Hobart Welding Products OM-498 manual Weld Test, Troubleshooting Porosity

Page 50

11-13. Weld Test

 

3

 

 

 

3

2 To 3 in

 

 

(51-76 mm)

 

 

 

 

2 To 3 in

 

 

(51-76 mm)

1/4 in

2

2

 

(6.4 mm)

1

1

 

1Vise

2Weld Joint

3Hammer

Strike weld joint in direction shown. A good weld bends over but does not break.

S-0057-B

11-14. Troubleshooting – Porosity

Porosity – small cavities or holes resulting from gas pockets in weld metal.

Possible Causes

Corrective Actions

 

 

Arc length too long.

Reduce arc length.

 

 

Damp electrode.

Use dry electrode.

 

 

Workpiece dirty.

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

 

welding.

 

 

11-15. Troubleshooting – Excessive Spatter

Excessive Spatter – scattering of molten metal particles that cool to solid form near weld bead.

Possible Causes

Corrective Actions

 

 

Amperage too high for electrode.

Decrease amperage or select larger electrode.

Arc length too long or voltage too high.

Reduce arc length or voltage.

OM-498 Page 46

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Page 49 Page 51
Contents
Description OM-498Processes From Hobart to You Table of Contents Page Electric Shock can kill Symbol UsageArc Welding Hazards ARC Rays can burn eyes and skinEngine Hazards Engine Exhaust Gases can kill Battery Explosion can BlindMoving Parts can cause injury Engine Heat can cause fireRadiation can cause interference Principal Safety StandardsEMF Information ARC Welding can cause interferenceUN Choc É Lectrique peut tuer Signification des symbolesConsignes DE SÉ Curité Lire Avant Utilisation LES Fumé ES ET LES GAZ peuvent ê tre dangereuxDES PIÈ CES Chaudes peuvent provoquer des brû lures graves LE Soudage peut provoquer un in- cendie ou une explosionDES Particules Volantes peuvent blesser les yeux LE Bruit peut affecter l’ouïeLA Chaleur DU Moteur peut pro- voquer un incendie DES Organes Mobiles peuvent provoquer des blessures’EXPLOSION DE LA Batterie peut LA Chute DE L’APPAREIL peut blesserLE Soudage À L’ARC risque de provoquer des interfé rences Principales normes de sé curitéInformation sur les champs é lectromagné tiques Consignes relatives aux stimulateurs cardiaquesWeld, Power, And Engine Specifications SpecificationsSymbol Definitions DefinitionsDimensions Dimensions, Weights, And Operating AnglesFuel Consumption Kohler-Powered Units Weight Kohler-Powered UnitsDuty Cycle Fuel Consumption Honda-Powered UnitsExceeding duty cycle can damage unit and void warranty 100% Duty Cycle at 80 Amperes CC/DCAuxiliary Power Curve Volt-Ampere CurvesGrounding Generator To Truck Or Trailer Frame InstallationInstalling Welding Generator Grounding Generator When Supplying Building Systems Use ground device as stated in electrical codesOil Engine Prestart Checks Honda-Powered UnitsConnecting The Battery Honda Electric-Start Models Only Connect negative cable last45 m 60 m 70 m 90 m 105 m 120 m Connecting To Weld Output TerminalsSelecting Weld Cable Sizes Stop engine before60 Hz Controls Kohler-Powered UnitsOperating the Welding Generator Choke Control LeverControls Honda-Powered Units See Section Recoil-Start 2Electric-StartDescription Of Controls Honda-Powered Units See Section Circuit Breakers CB1 and CB2 Auxiliary Power Panel 196 921 CSAOperating Auxiliary Equipment Australia Europe Auxiliary Power Panel 196 Optional Auxiliary Power PanelsAuxiliary Power Panel 495 Auxiliary Power Panel 495 South America AsiaAuxiliary Power Panel Ratings It exceeds 3500WPlex receptacle shares a load with Plug Wired For 120/240Wire Load One half of the 240 V receptacleMaintenance Maintenance Label Overload Protection Honda-Powered Units OnlyTop View Idle Speed Adjustment Adjusting Engine Speed Kohler-Powered UnitsWeld/Power Speed Adjustment Stop engine. Close fuel valve Top ViewStop engine. Close fuel valve Adjusting Engine Speed Honda-Powered UnitsThrottle Control Lever Adjustment Screw Tools Needed 3/8Auxiliary Power TroubleshootingTroubleshooting WeldingEngine Check battery voltage Honda electric-start models onlyViscosity oil for operating temperature 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 EquipmentEarth ground if supplying Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Rating DataIndustrial Motors Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Farm/Home Equipment Rating Starting Watts Running WattsApproximate Power Requirements For Contractor Equipment Contractor Rating Starting Watts Running WattsSingle-Phase Induction Motor Starting Requirements Power Required To Start MotorHow Much Power Can Generator Supply? KVA/HP x HP xSafety practices Power Company ServiceObtain and install correct switch 120 Single-PhaseSelecting Extension Cord Use Shortest Cord Possible Current Load Watts AmperesStick Welding Smaw Guidelines Stick Welding ProcedureWeld current starts when electrode touches work- piece Striking an Arc Tapping Technique Electrode and Amperage Selection Chart Striking an Arc Scratch Start Technique Positioning Electrode Holder Poor Weld Bead CharacteristicsGood Weld Bead Characteristics 9090 End View of Work AngleConditions That Affect Weld Bead Shape Electrode Movement During WeldingTee Joint Butt JointsLap Joint 16 in 1.6 mm Tack WeldsWeld Test Troubleshooting PorosityTroubleshooting Excessive Spatter Possible Causes Corrective ActionsTroubleshooting Excessive Penetration Troubleshooting Incomplete FusionTroubleshooting Lack Of Penetration Troubleshooting Distortion Troubleshooting Burn-ThroughTroubleshooting Waviness Of Bead OM-498 Parts List 31-FigDia Part Europe America CanadaSouth Africa Australia Auxiliary Power Panel 495 289 Australia Auxiliary Power Panel 495 CanadaAuxiliary Power Panel 495 253 South Africa Auxiliary Power Panel 495 290 EuropeOM-498 Service SupportCall Contact your Distributor forHobart Welding Products
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