Hobart Welding Products 187 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.

OM-228 187 Page 39

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Contents 2010−01 OM-228 187BProcesses DescriptionProtect Your Investment From Hobart to YouTable of Contents − Parts List HOT 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 InformationUNE Décharge Électrique peut entraîner la mort Symboles utilisésLES Fumées ET LES GAZ peuvent être dangereux LES Pièces Chaudes peuvent provoquer des brûluresLE 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 blessuresInformations relatives aux CEM Principales normes de sécuritéEn ce qui concerne les implants médicaux OM-228 187 − Definitions − SpecificationsSymbols And Definitions SpecificationsOutput Duty Cycle And OverheatingVolt-Ampere Curves AmperesInstalling Nozzle, Contact Tip, And Adapter − InstallationInstalling Welding Gun Installing Work Clamp Process/Polarity Table Turn off welding power sourceChanging Polarity Installing Gas Supply Selecting a Location And Connecting Input Power Installing Wire Spool And Adjusting Hub Tension Electrical Service GuideHold wire tightly to keep it from unraveling Threading Welding WireControls − OperationOM-228 187 CFH Weld Parameter Chart227010 Drive Motor Protection − Maintenance & TroubleshootingRoutine Maintenance Overload ProtectionChanging Drive Roll Or Wire Inlet Guide Thread wire according to Replacing Switch And/Or Head Tube Trouble Remedy Troubleshooting TableOM-228 187 Circuit Diagram − Electrical Diagram228 180-A Typical MIG Process Connections − MIG Welding Gmaw GuidelinesWire Size Amperage Range Typical MIG Process Control SettingsSelect Voltage Groove Welds Holding And Positioning Welding GunConditions That Affect Weld Bead Shape Good Weld Bead Characteristics Poor Weld Bead Characteristics Gun Movement During Welding Possible Causes Corrective Actions Troubleshooting − Excessive SpatterTroubleshooting − Porosity Troubleshooting − Excessive PenetrationTroubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Burn-Through Troubleshooting − Distortion Troubleshooting − Waviness Of BeadCommon MIG Shielding Gases Troubleshooting Guide For Semiautomatic Welding EquipmentApplication Welding arc not stable Wire slipping in drive rolls Main Assembly − Parts ListDia Part Description Quantity 228 245 H100S2-10 GunOptions Optional Drive RollsSupport ServiceAssistance Hobart Welding Products Contact your Distributor for