Hobart 125 EZ, H-9B manual Troubleshooting − Excessive Spatter, Troubleshooting − Porosity

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8-8.	Troubleshooting − Excessive Spatter
		Excessive Spatter − scattering of molten metal particles that
		cool to solid form near weld bead.
		S-0636
	Possible Causes	Corrective Actions
Metal Thickness Selector switch set too		Set Metal Thickness Selector switch to a lower selection.
high.
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.
Dirty welding wire.		Use clean, dry welding wire.
		Eliminate pickup of oil or lubricant on welding wire from feeder or liner.

8-9. Troubleshooting − Porosity

	Porosity − small cavities or holes resulting from gas pockets
	in weld metal.
	S-0635
Possible Causes	Corrective Actions
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.
8-10. 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.	Set Metal Thickness Selector switch to a lower selection.
	Increase travel speed.

OM-923 Page 31

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Contents File Flux Cored Fcaw OM-923Processes DescriptionFrom Hobart to You Table of Contents Warranty Electric Shock can kill Symbol UsageMarks a special safety message Arc Welding HazardsBuildup of GAS can injure or kill ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal can injure eyesCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information Indique un message de sécurité particulier UNE Décharge Électrique peut entraîner la mortLES Fumées ET LES GAZ peuvent être dangereux DES Pièces Chaudes peuvent provoquer des brûlures graves LE Soudage peut provoquer unIncendie ou une explosion DES Particules Volantes peuvent blesser les yeuxDES Organes Mobiles peuvent provoquer des blessures Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser ’EMPLOI Excessif peut SUREn ce qui concerne les stimulateurs cardiaques Principales normes de sécuritéDuty Cycle And Overheating − SpecificationsSpecifications Volt-Ampere Curves Polarity − InstallationInstalling Work Clamp Process/Polarity TableInstalling 4 in 102 mm Wire Spool Installing Wire Spool And Adjusting Hub TensionDo not move or operate unit where it could tip Turn off welding power source Installing Contact Tip And NozzleInput Power Threading Welding WireControls − OperationOperating The Gun Drive Motor Protection − Maintenance &TROUBLESHOOTINGRoutine Maintenance Overload ProtectionSlide replacement wire guide into Changing Drive Roll Or Wire Inlet GuideReplacing Gun Contact Tip Cleaning Gun Liner Replacing Gun Liner End of wire at spool13/16 in 21 mm Does not run Troubleshooting TableTrouble Remedy Circuit Diagram − Electrical DiagramTypical Fcaw Process Connections − Wire Welding GuidelinesAmperage Typical Control SettingsWire Size Amperage Range Thickness to Amperage aHolding And Positioning Welding Gun Conditions That Affect Weld Bead Shape Gun Movement During Welding Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Possible Causes Corrective Actions Troubleshooting − Excessive SpatterTroubleshooting − Porosity Troubleshooting − Excessive PenetrationTroubleshooting − Burn-Through Troubleshooting − Lack Of PenetrationTroubleshooting − Incomplete Fusion Wire does not feed Troubleshooting − Waviness Of BeadTroubleshooting − Distortion Troubleshooting Guide For Semiautomatic Welding EquipmentMain Assembly − Parts ListDia Part Description Quantity Pkg 225209 Wire Drive AssemblyPage Assistance ServiceSupport Hobart Welding Products Contact your Distributor for