Hobart Welding Products OM-925 Troubleshooting − Waviness Of Bead, Troubleshooting − Distortion

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9-14. 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.

 

 

9-15. 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 OM-925217 694E 2008−10 Arc Welding Power Source Wire FeederProcesses DescriptionProtect Your Investment From Hobart to YouTable of Contents − ACCESSORIES/CONSUMABLES HOT Parts can cause severe burns 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 cause injury Welding Wire can cause injuryFire or Explosion hazard Falling Unit can cause injuryAbout Implanted Medical Devices Principal Safety StandardsCalifornia Proposition 65 Warnings EMF InformationUNE Décharge Électrique peut entraîner la mort Symboles utilisésIndique des instructions spécifiques LES Fumées ET LES GAZ peuvent être dangereux DES Pièces Chaudes peuvent provoquer des brûlures gravesLE Soudage peut provoquer un in cendie ou une explosion LA Chute DE L’APPAREIL peut blesser LE Bruit peut endommager l’ouïeLES Bouteilles peuvent exploser si elles sont endommagées Risque D’INCENDIE OU D’EXPLO- SionLES Fils DE Soudage peuvent provoquer des blessures Proposition californienne 65 AvertissementsLE Soudage À L’ARC risque de provoquer des interférences Information EMF Principales normes de sécuritéEn ce qui concerne les implants médicaux OM-925 − Definitions − SpecificationsSymbols And Definitions SpecificationsCan damage unit or gun and void WarrantyDuty Cycle And Overheating Output Duty Cycle %10.0 100 110 120 130 140 150 160 Volt-Ampere CurvesVoltage 15.0Be sure that gun end is tight against drive assembly − InstallationInstalling Welding Gun Installing Work ClampChanging Polarity Process/Polarity TableDo not use Argon/Mixed gas regulator/flowmeter Installing Gas SupplyFeedhead Pressure Assembly Open Feedhead Pressure Assembly ClosedDo not move or operate unit Where it could tip Selecting a Location And Connecting Input PowerAlign locking hole in spool with locking pin on spool hub Installing Wire Spool And Adjusting Hub TensionRetaining ring used with 8 in 203 mm spool only Turn off welding power source Installing Contact Tip And NozzleUse with solid or flux cored wire Hold wire tightly to keep it from unraveling Threading Welding WireLay gun cable out straight Desired drive roll pressure. Start With a setting of 2 or 3 on the scalePressure Indicator Scale Tighten− Operation Source or -2. Do not switch under loadControls Material Thickness Reference Chart Weld Parameter Chart 217 618-A Drive Motor Protection − Maintenance & TroubleshootingRoutine Maintenance Overload ProtectionStamped Stamped .030/.035 Changing Drive Roll Or Wire Inlet GuideTurn Off power before replacing contact tip Replacing Gun Contact TipDisconnect gun from unit Cleaning Or Replacing Gun LinerTo Reassemble Gun Replacing Switch And/Or Head Tube Trouble Remedy Troubleshooting TableCircuit Diagram − Electrical DiagramRegulator Flowmeter Wire Feeder Power Source Shielding Gas− MIG Welding Gmaw Guidelines Typical MIG Process Connections125 in = 125 a Typical MIG Process Control SettingsWire Size Amperage Range 001 in = 1 ampereGroove Welds Holding And Positioning Welding GunSlow Normal Fast Conditions That Affect Weld Bead ShapePush Perpendicular Drag Short Normal LongGood Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Possible Causes Corrective Actions Troubleshooting − Excessive SpatterTroubleshooting − Porosity Troubleshooting − Excessive PenetrationTroubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Burn-Through Direction Troubleshooting − Waviness Of BeadTroubleshooting − Distortion Base metal to moveCommon MIG Shielding Gases Troubleshooting Guide For Semiautomatic Welding EquipmentApplication Drive rolls if necessary Welding arc not stable Wire slipping in drive rollsReadjust welding parameters Welding power sourceConsumables − ACCESSORIES/CONSUMABLESAccessories Replacement Drive RollsSupport ServiceAssistance Hobart Welding Products Contact your Distributor for
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