Hobart Welding Products OM-945 manual Weld Test, Troubleshooting − Porosity

Page 55

13-13. Weld Test

2 To 3 in

(51-76 mm)

1/4 in (6.4 mm)

3

 

 

3

 

2 To 3 in

 

(51-76 mm)

2

2

 

1

1

1Vise

2Weld Joint

3Hammer

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

S-0057-B

13-14. 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.

 

 

13-15. 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-945 Page 51

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Page 54 Page 56
Contents
Description ProcessesFrom Hobart to You Table of Contents Options and Accessories Warranty Arc Welding Hazards Symbol UsageEngine Hazards Compressed Air Hazards Radiation can cause interference Principal Safety StandardsCalifornia Proposition 65 Warnings EMF InformationLES Fumées ET LES GAZ peuvent être dangereux Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation UN Choc Électrique peut tuerLE Bruit peut affecter l’ouïe LE Soudage peut provoquer un in- cendie ou une explosionDES Particules Volantes peuvent blesser les yeux DES Pièces Chaudes peuvent provoquer des brûlures gravesLES Étincelles Volantes risquent de provoquer des blessures ’AIR Comprimé peut provoquer des blessures’EMPLOI Excessif peut LE Surchauffement peut endom- mager le moteur électriqueEn ce qui concerne les stimulateurs cardiaques LE Soudage À L’ARC risque de provoquer des interférencesPour les moteurs à essence Pour les moteurs diesel− Definitions − SpecificationsSymbol Definitions Weld, Power, and Engine SpecificationsGenerator Power Curve Dimensions, Weights, and Operating AnglesDuty Cycle Fuel Consumption All ModelsVolt-Ampere Curves Material Thickness Reference ChartMounting − InstallationInstalling Welding Generator Vehicle frame. Always connect a ground wireOil Engine Prestart Checks Robin-Powered UnitsEngine Prestart Checks Kohler-Powered Units FuelConnect negative − Activating The Dry Charge Battery If ApplicableConnecting the Battery Do not overfill battery cellsWeld Output Terminals Installing Exhaust PipeSelecting Weld Cable Sizes Connecting To Weld Output TerminalsFront Panel Controls − Operating the Welding GeneratorLoaded Cold Weather Engine OperationAmperage Selection Table For Stick Smaw Electrodes InfrequentlyStandard Receptacles − Operating Auxiliary EquipmentGfci Receptacle Option Optional Generator Power ReceptaclesReceptacle Current Available in Amperes 240Routine Maintenance Robin-Powered Units − Maintenance ROBIN-POWERED UnitsMaintenance Label Robin-Powered Units Servicing Air Cleaner Robin−Powered Units Stop engine and let cool Overload Protection Robin-Powered UnitsServicing Optional Spark Arrestor Robin-Powered Units Stop engine. Disconnect nega- tive − battery cableFull Tools Needed Idle Speed Adjustment Adjusting Engine Speed Robin-Powered UnitsWeld/Power Speed Adjustment Routine Maintenance Kohler-Powered Units − Maintenance − KOHLER-POWERED UnitsMaintenance Label Kohler-Powered Units Servicing Air Cleaner Kohler−Powered Units Servicing Optional Spark Arrestor Kohler-Powered Units Overload Protection Kohler-Powered Units802 339-G / S-0842 Stop engine. Reinstall wrapper Adjusting Engine Speed Kohler-Powered UnitsWelding − TroubleshootingTroubleshooting Generator PowerEngine Work like a Pro − Electrical Diagram Selecting Equipment − Generator Power GuidelinesGrounding Generator To Truck Or Trailer Frame Amperes x Volts = Watts Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Earth ground if supplyingFarm/Home Equipment Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Industrial Motors Rating Starting Watts Running WattsContractor Rating Starting Watts Running Watts Approximate Power Requirements For Contractor EquipmentKVA/HP x HP x 1000 = Starting Amperage Power Required To Start MotorHow Much Power Can Generator Supply? Single-Phase Induction Motor Starting RequirementsTypical Connections To Supply Standby Power Current Load Watts Amperes Selecting Extension Cord Use Shortest Cord PossibleWeld current starts when electrode touches work- piece Stick Welding Procedure− Stick Welding Smaw Guidelines Striking an Arc − Scratch Start Technique Electrode and Amperage Selection Chart Striking an Arc − Tapping Technique Good Weld Bead Characteristics Poor Weld Bead CharacteristicsPositioning Electrode Holder Electrode Movement During Welding Conditions That Affect Weld Bead ShapeLap Joint Butt JointsTee Joint Possible Causes Corrective Actions Troubleshooting − PorosityTroubleshooting − Excessive Spatter Weld TestTroubleshooting − Lack Of Penetration Troubleshooting − Incomplete FusionTroubleshooting − Excessive Penetration Troubleshooting − Waviness Of Bead Troubleshooting − Burn-ThroughTroubleshooting − Distortion Main Assembly Robin Engine Shown − Parts ListMain Assembly Panel, Front w/Components Panel, Front w/Components -1Item Generator -1Item Support ServiceAssistance Hobart Welding Products Contact your Distributor for
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