Lincoln Electric SVM136-A Automatic Wire Feeders, Connecting the NA-3 to the Idealarc CV-400

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Section TOC

Master TOC

C-3

C-3

ACCESSORIES

CONNECTION OF LINCOLN ELECTRIC AUTOMATIC OR SEMIAUTOMATIC WIRE FEEDERS

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WARNING

ELECTRIC SHOCK can kill.

•Only qualified personnel should per- form this maintenance.

•Turn the input power OFF at the dis- connect switch or fuse box before working on this equipment.

•Do not touch electrically hot parts.

•Insulate yourself from work and ground.

NOTE: When using a CV-400 with wire feeders, there may be a small spark if the electrode contacts the work or ground within a few seconds after releasing the trig- ger. With some wire feeders, when the electrical inter- lock is in the ON position the arc can restart if the elec- trode touches the work or ground during these few sec- onds. Refer to K828-1 capacitor discharge circuit ear- lier in this section.

The following descriptions show how to connect the wire feeders using the terminal strip.

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• Always wear dry insulating gloves.

Auxiliary power for wire feeder operation is available at both a 14-pin amphenol and at terminal strips with screw-type connections located behind the hinged con- trol panel on the front of the machine. The 14-pin amphenol can provide both 115 VAC (pins A and J) and 42 VAC (pins I and K). The terminal strip provides only 115 VAC (terminals 31 and 32). The two circuits are iso- lated, and each is protected by a 10A circuit breaker.

AUTOMATIC WIRE FEEDERS

CONNECTING THE NA-3 TO THE IDEALARC CV-400

1.Set the CV-400 POWER toggle switch to the OFF (0) position.

2.Disconnect main AC input power to the CV-400.

3.Connect the wire feeder control cable leads to the CV-400 terminal strip as shown in Figure C.2.

4.Connect the wire feeder control cable ground lead to

the frame terminal marked .

NOTE: The CV-400 must be properly grounded.

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FIGURE C.2

NA-3 WIRE FEEDER CONNECTION TO THE IDEALARC CV-400

NA-3 WIRE

FEEDERTERMINAL

CONTROL

CABLESTRIPS

TO	21
AUTOMATIC	21
CONTROL	4
BOX	4
BOX
GND	2
21	BLANK
4	31
2	32
31
32	75
	75
75	76
75	77
76	77
76
77
	-	+
	NEGATIVE	POSITIVE
		ELECTRODE
	TO	CABLE TO
	TO	AUTOMATIC
	WORK	AUTOMATIC
	WORK	EQUIPMENT
		EQUIPMENT

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 Design Features Operational Features and ControlsGeneral Description Recommended ProcessesLimitations 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 MachineInput Idle Amps and Watts Retest After RepairOpen Circuit Voltages Welding Output Load TestIdealarc 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