR/DIODE Rectifier Bridge Test Static SCR/DIODE Rectifier Bridge Test SCR Anode Remove ANY Insulating Paint Cathode SCR Active SCR Test Active SCR Test Figure F.15 Heat Sink Test Points Figure F.16 SCR Tester Circuit and SCR Connections Normal Open Circuit Voltage Waveform Maximum Output Setting no LoadTypical Output Voltage Waveform Machine Loaded Typical SCR Gate Voltage Waveform Maximum Output Setting no LoadONE Output SCR not Functioning Abnormal Output Voltage Waveform Machine LoadedDescription Input Contactor CR1 CLEANING/REPLACEMENTContactor Replacement Procedure Cleaning ProcedureFAN Motor and Blade Removal and Replacement Procedure FAN Motor and Blade Removal and ReplacementSCR/DIODE Rectifier Assembly Removal and Replacement Removal and Replacement SCR/DIODE Rectifier AssemblySCR Removal and Replacement SCR Removal and Replacement Figure F.21 1/2 Wide Leaf Spring Procedure for the 1/2 Inch Wide SpringClamping Procedure For 1/4-20 CAP Screws Clamping Procedure For 1/4-28 CAP ScrewsInch Wide Spring Procedure forAfter Replacing the SCRs Mounting of Stud Type Diodes To Aluminum Heat Sinks To Aluminum Heat Sinks Mounting of Stud Type DiodesMain Transformer Removal and Replacement Removal of Lift Bail Main Transformer Removal & ReplacementFigure F.26 Choke Removal Removal of Choke and TOP Iron AssemblyFigure F.27 Epoxy MIX Application Areas Reassembly of Transformer CoilsFigure F.28 Coil Lead Placement Figure F.30 Primary Thermostat Location Reassemble the Lift Bail Reassembling the Main Transformer Into the MachineWelding Output Load Test Retest After RepairInput Idle Amps and Watts Open Circuit VoltagesIdealarc CV-400 Section G Electrical DiagramsWiring Diagram Codes 10084, 10085 Wiring Diagram Code Control PC Board G2629-1 Layout Control PC Board G2629-1 Schematic Snubber Snubber PC Board M15370-3 Schematic Idealarc CV-400
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