Lincoln Electric IM546 manual Correct Electrical Stickout ESO, Correct Welding Speed

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B-10

 

LEARNING TO WELD

 

FIGURE B.11

FIGURE B.12

WARNING

ARC RAYS can burn eyes and skin.

When using an open arc process, it Is necessary to use correct eye, head and body protection.

Protect yourself and others, read “ARC RAYS can burn” at the front of this manual.

2.The Correct Way To Strike An Arc

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

2.Position gun over joint. End of wire may be lightly touching the work.

3.Position face shield to protect face and eyes, close gun trigger, and begin welding. Hold the gun so that the contact tip to work distance is about 3/8 to 1/2 inch (10 – 12 mm).

4.To stop welding, release the gun trigger and the pull the gun away from the work after the arc goes out.

5.A ball may form at the tip end of the wire after welding. For easier restrikes (with Innershield wire) the ball may be removed by feeding out a few inches of wire and simply bending the wire back and forth until it breaks off.

6.When no more welding is to be done, turn off the machine.

3.The Correct Electrical Stickout (ESO)

The electrical stickout (ESO) is the distance from the end of the contact tip to the end of the wire.

See Figure B.12.

Once the arc has been established, maintaining the correct ESO becomes extremely important. The ESO should be approximately 3/8 to 1/2 inch (10 to 12 mm) long.

WELD-PAK 100

Contact Tip

Wire Electrode

3/8 – 1/2” (10 – 12 mm) Electrical Stickout (ESO)

The easiest way to tell whether the ESO is the cor- rect length is by listening to its sound. The correct ESO has a distinctive “crackling” sound, very much like eggs frying in a pan. A long ESO has a hollow, blowing or hissing sound. If the ESO is too short, you may stick the contact tip or nozzle to the weld puddle and/or fuse the wire to the contact tip.

4.The Correct Welding Speed

The important thing to watch while welding is the puddle of molten metal right behind the arc. See Figure B.13. Do not watch the arc itself. It is the appearance of the puddle and the ridge where the molten puddle solidifies that indicates correct weld- ing speed. The ridge should be approximately 3/8” (10 mm) behind the wire electrode.

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

FIGURE B.13

Solidifying ridge

Molten puddle

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Contents Safety Depends on You WELD-PAK 100 PlusSafety ARC Welding can be hazardousCylinder may explode if damaged Electric and Magnetic Fields IiiPrécautions DE Sûreté Sûreté Pour Soudage a LʼArcPlease Examine Carton and Equipment For Damage Immediately Master Table of Contents for ALL Sections Vii INSTALLATIONA-1 Technical Specifications WELD-PAK2INSTALLATION Safety PrecautionsIdentify and Locate Components INSTALLATIONA-3 Select Suitable LocationOutput Connections Stacking4INSTALLATION GUN InstallationWork Cable Installation Connecting Gun Cable to the WELD-PAKINSTALLATIONA-5 Figure A.56INSTALLATION Input ConnectionsRequirements For Rated Output Code Requirements for Input ConnectionsObserve all safety information throughout this manual OPERATIONB-1Fumes and Gases can be dangerous Welding Sparks can cause fire or explosion2OPERATION Wire Loading OPERATIONB-3Welding Operations Sequence of OperationFriction Brake Adjustment Wire Threading4OPERATION Cleaning Tip And Nozzle OPERATIONB-5Process Guidelines Making a WeldChanging Machine Over to Feed Other Wire Sizes 6OPERATIONWelding with Gmaw MIG Overload ProtectionLearning to Weld Learning to WeldARC-WELDING Circuit SELF-SHIELDED Fcaw Welding ARCGmaw MIG Welding ARC Process SelectionFor Gmaw MIG Process Machine SET UP for the SELF-SHIELDED Fcaw Process Common MetalsWelding Techniques for the SELF- Shielded Fcaw Process For Fcaw Innershield ProcessCorrect Electrical Stickout ESO Correct Welding SpeedElectrode Voltage Setting Wire Feed Speed oo Helpful HintsPractice Back-SteppingMachine SET UP for the Gmaw MIG Process Welding Techniques for the Gmaw MIG ProcessVoltage Setting Wire Feed Speed oo Mild SteelElectrode Joint Types and Positions PenetrationButt Welds Fillet WeldsWelding In The Vertical Position Vertical-down WeldingTroubleshooting Welds To Eliminate a Ropy Convex Bead in order of importanceTo Correct Poor Penetration in order of impor- tance To Eliminate Stubbing* in order of importanceProper Gun Handling Application Chart ACCESSORIESC-1 Optional AccessoriesMIG Conversion 2NOTES MAINTENANCED-1 Maintenance Safety PrecautionsRoutine Maintenance 2MAINTENANCE GUN and Cable MaintenanceComponent Replacement Procedures For Magnum 100L GUNMAINTENANCED-3 Changing Drive Roll4MAINTENANCE Changing LinerLiner trim length MAINTENANCED-5 GUN Handle Parts6NOTES TROUBLESHOOTINGE-1 HOW to USE Troubleshooting Guide2TROUBLESHOOTING Troubleshooting GuideProblems Possible Areas Symptoms Misadjustments Recommended Course of ActionTROUBLESHOOTINGE-3 Feeding Problems4TROUBLESHOOTING Welding ProblemsWiring Diagrams Weldpak 100 Wiring Diagram100 2NOTES WELD-PAK PartsMain Exploded Diagram 2PARTSDescription Reqʼd Complete Drive ASSEMBLY/MOTOR 4PARTSCase Front Assembly PARTS5RECTIFIER, FAN and Bracket Assembly 6PARTSCenter Panel Assembly PARTS7Magnum 100L Assembly 8PARTSSquare Wave TIG Square Wave TIG How To Read Shop Drawings New Lessons in Arc WeldingNeed Welding Training? $700.00Precaucion Guards off Superseded