Hobart Welding Products 187 manual Typical MIG Process Control Settings, Wire Size Amperage Range

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9-2. Typical MIG Process Control Settings

.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 0.125 in.	Convert Material
	Thickness to
	Amperage (A)
	(0.001 in. = 1 ampere)
	0.125 in. = 125 A

.035 in

Wire Size	Amperage Range

0.023 in.		30 − 90 A
0.030 in.	40 − 145 A
0.035 in.	50 − 180 A

Select Wire Size

Wire

Recommendation

Wire Speed

Select Wire Speed

Size

(Approx.)

(Amperage)

0.023 in.

3.5 in. per ampere

3.5 x 125 A = 437 ipm

125 A based on 1/8 in.

0.030 in.

2 in. per ampere

2 x 125 A = 250 ipm

material thickness

0.035 in.

1.6 in. per ampere

1.6 x 125 A = 200 ipm

ipm = inches per minute

Low voltage: wire stubs into work

Select Voltage

High voltage: arc is unstable (spatter)

Set voltage midway between high/low voltage

Voltage controls height and

Wire speed (amperage) controls weld

width of weld bead.

penetration (wire speed = burn-off rate)

OM-228 187 Page 33

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Contents Processes OM-228 187BDescription 2010−01Protect Your Investment From Hobart to YouTable of Contents − Parts List Arc Welding Hazards Symbol UsageElectric Shock can kill HOT Parts can burnARC Rays can burn eyes and skin Fumes and Gases can be hazardousWelding can cause fire or explosion Flying Metal or Dirt can injure eyesFire or Explosion hazard Welding Wire can injureFalling Equipment can injure Moving Parts can injureCalifornia Proposition 65 Warnings Principal Safety StandardsEMF Information About Implanted Medical DevicesUNE Décharge Électrique peut entraîner la mort Symboles utilisésLES Fumées ET LES GAZ peuvent être dangereux LES Pièces Chaudes peuvent provoquer des brûluresLE Soudage peut provoquer un incendie ou une explosion LES Bouteilles peuvent exploser si elles sont endommagées LE Bruit peut endommager l’ouïeRisque D’INCENDIE OU LA Chute DE L’ÉQUIPEMENT peut provoquer des blessuresLes Pièces Mobiles peuvent causer des blessures Proposition californienne 65 AvertissementsLES 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-228 187 Symbols And Definitions − SpecificationsSpecifications − DefinitionsVolt-Ampere Curves Duty Cycle And OverheatingAmperes OutputInstalling Nozzle, Contact Tip, And Adapter − InstallationInstalling Welding Gun Installing Work Clamp Process/Polarity Table Turn off welding power sourceChanging Polarity Installing Gas Supply Selecting a Location And Connecting Input Power Installing Wire Spool And Adjusting Hub Tension Electrical Service GuideHold wire tightly to keep it from unraveling Threading Welding WireControls − OperationOM-228 187 CFH Weld Parameter Chart227010 Routine Maintenance − Maintenance & TroubleshootingOverload Protection Drive Motor ProtectionChanging Drive Roll Or Wire Inlet Guide Thread wire according to Replacing Switch And/Or Head Tube Trouble Remedy Troubleshooting TableOM-228 187 Circuit Diagram − Electrical Diagram228 180-A Typical MIG Process Connections − MIG Welding Gmaw GuidelinesWire Size Amperage Range Typical MIG Process Control SettingsSelect Voltage Groove Welds Holding And Positioning Welding GunConditions That Affect Weld Bead Shape Good Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Troubleshooting − Porosity Troubleshooting − Excessive SpatterTroubleshooting − Excessive Penetration Possible Causes Corrective ActionsTroubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Burn-Through Troubleshooting − Distortion Troubleshooting − Waviness Of BeadCommon MIG Shielding Gases Troubleshooting Guide For Semiautomatic Welding EquipmentApplication Welding arc not stable Wire slipping in drive rolls Main Assembly − Parts ListDia Part Description Quantity 228 245 H100S2-10 GunOptions Optional Drive RollsSupport ServiceAssistance Hobart Welding Products Contact your Distributor for