Hobart Welding Products OM-279 manual

AirForce 750 Processes Description Air Plasma Cutting and Gouging Air Plasma Cutter OM-279 180 060J April 1999[...]

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[...]

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

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OM-279 Page 1 SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING pom _nd_5/97 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 [...]

OM-279 Page 2 Sparks and hot metal blow out from the cutting arc. Chipping and grinding cause flying metal. FL YING SP ARKS can cause injury . D W ear approved face shield or safety goggles with side shields. D W ear proper body protection to protect skin. D Wear flame-resistant ear plugs or ear muf fs to prevent sparks from entering ears. Arc rays[...]

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[...]

OM-279 Page 4 1-5. EMF Information Considerations About W elding Or Cutting And The Effects Of Low Frequency Electric And Magnetic Fields W elding or cutting current, as it flows through the welding or cutting cables, will cause electromagnetic fields. There has been and still is some concern about such fields. However , after examining more than 5[...]

OM-279 Page 5 SECTION 1 – CONSIGNES DE S É CURIT É – LIRE A V ANT UTILISA TION pom_nd_fre_5/97 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[...]

OM-279 Page 6 D N ’ approchez pas le tube du chalumeau et l ’ arc pilote lorsque la g â chette est enfonc é e. D Le c â ble de masse doit ê tre pinc é correctement sur la pi è ce à couper , m é tal contre m é tal (et non de telle sorte qu ’ il puisse se d é tacher), ou sur la table de travail le plus pr è s possible de la ligne de [...]

OM-279 Page 7 1-3. Dangers suppl é mentaires en relation avec l ’ installation, le fonctionnement et la maintenance DES PIECES CHAUDES peuvent pro- voquer des br û lures graves. D Ne pas toucher des parties chaudes à mains nues. D Laisser refroidir avant d ’ intervenir sur la torche. DES ORGANES MOBILES peuvent provoquer des blessures. D S ?[...]

OM-279 Page 8 1-5. Information sur les champs é lectromagn é tiques Donn é es sur le soudage é lectrique et sur les effets, pour l ’ organisme, des champs magn é tiques basse fr é quence Le courant de soudage ou de coupage passant dans les c â bles de puis- sance c r é e des causera des champs é lectromagn é tiques. Il y a eu et il y a [...]

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*) [...]

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. ST-180 909 Cutting speed is approximately 10 inches per minute at 0.7 in mild [...]

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[...]

OM-279 Page 12 2-9. 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. ST-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. [...]

OM-279 Page 13 L1 (U) 2-10. 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 2-8. 7/16 in 1/2 in T ools Needed: 3 OR 2 2 L2 (V) L3 (W) L1 (U) L2 (V) Ref. ST-801 45[...]

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[...]

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[...]

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 ST-801 400-A Press trigger [...]

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[...]

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[...]

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[...]

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 2-8 and 2-10). Trouble lights not working. Have Factory Authorized Service Agent check safety control board PC1.[...]

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

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

OM-279 Page 23 Notes[...]

OM-279 Page 24 SECTION 6 – P ARTS LIST ST-801 499-D . 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 Figure 6-1. Main Assembly[...]

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [...]

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +195 835 P ANEL, front 1 . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

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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[...]

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[...]