Hobart Welding Products OM-949

OM-949 Page 18

SECTION 6 − ELECTRICAL DIAGRAMS

215 254-A

Figure 6-1. Circuit Diagram

Contents

Main From Hobart to You TABLE OF CONTENTS Page SECTION 1 SAFETY PRECAUTIONS - READ BEFORE USING 1-1. Symbol Usage . 1-2. Arc Welding Hazards ELECTRIC SHOCK can kill. ARC RAYS can burn eyes and skin. WELDING can cause fire or explosion. FLYING METAL can injure eyes. BUILDUP OF GAS can injure or kill. HOT PARTS can cause severe burns. 1-3. Additional Symbols For Installation, Operation, And Maintenance FIRE OR EXPLOSION hazard. FALLING UNIT can cause injury. OVERUSE can cause OVERHEATING STATIC (ESD) can damage PC boards. 1-5. Principal Safety Standards 1-6. EMF Information SECTION 2 CONSIGNES DE SCURIT LIRE AVANT UTILISATION 2-1. Symboles utiliss . 2-2. Dangers relatifs au soudage la rc UNE DCHARGE LECTRIQUE peut entraner la mort. LES RAYONS DARC peuvent entra- ner des brlures aux yeux et la peau. LE SOUDAGE peut provoquer un incendie ou une explosion. DES PARTICULES VOLANTES peuvent blesser les yeux. LES ACCUMULATIONS DE GAZ risquent de provoquer des blessures ou mme la mort. DES PICES CHAUDES peuvent provoquer des brlures graves. 2-3. Dangers supplmentaires en relation avec linstallation, le fonctionnement et la maintenance Risque DINCENDIE OU DEXPLO- SION. LA CHUTE DE LAPPAREIL peut blesser. LEMPLOI EXCESSIF peut SUR- CHAUFFER LQUIPEMENT. LES CHARGES LECTROSTATIQUES peuvent endommager les circuits imprims. 2-5. Principales normes de scurit 2-6. Information EMF SECTION 3 INSTALLATION 3-1. Specifications Output Amperage % Duty Cycle 3-2. Duty Cycle Charts 3-3. Volt-Ampere Curves Volts Amps 230 Volt Model 3-4. Selecting A Location 3-5. Installing Electrode Holder And Work Clamp PIECE 3-6. Weld Output Cables Notes 3-7. Electrical Service Guide 3-8. Connecting Input Power 1 Page SECTION 5 MAINTENANCE & TROUBLESHOOTING 5-1. Routine Maintenance 3 Months 6 Months 12 Months 5-2. Lubricating Shunt Block And Anti-Noise Adjustment 5-3. Reinstalling Amperage Adjustment Indicator 5-4. Troubleshooting Trouble Remedy Page SECTION 7 WELDING METHODS & TROUBLESHOOTING A. Welding Methods 7-1. Shielded Metal Arc Welding (SMAW) Procedure 7-2. Electrode And Amperage Selection Chart 400 350 300 250 7-3. Striking An Arc 7-4. Positioning The Electrode Holder 7-5. Weld Bead Characteristics 7-6. Conditions That Affect Weld Bead Shape 7-7. Electrode Movement During Welding . 7-8. Butt Joints 7-9. Lap Joints 7-10. Tee Joints 7-11. Welding Troubleshooting Table 6-1. Porosity Table 6-2. Excessive Spatter Table 6-3. Incomplete Fusion Table 6-4. Lack Of Penetration Table 6-5. Excessive Penetration Table 6-6. Burn-Through Table 6-7. Waviness Of Bead Table 6-8. Distortion Page SECTION 8 PARTS LIST Figure 8.1. Main Assembly . Page Page Warranty Questions? Call 1-800-332-3281 7 AM 6 PM EST Effective January 1, 2005 * Original Main Power Rectifiers * Transformers * Stabilizers * Reactors Please complete and retain with your personal records. Resources Available Always provide Model Name and Serial/Style Number. Owners Record Protect Your Investment! Register your product at: HobartWelders.com