Hobart Welding Products 125 manual Troubleshooting − Excessive Spatter, Troubleshooting − Porosity

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9-9.	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.

9-10. 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.
(GMAW).
	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 (GMAW).	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.

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Contents Processes DescriptionFile Flux Cored Fcaw Protect Your Investment From Hobart to YouTable of Contents 10-2 10-1HOT Parts can burn Symbol UsageArc Welding Hazards Electric Shock can killFlying Metal or Dirt can injure eyes Fumes and Gases can be hazardousARC Rays can burn eyes and skin Welding can cause fire or explosionMoving Parts can injure Welding Wire can injureFire or Explosion hazard Falling Equipment can injureAbout Implanted Medical Devices Principal Safety StandardsCalifornia Proposition 65 Warnings EMF InformationSymboles utilisés UNE Décharge Électrique peut entraîner la mortIndique des instructions spécifiques LES Pièces Chaudes peuvent provoquer des brûlures LES Fumées ET LES GAZ peuvent être dangereuxLE Soudage peut provoquer un incendie ou une explosion LA Chute DE L’ÉQUIPEMENT peut provoquer des blessures LE Bruit peut endommager l’ouïeLES Bouteilles peuvent exploser si elles sont endommagées Risque D’INCENDIE OULE Soudage À L’ARC risque de provoquer des interférences Proposition californienne 65 AvertissementsLes Pièces Mobiles peuvent causer des blessures LES Fils DE Soudage peuvent provoquer des blessuresPrincipales normes de sécurité Informations relatives aux CEMEn ce qui concerne les implants médicaux OM-947 − Definitions − SpecificationsSymbols And Definitions SpecificationsCan damage unit or gun and void WarrantyDuty Cycle And Overheating Volt-Ampere Curves− Installation Installing Work ClampSlide insulating grips over handles Tools Needed OM-947 Changing Polarity Process/Polarity TableTools Needed 11/16, 1-1/8 Shielding Gas Installing Gas SupplyInstalling Wire Spool And Adjusting Hub Tension Only applies to units equipped withOptional hub kit Section Selecting a Location And Connecting 115 Volt Input PowerMake this installation Serial Number And Rating Label LocationTurn off welding power source Installing Contact Tip And NozzleHold wire tightly to keep it from unraveling Threading Welding WireLoad − OperationControls Operating The GunWeld Parameter Chart Drive Motor Protection − Maintenance &TROUBLESHOOTINGRoutine Maintenance Overload ProtectionRetaining Knob Opening Changing Drive Roll Or Wire Inlet GuideReplacing Gun Contact Tip Turn Off power before replacing contact tipFrom unraveling. Secure Cleaning Gun LinerHold wire tightly to keep it Thread wire according toTube. Separate gun handle halves Remove black sleeving from end of replacement linerReplacing Gun Liner Tools Needed Head Tube Mm / 10 mm10 mm Trouble Remedy Troubleshooting TableSecure power cord plug in receptacle see Section Power source see SectionCircuit Diagram − Electrical Diagram− FCAW/GMAW Welding Guidelines Typical Fcaw Process ConnectionsTypical Gmaw MIG Process Connections Select Voltage Typical Control SettingsWire Size Amperage Range AmperageEnd View of Work Angle Holding And Positioning Welding GunConditions That Affect Weld Bead Shape Short Normal LongSlow Normal Poor Weld Bead Characteristics Good Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Spatter Troubleshooting − PorosityPossible Causes Corrective Actions Troubleshooting − Excessive Penetration Troubleshooting − Lack Of PenetrationTroubleshooting − Incomplete Fusion Base metal to move Troubleshooting − Burn-ThroughTroubleshooting − Waviness Of Bead Troubleshooting − DistortionFillet Troubleshooting Guide For Semiautomatic Welding EquipmentCommon Gmaw MIG Shielding Gases ApplicationLoose or broken wires to gas solenoid Gas nozzle plugged Clean or replace gas nozzleOpen gas valve at cylinder and adjust flow rate Gas hose in gun and cable assemblyPkg − ACCESSORIES/CONSUMABLESAccessories ConsumablesMaterial Thickness Reference Chart Work like a Pro Service SupportAssistance Hobart Welding Products Contact your Distributor for