Miller Electric XLT 185 warranty Troubleshooting Guide For Semiautomatic Welding Equipment

Page 42

9-17. Troubleshooting Guide For Semiautomatic Welding Equipment

Problem

Probable Cause

Remedy

 

 

 

Wire feed motor operates, but

Too little pressure on wire feed rolls.

Increase pressure setting on wire feed rolls.

wire does not feed.

 

 

Incorrect wire feed rolls.

Check size stamped on wire feed rolls, replace to match

 

 

 

wire size and type if necessary.

 

 

 

 

Wire spool brake pressure too high.

Decrease brake pressure on wire spool.

 

 

 

 

Restriction in the gun and/or assembly.

Check and replace cable, gun, and contact tip if

 

 

damaged. Check size of contact tip and cable liner,

 

 

replace if necessary.

 

 

 

Wire curling up in front of the

Too much pressure on wire feed rolls.

Decrease pressure setting on wire feed rolls.

wire feed rolls (bird nesting).

 

 

Incorrect cable liner or gun contact tip size.

Check size of contact tip and check cable liner length

 

 

 

and diameter, replace if necessary.

 

 

 

 

Gun end not inserted into drive housing properly.

Loosen gun securing bolt in drive housing and push gun

 

 

end into housing just enough so it does not touch wire

 

 

feed rolls.

 

 

 

 

Dirty or damaged (kinked) liner.

Replace liner.

 

 

 

Wire feeds, but no gas flows.

Gas cylinder empty.

Replace empty gas cylinder.

 

 

 

 

Gas nozzle plugged.

Clean or replace gas nozzle.

 

 

 

 

Gas cylinder valve not open or flowmeter not adjusted.

Open gas valve at cylinder and adjust flow rate.

 

 

 

 

Restriction in gas line.

Check gas hose between flowmeter and wire feeder, and

 

 

gas hose in gun and cable assembly.

 

 

 

 

Loose or broken wires to gas solenoid.

Have Factory Authorized Service Agent repair wiring.

 

 

 

 

Gas solenoid valve not operating.

Have Factory Authorized Service Agent replace gas

 

 

solenoid valve.

 

 

 

 

Incorrect primary voltage connected to welding power

Check primary voltage and relink welding power source

 

source.

for correct voltage.

 

 

 

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-230 832 Page 38

Image 42
Contents Description Arc Welding Power Source and Wire FeederOM-230 832A 2007−02 Processes Flux Cored Arc FcawPage Table of Contents − Parts List − MIG Welding Gmaw GuidelinesTypical MIG Process Connections Arc Welding Hazards Symbol UsageMarks a special safety message Electric Shock can killFlying Metal can injure eyes ARC Rays can burn eyes and skinWelding can cause fire or explosion Buildup of GAS can injure or killCalifornia Proposition 65 Warnings Principal Safety Standards EMF InformationAbout Pacemakers UNE Décharge Électrique peut entraîner la mort LES Fumées ET LES GAZ peuvent être dangereuxIndique 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 blessuresBoulevard, Rexdale, Ontario, Canada M9W 1R3 téléphone En ce qui concerne les stimulateurs cardiaquesSpecifications − SpecificationsSymbols And Definitions − DefinitionsAmperes Duty Cycle And OverheatingVolt-Ampere Curves OutputClose door − InstallationInstalling Welding Gun IncorrectInstalling Work Clamp Process/Polarity Table Changing PolarityInstalling Gas Supply After flow is set, close feedhead pressure assemblyTools Needed 1-1/8 Selecting a Location And Connecting Input Power First, and never to a line ter- minalElectrical Service Guide Installing Wire Spool And Adjusting Hub TensionTools Needed Installing Contact Tip And Nozzle Threading Welding Wire Wire Speed Control − OperationControls Weld Parameter Chart For 230 VAC Model CFH227010 Disconnect power before maintaining − Maintenance &TROUBLESHOOTINGRoutine Maintenance Overload Protection Drive Motor ProtectionReplacing Gun Contact Tip Changing Drive Roll Or Wire Inlet GuideTurn Off power before replacing contact tip 030/.035 Groove Stamped 023/.025 Groove Stamped .030/.035Disconnect gun from unit Cleaning Or Replacing Gun LinerInstall gas diffuser, adapter, contact tip, and nozzle To Reassemble GunReplacing Switch And/Or Head Tube Troubleshooting Table Trouble RemedyOM-230 832 − Electrical Diagram Circuit Diagram228 180-A Typical MIG Process Connections Regulator Flowmeter Wire Feeder Power Source Shielding− MIG Welding Gmaw Guidelines GasThickness to Amperage a Typical MIG Process Control SettingsWire Size Amperage Range Select VoltageHolding And Positioning Welding Gun Perpendicular Drag Conditions That Affect Weld Bead ShapePush Short Normal LongPoor Weld Bead Characteristics Good Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Penetration Troubleshooting − Excessive SpatterTroubleshooting − Porosity Possible Causes Corrective ActionsTroubleshooting − Lack Of Penetration Troubleshooting − Incomplete FusionTroubleshooting − Burn-Through Common MIG Shielding Gases Troubleshooting − Waviness Of BeadTroubleshooting − Distortion Weld beadTroubleshooting Guide For Semiautomatic Welding Equipment OM-230 832 − Parts List Main AssemblyDia Part 228 H-10 Gun 195Optional Drive Rolls OptionsPage Work like a Pro Warranty Owner’s Record