Hobart Welding Products H-10 GUN Troubleshooting − Excessive Spatter, Troubleshooting − Porosity

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9-8.

Troubleshooting − Excessive Spatter

 

 

Excessive Spatter − scattering of molten metal particles that

 

 

cool to solid form near weld bead.

 

 

S-0636

 

Possible Causes

Corrective Actions

Wire feed speed too high.

Select lower wire feed speed.

Voltage too high.

Select lower voltage range.

Electrode extension (stickout) too long.

Use shorter electrode extension (stickout).

Workpiece dirty.

Remove all grease, oil, moisture, rust, paint, undercoating, and dirt from work surface before welding.

Insufficient shielding gas at welding arc.

Increase flow of shielding gas at regulator/flowmeter and/or prevent drafts near welding arc.

Dirty welding wire.

Use clean, dry welding wire.

 

 

Eliminate pickup of oil or lubricant on welding wire from feeder or liner.

Incorrect polarity.

Check polarity required by welding wire, and change to correct polarity at welding power source.

9-9.

Troubleshooting − Porosity

 

 

Porosity − small cavities or holes resulting from gas pockets

 

 

in weld metal.

 

 

S-0635

 

Possible Causes

Corrective Actions

Insufficient shielding gas at welding arc.

Increase flow of shielding gas at regulator/flowmeter and/or prevent drafts near welding arc.

 

 

Remove spatter from gun nozzle.

 

 

Check gas hoses for leaks.

 

 

Place nozzle 1/4 to 1/2 in (6-13 mm) from workpiece.

 

 

Hold gun near bead at end of weld until molten metal solidifies.

Wrong gas.

Use welding grade shielding gas; change to different gas.

Dirty welding wire.

Use clean, dry welding wire.

 

 

Eliminate pick up of oil or lubricant on welding wire from feeder or liner.

Workpiece dirty.

Remove all grease, oil, moisture, rust, paint, coatings, and dirt from work surface before welding.

 

 

Use a more highly deoxidizing welding wire (contact supplier).

Welding wire extends too far out of nozzle.

Be sure welding wire extends not more than 1/2 in (13 mm) beyond nozzle.

9-10.

Troubleshooting − Excessive Penetration

 

 

Excessive Penetration − weld metal melting through base metal

 

 

and hanging underneath weld.

 

Excessive Penetration Good Penetration

 

 

S-0639

 

Possible Causes

Corrective Actions

Excessive heat input.

Select lower voltage range and reduce wire feed speed.

 

 

Increase travel speed.

OM-925 Page 36

 

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Contents Processes DescriptionFrom Hobart to You Table of Contents − Parts List Symbol Usage Marks a special safety messageArc Welding Hazards Electric Shock can killARC Rays can burn eyes and skin Welding can cause fire or explosionFlying Metal can injure eyes Buildup of GAS can injure or killCalifornia Proposition 65 Warnings EMF Information Principal Safety StandardsAbout Pacemakers Signification des symboles − Consignes DE Sécurité − À Lire Avant UtilisationLES Décharges Électriques peuvent être mortelles LES Fumées ET LES GAZ peuvent être dangereuxLE Soudage peut causer un incen- die ou une explosion LES Particules Projetées peu- vent blesser les yeuxLES Pièces Chaudes peuvent cau- ser des brûlures graves LE Bruit peut affecter l’ouïeRisque D’INCENDIE OU D’EXPLO LA Chute DE L’APPAREIL peut blesser’EMPLOI Excessif peut Faire LES Pièces Mobiles peuvent cau- ser des blessuresInformation sur les champs électromagnétiques Principales normes de sécuritéConsignes relatives aux stimulateurs cardiaques − Specifications Symbols And DefinitionsSpecifications − DefinitionsDuty Cycle And Overheating AmperesOutput Duty Cycle % VAC Model Output AmperesVoltage Volt-Ampere CurvesAmperage Installing Welding Gun − InstallationInstalling Work Clamp Process/Polarity Table Changing PolarityInstalling Gas Supply Special installation may be SectionDo not move or operate unit where it could tip Electrical Service Guide For 230 VAC Model Installing Wire Spool And Adjusting Hub TensionThreading Welding Wire Hold wire tightly to keep it From unraveling− Operation ControlsWeld Parameter Chart For 115 VAC Model 217 618-A Weld Parameter Chart For 230 VAC Model 217 754-B − Maintenance &TROUBLESHOOTING Routine MaintenanceOverload Protection Drive Motor ProtectionTurn Off power before replacing contact tip Changing Drive Roll Or Wire Inlet GuideReplacing Gun Contact Tip Disconnect gun from unit Cleaning Or Replacing Gun LinerTo Reassemble Gun Replacing Switch And/Or Head Tube Trouble Remedy Troubleshooting TableDoes not run − Electrical Diagram Circuit Diagram For 115 VAC ModelCircuit Diagram For 230 VAC Model − MIG Welding Gmaw Guidelines Typical MIG Process ConnectionsTypical MIG Process Control Settings Wire Size Amperage RangeThickness to Amperage a Select VoltageHolding And Positioning Welding Gun Conditions That Affect Weld Bead Shape Good Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Spatter Troubleshooting − PorosityTroubleshooting − Excessive Penetration Possible Causes Corrective ActionsTroubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Burn-Through Troubleshooting − Waviness Of Bead Troubleshooting − DistortionTroubleshooting Guide For Semiautomatic Welding Equipment Wire does not feedCommon MIG Shielding Gases ApplicationWelding arc not stable Wire slipping in drive rolls OM-925 − Parts List Main AssemblyDia Part Description Quantity Dia Part Description Quantity Mkgs H-10 Gun 195Optional Drive Rolls OptionsService SupportContact your Distributor for Hobart Welding Products
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