MIG Welding Gmaw Guidelines | Hobart Welding Products 140 guide

SECTION 9 − MIG WELDING (GMAW) GUIDELINES

9-1. Typical MIG Process Connections

Y 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.

Regulator/

Flowmeter

Shielding Gas

Wire Feeder/

Power Source

Gas Hose

Gun

Work Clamp Workpiece

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

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Hobart Welding Products 140 manual MIG Welding Gmaw Guidelines, Typical MIG Process Connections

Contents

Processes OM-925Description From Hobart to You Table of Contents − MIG Welding Gmaw Guidelines − ACCESSORIES/CONSUMABLESTypical MIG Process Connections Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can kill Flying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or kill California Proposition 65 Warnings EMF Information Principal Safety StandardsAbout Pacemakers LES Fumées ET LES GAZ peuvent être dangereux UNE Décharge Électrique peut entraîner la mortIndique un message de sécurité particulier DES Pièces Chaudes peuvent provoquer des brûlures graves LE Soudage peut provoquer un incendie ou une explosionDES Particules Volantes peuvent blesser les yeux LE Bruit peut endommager l’ouïe ’EMPLOI Excessif peut SUR Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser DES Organes Mobiles peuvent provoquer des blessures Boulevard, Rexdale, Ontario, Canada M9W 1R3 téléphone En ce qui concerne les stimulateurs cardiaques Specifications − SpecificationsSymbols And Definitions − Definitions Output Duty Cycle % WarrantyDuty Cycle And Overheating Exceeding duty cycle can 15.0 Volt-Ampere CurvesVoltage 10.0 100 110 120 130 140 150 160 Installing Work Clamp − InstallationInstalling Welding Gun Drive assembly. Tighten thumbscrew Process/Polarity Table Changing Polarity Installing Gas Supply CO2 gas regulator/flowmeter Selecting a Location And Connecting Input Power Do not move or operate unit Where it could tip Installing Wire Spool And Adjusting Hub Tension Align locking hole in spool with locking pin on spool hub Turn off welding power source Installing Contact Tip And NozzleUse with solid or flux cored wire Threading Welding Wire Lay gun cable out straight Pressure Indicator Scale Tighten − Operation Source or -2. Do not switch under loadControls Material Thickness Reference Chart Weld Parameter Chart 217 618-A Disconnect power − Maintenance & TroubleshootingRoutine Maintenance Overload Protection Drive Motor Protection Replacing Gun Contact Tip Changing Drive Roll Or Wire Inlet GuideTurn Off power before replacing contact tip Tools Needed 030/.035 Groove Disconnect gun from unit Cleaning Or Replacing Gun LinerTo Reassemble Gun Remove handle locking nut Secure head tube in vice Replacing Switch And/Or Head TubeSlide handle Troubleshooting Table Trouble Remedy − Electrical Diagram Circuit Diagram − MIG Welding Gmaw Guidelines Typical MIG Process Connections Thickness to Amperage a Typical MIG Process Control SettingsWire Size Amperage Range Select Voltage Holding And Positioning Welding Gun Perpendicular Drag Conditions That Affect Weld Bead ShapePush Short Normal Long Good Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Penetration Troubleshooting − Excessive SpatterTroubleshooting − Porosity Possible Causes Corrective Actions Troubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Burn-Through Troubleshooting − Distortion Troubleshooting − Waviness Of BeadWeld bead Common MIG Shielding Gases Troubleshooting Guide For Semiautomatic Welding EquipmentApplication Welding power source Welding arc not stable Wire slipping in drive rollsReadjust welding parameters Drive rolls if necessary Replacement Drive Rolls − ACCESSORIES/CONSUMABLESAccessories Consumables Work like a Pro Start Your Professional Support ServiceAssistance Contact your Distributor for Hobart Welding Products