Hobart Welding Products 217 694E, OM-925 manual Installing Gas Supply, CO 2 gas regulator/flowmeter

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

5-5. Installing Gas Supply

1

.DO NOT use Argon/Mixed gas regulator/flowmeter

with CO2 shielding gas. See Parts List for optional
CO2 gas regulator/flowmeter.	4

2

7

3

5

Argon Gas Or

Mixed Gas

6

Tools Needed:

5/8, 1-1/8 in

Feedhead Pressure Assembly Open

Obtain gas cylinder and chain to running gear, wall, or other stationary support so cylinder cannot fall and break off valve.

1Cap

2Cylinder Valve

Remove cap, stand to side of valve, and open valve slightly. Gas flow blows dust and dirt from valve. Close valve.

3Cylinder

4Regulator/Flowmeter Install so face is vertical.

5Regulator/Flowmeter Gas Hose Connection

6Welding Power Source Gas Hose Connection

Connect supplied gas hose between regulator/flowmeter gas hose connection, and fitting on rear of welding power source.

7 Flow Adjust

Flow rate should be set when gas is flowing through welding power source and welding gun. Open feedhead pressure assembly so that wire will not feed. Press gun trigger to start gas flow.

Typical flow rate is 20 cfh (cubic feet per hour). Check wire manufacturer’s recommended flow rate.

After flow is set, close feedhead pressure assembly.

Feedhead Pressure Assembly Closed	Ref. 804 654-A / 802 441 / Ref. 804 623-A

OM-925 Page 16

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Contents Arc Welding Power Source Wire Feeder ProcessesDescription OM-925217 694E 2008−10From Hobart to You Protect Your InvestmentTable of Contents − ACCESSORIES/CONSUMABLES 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 DevicesIndique des instructions spécifiques Symboles utilisésUNE Décharge Électrique peut entraîner la mort 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 LE Bruit peut endommager l’ouïe LES Bouteilles peuvent exploser si elles sont endommagéesRisque D’INCENDIE OU D’EXPLO- Sion LA Chute DE L’APPAREIL peut blesserLE Soudage À L’ARC risque de provoquer des interférences Proposition californienne 65 AvertissementsLES Fils DE Soudage peuvent provoquer des blessures En ce qui concerne les implants médicaux Principales normes de sécuritéInformation EMF OM-925 − Specifications Symbols And DefinitionsSpecifications − DefinitionsWarranty Duty Cycle And OverheatingOutput Duty Cycle % Can damage unit or gun and voidVolt-Ampere Curves Voltage15.0 10.0 100 110 120 130 140 150 160− Installation Installing Welding GunInstalling Work Clamp Be sure that gun end is tight against drive assemblyProcess/Polarity Table Changing PolarityInstalling Gas Supply Feedhead Pressure Assembly OpenFeedhead Pressure Assembly Closed Do not use Argon/Mixed gas regulator/flowmeterSelecting a Location And Connecting Input Power Do not move or operate unit Where it could tipRetaining ring used with 8 in 203 mm spool only Installing Wire Spool And Adjusting Hub TensionAlign locking hole in spool with locking pin on spool hub Use with solid or flux cored wire Installing Contact Tip And NozzleTurn off welding power source Lay gun cable out straight Threading Welding WireHold wire tightly to keep it from unraveling With a setting of 2 or 3 on the scale Pressure Indicator ScaleTighten Desired drive roll pressure. StartControls Source or -2. Do not switch under load− Operation Material Thickness Reference Chart Weld Parameter Chart 217 618-A − Maintenance & Troubleshooting Routine MaintenanceOverload Protection Drive Motor ProtectionChanging Drive Roll Or Wire Inlet Guide Turn Off power before replacing contact tipReplacing Gun Contact Tip Stamped Stamped .030/.035To Reassemble Gun Cleaning Or Replacing Gun LinerDisconnect gun from unit Replacing Switch And/Or Head Tube Troubleshooting Table Trouble Remedy− Electrical Diagram Circuit DiagramWire Feeder Power Source Shielding Gas − MIG Welding Gmaw GuidelinesTypical MIG Process Connections Regulator FlowmeterTypical MIG Process Control Settings Wire Size Amperage Range001 in = 1 ampere 125 in = 125 aHolding And Positioning Welding Gun Groove WeldsConditions That Affect Weld Bead Shape Push Perpendicular DragShort Normal Long Slow Normal FastGun Movement During Welding Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Troubleshooting − Excessive Spatter Troubleshooting − PorosityTroubleshooting − Excessive Penetration Possible Causes Corrective ActionsTroubleshooting − Burn-Through Troubleshooting − Lack Of PenetrationTroubleshooting − Incomplete Fusion Troubleshooting − Waviness Of Bead Troubleshooting − DistortionBase metal to move DirectionApplication Troubleshooting Guide For Semiautomatic Welding EquipmentCommon MIG Shielding Gases Welding arc not stable Wire slipping in drive rolls Readjust welding parametersWelding power source Drive rolls if necessary− ACCESSORIES/CONSUMABLES AccessoriesReplacement Drive Rolls ConsumablesAssistance ServiceSupport Contact your Distributor for Hobart Welding Products