Miller Electric 140, 180 Typical MIG Process Control Settings, Wire Recommendation Wire Speed

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8-2. Typical MIG Process Control Settings

NOTE

These settings are guidelines only. Material and wire type, joint design, fitup, position, shielding gas, etc. affect settings. Test welds to be sure they comply to specifications.

Material thickness determines weld

 

 

parameters.

1/8 or

Convert Material

 

.125 in

 

Thickness to

 

 

 

 

Amperage (A)

 

 

(.001 in = 1 ampere)

 

 

.125 in = 125 A

Wire Size

Amperage Range

.035 in

 

.023 in

30 − 90 A

.030 in

40 − 145 A

.035 in

50 − 180 A

 

Wire

Recommendation

 

Wire Speed

 

Size

 

(Approx.)

 

 

 

 

 

 

 

 

 

 

 

.023 in

3.5 in per ampere

3.5 x 125 A = 437 ipm

 

.030 in

2 in per ampere

2 x 125 A = 250 ipm

 

.035 in

1.6 in per ampere

1.6 x 125 A = 200 ipm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low voltage: wire stubs into work

High voltage: arc is unstable (spatter)

Set voltage midway between high/low voltage.

Select Wire Size

Select Wire Speed (Amperage)

125 A based on 1/8 in material thickness

ipm = inch per minute

Select Voltage

Wire speed (amperage) controls weld penetration

(wire speed = burn-off rate)

Voltage controls height and width of weld bead.

Ref. 804 681-A

OM-225 311 Page 45

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Contents Processes OM-225 311CDescription File MIG GmawFrom Miller to You Table of Contents − Parts List − Maintenance &TROUBLESHOOTINGMarks 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 EMF Information Principal Safety StandardsAbout Pacemakers LES Fumées ET LES GAZ peuvent être dangereux UNE Décharge Électrique peut entraîner la mortIndique un message de sécurité particulier 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 Principales normes de sécuritéSpecifications − SpecificationsVAC Model VAC Model w/Auto−SetE115 VAC Model Duty Cycle And Overheating230 VAC Model OverheatingAmperage Volt-Ampere CurvesInstalling Welding Gun − InstallationIncorrect Process/Polarity Table Work Cable Routing Inside UnitChanging Polarity Installing Gas Supply Required where gasoline or Special installation may beVolatile liquids are present − See NEC Article 511 or CECDo not move or operate unit where it could tip Installing Wire Spool And Adjusting Hub Tension Electrical Service Guide For 230 VAC ModelInput Voltage 230 Input Amperes At Rated Output Remove gun nozzle and contact tip Threading Welding WireCut Off End Of Wire Open Pressure Assembly Knob Removing MIG Gun From Welding Power SourceEnd Of Wire To Spool Operation Installing Optional Spool Gun Switch In Welding Power SourceConnecting Spool Gun To Millermatic 140/180 Controls For 115 VAC Model w/Auto-SetE − Operation115V Controls For 115 VAC Model230V Controls For 230 VAC ModelOM-225 311 Weld Parameter Chart For 115 VAC Model w/Auto−SetE 10/90 10/65 10/80 10/60 10/50 10/95 10/75 10/100 Aluminum 100% Argon 4043ER 030 0.8 mm 035 0.9 mm10/32 OM-225 311 10/90 10/45 10/60 10/30 10/32 10/80 035 0.9 mm 030 0.8 mm#220179 #202926 #220179Dcep Dcen 024 0.6 mm #220179 030 0.8 mm #202926 035 0.9 mm 045 1.2 mm 100 10/60 10/45 10/40 10/20 10/50Routine Maintenance − Maintenance &TROUBLESHOOTINGOverload Protection Drive Motor ProtectionTurn Off power before replacing contact tip Changing Drive Roll Or Wire Inlet GuideReplacing Gun Contact Tip Disconnect gun from unit Cleaning Or Replacing Gun LinerTo Reassemble Gun Replacing Switch And/Or Head Tube Trouble Remedy Troubleshooting TableOM-225 311 Circuit Diagram − Electrical Diagram234 419-B Typical MIG Process Connections − MIG Welding Gmaw GuidelinesWire Recommendation Wire Speed Typical MIG Process Control SettingsSelect Wire Size Select VoltageHolding And Positioning Welding Gun Conditions That Affect Weld Bead Shape Good Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Porosity Troubleshooting − Excessive SpatterPossible Causes Corrective Actions Troubleshooting − Lack Of Penetration Troubleshooting − Excessive PenetrationTroubleshooting − Incomplete Fusion Troubleshooting − Waviness Of Bead Troubleshooting − Burn-ThroughTroubleshooting − Distortion Application Common MIG Shielding GasesFlat & Horizontal1 Fillet Recommended Spare Parts − Parts ListOptional Drive Rolls OptionsPage Support ServiceMiller Electric Mfg. Co Owner’s Record
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