Miller Electric Renegade 180 Troubleshooting − Excessive Spatter, Troubleshooting − Porosity

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12-8. Troubleshooting − Excessive Spatter

	Excessive Spatter − scattering of molten metal particles that
	cool to solid form near weld bead.
	S-0636
Possible Causes	Corrective Actions
Wire feed speed too high.	Select lower wire feed speed.
Voltage too high.	Select lower voltage range.
Electrode extension (stickout) too long.	Use shorter electrode extension (stickout).
Workpiece dirty.	Remove all grease, oil, moisture, rust, paint, undercoating, and dirt from work surface before welding.
Insufficient shielding gas at welding arc.	Increase flow of shielding gas at regulator/flowmeter and/or prevent drafts near welding arc.
Dirty welding wire.	Use clean, dry welding wire.
	Eliminate pickup of oil or lubricant on welding wire from feeder or liner.
Wrong polarity.	Configure polarity as shown in Section 5-8. Always read and follow wire manufacturer’s
	recommended polarity, and see Section 5-7.

12-9. Troubleshooting − Porosity

	Porosity − small cavities or holes resulting from gas pockets
	in weld metal.
	S-0635
Possible Causes	Corrective Actions
Insufficient shielding gas at welding arc.	Increase flow of shielding gas at regulator/flowmeter and/or prevent drafts near welding arc.
	Remove spatter from gun nozzle.
	Check gas hoses for leaks.
	Place nozzle 1/4 to 1/2 in (6-13 mm) from workpiece.
	Hold gun near bead at end of weld until molten metal solidifies.
Wrong gas.	Use welding grade shielding gas; change to different gas.
Dirty welding wire.	Use clean, dry welding wire.
	Eliminate pick up of oil or lubricant on welding wire from feeder or liner.
Workpiece dirty.	Remove all grease, oil, moisture, rust, paint, coatings, and dirt from work surface before welding.
	Use a more highly deoxidizing welding wire (contact supplier).
Welding wire extends too far out of nozzle.	Be sure welding wire extends not more than 1/2 in (13 mm) beyond nozzle.
Wrong polarity.	Configure polarity as shown in Section 5-8. Always read and follow wire manufacturer’s
	recommended polarity, and see Section 5-7.

OM-228 042 Page 47

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Contents File Engine Drive OM-228 042BProcesses DescriptionFrom Miller to You Table of Contents 10-1 − MaintenanceHOT Parts can cause severe burns Symbol UsageArc Welding Hazards Electric Shock can killWelding can cause fire or explosion Fumes and Gases can be hazardousBuildup of GAS can injure or kill ARC Rays can burn eyes and skinCompressed Air Hazards Engine HazardsFalling Unit can cause injury Welding Wire can cause injuryHOT Parts can cause burns and injury Fire or Explosion hazardRadiation can cause interference Principal Safety StandardsCalifornia Proposition 65 Warnings EMF InformationIndique des instructions spécifiques Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation UN Choc Électrique peut tuerDES 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 affecter l’ouïe ’EXPLOSION DE LA Batterie peuDES Organes Mobiles peuvent pro voquer des blessures LA Chaleur DU Moteur peut pro- voquer un incendie ’AIR Comprimé peut provoquer des blessuresRisque D’INCENDIE OU D’EXPLO- Sion ’EMPLOI Excessif peut LE Surchauffement peut endom- mager le moteur électriqueDES Organes Mobiles peuvent provoquer des blessures LES Fils DE Soudage peuvent provoquer des blessuresProposition californienne 65 Avertissements Principales normes de sécuritéInformation EMF − Definitions − SpecificationsSymbol Definitions Weld, Power, And Engine SpecificationsVolt-Ampere Curves Gun SpecificationsDimensions, Weights, And Operating Angles Optional Lifting Eye Weight RatingFuel Consumption Power Source Duty CycleAC Amperes Generator Power CurveGun Duty Cycle And Overheating VoltsAirflow Clearance − InstallationInstalling Welding Generator MovementUse ground device as stated in electrical codes Grounding Generator When Supplying Building SystemsOil Connecting The Battery Electric Start Models OnlyEngine Prestart Checks + −Work Cable Routing Inside Unit Installing Welding GunChanging Weld Polarity Weld Process/Polarity TableConnecting Single−Phase, 230 Volt AC Utility Input Power Shown with optional cylinder rackThis unit can provide weld out Adapter Electrical Service GuideInstalling Wire Spool And Adjusting Hub Tension When a slight force is needed to turn spool, tension is setWeld Position Stamped Stamped .030/.035 Tighten Pressure Indicator Scale Threading The Welding GunTools Needed 150 mm 030/.035 Groove Wood Controls See Section − Operating the Welding GeneratorDescription Of Controls See Section To StartTo Stop Weld Parameter Chart 20 ga 18 ga 16 ga 14 ga Stainless Steel And 100% CO2 Weld ParametersGenerator Power Panel Receptacles Generator power decreases as weld current increases− Operating Auxiliary Equipment Power Source Routine Maintenance − MaintenanceTip Saver/Short Circuit Protection Gun Routine MaintenanceWelding Power Source Overload Protection Drive Motor ProtectionChanging Drive Roll Or Wire Inlet Guide Turn Off power before replacing contact tipReplacing Gun Contact Tip Maintaining Gun Turn off welding power source/wire feederTools Needed 19 mm Replacing Switch And/Or Head TubeStandard Model Shown Stop engine Servicing Air CleanerPrecleaner Paper Element Do not wash paper element or clean with compressed airStop engine. Close fuel valve Adjusting Engine SpeedWelding − TroubleshootingTroubleshooting Generator PowerWire Feeder EngineDoes not run − Parts List Recommended Spare PartsRecommended Spare Parts OM-217 454 − Electrical DiagramsGun Work Clamp Workpiece Regulator Flowmeter Wire Feeder Power Source Shielding Gas− MIG Welding Gmaw Guidelines Typical MIG Process ConnectionsMaterial thickness determines weld parameters Typical MIG Process Control SettingsThese settings are guidelines only. Material Wire Suggested Wire Speed Groove Welds Nozzle, and tip of wire is posi Holding And Positioning Welding Gun Tioned correctly on seamFillet Weld Electrode Extension Stickout Conditions That Affect Weld Bead ShapeGun Angles And Weld Bead Profiles Electrode Extensions StickoutPoor Weld Bead Characteristics Good Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Spatter Troubleshooting − PorosityPossible Causes Corrective Actions Troubleshooting − Excessive Penetration 12-11 Troubleshooting − Lack Of PenetrationTroubleshooting − Incomplete Fusion 12-13 Troubleshooting − Burn-Through Troubleshooting − Waviness Of BeadTroubleshooting − Distortion Common MIG Shielding Gases ApplicationFlat & Horizontal1 Fillet − Generator Power Guidelines Selecting EquipmentGrounding Generator To Truck Or Trailer Frame How Much Power Does Equipment Require? Grounding When Supplying Building SystemsFarm/Home Equipment Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Industrial Motors Rating Starting Watts Running WattsContractor Rating Starting Watts Running Watts Approximate Power Requirements For Contractor EquipmentKVA/HP x HP x 1000 / Volts = Starting Amperage Power Required To Start MotorHow Much Power Can Generator Supply? Single-Phase Induction Motor Starting RequirementsTypical Connections To Supply Standby Power Cord Lengths for 240 Volt Loads Selecting Extension Cord Use Shortest Cord PossibleCord Lengths for 120 Volt Loads Current Load Watts AmperesSOCKET/WRENCH Selection Table Standard Metric Service Your distributor also givesSupport Your distributor and/or equipment manufacturer’s To locate a Distributor or Service Agency visitMiller Electric Mfg. Co For assistance in filing or settling claims, contact