Hobart Welding Products OM-947 manual Duty Cycle And Overheating, Volt-Ampere Curves

Page 16

4-2. 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)

 

200

 

 

 

 

 

 

 

opens, output stops, and cooling

Amperes

 

 

 

 

 

 

 

fan runs. Wait fifteen minutes for

135

 

 

 

 

 

 

 

unit to cool. Reduce amperage or

 

 

 

 

 

 

 

 

duty cycle before welding.

 

100

 

 

 

 

 

 

 

NOTICE − Exceeding duty cycle

Output

80

 

 

 

 

 

 

 

can damage unit or gun and void

60

 

 

 

 

 

 

 

warranty.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

40

 

 

 

 

 

 

 

 

 

20

 

 

 

 

 

 

 

 

 

10

2

4

6

8 10

 

40

60

80100

 

1

20

 

 

 

 

Duty Cycle %

 

 

 

 

 

 

 

20% duty cycle at 85 amps

 

 

 

 

 

2 Minutes Welding

 

 

8 Minutes Resting

 

 

Overheating

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

A or V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

 

OR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Minutes

 

 

Reduce Duty Cycle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

duty1 4/95 − 210 517-B

4-3. Volt-Ampere Curves

 

28

 

26

 

24

 

22

Voltage

20

18

 

16

14

12

10

8

0

10

20

30

40

50

60

70

80

90

100

110

120

130

Amperage

The volt-ampere curves show the minimum and maximum voltage and amperage output capabilities of the welding power source. Curves of other settings fall between the curves shown.

Range 1

Range 2

Range 3

Range 4

ssb1.1 10/91 − 210 518-B

OM-947 Page 12

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Contents Description ProcessesFile Flux Cored Fcaw From Hobart to You Protect Your InvestmentTable of Contents Warranty Symbol Usage Arc Welding HazardsElectric Shock can kill HOT Parts can burnFumes 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 injure Fire or Explosion hazardFalling Equipment can injure Moving Parts can injurePrincipal 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 LES Pièces Chaudes peuvent provoquer des brûluresLE Soudage peut provoquer un incendie ou une explosion LE Bruit peut endommager l’ouïe LES Bouteilles peuvent exploser si elles sont endommagéesRisque D’INCENDIE OU LA Chute DE L’ÉQUIPEMENT peut provoquer des blessuresProposition californienne 65 Avertissements Les Pièces Mobiles peuvent causer des blessuresLES Fils DE Soudage peuvent provoquer des blessures LE Soudage À L’ARC risque de provoquer des interférencesInformations relatives aux CEM Principales normes de sécuritéEn ce qui concerne les implants médicaux OM-947 − Specifications Symbols And DefinitionsSpecifications − DefinitionsDuty Cycle And Overheating Volt-Ampere CurvesInstalling Work Clamp − InstallationTools Needed Slide insulating grips over handles OM-947 Process/Polarity Table Changing PolarityInstalling Gas Supply Tools Needed 11/16, 1-1/8 Shielding GasInstalling Wire Spool And Adjusting Hub Tension Tools NeededSerial Number And Rating Label Location 460 mmInstalling Contact Tip And Nozzle Turn off welding power sourceThreading Welding Wire − Operation ControlsOperating The Gun LoadOM-947 Weld Parameter Chart 210 − Maintenance &TROUBLESHOOTING Routine MaintenanceOverload Protection Drive Motor ProtectionChanging Drive Roll Or Wire Inlet Guide Turn Off power before replacing contact tip Replacing Gun Contact TipCleaning Gun Liner Head Mm / 10 mm Tube Replacing Gun LinerLoosen liner setscrew 10 mm Troubleshooting Table Secure power cord plug in receptacle see SectionPower source see Section Trouble Remedy− Electrical Diagram Circuit DiagramTypical Fcaw Process Connections − Wire Welding GuidelinesTypical MIG Process Connections Typical Control Settings Wire Size Amperage RangeAmperage Select VoltageHolding And Positioning Welding Gun Groove WeldsShort Normal Long Conditions That Affect Weld Bead ShapeSlow Normal Fast Good 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 BeadTroubleshooting Guide For Semiautomatic Welding Equipment − Parts List Main AssemblyOptional 195 157R − See TablePkg Pkg209 195 Hub Kit For 8 in Wire SpoolWeatherproof Nylon Work like a Pro Page Page Support ServiceAssistance Contact your Distributor for Hobart Welding Products

OM-947 specifications

Hobart Welding Products has made a significant mark in the welding industry with its cutting-edge equipment, and the Hobart OM-947 is no exception. This multi-process welder stands out for its versatility and user-friendly design, ideal for both beginners and experienced welders alike.

One of the main features of the OM-947 is its multi-process capability, allowing users to perform MIG, TIG, and stick welding, all in one machine. This flexibility makes it an appealing choice for diverse welding applications, whether in automotive repair, metal fabrication, or industrial maintenance. The OM-947 can easily switch between processes, ensuring efficiency and convenience in various tasks.

The machine is engineered with advanced technology that enhances welding performance. Its inverter technology provides a stable arc and reduces energy consumption, which not only cuts down operational costs but also improves the welder's overall performance. The Hobart OM-947 boasts a high-duty cycle, allowing users to operate it for extended periods without overheating, making it suitable for professional environments.

In terms of characteristics, the OM-947 features a digital display that allows for precise control over welding parameters. This user-friendly interface simplifies the adjustment process, enabling welders to focus more on their craft rather than struggling with complex settings. The machine also comes with a built-in automatic voltage control, which adjusts the voltage according to the chosen process and material thickness, ensuring optimal welding conditions and reducing the risk of defects.

Another notable aspect of the OM-947 is its portability. Weighing in at a manageable level, coupled with a compact design, the machine is easy to transport between job sites, making it ideal for mobile welders. Furthermore, the rugged construction of the unit ensures durability even in demanding environments.

Safety features are paramount in welding equipment, and the Hobart OM-947 does not disappoint. It includes a thermal overload protection system that prevents overheating and potential damage to the welder, offering peace of mind during use.

Overall, the Hobart Welding Products OM-947 delivers impressive performance, versatility, and user-friendliness. It is designed for welders who demand quality and reliability from their equipment while being accessible enough for those who are just starting their welding journey. With its innovative features and robust design, the OM-947 truly sets a benchmark in the world of welding.
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