Hobart Welding Products 217 694E MIG Welding Gmaw Guidelines, Typical MIG Process Connections

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SECTION 9 − MIG WELDING (GMAW) GUIDELINES

9-1. Typical MIG Process Connections

Regulator/

Flowmeter

Weld current can damage electronic parts in vehicles. Disconnect both battery cables before welding on a vehicle. Place work clamp as close to the weld as possible.

Wire Feeder/

Power Source

Shielding Gas	Gas Hose

Gun

Work Clamp Workpiece

light mig 5/97 / Ref. 803 715-A

OM-925 Page 32

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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 DevicesSymboles utilisés UNE Décharge Électrique peut entraîner la mortIndique des instructions spécifiques DES Pièces Chaudes peuvent provoquer des brûlures graves LES Fumées ET LES GAZ peuvent être dangereuxLE 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 blesserProposition californienne 65 Avertissements LES Fils DE Soudage peuvent provoquer des blessuresLE Soudage À L’ARC risque de provoquer des interférences Principales normes de sécurité Information EMFEn 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 tipInstalling Wire Spool And Adjusting Hub Tension Align locking hole in spool with locking pin on spool hubRetaining ring used with 8 in 203 mm spool only Installing Contact Tip And Nozzle Turn off welding power sourceUse with solid or flux cored wire Threading Welding Wire Hold wire tightly to keep it from unravelingLay gun cable out straight With a setting of 2 or 3 on the scale Pressure Indicator ScaleTighten Desired drive roll pressure. StartSource or -2. Do not switch under load − OperationControls 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/.035Cleaning Or Replacing Gun Liner Disconnect gun from unitTo 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 FastPoor Weld Bead Characteristics Good Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Spatter Troubleshooting − PorosityTroubleshooting − Excessive Penetration Possible Causes Corrective ActionsTroubleshooting − Lack Of Penetration Troubleshooting − Incomplete FusionTroubleshooting − Burn-Through Troubleshooting − Waviness Of Bead Troubleshooting − DistortionBase metal to move DirectionTroubleshooting Guide For Semiautomatic Welding Equipment Common MIG Shielding GasesApplication Welding arc not stable Wire slipping in drive rolls Readjust welding parametersWelding power source Drive rolls if necessary− ACCESSORIES/CONSUMABLES AccessoriesReplacement Drive Rolls ConsumablesService SupportAssistance Contact your Distributor for Hobart Welding Products