Hobart Welding Products 217 694E Gun Movement During Welding, Poor Weld Bead Characteristics

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9-5. Gun Movement During Welding

.Normally, a single stringer bead is satisfactory for most narrow groove weld joints; however, for wide groove weld joints or bridging across gaps, a weave bead or multiple stringer beads works better.

1Stringer Bead − Steady Movement Along Seam

1

2

2

Weave Bead − Side To Side

 

 

 

Movement Along Seam

 

 

3

Weave Patterns

 

 

Use weave patterns to cover a wide

 

 

area in one pass of the electrode.

 

3

 

 

 

 

S-0054-A

9-6. Poor Weld Bead Characteristics

 

 

 

1

Large Spatter Deposits

1

2

Rough, Uneven Bead

3

Slight Crater During Welding

 

 

4

Bad Overlap

 

5

Poor Penetration

2

3

4

5

S-0053-A

9-7. Good Weld Bead Characteristics

 

 

 

1

Fine Spatter

 

 

 

2

Uniform Bead

 

 

1

3

Moderate Crater During

 

 

 

 

Welding

 

 

 

Weld a new bead or layer for each

 

 

 

1/8 in (3.2 mm) thickness in metals

 

 

 

being welded.

 

 

 

4

No Overlap

 

 

 

5

Good Penetration into Base

2

3

4

 

Metal

 

 

5

S-0052-B

OM-925 Page 36

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Contents Arc Welding Power Source Wire Feeder ProcessesDescription OM-925217 694E 2008−10From Hobart to You Protect Your InvestmentTable of Contents − ACCESSORIES/CONSUMABLES Symbol Usage Arc Welding HazardsElectric Shock can kill HOT Parts can cause severe burnsFumes and Gases can be hazardous ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal or Dirt can injure eyesWelding Wire can cause injury Fire or Explosion hazardFalling Unit can cause injury Moving Parts can cause injuryPrincipal Safety Standards California Proposition 65 WarningsEMF Information About Implanted Medical DevicesUNE 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 LE Bruit peut endommager l’ouïe LES Bouteilles peuvent exploser si elles sont endommagéesRisque D’INCENDIE OU D’EXPLO- Sion LA Chute DE L’APPAREIL peut blesserLES 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 − Specifications Symbols And DefinitionsSpecifications − DefinitionsWarranty Duty Cycle And OverheatingOutput Duty Cycle % Can damage unit or gun and voidVolt-Ampere Curves Voltage15.0 10.0 100 110 120 130 140 150 160− Installation Installing Welding GunInstalling Work Clamp Be sure that gun end is tight against drive assemblyProcess/Polarity Table Changing PolarityInstalling Gas Supply Feedhead Pressure Assembly OpenFeedhead Pressure Assembly Closed Do not use Argon/Mixed gas regulator/flowmeterSelecting a Location And Connecting Input Power Do not move or operate unit Where it could tipAlign 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 With a setting of 2 or 3 on the scale Pressure Indicator ScaleTighten Desired drive roll pressure. Start− Operation Source or -2. Do not switch under loadControls Material Thickness Reference Chart Weld Parameter Chart 217 618-A − Maintenance & Troubleshooting Routine MaintenanceOverload Protection Drive Motor ProtectionChanging Drive Roll Or Wire Inlet Guide Turn Off power before replacing contact tipReplacing Gun Contact Tip Stamped Stamped .030/.035Disconnect gun from unit Cleaning Or Replacing Gun LinerTo Reassemble Gun Replacing Switch And/Or Head Tube Troubleshooting Table Trouble Remedy− Electrical Diagram Circuit DiagramWire Feeder Power Source Shielding Gas − MIG Welding Gmaw GuidelinesTypical MIG Process Connections Regulator FlowmeterTypical MIG Process Control Settings Wire Size Amperage Range001 in = 1 ampere 125 in = 125 aHolding And Positioning Welding Gun Groove WeldsConditions That Affect Weld Bead Shape Push Perpendicular DragShort Normal Long Slow Normal FastGood Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Spatter Troubleshooting − PorosityTroubleshooting − Excessive Penetration Possible Causes Corrective ActionsTroubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Burn-Through Troubleshooting − Waviness Of Bead Troubleshooting − DistortionBase metal to move DirectionCommon MIG Shielding Gases Troubleshooting Guide For Semiautomatic Welding EquipmentApplication Welding arc not stable Wire slipping in drive rolls Readjust welding parametersWelding power source Drive rolls if necessary− ACCESSORIES/CONSUMABLES AccessoriesReplacement Drive Rolls ConsumablesSupport ServiceAssistance Contact your Distributor for Hobart Welding Products