Hobart 125 EZ, H-9B Typical Control Settings, Thickness to Amperage a, Wire Size Amperage Range

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8-2. Typical Control Settings

NOTE

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

Material thickness determines weld parameters.

1/8 or 0.125 inConvert 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	Recommendation		(Approx.)				(Amperage)
		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
									ipm = inches per minute



			Low voltage: wire stubs into work						Select Voltage
			High voltage: arc is unstable (spatter)						Select Voltage
			High voltage: arc is unstable (spatter)
		Set voltage midway between high/low voltage

Metal thickness select will control both voltage and wire feed speed by selecting metal thickness.

Ref. 804 121-C

OM-923 Page 27

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Contents File Flux Cored Fcaw OM-923Processes DescriptionFrom Hobart to You Table of Contents Warranty Electric Shock can kill Symbol UsageMarks a special safety message Arc Welding HazardsBuildup of GAS can injure or kill ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal can injure eyesCalifornia 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 Pièces Chaudes peuvent provoquer des brûlures graves LE Soudage peut provoquer unIncendie ou une explosion DES Particules Volantes peuvent blesser les yeuxDES Organes Mobiles peuvent provoquer des blessures Risque D’INCENDIE OU D’EXPLOLA Chute DE L’APPAREIL peut blesser ’EMPLOI Excessif peut SUREn ce qui concerne les stimulateurs cardiaques Principales normes de sécuritéSpecifications − SpecificationsDuty Cycle And Overheating Volt-Ampere Curves Polarity − InstallationInstalling Work Clamp Process/Polarity TableInstalling 4 in 102 mm Wire Spool Installing Wire Spool And Adjusting Hub TensionDo not move or operate unit where it could tip Turn off welding power source Installing Contact Tip And NozzleInput Power Threading Welding WireControls − OperationOperating The Gun Drive Motor Protection − Maintenance &TROUBLESHOOTINGRoutine Maintenance Overload ProtectionSlide replacement wire guide into Changing Drive Roll Or Wire Inlet GuideReplacing Gun Contact Tip Cleaning Gun Liner Replacing Gun Liner End of wire at spool13/16 in 21 mm Trouble Remedy Troubleshooting TableDoes not run Circuit Diagram − Electrical DiagramTypical Fcaw Process Connections − Wire Welding GuidelinesAmperage Typical Control SettingsWire Size Amperage Range Thickness to Amperage aHolding And Positioning Welding Gun Conditions That Affect Weld Bead Shape Good Weld Bead Characteristics Poor Weld Bead CharacteristicsGun Movement During Welding Possible Causes Corrective Actions Troubleshooting − Excessive SpatterTroubleshooting − Porosity Troubleshooting − Excessive PenetrationTroubleshooting − Incomplete Fusion Troubleshooting − Lack Of PenetrationTroubleshooting − Burn-Through Wire does not feed Troubleshooting − Waviness Of BeadTroubleshooting − Distortion Troubleshooting Guide For Semiautomatic Welding EquipmentMain Assembly − Parts ListDia Part Description Quantity Pkg 225209 Wire Drive AssemblyPage Support ServiceAssistance Hobart Welding Products Contact your Distributor for