Craftsman 117.205710 Troubleshooting Excessive Spatter, Troubleshooting Porosity, Possible Causes

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6-8.

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.

6-9.

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.

6-10. 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.

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Contents MIG Welder Owner’s Record Table of Contents Symbol Usage Marks a special safety messageArc Welding Hazards OM-194 199ARC Rays can burn eyes and skin Principal Safety Standards Fire or Explosion hazardEMF Information About PacemakersSpecifications InstallationVolt-Ampere Curves Welding Power Source Duty Cycle And Overheating Exceeding duty cycle can damage unit and void warrantyWelding Gun Duty Cycle And Overheating OverheatingInstalling Work Clamp Installing Gas SupplyInstalling Welding Gun Setting Gun PolarityPolarity Changeover Label Tools Needed 11/16Installing Wire Spool And Adjusting Hub Tension Turn Off unit, and disconnect input powerReinstall wrapper Tools Needed 7/16 Changing Input VoltageElectrical Service Guide Selecting a Location And Connecting Input PowerInput Voltage Min Grounding Conductor Size In AWG/KcmilThreading Welding Wire Weld Parameter 12 ga 14 ga 16 ga 18 ga 20 ga 22 gaWire Type Aluminum Weld Parameter For Use With Optional Spool GunShielding Gas Diameter 9.5 mmFront Panel Controls OperationControls For Standard Units Routine Maintenance Maintenance & TroubleshootingMonths Cleaning Or Replacing Gun Liner Disconnect gun firstHead Tube Remove nozzle, contact tip, and adapter Blow out gun casing Remove linerReplacing Switch And/Or Head Tube Remove handle locking nut Slide handleReplacing Gun Contact Tip TroubleshootingSee Section Electrical Diagram Circuit DiagramWire Feeder Power Source Gun Work Clamp Workpiece MIG Welding Gmaw GuidelinesTypical MIG Process Connections Shielding Gas Regulator/ FlowmeterTypical MIG Process Control Settings Wire Recommendation Wire SpeedSelect Wire Size Based on 1/8 in material thickness Ipm = inch per minuteHolding And Positioning Welding Gun Conditions That Affect Weld Bead Shape Push PerpendicularDragShort Normal Long ShortNormalLongGood 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 Distortion Troubleshooting Waviness Of BeadWeld bead Application Common MIG Shielding GasesFlat & Horizontal1 Fillet Parts LIST-Welder Model No Parts List-Welder Model No Center Baffle w/Components 083 M-15 Gun -1 Item Includes Items 23 15OM-194 199 Efectiva 1 enero OM-194 199 PáginaIndice Peligros en Soldadura de Arco Uso de SímbolosAnota un mensaje especial de seguridad LOS Rayos DEL Arco pueden que- mar sus ojos y piel Está ndares Principales de Seguridad Peligro de Fuego O ExplosionInformació n del EMF Acerca de Marcadores de PasoEspecificaciones Seccion 9 InstalacionCurvas Voltio-Amperio Sobrecalentando Ciclo de trabajo de la antorcha y el sobrecalentamientoDefinició n Instalando la Grampa de Trabajo Instalando el Gas ProtectivoInstalando la Pistola Fijando la Polaridad de la Pistola Herramientas Necesarias 11/16 pulg OM-194 199 PáginaCambiando el Voltaje de Entrada No mueva o opere la unidad donde podría voltearse 11. Guía de Servicio Elé ctricoLo 511 o CEC Secció n Pulg 150 mm Abra el ensamblaje de presión Enhilando el Alambre de SoldaduraApriete Pará metro de Soldadura Tipo de Diá metroDel Flujo100% Argón Tipo de Alambre Diá metro del Grosor del Material100 OM-194 199 Página Seccion 10 Operacion Controles del Panel FrontalControles para las Unidades Es- tá ndar Control de Alimentación de AlambreSeccion 11 Mantenimiento Y Correccion DE Averias Mantenció n Rutinario11-2. Bré iquers CB1 y CB2 Instalando los Rodillo de Alimentació n y Guía de AlambreSeccion 12 Diagramas Electricos Seccion 13 Directivas Para Soldadura MIG Gmaw Conexiones Típicas para el Proceso MIGFijaciones de Control para un Proceso de MIG Típico Gama de AmperajeAlambre Seleccione el Tamañ o del AlambreComo Sostener y Posicionar la Pistola de Soldar Condiciones que Afectan la Forma del Cordó n de Suelda EmpujePerpendicular Arrastre Corto NormalCaracterísticas Malas de un Cordó n de Soldadura Movimiento de la Pistola durante la SueldaCaracterísticas Buenas de un Cordó n de Soldadura Soluciones a Problemas de Soldadura Porosidad Soluciones a Problemas de Soldadura Excesiva SalpicaduraCausas Posibles Acció n Correctiva Soluciones a Problemas de Soldadura Falta de Penetració n Soluciones a Problemas de Soldadura Penetració n ExcesivaSoluciones a Problemas de Soldadura Fusió n Incompleta Soluciones a Problemas de Soldadura Hacer Hueco Soluciones a Problemas de Soldadura Distorció nNo cubre la unión formada por el material base Causas PosiblesGases Má s Comunes para Protecció n de Soldadura MIG Aplicació nArgó n + 25% CO HorizontalesApuntes OM-194 199 Página
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