Lincoln POWER-ARC 4000 Correct Welding Position Correct Arc Length, Correct Way to Strike An Arc

Page 28

B-13

 

OPERATION

B-13

 

 

 

 

1. The Correct Welding Position

3. The Correct Arc Length

 

Illustrated is the correct welding position for right-handed people. (For left-handed people it is opposite.)

Whenever possible, weld from left to right (if right- handed). This enables you to see clearly what you are doing.

Hold the electrode at a slight angle as shown in Figure 5.

15-20°

 

 

90°

side view

end view

Correct Welding Position

Figure 5

2. The Correct Way to Strike An Arc

Be sure the work clamp makes good electrical contact to the work.

Lower your headshield and scratch the electrode slowly over the metal, and you will see sparks fly. While scratching, lift the electrode 1/8” (3.2mm) and the arc is established.

NOTE: If you stop moving the electrode while scratching, the electrode will stick.

NOTE: Most beginners try to strike the arc by a fast

jabbing motion down on the plate. Result: They either stick their electrode or their motion is so fast that they break the arc immediately.

The arc length is the distance from the tip of the electrode core wire to the base metal.

Once the arc has been established, maintaining the correct arc length becomes extremely important. The arc should be short, approximately 1/16 to 1/8” (1.6- 3.2mm) long. As the electrode burns off, the elec- trode must be fed to the work to maintain correct arc length.

The easiest way to tell whether the arc has the correct length is by listening to its sound. A nice, short arc has a distinctive, “crackling” sound, very much like eggs frying in a pan. The incorrect, long arc has a hollow, blowing or hissing sound.

4. The Correct Welding Speed

The important thing to watch while welding is the pud- dle of molten metal right behind the arc. DO NOT WATCH THE ARC ITSELF. The appearance of the puddle and the ridge where the molten puddle solidi- fies indicates correct welding speed. The ridge should be approximately 3/8” (9.5mm) behind the electrode.

Ridge where puddle solidifies

Molten puddle

Most beginners tend to weld too fast, resulting in a thin, uneven, “wormy” looking bead. They are not watching the molten metal.

IMPORTANT: It is not generally necessary to weave the arc forward, backward or sideways. Weld along at a steady pace, and you will have an easier time.

NOTE: When welding on thin plate, you will find that you have to increase the welding speed, whereas when welding on heavy plate, it is necessary to go more slowly to ensure fusion and penetration.

POWER-ARC 4000

Page 27 Page 29
Image 28
Page 27 Page 29
Contents POWER-ARC Safety California Proposition 65 WarningsElectric Shock can kill Welding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Please Examine Carton and Equipment For Damage Immediately On-Line Product RegistrationMaster Table of Contents for ALL Sections Installation Technical Specifications POWER-ARCSafety Precautions Location and VentilationStoring Engine Exhaust can killPRE-OPERATION Engine Service Power-Arc 4000 Typical Fuel Consumption Muffler DeflectorSpark Arrester 8 HP Carb. Certified 9 HP Honda 9 HP Kool Bore PlusWelding Cable Connections Electrical Output ConnectionsCable Size and Length Auxiliary Power Receptacles Cable InstallationMachine Grounding Plugs and HAND-HELD EquipmentPremises Wiring Circuit BreakersTable A.2 Electrical Device USE with the POWER-ARC Type Common Electrical Devices Possible ConcernsSafety Instructions OperationOperating Instructions General DescriptionOperational Features and Controls Design Features AdvantagesRecommended Applications Welding CapabilityControls and Settings GENERATOR/WELDER ControlsGasoline Engine Controls Before Starting the Engine Engine OperationStarting the Engine Running the Engine Stopping the EngineBREAK-IN Period Generator Operation General InformationTable B.3 Generator Power Applications Welding Operation Control Function / Operation Current Control DialMaterial Thickness Electrode Type Size Setting Welding GuidelinesStick Welding What Happens in the Arc? Welding arcCorrect Welding Position Correct Arc Length Correct Way to Strike An ArcCorrect Welding Speed Side viewCommon Metals Types of WeldsUse the following Do the followingPenetration Fillet WeldsMultiple Pass Welds Welding in the Vertical PositionVertical-Up Welding Vertical-Down WeldingHow to Hardface the Sharp Edge Metal to Ground Wear Overhead WeldingWelding Sheet Metal Hardfacing To Reduce WearWelding Cast Iron Cast Iron Plate PreparationSelecting Electrodes Out-of-Position Group AWS E6011High-Speed Group AWS E6013 Low Hydrogen Group Stable-Arc E7018OPTIONS/ACCESSORIES AccessoriesLincoln Electric Accessories Maintenance Routine and Periodic MaintenanceEngine Maintenance Engine AdjustmentsFigure D.2 Clean Rotating SCREEN/FINGER GUARD/DEBRIS Guard Part Table D.1 Engine Maintenance PartsHonda GENERATOR/WELDER Maintenance Figure D.5. Brush Removal and ReplacementFigure D.6. Major Component Locations Troubleshooting HOW to USE Troubleshooting GuideSymptoms Possible AreasTroubleshooting Engine requires service to head, head gasket, and/or valves Diagrams Wiring Diagram Power ARC 4000 Codes 10671 S25341Dimension Print Power ARC POWER-ARC POWER-ARC Precaucion Warnung
Top Page Image Contents