Miller Electric 145 DXR, 145, Blue Star 145 manual Weld Test, Troubleshooting − Porosity

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13-13. Weld Test

2 To 3 in

(51-76 mm)

1/4 in (6.4 mm)

3
	3
	2 To 3 in
	(51-76 mm)
2	2
2
1	1

1Vise

2Weld Joint

3Hammer

Strike weld joint in direction shown. A good weld bends over but does not break.

S-0057-B

13-14. Troubleshooting − Porosity

Porosity − small cavities or holes resulting from gas pockets in weld metal.

Possible Causes	Corrective Actions

Arc length too long.	Reduce arc length.

Damp electrode.	Use dry electrode.

Workpiece dirty.	Remove all grease, oil, moisture, rust, paint, coatings, slag, and dirt from work surface before
	welding.

13-15. Troubleshooting − Excessive Spatter

Excessive Spatter − scattering of molten metal particles that cool to solid form near weld bead.

Possible Causes	Corrective Actions

Amperage too high for electrode.	Decrease amperage or select larger electrode.

Arc length too long or voltage too high.	Reduce arc length or voltage.

OM-4417 Page 46

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Contents Description OM-4417210 403FProcesses File Engine DriveFrom Miller to You Table of Contents Page Electric Shock can kill Symbol UsageArc Welding Hazards HOT Parts can cause severe burnsARC Rays can burn eyes and skin Fumes and Gases can be hazardousBuildup of GAS can injure or kill Welding can cause fire or explosionEngine Hazards Compressed Air HazardsFire or Explosion hazard Welding Wire can cause injuryHOT Parts can cause burns and injury Falling Unit can cause injuryEMF Information Principal Safety StandardsCalifornia Proposition 65 Warnings Radiation can cause interferenceUN Choc Électrique peut tuer Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation LE Soudage peut provoquer un in cendie ou une explosion DES Pièces Chaudes peuvent provoquer des brûlures gravesLES Fumées ET LES GAZ peuvent être dangereux DES Organes Mobiles peuvent pro voquer des blessures LE Bruit peut affecter l’ouïe’EXPLOSION DE LA Batterie peu Risque D’INCENDIE OU D’EXPLO- Sion LA Chaleur DU Moteur peut pro- voquer un incendie’AIR Comprimé peut provoquer des blessures LES Fils DE Soudage peuvent provoquer des blessures LE Surchauffement peut endom- mager le moteur électriqueDES Organes Mobiles peuvent provoquer des blessures ’EMPLOI Excessif peutInformation EMF Proposition californienne 65 AvertissementsPrincipales normes de sécurité Weld, Power, And Engine Specifications − SpecificationsSymbol Definitions − DefinitionsVolt-Ampere Curves Dimensions, Weights, And Operating AnglesDimensions Fuel Consumption 100% Duty Cycle at 80 Amperes CC/DC Generator Power CurveDuty Cycle Minutes WeldingMovement − InstallationInstalling Welding Generator HazardsOil Grounding Generator When Supplying Building SystemsEngine Prestart Checks − Standard Model Connecting The Battery DX Models Only Engine Prestart Checks − DX Model45 m 60 m 70 m 90 m 105 m 120 m 10 − Connecting To Weld Output TerminalsSelecting Weld Cable Sizes Put terminals− Operating the Welding Generator Controls Standard Models See SectionTo Start Description Of Controls Standard Models See SectionStop engine and add oil if light goes on see Section Controls DX Models See Section Description Of Controls DX Models See Section AC Receptacle RC1 Generator Power Panel Receptacles− Operating Auxiliary Equipment − Maintenance Routine MaintenanceStop engine Servicing Air CleanerPrecleaner Paper Element Standard Model ShownValve Adjusting Engine Speed Standard Models OnlyStop Engine Close Tools NeededIdle Speed Adjustment Adjusting Engine Speed DX Models OnlyWeld/Power Speed Adjustment Generator Power − TroubleshootingTroubleshooting WeldingEngine Recommended Spare Parts − Parts ListRecommended Spare Parts − Electrical Diagrams Circuit Diagram For Standard ModelsCircuit Diagram for DX Models Grounding Generator To Truck Or Trailer Frame − Generator Power GuidelinesSelecting Equipment Grounding When Supplying Building Systems How Much Power Does Equipment Require?Industrial Motors Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Farm/Home Equipment Rating Starting Watts Running WattsApproximate Power Requirements For Contractor Equipment Contractor Rating Starting Watts Running WattsSingle-Phase Induction Motor Starting Requirements Power Required To Start MotorHow Much Power Can Generator Supply? KVA/HP x HP x 1000 / Volts = Starting AmperageTypical Connections To Supply Standby Power Current Load Watts Amperes Selecting Extension Cord Use Shortest Cord PossibleCord Lengths for 120 Volt Loads Cord Lengths for 240 Volt LoadsStick Welding Procedure − Stick Welding Smaw GuidelinesStriking an Arc − Tapping Technique Electrode and Amperage Selection ChartStriking an Arc − Scratch Start Technique Positioning Electrode Holder Poor Weld Bead CharacteristicsGood Weld Bead Characteristics 10-30 9090 End View of Work AngleConditions That Affect Weld Bead Shape Electrode Movement During WeldingTee Joint Butt JointsLap Joint 16 in 30 1.6 mm Tack WeldsWeld Test Troubleshooting − PorosityTroubleshooting − Excessive Spatter Possible Causes Corrective ActionsTroubleshooting − Excessive Penetration Troubleshooting − Incomplete FusionTroubleshooting − Lack Of Penetration Troubleshooting − Distortion Troubleshooting − Burn-ThroughTroubleshooting − Waviness Of Bead Support ServiceYour distributor also gives For assistance in filing or settling claims, contact To locate a Distributor or Service Agency visitMiller Electric Mfg. Co Your distributor and/or equipment manufacturer’s