Hobart Welding Products 125 Troubleshooting − Burn-Through, Troubleshooting − Waviness Of Bead

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9-14. Troubleshooting − Burn-Through

Burn-Through − weld metal melting completely through base metal resulting in holes where no metal remains.

S-0640

Possible Causes	Corrective Actions

Excessive heat input.	Select lower voltage range and reduce wire feed speed.

	Increase and/or maintain steady travel speed.

9-15. Troubleshooting − Waviness Of Bead

Waviness Of Bead − weld metal that is not parallel and does not cover joint formed by base metal.

S-0641

Possible Causes	Corrective Actions

Welding wire extends too far out of nozzle.	Be sure welding wire extends not more than 1/2 in. (13 mm) beyond nozzle.

Unsteady hand.	Support hand on solid surface or use two hands.

9-16. Troubleshooting − Distortion

					Distortion − contraction of weld metal during welding that forces
					base metal to move.
				Base metal moves


				in the direction of
				the weld bead.
					S-0642

	Possible Causes				Corrective Actions

Excessive heat input.					Use restraint (clamp) to hold base metal in position.

					Make tack welds along joint before starting welding operation.

					Select lower voltage range and/or reduce wire feed speed.

					Increase travel speed.

					Weld in small segments and allow cooling between welds.

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Contents File Flux Cored Fcaw ProcessesDescription Protect Your Investment From Hobart to YouTable of Contents 10-2 10-1Arc Welding Hazards Symbol UsageElectric Shock can kill HOT Parts can burnARC Rays can burn eyes and skin Fumes and Gases can be hazardousWelding can cause fire or explosion Flying Metal or Dirt can injure eyesFire or Explosion hazard Welding Wire can injureFalling Equipment can injure Moving Parts can injureCalifornia Proposition 65 Warnings Principal Safety StandardsEMF Information About Implanted Medical DevicesIndique des instructions spécifiques Symboles utilisésUNE Décharge Électrique peut entraîner la mort LE Soudage peut provoquer un incendie ou une explosion LES Pièces Chaudes peuvent provoquer des brûluresLES Fumées ET LES GAZ peuvent être dangereux LES Bouteilles peuvent exploser si elles sont endommagées LE Bruit peut endommager l’ouïeRisque D’INCENDIE OU LA Chute DE L’ÉQUIPEMENT peut provoquer des blessuresLes Pièces Mobiles peuvent causer des blessures Proposition californienne 65 AvertissementsLES Fils DE Soudage peuvent provoquer des blessures LE Soudage À L’ARC risque de provoquer des interférencesEn ce qui concerne les implants médicaux Principales normes de sécuritéInformations relatives aux CEM OM-947 Symbols And Definitions − SpecificationsSpecifications − DefinitionsDuty Cycle And Overheating WarrantyVolt-Ampere Curves Can damage unit or gun and voidSlide insulating grips over handles Tools Needed OM-947 − InstallationInstalling Work Clamp Changing Polarity Process/Polarity TableTools Needed 11/16, 1-1/8 Shielding Gas Installing Gas SupplyOptional hub kit Installing Wire Spool And Adjusting Hub TensionOnly applies to units equipped with Make this installation Selecting a Location And Connecting 115 Volt Input PowerSerial Number And Rating Label Location SectionTurn off welding power source Installing Contact Tip And NozzleHold wire tightly to keep it from unraveling Threading Welding WireControls − OperationOperating The Gun LoadWeld Parameter Chart Routine Maintenance − Maintenance &TROUBLESHOOTINGOverload Protection Drive Motor ProtectionRetaining Knob Opening Changing Drive Roll Or Wire Inlet GuideReplacing Gun Contact Tip Turn Off power before replacing contact tipHold wire tightly to keep it Cleaning Gun LinerThread wire according to From unraveling. SecureReplacing Gun Liner Remove black sleeving from end of replacement linerTools Needed Head Tube Mm / 10 mm Tube. Separate gun handle halves10 mm Secure power cord plug in receptacle see Section Troubleshooting TablePower source see Section Trouble RemedyCircuit Diagram − Electrical DiagramTypical Gmaw MIG Process Connections − FCAW/GMAW Welding GuidelinesTypical Fcaw Process Connections Wire Size Amperage Range Typical Control SettingsAmperage Select VoltageEnd View of Work Angle Holding And Positioning Welding GunSlow Normal Conditions That Affect Weld Bead ShapeShort Normal Long Gun Movement During Welding Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Possible Causes Corrective Actions Troubleshooting − Excessive SpatterTroubleshooting − Porosity Troubleshooting − Incomplete Fusion Troubleshooting − Excessive PenetrationTroubleshooting − Lack Of Penetration Troubleshooting − Waviness Of Bead Troubleshooting − Burn-ThroughTroubleshooting − Distortion Base metal to moveCommon Gmaw MIG Shielding Gases Troubleshooting Guide For Semiautomatic Welding EquipmentApplication FilletOpen gas valve at cylinder and adjust flow rate Gas nozzle plugged Clean or replace gas nozzleGas hose in gun and cable assembly Loose or broken wires to gas solenoidAccessories − ACCESSORIES/CONSUMABLESConsumables PkgMaterial Thickness Reference Chart Work like a Pro Assistance ServiceSupport Hobart Welding Products Contact your Distributor for