Hobart Welding Products 250 Turn Off unit, and disconnect input power, Operation

Page 23

3-15. Installing Optional Spool Gun Switch In Welding Power Source

2 1

3

9

8

YTurn Off unit, and disconnect input power.

1Welding Power Source Center Baffle

2Switch Location

3Switch Mounting Plate

Remove 2 screws securing switch mounting plate to center baffle. Pull switch mounting plate to pull wiring harness through center baffle hole.

4 Plastic Plug

Remove and discard plastic plug from center hole in switch mounting plate panel.

5 Nylon Cable Tie

Cut and discard nylon cable tie.

6Jumper Plug

7Wiring Harness Switch Plug

Remove jumper plug from wiring harness switch plug. Retain jumper plug by placing looped lead over unit wiring harness.

8 Switch Plug

Connect switch plug to wiring har- ness switch plug.

9 Jam Nut

Remove top jam nut from switch (switch is equipped with two nuts, a jam nut and a backing nut).

Insert switch shaft through switch mounting plate. Switch should be positioned so lead with resistor is facing down.

7

3

5

Secure switch to plate with jam nut. Tighten jam nut enough to keep switch from rotating.

4

Tools Needed:

1/4 in

6

9/16 in

Push wiring harness back through hole, and reinstall switch mounting plate to center baffle.

Operation:

Place switch in On position for spool gun operation. Place switch in Off position for wire feeder/MIG (GMAW) gun operation.

When spool gun switch is in On position, spool gun wire feed speed is controlled by welding power source Wire Speed control.

802 936-A

OM-192 440 Page 19

Image 23

Contents File MIG Gmaw OM-192 440WProcesses 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 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 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 sécuritéOverheating SpecificationsWelding Power Source Duty Cycle And Overheating Exceeding duty cycle can damage unit and void warrantyDefinition Welding Gun Duty Cycle And OverheatingVolt-Ampere Curves Installing Welding Gun Installing Work Clamp Connecting To Weld Output TerminalsInstalling Wire Spool And Adjusting Hub Tension Setting Gun Polarity For Wire TypeRear Panel Installing Gas SupplyVolts Positioning Jumper LinksMin Grounding Conductor Size In AWG Electrical Service GuideHz Single Input VoltageSelecting a Location And Connecting Input Power Wood Threading Welding WireOperation Turn Off unit, and disconnect input powerTurn Off unit Connecting Spool Gun To Welding Power SourceControls − OperationWhile welding Voltage switch positionWeld Parameters Number on left of slash To read settingsExample 2/40 = Months Routine MaintenanceDisconnect power before maintaining Supplementary ProtectorsRemoving Knob From Front Panel Replacing Drive Roll And Wire Inlet GuideTurn Off power Replacing Gun Contact Tip Turn Off power before replacing contact tipWire size stamped on tip − check and match wire size Turn off welding power source/wire feederReplacing Switch And/Or Head Tube Welding Trouble Remedy Welding Troubleshooting TableWire Drive/Gun Troubleshooting Table Wire Drive/Gun Trouble RemedyTypical MIG Process Connections − MIG Welding Gmaw GuidelinesAmperage Typical MIG Process Control SettingsWire Size Amperage Range Thickness to Amperage aHolding And Positioning Welding Gun Conditions That Affect Weld Bead Shape Gun Movement During Welding Poor Weld Bead CharacteristicsGood Weld Bead Characteristics Possible Causes Corrective Actions Troubleshooting − Excessive SpatterTroubleshooting − Porosity Troubleshooting − Excessive PenetrationTroubleshooting − Burn-Through Troubleshooting − Lack Of PenetrationTroubleshooting − Incomplete Fusion Troubleshooting − Distortion Troubleshooting − Waviness Of BeadApplication Troubleshooting Guide For Semiautomatic Welding EquipmentWire does not feed Common MIG Shielding GasesWelding arc not stable Wire slipping in drive rolls OM-192 440 − Electrical Diagram − Parts List REGULATOR/FLOWMETER, 10−50 CFH ARGON/CO2 Center Baffle w/Components Center Baffle w/Components -1Item Rear Panel w/Components Front Panel w/Components M-25 Gun Description Remarks Optional Spool Gun SwitchPage Assistance ServiceSupport Hobart Welding Products Contact your Distributor for