Manuals / Lincoln Electric / Power Tools / Welding System

Lincoln Electric NA-5S Welding Head Installation, Places, Thread Holes View from Bottom

Models: NA-5S NA-5N NA-5SF NA-5NF

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A-5

INSTALLATION

A-5

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To install the control box on a fixture, perform the following steps and refer to Figure A.3.

1.Align the mounting holes on the back and/or bottom of the control box with the holes you put in the fixture according to the measurements provided in Figure A.3.

2.Secure the control box to the fixture using lock washers and hex head screws at each of the mounting holes.

FIGURE A.3 – CONTROL BOX

FIXTURE MOUNTING.

								VIEW FROM BACK
																			0.41
						0.28 (7.11) SLOTS													(10.41)
											4 PLACES

									0.562 DIA (14.27)


											2 HOLES


1.34										12.75
1.34								(323.85)
(34.04)																					13.77
1.71											12.00										(349.76)


(43.43)											(304.8)
											(304.8)

1.09		0.43
(27.68)	1/4-20	(10.92)
	THREAD HOLES

VIEW FROM BOTTOM

12.00

(304.8)

1.71

(43.43)

3.50

(88.9)

1/4-20 THREAD HOLES

FRONT

NOTE: DIMENSIONS ARE IN INCHES

WITH MILLIMETERS IN PARENTHESES.

WELDING HEAD INSTALLATION

The welding head can be mounted either with the standard head mounting hardware or with the horizontal head and/or vertical lift adjusters. Design the installation of your welding head so it meets the adjustability requirements of your welding application. Refer to Section C, Accessories, for more information regarding the adjustable mounting hardware.

The welding head and electrode are electrically “hot” when welding. They must be insulated from ground.

Standard head mounting hardware and insulation are shipped with the NA-5 welding head. If you are mounting the welding head on a separate fixture, provide the mounting holes for the standard head mount as specified in Figure A.4. For best arc striking, use a rigid mounting that prevents the head from moving when the electrode strikes the work.

FIGURE A.4 – WELDING HEAD

MOUNTING HOLES.

APPROXIMATE

INSULATOR

0.531 DIA. 2.88SIZE

(13.49)

(73.15)







4.265																2.62
(108.33)																(66.55)

4.5

(114.30)

NOTE: DIMENSIONS ARE IN INCHES

WITH MILLIMETERS IN PARENTHESES.

NA-5

Image 12

Lincoln Electric NA-5NF, NA-5SF service manual Welding Head Installation, Places, Thread Holes View from Bottom

Contents

Safety Depends on You NA-5NF NA-5S NA-5SFISAFETYi Safety Electric Shock can killARC Rays can burn Fumes and Gases can be dangerousCylinder may explode if damaged Welding Sparks can cause fire or explosionPrécautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Return to Master TOC Table of Contents Installation SectionInstallation Section a Installation Technical Specifications NA-5Control Cable Power Source Tachometer FT 1.2 M CableMechanical Installation Control BOX InstallationIntroduction Electric Shock can killWelding Head Installation PlacesHoles Thread Holes View from BottomElectrical Installation Input Power RequirementsControl BOX to Welding Head Connections Table A.1Power Supply to Control BOX Connections Power Source Connection Diagrams Electrode PolarityFigure A.8 Connection of NA-5 ALL to a DC-600 Figure A.9 Connection of NA-5 ALL to a DC-650 PRO Figure A.10 Connection of NA-5 ALL to a R3S-400, -600, or With no Line Voltage Compensator ObsoleteSAM Power Source Settings Power Source TAP To NA-5 Input Cable Plug Figure A.13 Connection of NA-5 to DC-1000 or DC-1500 Figure A.14 Connection of NA-5 to DC-400 or CV-400 NA-5 Table of Contents Operating Instructions SectionSafety Precautions Operating InstructionsOPERATOR’S Instructions Welding SparksControls Their Functions Exposed Controls with Lockable Cover DownControls Under the Lockable Security Cover Setup Instructions Auto TABSee the Starting and Stopping Sequences section Starting and Stopping Sequences Means of ARC StrikingTravel Starting and Stopping or Travel Starting and Stopping sectionSetting Travel Starting and Stopping Reconfiguring the Travel SequencesStarting Sequences Stopping SequencesTable B.1 Travel Sequence Lead and Switch Positions Travel Starts Travel Stops Older Models Newer ModelsWire Feed Motor Acceleration Electric Shock can kill Burnback and Electrode BackupOptional Crater Controls Table B.2 Stopping Sequence Settings Voltage Control ResponseAutomatic Shutdown Start CircuitryElectrode Backup Cold Start CircuitryAuto Stop Security of Weld Procedure Settings Table of Contents Accessories SectionAccessories Table C.1 NA-5 Automatic Welding System AccessoriesGeneral Product Number Product NameListing of Accessories K281 Solid Wire Straightener for Tiny Twinarc K225 Submerged ARC Twinarc KITK238 High Frequency Unit K239 Twinarc KIT for Innershield ElectrodesK337 Weld Timer Module SPEED-FEED Reel K349 MULTI-PROCEDURE KITK334 Start and Crater Controls Relay ModulesNA-5 Maintenance Section Maintenance Section DMaintenance Control BOXGeneral Circuit ProtectionGround Fault Fuse Protection FAST-BLOW FusePipe Plug Wire Drive Motor Changing Wire Feed Gear RatiosWire Drive Mechanism Wire StraightenersSolid Electrode Flux-Cored ElectrodeOptional Features Table of Contents Theory of Operation Section Theory of OperationInput Power Circuits General DescriptionPower and Voltage BoardsProcedure Boards CONTROL, LogicOptional START, Crater Fill and Weld Timer Boards 5E-5SCR Operation Figure E.4 SCR Operation NA-5Troubleshooting & Repair Table of Contents Troubleshooting and Repair SectionHOW to USE Troubleshooting Guide Recommended Course of ActionPC Board Troubleshooting Procedures Board can be dam- aged by static electricitySymptoms Possible AreasT2 Transformer Test Drive Motor TestPossible Areas Recommended Symptoms Perform the Wire Drive MotorCourse of Action TestTroubleshooting & Repair Problems Possible Areas Recommended Symptoms To Section TOC Perform the #21-#67 External ResistanceTestTroubleshooting & Repair Perform the DC Power Supply Transformer TestProblems Possible Areas Recommended Symptoms Troubleshooting & Repair Mode Function Problems Troubleshooting & Repair Troubleshooting & Repair Troubleshooting & Repair Problems Function Problems Wire Drive Motor TestTOC Travel Function Problems Troubleshooting & Repair Problems Possible Areas SectionAccuracy Test Function Problems Accuracy Test Perform the Meter CircuitFeedback Test If the Tach Board FeedbackPerform the Voltmeter Accuracy Perform the Meter Circuit Accuracy TestProblems Perform the Out of Voltage Range Shutdown Test Circuit breaker trips when Power board may be faulty Circuit breaker trips after Check to make sure there are not STARTING/WELDING Problems Welding Problems Function Problems Welding Problems Welding Problems PC Board LED Light Definitions PC Board LED Light Sequence Table Above Code DC Power Supply Test Test DescriptionMaterials Needed DC Power Supply Test Test ProcedurePlugs for loose or faulty connec Also check associated leadsDC Power Supply Test Table F.1 DC Power Supply Checks T1 and T2 Transformer Test Test DescriptionProcedure Figure F.2 T1 and T2 TransformersReturn to Section Return to Section TOC Voltage Board Transformer Test Test DescriptionTest Procedure Voltage Board Transformer Test24VAC Secondary Test Points Wire Feed Drive Motor Test Test DescriptionWire Feed Drive Motor Test Armature Voltage First pinsMotor Applied Voltage Test VDC supply Supply TurnedExternal Resistance Test Leads #21 and #67 External Resistance Test Leads #21 and #67 Table F.2 External Voltage Sensing Leads Test PointsTest Points Expected Comments Resistances Conditions OUT of Voltage Range Shut Down Test OUT of Voltage Range Shut Down Test Figure F.6 Voltage Board and PIN LocationsReturn to Section Return to Section TOC Tach Board Feedback Test Test DescriptionProcedure Tach Board Feedback TestVoltmeter Accuracy Test Voltmeter Accuracy Test Figure F.7 Test Meter Connection PointsCR3 Relay Wire Speed Accuracy Test Test DescriptionWire Speed Accuracy Test Test ProcedureTable F.4 Troubleshooting & Repair Meter Circuit Accuracy Test Test DescriptionMeter Circuit Accuracy Test Test for AC supply to the volt- meter PC boardNA-5 SET Volts Reading Test Voltmeter Reading Test Voltmeter PC Board Accuracy Test for AC supply to the speed- meter PC board Test for DC volts on the speed- meter PC boardTest Speedmeter Digital Meter Accuracy NA-5 SET Speed Reading Test Voltmeter Reading IPMTest Speedmeter PC Board Accuracy PC Boards Removal and Replacement DescriptionPC Boards Removal and Replacement Replacement ProcedureDigital Meter and Meter PC Board Removal and Replacement Meter PC Board Removal Procedure Figure F.11 Meter PC BOARD, Mounting Nuts and PlugDigital Meter Removal Procedure Figure F.12 Meter Bezel and Screw LocationsReplacement Procedure Tach PC Board Removal and Replacement DescriptionTach PC Board Removal and Replacement Pickup Assembly Wire Drive Motor Tach CoverPhillips Screw Disc NUT Tach PC Board Reassembly Wire Drive Motor Removal and Replacement DescriptionWire Drive Motor Removal and Replacement Motor Removal ProcedurePerform the Tach Board Removal Procedure Figure F.17 Drive Motor Motor Replacement Procedure Gear Ratio Wire Speed Range in/min m/min Retest After RepairNA-5 Electrical Diagrams Table of Contents Electrical Diagrams SectionNA-5 Wiring Diagram Logic PC Board L6242-1 Schematic KEY to SymbolsLogic PC Board L6242-2 & above Schematic Power PC Board L6252-1 Schematic C D E F G H JPower PC Board L6252-2 & above Schematic Voltage PC Board Schematic Return toControl Circuit Schematic C D E F G H L MProcedure PC Board Schematic Start Module Weld Timer Crater Module Burnback TimerOption & Timer PC Board Schematics Timer BoardMeter PC Board Schematic & Layout 21143Power Board Logic Board Miscellaneous PC Boards