Manual Hobart 750

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  • Hobart 750 - page 1

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

  • Hobart 750 - page 2

    Hobart W elders manufactures a full line of welders and welding related equipment. For information on other quality Hobart products, contact your local Hobart distributor to receive the latest full line catalog or individual catalog sheets. T o locate your nearest distributor or service agency call 1-877-Hobart1. Thank you and congratulations on ch ...

  • Hobart 750 - page 3

    T ABLE OF CONTENTS SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1. Symbol Usage 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2. Plasma Arc Cutting Hazards 1 . . . . . . . . . . . . . . . . . . . . ...

  • Hobart 750 - page 4

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  • Hobart 750 - page 5

    OM-279 Page 1 SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING pom _nd_9/98 1-1. Symbol Usage Means W arning! W atch Out! There are possible hazards with this procedure! The possible hazards are shown in the adjoining symbols. Y Marks a special safety message. . Means “Note”; not safety related. This group of symbols means W arning! W atch ...

  • Hobart 750 - page 6

    OM-279 Page 2 D On inverter power sources, failed parts can ex- plode or cause other parts to explode when power is applied. Always wear a face shield and long sleeves when servicing inverters. EXPLODING P ARTS can injure. Sparks and hot metal blow out from the cutting arc. Chipping and grinding cause flying metal. FL YING SP ARKS can cause injury ...

  • Hobart 750 - page 7

    OM-279 Page 3 1-3. Additional Symbols For Installation, Operation, And Maintenance HOT P ARTS can cause severe burns. D Do not touch hot parts bare handed. D Allow cooling period before working on torch. MOVING P ARTS can cause injury . D Keep away from moving parts such as fans. D Keep all doors, panels, covers, and guards closed and securely in p ...

  • Hobart 750 - page 8

    OM-279 Page 4 1-4. Principal Safety Standards Safety in Welding and Cutting , ANSI Standard Z49.1, from American W elding Society , 550 N.W . LeJeune Rd, Miami FL 33126 Safety and Health Standards , OSHA 29 CFR 1910, from Superinten- dent o f Documents, U.S. Government Printing Of fice, Washington, D.C. 20402. Recommended Practices for Plasma Arc C ...

  • Hobart 750 - page 9

    OM-279 Page 5 SECTION 1 – CONSIGNES DE S É CURIT É – LIRE A V ANT UTILISA TION pom_nd_fre_9/98 1-1. Signification des symboles Signifie Mise en garde ! Soyez vigilant ! Cette proc é dure pr é sente des risques de danger ! Ceux-ci sont identifi é s par des symboles adjacents aux directives. Y Identifie un message de s é curit é particulie ...

  • Hobart 750 - page 10

    OM-279 Page 6 D Isoler la pince de masse quand pas mis à la pi è ce pour é viter le contact avec tout objet m é tallique. Il y a DU COURANT CONTINU IMPORT ANT dans les convertisseurs apr è s la suppression de l ’ ali- mentation é lectrique. D Arr ê ter les convertisseurs, d é brancher le courant é lectrique, et d é - charger les condens ...

  • Hobart 750 - page 11

    OM-279 Page 7 Les bouteilles de gaz contiennent du gaz sous haute pression. Si une bouteille est endommag é e, elle peut exploser . Puisque les bouteilles de gaz font habituellement partie d ’ un processus de travail des m é taux, assurez – vous de les manipuler correctement. LES BOUTEILLES peuvent exploser si elles sont endommag é es. D Pro ...

  • Hobart 750 - page 12

    OM-279 Page 8 1-4. Principales normes de s é curit é Safety in W elding and Cutting, norme ANSI Z49.1, de l ’ American W el - ding Society , 550 N.W . Lejeune Rd, Miami FL 33126 Safety and Health Sandards, OSHA 29 CFR 1910, du Superintendent of Documents, U.S. Government Printing Of fice, Washington, D.C. 20402. Recommended Safe Practice for th ...

  • Hobart 750 - page 13

    OM-279 Page 9 SECTION 2 – INST ALLA TION 2-1. Specifications Model Amperes Input at Rated Load Output 60 Hz T ype of Plasma Rated Rated Cutting Maximum Open- Circuit Model 200 V 230 V 460 V 575 V KV A KW Output Gas Output Cutting Capacity Circuit V oltage DC Single- Phase 42.30 (3.40*) 36.80 (2.95*) 18.40 (1.50*) –– 8.49 (0.68*) 6.55 (0.20*) ...

  • Hobart 750 - page 14

    OM-279 Page 10 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. 180 909 Cutting speed is approximately 10 inches per minute at 0.7 in mild ste ...

  • Hobart 750 - page 15

    OM-279 Page 1 1 2-6. Connecting Gas/Air Supply 1 Unit Gas Fitting (Female 1/4 NPT) 2 Quick Connect Gas Fitting 3 Standard Gas Fitting Obtain and install desired fitting. 4 Hose Obtain suitable hose according to installed fitting, and connect to fit- ting. Route hose to gas/air supply . Adjust gas/air pressure according to Section 3-2. Y Incorrect p ...

  • Hobart 750 - page 16

    OM-279 Page 12 2-8. Placing Jumper Links Check input voltage available at site. 1 Jumper Link Label Move jumper links to match input voltage and label on unit. Ref. 801 455 S-094 120-B 230 V olts 460 V olts 575 V olts L1 L2 L3 L1 L2 L3 L1 L2 L3 3/8 in T ools Nee d e d : 230 VOL TS 460 VOL TS 200 VOL TS S-083 566-C LL LL LL 1 Do not overtighten. Sin ...

  • Hobart 750 - page 17

    OM-279 Page 13 L1 (U) 2-9. Connecting Input Power 1 Strain Relief Clamp Route input and grounding conduc- tors through clamp to terminal board. 2 Input And Grounding Conductors 3 Line Disconnect Device Select type and size of overcurrent protection using Section 2-7. 7/16 in 1/2 in T ools Needed: 3 OR 2 2 L2 (V) L3 (W) L1 (U) L2 (V) Ref. 801 455 / ...

  • Hobart 750 - page 18

    OM-279 Page 14 SECTION 3 – OPERA TION 3-1. Front Panel Controls 1 Pilot Arc Switch Use switch to control pilot arc. Place switch in Expanded Metal position for continuous pilot arc. Use while cutting ex- panded metals only . . The Expanded Metal position keeps the pilot arc in the circuit at all times. Life of consumables will be significantly re ...

  • Hobart 750 - page 19

    OM-279 Page 15 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. 1 Pressure Gauge 2 Pressure Adjustment Knob Lift knob and turn to adjust pres- sure. Push knob down to lock in set- ting. Place out ...

  • Hobart 750 - page 20

    OM-279 Page 16 3-3. Sequence Of Operation Put On Personal Safety Equipment After cutting arc starts, slowly start moving torch across metal. Adjust torch speed so sparks go thru metal and out bottom of cut. Pause briefly at end of cut before releasing trigger . Install & Connect Equipment EXAMPLE Of Cutting Operation 801 400-A Press trigger . P ...

  • Hobart 750 - page 21

    OM-279 Page 17 SECTION 4 – MAINTENANCE & TROUBLESHOOTING 4-1. Routine Maintenance Y Disconnect power before maintaining. . Maintain more often during severe conditions. Each Use Check T orch T ip, Electrode, And Shield Cup Check Gas/Air Pressure Every Week Check Shield Cup Shutdown System 3 Months Service A i r Filter/Regulator Assembly Filte ...

  • Hobart 750 - page 22

    OM-279 Page 18 4-2. T rouble Lights 1 Pressure Light Lights if gas/air pressure is below 40 PSI (276 kPa). Tur n power Of f, and check for prop- er gas/air pressure (see Section 3-2). 2 Cup Light Lights if shield cup is loose. T urn power Of f, and check shield cup connection (see torch Owner ’ s Manual). Power must be reset whenever the cup shut ...

  • Hobart 750 - page 23

    OM-279 Page 19 4-4. T roubleshooting T rouble Remedy No pilot arc; dif ficulty in establishing an arc. Clean or replace worn consumables as necessary (see torch Owner ’ s Manual). 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, rect ...

  • Hobart 750 - page 24

    OM-279 Page 20 T rouble Remedy Fan motor FM does not run; Power light and Ready light both On. Have Factory Authorized Service Agent check fan motor connections. 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. ...

  • Hobart 750 - page 25

    OM-279 Page 21 SECTION 5 – ELECTRICAL DIAGRAMS 193 215 Figure 5-1. Circuit Diagram For 200/230/460 V olt Models ...

  • Hobart 750 - page 26

    OM-279 Page 22 194 148 Figure 5-2. Circuit Diagram For 230/460/575 V olt Models ...

  • Hobart 750 - page 27

    OM-279 Page 23 Notes ...

  • Hobart 750 - page 28

    OM-279 Page 24 SECTION 6 – P ARTS LIST 801 499-J . Hardware is common and not available unless listed. 1 2 3 4 5 6 7 8 9 10 15 11 12 16 8 18 19 20 21 22 23 24 25 26 27 28 29 30 25 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 17 11 12 13 14 50 51 52 Figure 6-1. Main Assembly ...

  • Hobart 750 - page 29

    OM-279 Page 25 Description Part No. Dia. Mkgs. Item No. Figure 6-1. Main Assembly Quantity 1 178 158 P ANEL, side LH 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 026 947 ST AND-OFF , insul 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Hobart 750 - page 30

    OM-279 Page 26 Description Part No. Dia. Mkgs. Item No. Figure 6-1. Main Assembly (Continued) Quantity 45 P ANEL, front (consisting of) 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +206 446 P ANEL, front 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • Hobart 750 - page 31

    Warranty Questions? Call 1-877-HOBART1 for your local Hobart distributor. hobart retail 4/00 Service Y o u always get the fast, reliable response you need. Most replacement parts can be in your hands in 24 hours. Support Need fast answers to the tough welding questions? Contact your distributor or call 1-800-332-3281. The expertise of the distribut ...

  • Hobart 750 - page 32

    PRINTED IN USA  2000 Hobart Welding Products. 1/00 Hoba rt We lding Pr oducts An I l li noi s T ool W orks Company 600 West M ain Street Troy , OH 45373 US A For Technical Assi stance: Call1-800-332-3281 For Lit erat ure Or Neares t Deal er: Call 1-877-Hobart 1 Model Name Serial/Style Number Purchase Date (Date which equipment was delivered to o ...

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All of them are important, but the most important information from the point of view of use of the device are in the user manual Hobart 750.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Hobart 750, service manual, brief instructions and user manuals Hobart 750. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Hobart 750.

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A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Hobart 750 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Hobart 750.

A complete Hobart manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

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2. Contents - index of all tips concerning the Hobart 750, that we can find in the current document
3. Tips how to use the basic functions of the device Hobart 750 - which should help us in our first steps of using Hobart 750
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Hobart 750
5. FAQ - Frequently Asked Questions
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