Hobart Welding Products OM-240 438E manual Conditions That Affect Weld Bead Shape, Electrode Angle

Page 58

13-7. Conditions That Affect Weld Bead Shape

. Weld bead shape is affected by electrode angle, arc length, travel speed, and thick- ness of base metal.

 

Correct Angle

 

Angle Too Small

10° - 30°

Angle Too Large

Electrode Angle

Drag

Spatter

Arc Length

 

 

Too Short

Normal

Too Long

Travel Speed

 

 

Slow

Normal

Fast

S-0061

13-8. Electrode 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

1

 

2

stringer beads work better.

 

1 Stringer Bead − Steady

 

 

 

 

 

 

 

 

Movement Along Seam

 

 

 

 

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 elec-

 

 

 

trode. Do not let weave width

ex-

 

3

 

ceed 2-1/2 times diameter

of

 

 

electrode.

 

 

 

 

 

S-0054-A

OM-240 438 Page 54

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Page 57 Page 59
Contents Processes OM-240 438EDescription From Hobart to You Protect Your InvestmentTable of Contents 10-1 Electric Shock can kill Symbol UsageArc Welding Hazards HOT Parts can burnARC Rays can burn eyes and skin Fumes and Gases can be hazardousBuildup of GAS can injure or kill Welding can cause fire or explosionEngine Hazards Hydraulic Equipment can injure or kill Hydraulic HazardsCompressed Air Hazards Hydraulic Fluid can injure or killOverheating can damage motors Compressed AIR can injure or killFire or Explosion hazard Falling Equipment can injureCalifornia Proposition 65 Warnings EMF Information Principal Safety StandardsAbout Implanted Medical Devices UN Choc Électrique peut tuer Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation Indique des instructions spécifiquesLE Soudage peut provoquer un incendie ou une explosion LES Pièces Chaudes peuvent provoquer des brûluresLES Fumées ET LES GAZ peu- vent être dangereux LE Bruit peut affecter l’ouïe’EXPLOSION DE LA Batterie peut provoquer des blessures Les Pièces Mobiles peuvent causer des blessuresLES Étincelles À L’ÉCHAPPEMENT peuvent provoquer un incendie LA Chaleur DU Moteur peut pro- voquer un incendieLire LES Instructions LE Surchauffement peut endommager le moteur électrique Risque D’INCENDIE OULA Chute DE L’ÉQUIPEMENT peut provoquer des blessures LES Étincelles Projetées peuvent provoquer des blessuresUNE Remorque QUI Bascule peut provoquer des blessures Proposition californienne 65 AvertissementsLE Soudage À L’ARC risque de provoquer des interférences Informations relatives aux CEM Principales normes de sécuritéEn ce qui concerne les implants médicaux Weld, Power, and Engine Specifications − SpecificationsSymbol Definitions − DefinitionsDimensions, Weights, And Operating Angles Weight 562 lb 254 kgDuty Cycle Dimensions For Units With Optional Running GearDimensions Duty CycleFor CC/DC Mode For CC/AC ModeVolt-Ampere Curves Generator Power Curve Fuel ConsumptionSerial Number And Rating Label Location − InstallationInstalling Welding Generator Movement Location / Airflow ClearanceGrounding Generator To Truck Or Trailer Frame GND/PEEngine Prestart Checks OilConnect negative − battery cable last Installing Exhaust PipeConnecting Or Replacing the Battery + −Stop engine Failure to properly connect Connecting To Weld Output TerminalsTools Needed 3/4 350 ft 400 ft 45 m 60 m 70 m 90 m 105 m 120 m Selecting Weld Cable Sizes150 ft 200 ft 250 ft 100 150 200 250Start Your Professional Welding Career Now Front Panel Controls Engine Control Switch− Operating the Welding Generator Fine ControlLoaded Cold Weather Engine OperationInfrequently Frequently LoadedStop engine Typical Stick Welding Connections And Control SettingsElectrode Gfci Receptacle Option − Operating Auxiliary EquipmentStandard Receptacles At least once a month, run engine atCurrent Available in Amperes 240 Simultaneous Weld And PowerWiring Optional 240 Volt Plug Receptacle− Maintenance Maintenance Label200 Routine Maintenance100 500Servicing Air Cleaner Close valve and valve cap Changing Engine Oil, Oil Filter, and Fuel FilterStop engine and let cool Before Adding Oil Running engineWeld/Power Speed Adjustment Adjusting Engine SpeedIdle Speed Adjustment Turn idle speed screw for fine ad- justmentsServicing Optional Spark Arrestor Stop engine. Disconnect negative − battery cableOverload Protection Fuse F1 See SectionGenerator Power Troubleshooting − TroubleshootingWelding Troubleshooting Trouble RemedyErs SR2 and SR3 Engine TroubleshootingCheck receptacle wiring and connections Check fuel levelRecommended Spare Parts − Parts ListControl switch S2, and throttle solenoid TS1 Recommended Spare Parts− Electrical Diagrams Circuit Diagram For Welding Generator240 424-B − Generator Power Guidelines Selecting EquipmentUse ground device as stated Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Electrical codesIndustrial Motors Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Farm/Home Equipment Rating Starting Watts Running WattsApproximate Power Requirements For Contractor Equipment Contractor Rating Starting Watts Running WattsSingle-Phase Induction Motor Starting Requirements Power Required To Start MotorHow Much Power Can Generator Supply? KVA/HP x HP x 1000 / Volts = Starting AmperageTypical Connections To Supply Standby Power Selecting Extension Cord Use Shortest Cord Possible Weld current starts when Stick Welding Procedure− Stick Welding Smaw Guidelines Electrode touches workScratch Technique Electrode and Amperage Selection ChartStriking an Arc Tapping TechniquePositioning Electrode Holder Poor Weld Bead CharacteristicsGood Weld Bead Characteristics End View Of Work Angle Side View Of Electrode Angle 10-30Electrode Angle Conditions That Affect Weld Bead ShapeElectrode Movement During Welding NormalTee Joint Groove Butt JointsLap Joint Or LessPossible Causes Corrective Actions TroubleshootingWeld Test Weld beadMetal remains Lack of Penetration Good PenetrationGood Penetration Excessive Penetration DirectionSOCKET/WRENCH Selection Table Standard Metric Support ServiceAssistance Contact your Distributor for Hobart Welding Products
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