Miller Electric XLT 185 warranty Process/Polarity Table, Changing Polarity

Page 17

5-3. Process/Polarity Table

Process	Polarity	Cable Connections
Process	Polarity
		Cable To Gun	Cable To Work

GMAW − Solid wire with shield-	DCEP − Reverse polarity	Connect to positive (+) out-	Connect to negative (−) output
ing gas		put terminal	terminal

FCAW − Self-shielding wire −	DCEN − Straight Polarity	Connect to negative (−)	Connect to positive (+) output
no shielding gas		output terminal	terminal

5-4. Changing Polarity

.Connection hardware must be tightened with proper tools. Do not just hand tighten hardware. A loose electrical connection will cause poor weld performance and excessive heating at the terminal block.

CHANGING

POLARITY

DCEN

Electrode negative for

flux cored wire

1

DCEP

Electrode positive for

solid wire

2

1Lead Connections For Direct Current Electrode Negative (DCEN)

2Lead Connections For Direct Current Electrode Positive (DCEP)

Always read and follow wire

manufacturer’s recommended polarity, and see Section 5-3.

Close door.

Ref. 209 228 / Ref. 209 229

OM-230 832 Page 13

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Contents OM-230 832A 2007−02 Processes Arc Welding Power Source and Wire FeederDescription Flux Cored Arc FcawPage Table of Contents Typical MIG Process Connections − Parts List− MIG Welding Gmaw Guidelines Marks a special safety message Symbol UsageArc Welding Hazards Electric Shock can killWelding can cause fire or explosion ARC Rays can burn eyes and skinFlying Metal can injure eyes Buildup of GAS can injure or killCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information Indique un message de sécurité particulier UNE Décharge Électrique peut entraîner la mortLES Fumées ET LES GAZ peuvent être dangereux DES Particules Volantes peuvent blesser les yeux LE Soudage peut provoquer un incendie ou une explosionDES Pièces Chaudes peuvent provoquer des brûlures graves LE Bruit peut endommager l’ouïeLA Chute DE L’APPAREIL peut blesser Risque D’INCENDIE OU D’EXPLO’EMPLOI Excessif peut SUR DES Organes Mobiles peuvent provoquer des blessuresEn ce qui concerne les stimulateurs cardiaques Boulevard, Rexdale, Ontario, Canada M9W 1R3 téléphoneSymbols And Definitions − SpecificationsSpecifications − DefinitionsVolt-Ampere Curves Duty Cycle And OverheatingAmperes OutputInstalling Welding Gun − InstallationClose door IncorrectInstalling Work Clamp Changing Polarity Process/Polarity TableTools Needed 1-1/8 Installing Gas SupplyAfter flow is set, close feedhead pressure assembly First, and never to a line ter- minal Selecting a Location And Connecting Input PowerTools Needed Electrical Service GuideInstalling Wire Spool And Adjusting Hub Tension Installing Contact Tip And Nozzle Threading Welding Wire Controls Wire Speed Control− Operation CFH Weld Parameter Chart For 230 VAC Model227010 Routine Maintenance − Maintenance &TROUBLESHOOTINGDisconnect power before maintaining Overload Protection Drive Motor ProtectionTurn Off power before replacing contact tip Changing Drive Roll Or Wire Inlet GuideReplacing Gun Contact Tip 030/.035 Groove Stamped 023/.025 Groove Stamped .030/.035Install gas diffuser, adapter, contact tip, and nozzle Cleaning Or Replacing Gun LinerDisconnect gun from unit To Reassemble GunReplacing Switch And/Or Head Tube Trouble Remedy Troubleshooting TableOM-230 832 Circuit Diagram − Electrical Diagram228 180-A − MIG Welding Gmaw Guidelines Regulator Flowmeter Wire Feeder Power Source ShieldingTypical MIG Process Connections GasWire Size Amperage Range Typical MIG Process Control SettingsThickness to Amperage a Select VoltageHolding And Positioning Welding Gun Push Conditions That Affect Weld Bead ShapePerpendicular Drag Short Normal LongGun Movement During Welding Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Troubleshooting − Porosity Troubleshooting − Excessive SpatterTroubleshooting − Excessive Penetration Possible Causes Corrective ActionsTroubleshooting − Burn-Through Troubleshooting − Lack Of PenetrationTroubleshooting − Incomplete Fusion Troubleshooting − Distortion Troubleshooting − Waviness Of BeadCommon MIG Shielding Gases Weld beadTroubleshooting Guide For Semiautomatic Welding Equipment OM-230 832 Main Assembly − Parts ListDia Part 228 195 H-10 GunOptions Optional Drive RollsPage Work like a Pro Warranty Owner’s Record