Hobart AirForce 750 Owner's Manual
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Hobart AirForce 750 Owner's Manual

Hobart AirForce 750 Owner's Manual

Air plasma cutter
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AirForce 750
OM-279
180 060P
August 2001
Processes
Air Plasma Cutting
and Gouging
Description
Air Plasma Cutter

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Summary of Contents for Hobart AirForce 750

  • Page 1 OM-279 180 060P August 2001 Processes Air Plasma Cutting and Gouging Description Air Plasma Cutter AirForce 750...
  • Page 2 We know you don’t have time to do it any other way. This Owner’s Manual is designed to help you get the most out of your Hobart products. Please take time to read the Safety precautions. They will help you...

  • Page 3: Table Of Contents

    TABLE OF CONTENTS SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING ......1-1. Symbol Usage .

  • Page 5: Section 1 - Safety Precautions - Read Before Using

    SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING pom _nd_9/98 1-1. Symbol Usage Means Warning! Watch Out! There are possible hazards with this procedure! The possible hazards are shown in the adjoining symbols. Y Marks a special safety message. This group of symbols means Warning! Watch Out! possible ELECTRIC SHOCK, MOVING PARTS, and HOT PARTS hazards.
  • Page 6 If inside, ventilate the area and/or use exhaust at the arc to remove EXPLODING PARTS can injure. cutting fumes and gases. If ventilation is poor, use an approved air-supplied respirator. D On inverter power sources, failed parts can ex- Read the Material Safety Data Sheets (MSDSs) and the manufac- plode or cause other parts to explode when turer’s instruction for metals to be cut, coatings, and cleaners.

  • Page 7: Additional Symbols For Installation, Operation, And Maintenance

    1-3. Additional Symbols For Installation, Operation, And Maintenance HOT PARTS can cause severe burns. FIRE OR EXPLOSION hazard. D Do not touch hot parts bare handed. D Do not locate unit on, over, or near combustible surfaces. D Allow cooling period before working on torch. D Do not install unit near flammables.

  • Page 8: Principal Safety Standards

    1-4. Principal Safety Standards Safety in Welding and Cutting, ANSI Standard Z49.1, from American Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1, Welding Society, 550 N.W. LeJeune Rd, Miami FL 33126 from Compressed Gas Association, 1235 Jefferson Davis Highway, Suite 501, Arlington, VA 22202.

  • Page 9: Section 1 - Consignes De Sécurité - Lire Avant Utilisation

    SECTION 1 – CONSIGNES DE SÉCURITÉ – LIRE AVANT UTILISATION pom_nd_fre_9/98 1-1. Signification des symboles Signifie Mise en garde ! Soyez vigilant ! Cette procédure présente des risques de danger ! Ceux-ci sont identifiés par des symboles adjacents aux directives. Y Identifie un message de sécurité...
  • Page 10 Isoler la pince de masse quand pas mis à la pièce pour éviter le Tableau 1. Protection des yeux pour le coupage au plasma d’arc contact avec tout objet métallique. Il y a DU COURANT CONTINU IMPORTANT dans Intensité de courant en ampères Filtre de teinte (minimum) les convertisseurs après la suppression de l’ali- Moins de 20...

  • Page 11: Dangers Supplémentaires En Relation Avec L'installation, Le Fonctionnement Et La Maintenance

    D Un contact électrique ne doit jamais se produire entre un chalumeau LES BOUTEILLES peuvent exploser de plasma d’arc et une bouteille. si elles sont endommagées. D Ne coupez jamais sur une bouteille pressurisée – une explosion en résulterait. Les bouteilles de gaz contiennent du gaz sous haute D Utilisez uniquement des bouteilles de gaz, des détendeurs, des pression.

  • Page 12: Principales Normes De Sécurité

    1-4. Principales normes de sécurité Safety in Welding and Cutting, norme ANSI Z49.1, de l’American Wel- Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1, ding Society, 550 N.W. Lejeune Rd, Miami FL 33126 de la Compressed Gas Association, 1235 Jefferson Davis Highway, Suite 501, Arlington, VA 22202.

  • Page 13: Section 2 - Installation

    SECTION 2 – INSTALLATION 2-1. Specifications Maximum Amperes Input at Rated Load Open- Rated Output 60 Hz Type of Plasma Rated Model Model Cutting Cutting Circuit Circuit Output Output Voltage Capacity 200 V 230 V 460 V 575 V Single- 42.30 36.80 18.40...

  • Page 14: Cutting Speed

    2-4. Cutting Speed The cutting speed curve shows the recommended maximum cutting speed capabilities of the power source and torch for mild steel of various thickness. Y Exceeding recommended cutting speeds will cause rapid erosion of the tip and electrode. Cutting speed is approximately 10 inches per minute at 0.7 in mild steel thickness at max set-...

  • Page 15: Connecting Gas/Air Supply

    2-6. Connecting Gas/Air Supply Unit Gas Fitting (Female 1/4 Use only clean and dry gas/air with 70 to 150 psi NPT) (483 to 1034 kPa) pressure. Quick Connect Gas Fitting Standard Gas Fitting Obtain and install desired fitting. Hose Obtain suitable hose according to installed fitting, and connect to fit- ting.

  • Page 16: Placing Jumper Links

    2-8. Placing Jumper Links Check input voltage available at site. Jumper Link Label Move jumper links to match input voltage and label on unit. Do not overtighten. Single-Phase Models 200 VOLTS 230 VOLTS 460 VOLTS S-083 566-C Three-Phase Models 230 Volts 460 Volts 575 Volts S-094 120-B...

  • Page 17: Connecting Input Power

    2-9. Connecting Input Power Strain Relief Clamp Route input and grounding conduc- tors through clamp to terminal board. Input And Grounding Three-Phase Connections Conductors Line Disconnect Device Select type and size of overcurrent protection using Section 2-7. Single-Phase Connections Three-Phase System Single-Phase System Y Always connect grounding conductor first.

  • Page 18: Section 3 - Operation

    SECTION 3 – OPERATION 3-1. Front Panel Controls Ref. 190 676 Pilot Arc Switch Saver position in most applications to length- Use Gas/Air Set area of control range for set- en the life of the torch and its consumables, ting gas/air pressure (see Section 3-2). Use switch to control pilot arc.

  • Page 19: Setting Gas/Air Pressure

    3-2. Setting Gas/Air Pressure Place controls in positions shown to adjust air pressure. Only gas/air cir- cuit is activated when the Power switch is turned On with Output Control in Gas/Air Set position. Pressure Gauge Pressure Adjustment Knob Lift knob and turn to adjust pres- sure.

  • Page 20: Sequence Of Operation

    3-3. Sequence Of Operation Do not clean torch by hitting it against a Inspect shield cup, tip, and electrode for hard surface. Hitting hard surfaces can wear before cutting or whenever cutting damage torch parts and stop proper opera- speed has been significantly reduced (see tion.

  • Page 21: Section 4 - Maintenance & Troubleshooting

    SECTION 4 – MAINTENANCE & TROUBLESHOOTING 4-1. Routine Maintenance Y Disconnect power Maintain more often before maintaining. during severe conditions. Each Use Check Torch Check Gas/Air Tip, Electrode, Pressure And Shield Cup Every Week Check Shield Cup Shutdown System 3 Months Service Air Replace Filter/Regulator...

  • Page 22: Trouble Lights

    4-2. Trouble Lights Pressure Light Lights if gas/air pressure is below 40 PSI (276 kPa). Difficulty establishing pilot arc may indicate consumables need to be cleaned or replaced. Turn power Off, and check for prop- er gas/air pressure (see Section 3-2).

  • Page 23: Troubleshooting

    4-4. Troubleshooting Trouble Remedy No pilot arc; difficulty in establishing an Clean or replace worn consumables as necessary (see torch Owner’s Manual). arc. Check for damaged torch or torch cable (see torch Owner’s Manual). Have Factory Authorized Service Agent check power switch S1, control relay CR1, CR5 and CR6, rectifi- er SR1 (and SR2 for single-phase models), safety control board PC1, power control boards PC2 and PC3, inductor L1, resistor R1, and check gas air system for leaks.
  • Page 24 Trouble Remedy Fan motor FM does not run; Power light Have Factory Authorized Service Agent check fan motor connections. and Ready light both On. Check input power, and check for proper input connections (see Sections 2-7 and 2-9). Trouble lights not working. Have Factory Authorized Service Agent check safety control board PC1.

  • Page 25: Section 5 - Electrical Diagrams

    SECTION 5 – ELECTRICAL DIAGRAMS 193 215 Figure 5-1. Circuit Diagram For 200/230/460 Volt Models OM-279 Page 21...
  • Page 26 194 148 Figure 5-2. Circuit Diagram For 230/460/575 Volt Models OM-279 Page 22...
  • Page 27 Notes OM-279 Page 23...

  • Page 28: Section 6 - Parts List

    SECTION 6 – PARTS LIST Hardware is common and not available unless listed. 12 13 801 499-J Figure 6-1. Main Assembly OM-279 Page 24...
  • Page 29 Item Dia. Part Mkgs. Description Quantity Figure 6-1. Main Assembly ....178 158 PANEL, side LH ...........
  • Page 30 Item Dia. Part Mkgs. Description Quantity Figure 6-1. Main Assembly (Continued) ......PANEL, front (consisting of) .
  • Page 31 1-877-HOBART1 HSW-25 spot welder models effective with Serial No. KK200262 and newer. for your local This limited warranty supersedes all previous Hobart warranties and is exclusive with Hobart distributor. no other guarantees or warranties expressed or implied. Hobart products are serviced by Hobart or Miller Authorized Service Agencies.

  • Page 32: Options And Accessories

    Welding Process Handbooks Call 1-877-Hobart1 Contact the Delivering Carrier for: File a claim for loss or damage during shipment. For assistance in filing or settling claims, contact your distributor and/or equipment manufacturer’s Transportation Department. PRINTED IN USA 2000 Hobart Welding Products. 1/00...

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