Miller Electric OM-230 manual Welding Power Source Duty Cycle And Overheating, Volt-Ampere Curves

Page 16

.A complete Parts List is available at www.MillerWelds.com

4-2. Welding Power Source Duty Cycle And Overheating

500

450

400

		350
	AMPERES	300
	AMPERES	250
		250
		200
	WELD	150
	WELD	100
		100
		50

10

20

30

40

% DUTY CYCLE

60% Duty Cycle At 200 Amperes

6 Minutes Welding

4 Minutes Resting

Overheating

0

15

Minutes

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

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

NOTICE − Exceeding duty cycle can damage unit and void warranty.

50

60

70

80 90 100

40% Duty Cycle At 250 Amperes

4 Minutes Welding

6 Minutes Resting

A or V

OR

Reduce Duty Cycle

duty1 4/95 − 150 215-A

4-3. Volt-Ampere Curves

VOLTS

1	1 Normal Volt-Ampere Curves
35	The volt-ampere curves show the
	The volt-ampere curves show the
30	normal minimum and maximum
30	voltage and amperage output
	capabilities of the welding power

	25	source. Curves of other settings fall
	25	between the curves shown.
		between the curves shown.

20

15

10

5

0

0

100

200

300

400

AMPERES

ssb1.1 10/91 − 196 844 / S-0700

OM-230 693 Page 12

Image 16

Contents OM-230 693C ProcessesDescription File MIG GmawFrom Miller to You Table of Contents − MIG Welding Gmaw Guidelines − Parts ListTypical MIG Process Connections Symbol Usage Arc Welding HazardsElectric Shock can kill HOT Parts can cause severe burnsFumes and Gases can be hazardous ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal or Dirt can injure eyesWelding Wire can cause injury Fire or Explosion hazardFalling Unit can cause injury Moving Parts can cause injuryPrincipal Safety Standards California Proposition 65 WarningsEMF Information About Implanted Medical DevicesSymboles utilisés UNE Décharge Électrique peut entraîner la mortLES Fumées ET LES GAZ peuvent être dangereux DES Pièces Chaudes peuvent provoquer des brûlures gravesLE Soudage peut provoquer un in cendie ou une explosion LE Bruit peut endommager l’ouïe LES Bouteilles peuvent exploser si elles sont endommagéesRisque D’INCENDIE OU D’EXPLO LA Chute DE L’APPAREIL peut blesserLES Fils DE Soudage peuvent provoquer des blessures Proposition californienne 65 AvertissementsLE Soudage À L’ARC risque de provoquer des interférences Information EMF Principales normes de sécuritéEn ce qui concerne les implants médicaux OM-230 693 Symbols And Definitions SpecificationsVolt-Ampere Curves Welding Power Source Duty Cycle And OverheatingOverheating Connecting To Weld Output Terminals Installing Work Cable And ClampConnecting Spoolmatic 15A Or 30A Gun Gun End Gun Liner Wire Outlet Guide Connecting XR Aluma-Pro, XR Edge, XR-A Gun, Or XR-A Python32 in 2.4 mm Setting Gun Polarity For Wire Type Installing Gas SupplyPolarity Changeover Label Information 11/16Installing Wire Spool And Adjusting Hub Tension Positioning Jumper LinksElectrical Service Guide Input Voltage200 230 460 575 127 20618 in 457 mm of space for airflow =GND/PE Earth Ground Selecting a Location And Connecting Input PowerL2L1 230 VAC Threading Welding Wire PressureScale Remove gun nozzle and contact tipOM-230 693 Weld Parameters 226 650-B − Operation ControlsRun−in Wire Feed Speed Settings JOG ModeTrigger and pull the trigger again momentarily one second Voltmeter And Wire Feed Speed Meter Operation Jog ModePower Up Status Welding StatusTimers Set Up Push Motor Torque SUP Or Reset rES Changing Drive Roll and Wire Inlet Guide Routine MaintenanceUnit Overload Aligning Drive Rolls and Wire Guide Turn Off powerAssembly open View is from top of drive rollsTroubleshooting Trouble Remedy OM-230 693 − Electrical Diagram 229 485-A − MIG Welding Gmaw Guidelines Typical MIG Process ConnectionsTypical MIG Process Control Settings Wire Size Amperage RangeSelect Wire Size Recommendation Wire Speed Select VoltageHolding And Positioning Welding Gun Side View Of Gun AngleConditions That Affect Weld Bead Shape Push Perpendicular DragShort Normal Long Slow NormalGood Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Excessive Spatter Troubleshooting − PorosityTroubleshooting − Excessive Penetration 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 arc not stable Wire slipping in drive rolls Readjust welding parametersWelding power source Drive rolls if necessaryDrive Roll And Wire Guide Kits 087Grooved 056 0.9 mm 204Your distributor also gives ServiceSupport To locate a Distributor or Service Agency visit Miller Electric Mfg. CoFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s