Hobart Welding Products OM-498 Troubleshooting Burn-Through, Troubleshooting Waviness Of Bead

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11-19. Troubleshooting – Burn-Through

Burn-Through – weld metal melting completely through base metal resulting in holes where no metal remains.

Possible Causes

Corrective Actions

 

 

Excessive heat input.

Select lower amperage. Use smaller electrode.

 

 

 

Increase and/or maintain steady travel speed.

 

 

11-20. Troubleshooting – Waviness Of Bead

Waviness Of Bead – weld metal that is not parallel and does not cover joint formed by base metal.

Possible Causes

Corrective Actions

 

 

Unsteady hand.

Use two hands. Practice technique.

 

 

11-21. Troubleshooting – Distortion

 

 

 

Distortion – contraction of weld met-

 

 

 

al during welding that forces base

 

 

 

metal to move.

 

 

Base metal moves

 

 

 

 

in the direction of

 

 

 

 

the weld bead.

 

 

 

Possible Causes

 

Corrective Actions

 

 

 

Excessive heat input.

 

Use restraint (clamp) to hold base metal in position.

 

 

 

 

 

 

 

Make tack welds along joint before starting welding operation.

 

 

 

 

 

 

 

Select lower amperage for electrode.

 

 

 

 

 

 

 

Increase travel speed.

 

 

 

 

 

 

 

Weld in small segments and allow cooling between welds.

 

 

 

 

OM-498 Page 48

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Contents Processes OM-498Description From Hobart to You Table of Contents Page Symbol Usage Arc Welding HazardsElectric Shock can kill ARC Rays can burn eyes and skinEngine Hazards Battery Explosion can Blind Moving Parts can cause injuryEngine Exhaust Gases can kill Engine Heat can cause firePrincipal Safety Standards EMF InformationRadiation can cause interference ARC Welding can cause interferenceSignification des symboles Consignes DE SÉ Curité Lire Avant UtilisationUN Choc É Lectrique peut tuer LES Fumé ES ET LES GAZ peuvent ê tre dangereuxLE Soudage peut provoquer un in- cendie ou une explosion DES Particules Volantes peuvent blesser les yeuxDES PIÈ CES Chaudes peuvent provoquer des brû lures graves LE Bruit peut affecter l’ouïeDES Organes Mobiles peuvent provoquer des blessures ’EXPLOSION DE LA Batterie peutLA Chaleur DU Moteur peut pro- voquer un incendie LA Chute DE L’APPAREIL peut blesserPrincipales normes de sé curité Information sur les champs é lectromagné tiquesLE Soudage À L’ARC risque de provoquer des interfé rences Consignes relatives aux stimulateurs cardiaquesSpecifications Symbol DefinitionsWeld, Power, And Engine Specifications DefinitionsDimensions, Weights, And Operating Angles Fuel Consumption Kohler-Powered UnitsDimensions Weight Kohler-Powered UnitsFuel Consumption Honda-Powered Units Exceeding duty cycle can damage unit and void warrantyDuty Cycle 100% Duty Cycle at 80 Amperes CC/DCAuxiliary Power Curve Volt-Ampere CurvesInstalling Welding Generator InstallationGrounding Generator To Truck Or Trailer Frame Grounding Generator When Supplying Building Systems Use ground device as stated in electrical codesEngine Prestart Checks Honda-Powered Units Connecting The Battery Honda Electric-Start Models OnlyOil Connect negative cable lastConnecting To Weld Output Terminals Selecting Weld Cable Sizes45 m 60 m 70 m 90 m 105 m 120 m Stop engine beforeControls Kohler-Powered Units Operating the Welding Generator60 Hz Choke Control LeverControls Honda-Powered Units See Section Recoil-Start 2Electric-StartDescription Of Controls Honda-Powered Units See Section Operating Auxiliary Equipment Auxiliary Power Panel 196 921 CSACircuit Breakers CB1 and CB2 Optional Auxiliary Power Panels Auxiliary Power Panel 495Australia Europe Auxiliary Power Panel 196 Auxiliary Power Panel 495 South America AsiaAuxiliary Power Panel Ratings It exceeds 3500WPlug Wired For 120/240 Wire LoadPlex receptacle shares a load with One half of the 240 V receptacleMaintenance Maintenance Label Overload Protection Honda-Powered Units OnlyAdjusting Engine Speed Kohler-Powered Units Weld/Power Speed AdjustmentTop View Idle Speed Adjustment Stop engine. Close fuel valve Top ViewAdjusting Engine Speed Honda-Powered Units Throttle Control Lever Adjustment ScrewStop engine. Close fuel valve Tools Needed 3/8Troubleshooting TroubleshootingAuxiliary Power WeldingCheck battery voltage Honda electric-start models only Viscosity oil for operating temperatureEngine Make starting difficultElectrical Diagrams Circuit Diagram For Welding GeneratorWiring Diagram For Welding Generator Wiring Diagram For Auxiliary Power Panels 1 Wiring Diagram For Auxiliary Power Panels 2 Auxiliary Power Guidelines Selecting EquipmentGrounding When Supplying Building Systems How Much Power Does Equipment Require?Earth ground if supplying Rating DataApproximate Power Requirements For Industrial Motors Approximate Power Requirements For Farm/Home EquipmentIndustrial Motors Rating Starting Watts Running Watts Farm/Home Equipment Rating Starting Watts Running WattsApproximate Power Requirements For Contractor Equipment Contractor Rating Starting Watts Running WattsPower Required To Start Motor How Much Power Can Generator Supply?Single-Phase Induction Motor Starting Requirements KVA/HP x HP xPower Company Service Obtain and install correct switchSafety practices 120 Single-PhaseSelecting Extension Cord Use Shortest Cord Possible Current Load Watts AmperesWeld current starts when electrode touches work- piece Stick Welding ProcedureStick Welding Smaw Guidelines Striking an Arc Scratch Start Technique Electrode and Amperage Selection ChartStriking an Arc Tapping Technique Poor Weld Bead Characteristics Good Weld Bead CharacteristicsPositioning Electrode Holder 9090 End View of Work AngleConditions That Affect Weld Bead Shape Electrode Movement During WeldingButt Joints Lap JointTee Joint 16 in 1.6 mm Tack WeldsTroubleshooting Porosity Troubleshooting Excessive SpatterWeld Test Possible Causes Corrective ActionsTroubleshooting Lack Of Penetration Troubleshooting Incomplete FusionTroubleshooting Excessive Penetration Troubleshooting Waviness Of Bead Troubleshooting Burn-ThroughTroubleshooting Distortion OM-498 Parts List 31-FigDia Part South Africa Australia CanadaEurope America Auxiliary Power Panel 495 Canada Auxiliary Power Panel 495 253 South AfricaAuxiliary Power Panel 495 289 Australia Auxiliary Power Panel 495 290 EuropeOM-498 Service SupportHobart Welding Products Contact your Distributor forCall