Miller Electric H-10, MW 140 Plus warranty Welding arc not stable Wire slipping in drive rolls

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Problem

Probable Cause

Remedy

 

 

 

Welding arc not stable.

Wire slipping in drive rolls.

Adjust pressure setting on wire feed rolls. Replace worn

 

 

drive rolls if necessary.

 

 

 

 

Wrong size gun liner or contact tip.

Match liner and contact tip to wire size and type.

 

 

 

 

Incorrect voltage setting for selected wire feed speed on

Readjust welding parameters.

 

welding power source.

 

 

 

 

 

Loose connections at the gun weld cable or work cable.

Check and tighten all connections.

 

 

 

 

Gun in poor shape or loose connection inside gun.

Repair or replace gun as necessary.

 

 

 

OM-219 316 Page 37

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Contents Processes OM-219 316C→Description 2006−10Page Table of Contents − Parts List Marks a special safety message Symbol UsageArc Welding Hazards Electric Shock can killWelding can cause fire or explosion ARC Rays can burn eyes and skinFlying Metal can injure eyes Buildup of GAS can injure or killCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information Indique un message de sécurité particulier UNE Décharge Électrique peut entraîner la mortLES Fumées ET LES GAZ peuvent être dangereux Incendie ou une explosion LE Soudage peut provoquer unDES Particules Volantes peuvent blesser les yeux DES Pièces Chaudes peuvent provoquer des brûlures gravesLA Chute DE L’APPAREIL peut blesser Risque D’INCENDIE OU D’EXPLO’EMPLOI Excessif peut SUR DES Organes Mobiles peuvent provoquer des blessuresEn ce qui concerne les stimulateurs cardiaques Principales normes de sécuritéSymbols And Definitions − SpecificationsSpecifications − DefinitionsDuty Cycle And Overheating WarrantyOutput Duty Cycle % Exceeding duty cycle canAmperage Volt-Ampere CurvesInstalling Welding Gun − InstallationIncorrect CorrectChanging Polarity Process/Polarity TableCO 2 gas regulator/flowmeter Installing Gas SupplyDo not move or operate unit where it could tip Selecting a Location And Connecting Input PowerInstalling 8 in 203 mm Wire Spool Installing Wire Spool And Adjusting Hub TensionFlux Nozzle Installing Contact Tip And NozzleHold wire tightly to keep it from unraveling Threading Welding WireControls − OperationWeld Parameter Chart 217 618-A Routine Maintenance − Maintenance &TROUBLESHOOTINGOverload Protection Drive Motor ProtectionReplacing Gun Contact Tip Changing Drive Roll Or Wire Inlet GuideTurn Off power before replacing contact tip To Reassemble Gun Cleaning Or Replacing Gun LinerDisconnect gun from unit Replacing Switch And/Or Head Tube Does not run Troubleshooting TableTrouble Remedy Circuit Diagram − Electrical DiagramTypical MIG Process Connections − MIG Welding Gmaw GuidelinesWire Size Amperage Range Typical MIG Process Control SettingsThickness to Amperage a Select VoltageHolding And Positioning Welding Gun Conditions That Affect Weld Bead Shape Gun Movement During Welding Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Troubleshooting − Porosity Troubleshooting − Excessive SpatterTroubleshooting − Excessive Penetration Possible Causes Corrective ActionsTroubleshooting − Burn-Through Troubleshooting − Lack Of PenetrationTroubleshooting − Incomplete Fusion Troubleshooting − Distortion Troubleshooting − Waviness Of BeadWire does not feed Troubleshooting Guide For Semiautomatic Welding EquipmentCommon MIG Shielding Gases ApplicationWelding arc not stable Wire slipping in drive rolls Main Assembly − Parts ListDia Part Description Quantity Dia Part Description Quantity Mkgs 195 H-10 GunOptions Optional Drive RollsWarranty Owner’s Record