Miller Electric OM-1313 manual Welding Power Source Duty Cycle And Overheating, Definition

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2-3. Welding Power Source Duty Cycle And Overheating

Duty Cycle is percentage of 10 min- utes that unit can weld at rated load without overheating.

If unit overheats, thermostat(s) opens, output stops, and cooling fan runs. Wait fifteen minutes for unit to cool. Reduce amperage or voltage, or duty cycle before welding.

Y Exceeding duty cycle can damage unit and void warranty.

60% Duty Cycle At 150 Amperes

6 Minutes Welding	4 Minutes Resting

Overheating

0

A or V

15

OR

Reduce Duty Cycle

Minutes

duty1 4/95 – SB-181 009

2-4. Welding Gun Duty Cycle And Overheating

CAUTION

WELDING LONGER THAN RATED DUTY CYCLE can damage gun and void warranty.

•	Do not weld at rated load longer than shown below.
•	Using gasless flux cored wire reduces gun duty cycle.	warn7.1 8/93

Definition

0

10

Minutes

Duty Cycle is percentage of 10 minutes that gun can weld at rated load without overheating.

.023 To .045 in (0.6 To 1.1 mm)

Hard Or Flux Cored Wires

100% Duty Cycle At 150 Amperes

Using CO2

100% Duty Cycle At 120 Amperes

Using Mixed Gases

Continuous Welding

.023 To .045 in (0.6 To 1.1 mm) Hard Or Flux Cored Wires

60% Duty Cycle At 200 Amperes

Using CO2

60% Duty Cycle At 150 Amperes

Using Mixed Gases

6 Minutes Welding	4 Minutes Resting
	SB1.1 8/93

OM-1313 Page 6

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Contents September Arc Welding Power Source Wire FeederVisit our website at MIG Gmaw Welding Flux Cored Fcaw WeldingFrom Miller to You Table of Contents Page Arc Welding Hazards Symbol UsageMarks a special safety message OM-1313ARC Rays can burn eyes and skin Principal Safety Standards Fire or Explosion hazardEMF Information About PacemakersSpecifications InstallationVolt-Ampere Curves Welding Gun Duty Cycle And Overheating Welding Power Source Duty Cycle And OverheatingExceeding duty cycle can damage unit and void warranty OverheatingInstalling Work Clamp Installing Gas SupplyPolarity Changeover Label Installing Welding GunSetting Gun Polarity Tools Needed 11/16Reinstall wrapper Tools Needed 7/16 Installing Wire Spool And Adjusting Hub TensionTurn Off unit, and disconnect input power Changing Input VoltageInput Voltage Electrical Service GuideSelecting a Location And Connecting Input Power Min Grounding Conductor Size In AWG/KcmilThreading Welding Wire OM-1313 Front Panel Controls OperationControls For Standard Units Weld Parameter Chart Higher e.g Volts AC Lower e.g Volts ACOM-1313 Routine Maintenance Maintenance & TroubleshootingMonths Head Tube Remove nozzle, contact tip, and adapter Cleaning Or Replacing Gun LinerDisconnect gun first Blow out gun casing Remove linerReplacing Switch And/Or Head Tube Remove handle locking nut Slide handleReplacing Gun Contact Tip TroubleshootingSee Section Electrical Diagram Circuit DiagramTypical MIG Process Connections Wire Feeder Power Source Gun Work Clamp WorkpieceMIG Welding Gmaw Guidelines Shielding Gas Regulator/ FlowmeterSelect Wire Size Typical MIG Process Control SettingsWire Recommendation Wire Speed Select VoltageHolding And Positioning Welding Gun Perpendicular Drag Conditions That Affect Weld Bead ShapePush Short Normal LongGood Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Troubleshooting Excessive Penetration Troubleshooting Excessive SpatterTroubleshooting Porosity Possible Causes Corrective ActionsTroubleshooting 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 necessaryOM-1313 Parts List Main AssemblyDia Part Mkgs Description Quantity Center Baffle w/Components Baffle, Center w/Components -1 Item M-15 Gun -1 Item Includes ItemsPage Your distributor also gives ServiceSupport Owner’s Record