Hobart Welding Products Stick Welding Troubleshooting: Solutions for Common Welding Issues

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13-19. 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.

 

 

13-20. 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.

 

 

13-21. 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-945 Page 52

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Contents Processes DescriptionFrom Hobart to You Table of Contents Table of Contents Symbol Usage Arc Welding HazardsEngine Hazards Compressed Air Hazards Principal Safety Standards California Proposition 65 WarningsEMF Information Radiation can cause interferenceSignification des symboles − Consignes DE Sécurité − Lire Avant UtilisationUN Choc Électrique peut tuer LES Fumées ET LES GAZ peuvent être dangereuxLE Soudage peut provoquer un in- cendie ou une explosion DES Particules Volantes peuvent blesser les yeuxDES Pièces Chaudes peuvent provoquer des brûlures graves LE Bruit peut affecter l’ouïe’EXPLOSION DE LA Batterie peut DES Organes Mobiles peuvent provoquer des blessuresLA Chaleur DU Moteur peut pro- voquer un incendie ’AIR Comprimé peut provoquer des blessuresPrincipales normes de sécurité Information sur les champs électromagnétiques− Specifications Symbol DefinitionsWeld, Power, and Engine Specifications − DefinitionsDo not move or operate unit where it could tip Dimensions, Weights, and Operating AnglesGenerator Power Curve Fuel Consumption All Models Duty CycleMaterial Thickness Reference Chart Volt-Ampere Curves− Installation Installing Welding GeneratorEngine Prestart Checks Onan-Powered Units Engine Prestart Checks Kohler-Powered UnitsFuel OilActivating The Dry Charge Battery If Applicable Do not overfill battery cellsRead and follow all instruc ChargerConnecting the Battery Installing Exhaust Pipe+ − Connect negative − cable lastConnecting to Weld Output Terminals Selecting Weld Cable Sizes45 m 60 m 70 m 90 m 105 m 120 m Put terminalsAmperage Selection Table For Stick Smaw Electrodes − Operating the Welding Generator Front Panel ControlsCeptacles, use − Operating Auxiliary EquipmentStandard Receptacles Optional Generator Power Receptacles Wiring Optional 240 Volt Plug− Maintenance ONAN-POWERED Units Every 1000 h Maintenance Label Onan-Powered UnitsEvery 500 h Servicing Air Cleaner Onan-Powered Units Stop engineOverload Protection Onan-Powered Units Servicing Optional Spark Arrestor Onan-Powered UnitsStop engine. Disconnect nega- tive − battery cable Stop engine and let coolFull Tools Needed Weld/Power Speed Adjustment Adjusting Engine Speed Onan-Powered UnitsIdle Speed Adjustment Every 25 h Routine Maintenance Kohler-Powered UnitsEvery 20 h Replace unreadable labels Maintenance Label Kohler-Powered Units Servicing Air Cleaner Kohler-Powered Units Overload Protection Kohler-Powered Units Servicing Optional Spark Arrestor Kohler-Powered Units802 339-B / S-0842 Adjusting Engine Speed Kohler-Powered Units Stop engine. Reinstall wrapper− Troubleshooting TroubleshootingGenerator Power WeldingEngine − Electrical Diagram Grounding Generator To Truck Or Trailer Frame − Generator Power GuidelinesSelecting Equipment Grounding When Supplying Building Systems How Much Power Does Equipment Require?Earth ground if supplying Amperes x Volts = WattsApproximate 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 x 1000 = Starting AmperageTypical Connections To Supply Standby Power Selecting Extension Cord Use Shortest Cord Possible Current Load Watts Amperes− Stick Welding Smaw Guidelines Stick Welding ProcedureWeld current starts when electrode touches work- piece Striking an Arc − Tapping Technique Electrode and Amperage Selection ChartStriking an Arc − Scratch Start Technique Positioning Electrode Holder Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Conditions That Affect Weld Bead Shape Electrode Movement During WeldingTee Joint Butt JointsLap Joint Troubleshooting − Porosity Troubleshooting − Excessive SpatterWeld Test Possible Causes Corrective ActionsTroubleshooting − Excessive Penetration Troubleshooting − Incomplete FusionTroubleshooting − Lack Of Penetration Troubleshooting − Distortion Troubleshooting − Burn-ThroughTroubleshooting − Waviness Of Bead OM-945 − Parts List Main Assembly Onan Engine ShownMain Assembly Panel, Front w/Components Panel, Front w/Components -1Item Generator -1Item Service SupportContact your Distributor for Hobart Welding Products