Instruction Manual equipment/prest-o...1. Remove all combustible materials well away from the work...

Prest-O-Lite®380 Plasma Cutter P/N 0558006057 - 230 V, 1-Phase, 50/60 Hz

Form No: 0558006081 03 / 2007

Prest-O-Lite®380 Plasma Cutter

Instruction ManualInstallation, Operation and Service

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These INSTRUCTIONS are for experienced operators. If you are not fully familiar with the principles of opera-tion and safe practices for arc welding and cutting equipment, we urge you to read our booklet, "Precautions and Safe Practices for Arc Welding, Cutting, and Gouging," Form 52-529. Do NOT permit untrained persons to install, operate, or maintain this equipment. Do NOT attempt to install or operate this equipment until you have read and fully understand these instructions. If you do not fully understand these instructions, contact your supplier for further information. Be sure to read the Safety Precautions before installing or operating this equipment.

Be SURe ThIS INFORmATION ReACheS The OPeRATOR.YOU CAN GeT exTRA COPIeS ThROUGh YOUR SUPPlIeR.

USeR ReSPONSIBIlITY

This equipment will perform in conformity with the description thereof contained in this manual and accompanying labels and/or inserts when installed, operated, maintained and repaired in accordance with the instructions provided. This equipment must be checked periodically. Malfunctioning or poorly maintained equipment should not be used. Parts that are broken, missing, worn, distorted or contaminated should be replaced immediately. Should such repair or replacement become necessary, the manufacturer recommends that a telephone or written request for service advice be made to the Authorized Distributor from whom it was purchased.

This equipment or any of its parts should not be altered without the prior written approval of the manufacturer. The user of this equipment shall have the sole responsibility for any malfunction which results from improper use, faulty maintenance, damage, improper repair or alteration by anyone other than the manufacturer or a service facility designated by the manufacturer.

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TABle OF CONTeNTS

SeCTION TITle PAGe PARAGRAPh

SeCTION 1 DeSCRIPTION ............................................................................................................. 11 1.1 General .......................................................................................................................... 11 1.2 Scope ............................................................................................................................. 11 1.3 System Available ........................................................................................................ 11 1.4 Specifications .............................................................................................................. 12 1.5 PT-31XL Torch Technical Data ................................................................................ 14 SeCTION 2 INSTAllATION........................................................................................................... 15 2.1 General .......................................................................................................................... 15 2.2 Equipment Required ................................................................................................ 15 2.3 Location ........................................................................................................................ 15 2.4 Inspection ..................................................................................................................... 15 2.5 Primary Electrical Input Connections ................................................................. 15 2.6 Secondary (Output) Connections ........................................................................ 17 2.6.1 Torch Replacement ................................................................................................... 17 2.6.2 Air Connection ............................................................................................................ 17 2.6.3 Work Lead Connection ............................................................................................ 17 2.7 PT-31XL Torch Consumables Installation .......................................................... 20

SeCTION 3 OPeRATION ................................................................................................................ 21 3.1 Operation ..................................................................................................................... 22 3.2 Prest-O-Lite® 380 Controls....................................................................................... 22 3.3 Assembling PT-31XL Consumable Parts ............................................................ 23 3.4 Cutting with the PT-31XL ........................................................................................ 23 3.5 Operating Techniques .............................................................................................. 25 3.6 Common Cutting Problems ................................................................................... 25

SeCTION 4 mAINTeNANCe ......................................................................................................... 27 4.1 General .......................................................................................................................... 27 4.2 Inspection and Cleaning ......................................................................................... 27 4.3 Flow Switch .................................................................................................................. 27 4.4 PT-31XL Torch Maintenance .................................................................................. 28 4.5 Power Cable And Switch Disassembly Sequence .......................................... 29

SeCTION 5 TROUBleShOOTING .............................................................................................. 31 5.1 Troubleshooting ........................................................................................................ 31 5.2 Troubleshooting Guide ........................................................................................... 31 5.3 Sequence of Operation ........................................................................................... 36

SeCTION 6 RePlACemeNT PARTS ........................................................................................... 37 6.1 General .......................................................................................................................... 37 6.2 Ordering ........................................................................................................................ 37

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TABle OF CONTeNTS

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WARNING: These Safety Precautions are for your protection. They summarize precautionary infor-mation from the references listed in Additional Safety Information section. Before performing any

installation or operating procedures, be sure to read and follow the safety precautions listed below as well as all other manuals, material safety data sheets, labels, etc. Failure to observe Safety Precautions can result in injury or death.

PROTeCT YOURSelF AND OTheRS -- Some welding, cutting, and gouging processes are noisy and re-quire ear protection. The arc, like the sun, emits ultraviolet (UV) and other radiation and can injure skin and eyes. hot metal can cause burns. Training in the proper

use of the processes and equipment is essential to prevent accidents. Therefore:

1. Always wear safety glasses with side shields in any work area, even if welding helmets, face shields, and goggles are also required.

2. Use a face shield fitted with the correct filter and cover plates to protect your eyes, face, neck, and ears from sparks and rays of the arc when operating or observing operations. Warn by-standers not to watch the arc and not to expose themselves to the rays of the electric-arc or hot metal.

3. Wear flameproof gauntlet type gloves, heavy long-sleeve shirt, cuffless trousers, high-topped shoes, and a welding helmet or cap for hair protection, to protect against arc rays and hot sparks or hot metal. A flameproof apron may also be desirable as protection against radiated heat and sparks.

4. Hot sparks or metal can lodge in rolled up sleeves, trouser cuffs, or pockets. Sleeves and collars should be kept buttoned, and open pockets eliminated from the front of clothing

5. Protect other personnel from arc rays and hot sparks with a suitable non-flammable partition or curtains.

6. Use goggles over safety glasses when chipping slag or grind-ing. Chipped slag may be hot and can fly far. Bystanders should also wear goggles over safety glasses.

FIReS AND exPlOSIONS -- heat from flames and arcs can start fires. hot slag or sparks can also cause fires and explo-sions. Therefore:

1. Remove all combustible materials well away from the work area or cover the materials with a protective non-flammable covering. Combustible materials include wood, cloth, sawdust, liquid and gas fuels, solvents,

paints and coatings, paper, etc.2. Hot sparks or hot metal can fall through cracks or crevices in

floors or wall openings and cause a hidden smoldering fire or fires on the floor below. Make certain that such openings are protected from hot sparks and metal.“

3. Do not weld, cut or perform other hot work until the workpiece has been completely cleaned so that there are no substances on the workpiece which might produce flammable or toxic vapors. Do not do hot work on closed containers. They may explode.

4. Have fire extinguishing equipment handy for instant use, such as a garden hose, water pail, sand bucket, or portable fire extinguisher. Be sure you are trained in its use.

5. Do not use equipment beyond its ratings. For example, over-loaded welding cable can overheat and create a fire hazard.

6. After completing operations, inspect the work area to make certain there are no hot sparks or hot metal which could cause a later fire. Use fire watchers when necessary.

7. For additional information, refer to NFPA Standard 51B, "Fire Prevention in Use of Cutting and Welding Processes", available

from the National Fire Protection Association, Batterymarch Park, Quincy, MA 02269.

eleCTRICAl ShOCK -- Contact with live electrical parts and ground can cause severe injury or death. DO NOT use AC welding current in damp areas, if movement is confined, or if there is danger of falling.

1. Be sure the power source frame (chassis) is connected to the ground system of the input power.

2. Connect the workpiece to a good electrical ground. 3. Connect the work cable to the workpiece. A poor or missing

connection can expose you or others to a fatal shock.

4. Use well-maintained equipment. Replace worn or damaged cables.

5. Keep everything dry, including cloth-ing, work area, cables, torch/electrode holder, and power source.

6. Make sure that all parts of your body are insulated from work and from ground.

7. Do not stand directly on metal or the earth while working in tight quarters or a damp area; stand on dry boards or an insulating platform and wear rubber-soled shoes.

8. Put on dry, hole-free gloves before turning on the power. 9. Turn off the power before removing your gloves. 10. Refer to ANSI/ASC Standard Z49.1 (listed on next page) for

specific grounding recommendations. Do not mistake the work lead for a ground cable.

eleCTRIC AND mAGNeTIC FIelDS — may be dangerous. elec-tric current flowing through any conductor causes localized electric and magnetic Fields (emF). Welding and cutting current creates emF around welding cables and welding machines. Therefore:

1. Welders having pacemakers should consult their physician before welding. EMF may interfere with some pacemakers.

2. Exposure to EMF may have other health effects which are unknown.

3. Welders should use the following procedures to minimize exposure to EMF:

A. Route the electrode and work cables together. Secure them with tape when possible.

B. Never coil the torch or work cable around your body.

C. Do not place your body between the torch and work cables. Route cables on the same side of your body.

D. Connect the work cable to the workpiece as close as possible to the area being welded.

E. Keep welding power source and cables as far away from your body as possible.

SAFeTY PReCAUTIONS

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FUmeS AND GASeS -- Fumes and gases, can cause discomfort or harm, particu-larly in confined spaces. Do not breathe fumes and gases. Shielding gases can cause asphyxiation. Therefore:

1. Always provide adequate ventilation in the work area by natural or mechanical means. Do not weld, cut, or gouge on materials such as galvanized steel, stainless steel, copper, zinc, lead, beryllium, or cadmium unless positive mechani-cal ventilation is provided. Do not breathe fumes from these materials.

2. Do not operate near degreasing and spraying operations. The heat or arc rays can react with chlorinated hydrocarbon vapors to form phosgene, a highly toxic gas, and other irritant gases.

3. If you develop momentary eye, nose, or throat irritation while operating, this is an indication that ventilation is not adequate. Stop work and take necessary steps to improve ventilation in the work area. Do not continue to operate if physical discomfort persists.

4. Refer to ANSI/ASC Standard Z49.1 (see listing below) for specific ventilation recommendations.

5. WARNING: This product, when used for welding or cut-ting, produces fumes or gases which contain chemicals known to the State of California to cause birth defects and, in some cases, cancer. (California health & Safety Code

§25249.5 et seq.)

CYlINDeR hANDlING -- Cylinders, if mis-handled, can rupture and violently release gas. Sudden rupture of cylinder, valve, or relief device can injure or kill. Therefore:

1. Use the proper gas for the process and use the proper pressure reducing regula-tor designed to operate from the compressed

gas cylinder. Do not use adaptors. Maintain hoses and fittings in good condition. Follow manufacturer's operating instruc-tions for mounting regulator to a compressed gas cylinder.

2. Always secure cylinders in an upright position by chain or strap to suitable hand trucks, undercarriages, benches, walls, post, or racks. Never secure cylinders to work tables or fixtures where they may become part of an electrical circuit.

3. When not in use, keep cylinder valves closed. Have valve pro-tection cap in place if regulator is not connected. Secure and move cylinders by using suitable hand trucks. Avoid rough handling of cylinders.

4. Locate cylinders away from heat, sparks, and flames. Never strike an arc on a cylinder.

5. For additional information, refer to CGA Standard P-1, "Precau-tions for Safe Handling of Compressed Gases in Cylinders", which is available from Compressed Gas Association, 1235 Jefferson Davis Highway, Arlington, VA 22202.

eQUIPmeNT mAINTeNANCe -- Faulty or improperly main-tained equipment can cause injury or death. Therefore:

1. Always have qualified personnel perform the installation,

troubleshooting, and maintenance work. Do not perform any electrical work unless you are quali-fied to perform such work.2. Before performing any maintenance work inside a power source, disconnect the power

source from the incoming electrical power.3. Maintain cables, grounding wire, connections, power cord,

and power supply in safe working order. Do not operate any equipment in faulty condition.

4. Do not abuse any equipment or accessories. Keep equipment away from heat sources such as furnaces, wet conditions such as water puddles, oil or grease, corrosive atmospheres and inclement weather.

5. Keep all safety devices and cabinet covers in position and in good repair.

6. Use equipment only for its intended purpose. Do not modify it in any manner.

ADDITIONAl SAFeTY INFORmATION -- For more informa-tion on safe practices for electric arc welding and cutting equipment, ask your supplier for a copy of "Precautions and Safe Practices for Arc Welding, Cutting and Gouging", Form 52-529.

The following publications, which are available from the American Welding Society, 550 N.W. LeJuene Road, Miami, FL 33126, are recommended to you:1. ANSI/ASC Z49.1 - "Safety in Welding and Cutting"2. AWS C5.1 - "Recommended Practices for

Plasma Arc Welding"3. AWS C5.2 - "Recommended Practices for Plasma Arc Cut-

ting"4. AWS C5.3 - "Recommended Practices for Air Carbon Arc Goug-

ing and Cutting"5. AWS C5.5 - "Recommended Practices for Gas Tungsten Arc

Welding“6. AWS C5.6 - "Recommended Practices for Gas Metal Arc Weld-

ing"“7. AWS SP - "Safe Practices" - Reprint, Welding Handbook.8. ANSI/AWS F4.1, "Recommended Safe Practices for Welding

and Cutting of Containers That Have Held Hazardous Sub-stances."

meANING OF SYmBOlS - As used throughout this manual: means Attention! Be Alert! Your safety is involved.

means immediate hazards which, if not avoided, will result in immediate, serious personal injury or loss of life.

means potential hazards which could result in personal injury or loss of life.

means hazards which could result in minor personal injury.

SAFeTY PReCAUTIONS

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ADVeRTeNCIA: Estas Precauciones de Seguridad son para su protección. Ellas hacen resumen de información proveniente de las referencias listadas en la sección

"Información Adicional Sobre La Seguridad". Antes de hacer cualquier instalación o procedimiento de operación , asegúrese de leer y seguir las precauciones de seguridad listadas a continuación así como también todo manual, hoja de datos de seguridad del material, calcomanias, etc. El no observar las Precauciones de Seguridad puede resultar en daño a la persona o muerte.

PROTeJASe USTeD Y A lOS DemAS-- Algunos pro-cesos de soldadura, corte y ranurado son ruidosos y requiren protección para los oídos. el arco, como el sol , emite rayos ultravioleta (UV) y otras radiacio-nes que pueden dañar la piel y los ojos. el metal caliente causa quemaduras. el entrenamiento en

el uso propio de los equipos y sus procesos es esencial para prevenir accidentes. Por lo tanto:

1. Utilice gafas de seguridad con protección a los lados siempre que esté en el área de trabajo, aún cuando esté usando careta de soldar, protector para su cara u otro tipo de protección.

2. Use una careta que tenga el filtro correcto y lente para proteger sus ojos, cara, cuello, y oídos de las chispas y rayos del arco cuando se esté operando y observando las operaciones. Alerte a todas las personas cercanas de no mirar el arco y no exponerse a los rayos del arco eléctrico o el metal fundido.

3. Use guantes de cuero a prueba de fuego, camisa pesada de mangas largas, pantalón de ruedo liso, zapato alto al tobillo, y careta de soldar con capucha para el pelo, para proteger el cuerpo de los rayos y chispas calientes provenientes del metal fundido. En ocaciones un delantal a prueba de fuego es necesario para protegerse del calor radiado y las chispas.

4. Chispas y partículas de metal caliente puede alojarse en las mangas enrolladas de la camisa , el ruedo del pantalón o los bolsillos. Mangas y cuellos deberán mantenerse abotonados, bolsillos al frente de la camisa deberán ser cerrados o eliminados.

5. Proteja a otras personas de los rayos del arco y chispas calientes con una cortina adecuada no-flamable como división.

6. Use careta protectora además de sus gafas de seguridad cuando esté removiendo escoria o puliendo. La escoria puede estar caliente y desprenderse con velocidad. Personas cercanas deberán usar gafas de seguridad y careta protectora.

FUeGO Y exPlOSIONeS -- el calor de las flamas y el arco pu-eden ocacionar fuegos. escoria caliente y las chispas pueden causar fuegos y explosiones. Por lo tanto:

1. Remueva todo material combustible lejos del área de trabajo o cubra los materiales con una cobija a prueba de fuego. Materiales combustibles incluyen

madera, ropa, líquidos y gases flamables, solventes, pinturas, papel, etc.

2. Chispas y partículas de metal pueden introducirse en las grietas y agujeros de pisos y paredes causando fuegos escondidos en otros niveles o espacios. Asegúrese de que toda grieta y agujero esté cubierto para proteger lugares adyacentes contra fuegos.

3. No corte, suelde o haga cualquier otro trabajo relacionado hasta que la pieza de trabajo esté totalmente limpia y libre de substancias que puedan producir gases inflamables o vapores tóxicos. No trabaje dentro o fuera de contenedores o tanques cerrados. Estos pueden explotar si contienen vapores inflamables.

4. Tenga siempre a la mano equipo extintor de fuego para uso instantáneo, como por ejemplo una manguera con agua, cubeta con agua, cubeta con arena, o extintor portátil. Asegúrese que usted esta entrenado para su uso.

5. No use el equipo fuera de su rango de operación. Por ejemplo, el calor causado por cable sobrecarga en los cables de soldar pueden ocasionar un fuego.

6. Después de termirar la operación del equipo, inspeccione el área de trabajo para cerciorarse de que las chispas o metal caliente ocasionen un fuego más tarde. Tenga personal asignado para vigilar si es necesario.

7. Para información adicional , haga referencia a la publicación NFPA Standard 51B, "Fire Prevention in Use of Cutting and Welding Processes", disponible a través de la National Fire Protection Association, Battery-march Park, Quincy, MA 02269.

ChOQUe eleCTRICO -- el contacto con las partes eléctricas energizadas y tierra puede causar daño severo o muerte. NO use soldadura de corriente alterna (AC) en áreas húmedas, de movimiento confinado en lugares estrechos o si hay

posibilidad de caer al suelo.

1. Asegúrese de que el chasis de la fuente de poder esté conectado a tierra através del sistema de electricidad primario. 2. Conecte la pieza de trabajo a un buen sistema de tierra física. 3. Conecte el cable de retorno a la pieza de

trabajo. Cables y conductores expuestos o con malas conexiones pueden exponer al operador u otras personas a un choque eléctrico fatal.

4. Use el equipo solamente si está en buenas condiciones. Reemplaze cables rotos, dañados o con conductores expuestos.

5. Mantenga todo seco, incluyendo su ropa, el área de trabajo, los cables, antorchas, pinza del electrodo, y la fuente de poder.

6. Asegúrese que todas las partes de su cuerpo están insuladas de ambos, la pieza de trabajo y tierra.

7. No se pare directamente sobre metal o tierra mientras trabaja en lugares estrechos o áreas húmedas; trabaje sobre un pedazo de madera seco o una plataforma insulada y use zapatos con suela de goma.

8. Use guantes secos y sin agujeros antes de energizar el equipo. 9. Apage el equipo antes de quitarse sus guantes. 10. Use como referencia la publicación ANSI/ASC Standard Z49.1 (listado

en la próxima página) para recomendaciones específicas de como conectar el equipo a tierra. No confunda el cable de soldar a la pieza de trabajo con el cable a tierra.

CAmPOS eleCTRICOS Y mAGNeTICOS - Son peligrosos. la corriente eléctrica fluye através de cualquier conductor cau-sando a nivel local Campos eléctricos y magnéticos (emF). las corrientes en el área de corte y soldadura, crean emF alrrededor de los cables de soldar y las maquinas. Por lo tanto:

1. Soldadores u Operadores que use marca-pasos para el corazón deberán consultar a su médico antes de soldar. El Campo Electromagnético (EMF) puede interferir con algunos marca-pasos.2. Exponerse a campos electromagnéticos (EMF) puede causar otros efectos de salud aún desconocidos.3. Los soldadores deberán usar los siguientes proced-imientos para minimizar exponerse al EMF:

A. Mantenga el electrodo y el cable a la pieza de trabajo juntos, hasta llegar a la pieza que usted quiere soldar. Asegúrelos uno junto al otro con cinta adhesiva cuando sea posible.

B. Nunca envuelva los cables de soldar alrededor de su cuerpo. C. Nunca ubique su cuerpo entre la antorcha y el cable, a la pieza de

trabajo. Mantega los cables a un sólo lado de su cuerpo. D. Conecte el cable de trabajo a la pieza de trabajo lo más cercano

posible al área de la soldadura. E. Mantenga la fuente de poder y los cables de soldar lo más lejos

posible de su cuerpo.

PReCAUCION De SeGURIDAD

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hUmO Y GASeS -- el humo y los gases, pueden causar malestar o daño, particularmente en espacios sin ven-tilación. No inhale el humo o gases. el gas de protección puede causar falta de oxígeno.

Por lo tanto:

1. Siempre provea ventilación adecuada en el área de trabajo por medio natural o mecánico. No solde, corte, o ranure materiales con hierro galvanizado, acero in-oxidable, cobre, zinc, plomo, berílio, o cadmio a menos que provea ventilación mecánica positiva . No respire los gases producidos por estos materiales.

2. No opere cerca de lugares donde se aplique substancias quími-cas en aerosol. El calor de los rayos del arco pueden reaccionar con los vapores de hidrocarburo clorinado para formar un fosfógeno, o gas tóxico, y otros irritant es.

3. Si momentáneamente desarrolla inrritación de ojos, nariz o garganta mientras est á operando, es indicación de que la ventilación no es apropiada. Pare de trabajar y tome las medidas necesarias para mejorar la ventilación en el área de trabajo. No continúe operando si el malestar físico per-siste.

4. Haga referencia a la publicación ANSI/ASC Standard Z49.1 (Vea la lista a continuación) para recomendaciones específicas en la ventilación.

5. ADVeRTeNCIA-- este producto cuando se utiliza para sol-daduras o cortes, produce humos o gases, los cuales contienen químicos conocidos por el estado de California de causar defectos en el nacimiento, o en algunos casos, Cancer. (California health

& Safety Code §25249.5 et seq.)

mANeJO De CIlINDROS-- los cilindros, si no son manejados correctamente, pu-eden romperse y liberar violentamente gases. Rotura repentina del cilindro, vál-vula, o válvula de escape puede causar daño o muerte. Por lo tanto:

1. Utilize el gas apropiado para el proceso y utilize un regu-lador diseñado para operar y reducir la presión del cilindro de gas . No utilice adaptadores. Mantenga las mangueras y las conexiones en buenas condiciones. Observe las instrucciones de operación del manufacturero para montar el regulador en el cilindro de gas comprimido.

2. Asegure siempre los cilindros en posición vertical y amárrelos con una correa o cadena adecuada para asegurar el cilindro al carro, transportes, tablilleros, paredes, postes, o armazón. Nunca asegure los cilindros a la mesa de trabajo o las piezas que son parte del circuito de soldadura . Este puede ser parte del circuito elélectrico.

3. Cuando el cilindro no está en uso, mantenga la válvula del cilindro cerrada. Ponga el capote de protección sobre la válvula si el regulador no está conectado. Asegure y mueva los cilindros utilizando un carro o transporte adecuado. Evite el manejo brusco de los

Las siguientes publicaciones, disponibles através de la American Welding Society, 550 N.W. LeJuene Road, Miami, FL 33126, son recomendadas para usted:1. ANSI/ASC Z49.1 - "Safety in Welding and Cutting"2. AWS C5.1 - "Recommended Practices for Plasma Arc Welding"3. AWS C5.2 - "Recommended Practices for Plasma Arc Cutting"4. AWS C5.3 - "Recommended Practices for Air Carbon Arc Gouging

and Cutting"5. AWS C5.5 - "Recommended Practices for Gas Tungsten Arc Weld-

ing“6. AWS C5.6 - "Recommended Practices for Gas Metal Arc Weld-

ing"“7. AWS SP - "Safe Practices" - Reprint, Welding Handbook.8. ANSI/AWS F4.1, "Recommended Safe Practices for Welding and

Cutting of Containers That Have Held Hazardous Substances."

Significa riesgo inmediato que, de no ser evadido, puede resultar inmediatamente en serio daño personal o la muerte.

Significa el riesgo de un peligro potencial que puede resultar en serio daño personal o la muerte.

Significa el posible riesgo que puede resultar en menores daños a la persona.

mANTeNImIeNTO Del eQUIPO -- equipo defec-tuoso o mal mantenido puede causar daño o muerte. Por lo tanto:

1. Siempre tenga personal cualificado para efectuar l a insta-lación, diagnóstico, y mantenimiento del equipo. No ejecute ningún trabajo eléctrico a menos que usted esté cualificado para hacer el trabajo.

2. Antes de dar mantenimiento en el interior de la fuente de poder, desconecte la fuente de poder del suministro de electricidad primaria.

3. Mantenga los cables, cable a tierra, conexciones, cable pri-mario, y cualquier otra fuente de poder en buen estado operacional. No opere ningún equipo en malas condicio-nes.

4. No abuse del equipo y sus accesorios. Mantenga el equipo lejos de cosas que generen calor como hornos, también lugares húmedos como charcos de agua , aceite o grasa, atmósferas corrosivas y las inclemencias del tiempo.

5. Mantenga todos los artículos de seguridad y coverturas del equipo en su posición y en buenas condiciones.

6. Use el equipo sólo para el propósito que fue diseñado. No modifique el equipo en ninguna manera.

INFORmACION ADICIONAl De SeGURIDAD -- Para más información sobre las prácticas de seguridad de los equipos de arco eléctrico para soldar y cortar, pregunte a su suplidor por una copia de "Precautions and Safe Practices for Arc Welding, Cutting and Goug-ing-Form 52-529.

SIGNIFICADO De lOS SImBOlOS -- Según usted avanza en la lectura de este folleto: los Símbolos Significan ¡Atención! ¡esté Alerta! Se trata de su seguridad.

PReCAUCION De SeGURIDAD

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ment le bois, les vêtements, la sciure, l’essence, le kérosène, les peintures, les solvants, le gaz naturel, l’acétylène, le propane et autres substances combustibles semblables.

b. Les étincelles ou les projections de métal incandescent peuvent tomber dans des fissures du plancher ou dans des ouvertures des murs et y déclencher une ignition lente cachée. Veiller à protéger ces ouvertures des étincelles et des projections de métal.

c. N’exécutez pas de soudures, de coupes, d’opérations de gougeage ou autres travaux à chaud à la surface de barils, bidons, réservoirs ou autres contenants usagés, avant de les avoir nettoyés de toute trace de substance susceptible de produire des vapeurs inflammables ou toxiques.

d. En vue d’assurer la prévention des incendies, il convient de disposer d’un matériel d’extinction prêt à servir immédiate-ment, tel qu’un tuyau d’arrosage, un seau à eau, un seau de sable ou un extincteur portatif.

e. Une fois le travail à l’arc terminé, inspectez le secteur de façon à vous assurer qu’aucune étincelle ou projection de métal incandescent ne risque de provoquer ultérieurement un feu.

3. CHOC éLECTRIQUE-- Le gougeage à l’arc et à l’arc au plasma exige l’emploi de tensions à vide relativement importantes; or, celles-ci risquent de causer des dommages corporels graves et même mortels en cas d’utilisation inadéquate. La gravité du choc électrique reçu dépend du chemin suivi par le courant à travers le corps humain et de son intensité.

a. Ne laissez jamais de surfaces métalliques sous tension venir au contact direct de la peau ou de vêtements humides. Veillez à porter des gants bien secs.

b. Si vous devez effectuer un travail sur une surface métallique ou dans un secteur humide, veillez à assu-rer votre isolation corporelle en portant des gants secs et des chaussures à semelles de caoutchouc et en vous tenant sur une planche ou une plate-forme sèche.

c. Mettez toujours à la terre le poste de soudage/coupage en le reliant par un câble à une bonne prise de terre.

d. N’utilisez jamais de câbles usés ou endommagés. Ne surchargez jamais le câble. Utilisez toujours un équipement correctement entretenu.

e. Mettez l’équipement hors tension lorsqu’il n’est pas en service. une mise à la masse accidentelle peut en effet provoquer une surchauffe de l’équipement et un danger d’incendie. Ne pas enrouler ou passer le câble autour d’une partie quelconque du corps.

f. Vérifiez si le câble de masse est bien relié à la pièce en un point aussi proche que possible de la zone de travail. Le branche-ment des câbles de masse à l’ossature du bâtiment ou en un point éloigné de la zone de travail augmente en effet le risque de passage d’un courant de sortie par des chaînes de

AVERTISSEMENT: Ces règles de sécurité ont pour objet d’ as-surer votre protection. Veillez à lire et à observer les précautions énoncées ci-dessous avant de monter l’ équipement ou de commercer à l’utiliser. Tout défaut d’observation de ces précau-tions risque d’entraîner des blessures graves ou mortelles.

1. PROTECTION INDIVIDUELLE-- Les brûlures de la peau et des yeux dues au rayonnement de l’arc électrique ou du métal incandescent, lors du soudage au plasma ou à l’électrode ou lors du gougeage à l’arc, peuvent s’avérer plus graves que celles résultant d’une exposition prolongée au soleil. Aussi convient-il d’observer les précautions suivantes:

a. Portez un écran facial adéquat muni des plaques protectrices et des verres filtrants appropriés afin de vous protéger les yeux, le visage, le cou et les oreilles des étincelles et du rayonnement de l’arc électrique lorsque vous effectuez des soudures ou des coupes ou lorsque vous en observez l’exécution.

AVERTISSEZ les personnes se trouvant à proximité de façon à ce qu’elles ne regardent pas l’arc et à ce qu’elles ne s’exposent pas à son rayonnement, ni à celui du métal incandescent.

b. Portez des gants ignifugés à crispins, une tunique épaisse à manches longues, des pantalons sans rebord, des chaussures à embout d’acier et un casque de soudage ou une calotte de protection, afin d’éviter d’exposer la peau au rayonnement de l’arc électrique ou du métal incan-descent. ll est également souhaitable d’utiliser un tablier ininflammable de façon à se protéger des étincelles et du rayonnement thermique.

c. Les étincelles ou les projections de métal incandescent ris-quent de se loger dans des manches retroussées, des bords relevés de pantalons ou dans des poches. Aussi convient-il de garder boutonnés le col et les manches et de porter des vêtements sans poches à l’avant.

d. Protégez des étincelles et du rayonnement de l’arc électrique les autres personnes travaillant à proximité à l’aide d’un écran ininflammable adéquat.

e. Ne jamais omettre de porter des lunettes de sécurité lorsque vous vous trouvez dans un secteur où l’on effectue des opérations de soudage ou de coupage à l’arc. Utilisez des lunettes de sécurité à écrans ou verres latéraux pour piquer ou meûler le laitier. Les piquetures incandescentes de laitier peuvent être projetées à des distances considérables. Les personnes se trouvant à proximité doivent également porter des lunettes de protection.

f. Le gougeage à l’arc et le soudage à l’arc au plasma produisent un niveau de bruit extrêmement élevé (de 100 à 114 dB) et exigent par conséquent l’emploi de dispositifs appropriés de protection auditive.

2 PRéVeNTION DeS INCeNDeS-- Les projections de laitier incandescent ou d’étincelles peuvent provoquer de graves incendies au contact de matériaux combustibles solides, liquides ou gazeux. Aussi faut-il observer les précautions suivantes:

a. éloigner suffisamment tous les matériaux combustibles du secteur où l’on exécute des soudures ou des coupes à l’arc, à moins de les recouvrir complètement d’une bâche non-inflammable. Ce type de matériaux comprend notam-

PRéCAUTIONS De SéCURITé

10

levage, des câbles de grue ou divers chemins élec-triques.

g. Empêchez l’apparition de toute humidité, notamment sur vos vêtements, à la surface de l’emplacement de travail, des câbles, du porte-électrode et du poste de soudage/coup-age. Réparez immédiatement toute fuite d’eau.

4. VENTILATION-- La respiration prolongée des fumées résul-tant des opérations de soudage/coupage, à l’intérieur, d’un local clos, peut provoquer des malaises et des dommages corporels. Aussi convient-il d’observer les précautions suivantes:

a. Assurez en permanence une aération adéquate de l’emplacement de travail en maintenant une ventilation naturelle ou à l’aide de moyens mécaniques. N’effectuez jamais de travaux de soudage ou de coupage sur des ma-tériaux de zinc, de plomb, de beryllium ou de cadmium en l’absence de moyens mécaniques de ventilation capables d’empêcher l’inhalation des fumées dégagées par ces matériaux.

b. N’effectuez jamais de travaux de soudage ou de coupage à proximité de vapeurs d’hydrocarbure chloré résultant d’opérations voisines de dégraissage ou de pulvérisa-tion. La chaleur dégagée ou le rayonnement de l’arc peut déclencher la formation de phosgène -- gaz particulière-ment toxique -- et d’autres gaz irritants, à partir des vapeurs de solvant.

c. Une irritation momentanée des yeux, du nez ou de la gorge constatée au cours de l’utilisation de l’équipement dénote un défaut de ventilation. Arrêtez-vous de travailler afin de prendre les mesures néces- saires à l’amélioration de la ventilation. Ne poursuivez pas l’opération entreprise si le malaise persiste.

d. Certaines commandes comportent des canalisations où circule de l’hydrogène. L’armoire de commande est munie d’un ventilateur destiné à empêcher la forma-tion de poches d’hydrogène, lesquelles présentent un danger d’explosion; ce ventilateur ne fonctionne que si l’interrupteur correspondant du panneau avant se trouve placé en position ON (Marche). Veillez à manœuvrer cette commande en vérifiant si le couvercle est bien en place, de façon à assurer l’efficacité de la ventilation ainsi réalisée. Ne jamais débrancher le ventilateur.

e. Les fumées produites par l’opération de soudage ou de coupage peuvent s’avérer toxiques. Aussi est-il nécessaire de disposer en permanence d’un dispositif adéquat de ventilation de type aspirant, afin d’élimi-ner du voisinage de l’opérateur tout dégagement de fumée visible.

f. Consultez les recommandations particulières en matière de ventilation indiquées à l’alinéa 6 de la norme Z49.1 de l’AWS.

5. ENTRETIEN DE L’éQUIPEMENT-- Un équipement entretenu de façon défectueuse ou inadéquate risque non seulement de réaliser un travail de mauvaise qualité mais, chose plus grave encore, d’entraîner des dommages corporels graves, voire mortels en déclenchant des incendies ou des chocs électriques. Observez par conséquent les précautions suivantes:

a. Efforcez-vous de toujours confier à un personnel qua-lifié l’installation, le dépannage et l’entretien du poste de soud-age et de coupage. N’effectuez aucune réparation électrique sur l’équipement à moins d’être qua-lifié à cet effet.

b. Ne procédez jamais à une tâche d’entretien quelconque à l’intérieur du poste de soudage/coupage, avant d’avoir débranché l’alimentation électrique.

c. Maintenez en bon état de fonctionnement les câbles, le câble de masse, les branchements, le cordon d’alimentation et le poste de soudage/coupage. N’utilisez jamais le poste ou l’équipement s’il présente une défectuosité quelconque.

d. Prenez soin du poste de soudage et de coupage et des équipements accessoires. Gardez-les à l’écart des sources de charleur, notamment des fours, de l’humidité, des flaques d’eau maintenez-les à l’abri des traces d’huile ou de graisse, des atmosphères corrosives et des intempéries.

e. Laissez en place tous les dispositifs de sécurité et tous les panneaux de l’armoire de commande en veillant à les garder en bon état.

f. Utilisez le poste de soudage/coupage conformément à son usage prévu et n’effectuez aucune modification.

6. INFORMATIONS COMPLéMENTAIRES RELATIVES à LA Sé-CURITé--

Pour obtenir des informations complémentaires sur les règles de sécurité à observer pour le montage et l’utilisation d’équipements de soudage et de coupage électriques et sur les méthodes de travail recommandées, demandez un exemplaire du livret N° 52529 “Precautions and Safe Practices for Arc Welding, Cutting and Gouging” publié par Prest-O-Lite. Nous conseillons également de consulter les publications sui-vantes, tenues à votre disposition par l’American Welding Society, 550 N.W. LeJuene Road, Miami, FL 32126:

a. “Safety in Welding and Cutting” AWS Z49.1b. “Recommended Safe Practices for Gas-Shielded Arc Welding

“AWS A6. 1.c. “Safe Practices for Welding and Cutting Containers That Have

Held Combustibles” AWS-A6.0.d. “Recommended Safe Practices for Plasma Arc Cutting”

AWS-A6. 3.e. “Recommended Safe Practices for Plasma Arc Welding”

AWS-C5. 1.f. “Recommended Safe Practices for Air Carbon Arc Gouging

and Cutting” AWS-C5. 3.g. “Code For Safety in Welding and Cutting” CSA-Standard

W117. 2.

PRéCAUTIONS De SéCURITé

11

1.1 GeNeRAl

The Prest-O-Lite® 380 is a compact, completely self-contained plasma Cutter. As shipped, the system is fully assembled and ready to cut after being connected to input power and a source of prefiltered compressed air (90-150 psi). The Prest-O-Lite® 380 system uses the PT-31XL torch to deliver cutting power for cutting materials up to 3/8 inch thick or for severing up to 1/2 inch thick.

Do not use any torch with this power source other than the Prest-O-lite brand PT-31xl torch. Serious injury may occur if used with any other torch.

1.2 SCOPe

The purpose of this manual is to provide the operator with all the information required to install and operate the Prest-O-Lite® 380 Plasma™ Cutter. Technical reference material is also provided to assist in troubleshooting the Cutter.

1.3 SYSTem AVAIlABle

Prest-O-Lite®380 Plasma Cutter ....................................................................................................................... P/N 0558006057

includes: Console with Regulator and Work Cable, PT-31XL Torch, 15 ft. (4.6m) Torch Cable and Spare Parts Kit

SeCTION 1 DeSCRIPTION

The patented PT-31XL is a manual torch with a 75° head designed for use with several plasma arc cutting packages using clean, dry air as the plasma gas. The torch service line is 15 ft. (4.6m) long and is rated at 100% duty cycle for any output level of the Prest-O-Lite® 380.

Optional Torch Guide Kit (0558003258) permits cutting accurate circles from 1.8 inches to 41.3 inches (45mm to 1050mm) in diameter with a manual torch. The attachment includes a head and radius bar assembly, center-point / adap-tor, and dual swivel castor assembly. Cuts can be made inside or outside the circle. The torch head is always held vertical during the cutting operation. The attachment is also handy for maintaining a constant standoff in other types of cutting.

12

RatedOutput

35% Duty Cycle* 30 A @ 92 V dc



Output Current Range 15 to 30 Amperes

Open Circuit Voltage 270 V dc Nominal

Rated Primary Input @30 A @ 92 VDC Output

208/230 VAC, 50/60 Hz, 1-Phase

19/18 A

Power Factor @ 30 Amperes Output 81% (1-Phase)

Current Capacity PT-31XL 50 A DCSP

Air Requirements PT-31XL 250 cfh @ 80 psi

Dimensions of Handy Plasma 380LengthHeightWidth

17.75-in. ( 450.8 mm)11.12-in. (282.6 mm)5.75-in. (146.1 mm)

Description Part Number Quantity

Spare Parts Kit P/N 0558006146 includes: 30/40 A Nozzle 0558006187 3

Electrode 0558006190 2

Swirl Baffle 0558006189 1

Heat Shield 0558006185 1

Lubricant, 1/4 oz. 17672 1

NOTE: PT-31XL Torch Assembly P/N 0558004482 is supplied with the nozzle, electrode, swirl baffle, and heat shield assembled as part of the Prest-O-Lite® 380 system.


*Duty cycle is based on a 10-minute period; therefore, a 40% duty cycle means the machine may operate for 4 minutes with a cool down period of 6 minutes; a 60% duty cycle means the machine may operate for 6 minutes with a cool down period of 4 minutes; a 100% duty cycle means the machine may operate continuously.

Table 1-2 Prest-O-lite® 380 Specifications

1.4 SPeCIFICATIONS

Refer to Tables 1-2, 1-3, and Figures 1-1 and 1-2 for Prest-O-Lite® 380 technical specifications.

Table 1-1 PT-31xl Spare Parts Kit Contents

Torch Current Capacity

Minimum Air Supply Requirements

13


Figure 1-2. PT-31xl Cutting Performance

2 1/

4"(5

7mm

)

5 1/4"(133mm)

75° Torch

Table 1-3 PT-31xl Torch Specifications

PT-31xl TorchCurrent Capacity ...........................................................50A DCSPShipping Wgt. .....................................................1.5 lbs (0.68 kg)Length of Service Lines .........................................15 ft. (4.6 m)

Figure 1-1. PT-31xl DimensionsPT-31XL Torch Assembly P/N 0558004482 is supplied with the nozzle, electrode, swirl baffle, and heat shield as-sembled.

14


15

SeCTION 2 INSTAllATION

2.5 PRImARY eleCTRICAl INPUT CONNeCTIONS

eleCTRIC ShOCK CAN KIll! Precautionary measures should be taken to provide maximum protection against electrical shock. Be sure that all power is off by opening the line (wall) disconnect switch and by unplugging the power cord to the unit when connections are made inside of the power source.

Be sure that the power source is properly configured for your input power supply. DO NOT connect a power source configured for 208/230 V to a 460 V input power supply. Damage to the machine may occur.

The Prest-O-Lite® 380 power source operates on 230 VAC, 1-phase input power and is equipped with a 8-ft, 3-conduc-tor cable. The customer is responsible for supplying a plug with a NEMA 6-30 rating minimum ir desired.

The chassis must be connected to an approved electrical ground. Failure to do so may result in electrical shock, severe burns or death.

2.1 GeNeRAl

Proper installation will insure satisfactory and trouble-free operation of the Prest-O-Lite® 380 cutting package. It is suggested that each step in this section be studied care-fully and followed.

2.2 eQUIPmeNT ReQUIReD

A source of clean, prefiltered dry air that supplies 250 cfh at 80 psig is required for the cutting operation. The air supply should not exceed 150 psig (the maximum inlet pressure rat-ing of the air filter-regulator supplied with the package).

2.3 lOCATION

Adequate ventilation is necessary to provide proper cooling of the Prest-O-Lite® 380 and the amount of dirt, dust, and excessive heat to which the equipment is exposed, should be minimized. There should be at least one foot of clear-ance between the Prest-O-Lite® 380 power source and wall or any other obstruction to allow freedom of air movement through the power source.

Installing or placing any type of filtering device will restrict the volume of intake air, thereby subjecting the power source internal components to overheating. The warranty is void if any type of filter device is used.

2.4 INSPeCTION

A. Remove the shipping container and all packing ma-terial and inspect for evidence of concealed damage which may not have been apparent upon receipt of the Prest-O-Lite® 380. Notify the carrier of any defects or damage at once.

B. Check container for any loose parts prior to disposing of shipping materials.

A line (wall) disconnect switch, with proper sized fuse or circuit breaker (see Table 2.1), should be provided at the main power panel.

C. Check air louvers and any other openings to ensure that any obstruction is removed.

Table 2.1. Recommended Sizes for Input Conductors and line Fuses

Rated Input Input & GND Fuse Size Conductor AmpsVolts Amp Phases CU/AWG*

208 19 1 No. 10 30230 18 1 No. 10 30

* Sized per National Code for 80°C rated copper conductors @ 30°C ambient. Not more than three conductors in raceway or cable. Local codes should be followed if they specify sizes other than those listed above.

16


Figure 2-1 Prest-O-lite® 380 Primary Interconnection Diagram

CUSTOMER FUSED LINE DISCONNECT SWITCH

See Table 2.1

PLUG (customer supplied)NEMA 6-30 rating minimum

RECEPTACLE - NEMA 6-30 rating minimum(Receptacle to match plug)

Prefiltered AIR SUPPLY (Customer Supplied)(90 to 150 psig max)

*

* (See Table 2.1 and WARNINGin regards to chassis groundin Section 2.5.)

2.5 PRImARY eleCTRICAl INPUT CONNeCTIONS

17


Torch comes factory installed. These instructions are for torch replacement.

Before making any connections to the power source output terminals, make sure that all primary input power to the power source is deenergized (off) at the main disconnect switch and that the input power cable is unplugged. For operator safety, the torch connections are loaded.

front

rear

Torch Connection

Figure 2-2. Torch Connection

2.6 SeCONDARY (OUTPUT) CONNeCTIONS

1. Connect your air supply to the inlet connection of the filter-regulator. See Figure 2-1.

2. Thread the power cable and switch lead of the PT-31XL through the lower left side bushing of the front panel. Connect power cable to the torch fitting (left-hand threads) and connect torch trigger switch leads to pins 1 and 2 of white plug located in the lower right corner of machine. Make sure the power cable connection is wrench-tight.

3. Replace the machine cover panel.

1. Remove the machine cover panel. The torch connection is located on the lower side of machine. See Figure 2-2 below.

2.6.1 Torch Replacement

2.6.2 Air Connection

1. Clamp the work cable to the workpiece. Be sure the workpiece is connected to an approved earth ground with a properly sized ground cable. See Figures 2-3, 2-4 and 2-5.

2.6.3 Work lead Connection

18


WORK CABLE

SAFETYGROUND

PT-31XL

WORK

between work and power source

Allow at least 10 ft (3 m)

Figure 2-3 Prest-O-lite® 380 Secondary Interconnection Diagram


19


WORK CABLE

EARTH GROUND

DO NOT ATTACH WORK CABLE TO PIECE BEING CUT FREE

GROUNDEDWORK TABLE

EARTH GROUND

WORK CABLE

BE SURE WORK IS IN GOODCONTACT WITH TABLE.

Figure 2-4 Secondary (Output) Connections

Figure 2-5 Secondary (Output) Connections


20


Follow all safety instructions included in this manual. DO NOT install or attempt to operate this torch without following these safety instructions.

! WARNING

Be SURe to install the swirl baffle in the torch. Failure to do so would allow the nozzle (tip) to contact the electrode. This contact would permit high volt-age to be applied to the nozzle. Your contact with the nozzle or workpiece could then result in serious injury or death by electric shock.

The PT-31xl torch head contains a gas flow check valve that acts in conjunction with the flow switch and circuitry within the power source. This system prevents the torch from being energized with high voltage if the torch switch is accidentally closed when the shield is removed. AlWAYS RePlACe TORCh WITh The PROPeR TORCh mANUFAC-TUReD BY Prest-O-lite SINCe IT AlONe CONTAINS Prest-O-lite'S PATeNTeD SAFeTY INTeRlOCK.

! WARNING

The seat comes assembled to the front end of the torch. Make sure seat is tightened firmly with a wrench but do NOT overtighten.

2.7 PT-31xl TORCh CONSUmABleS INSTAllATION

Figure 2-6 Assembly of “xT” Consumable Parts

NOTE: NozzlesMarked ByAmperage

0558006190

Plunger

Seat

0558006191

Electrode

0558006192 0558006189

Baffle Nozzle

Heat Shield

0558006185

30/40A

0558006187

1. To disassemble the front end, hold the torch with the shield in an upright position. This will prevent the nozzle, electrode, and swirl baffle from falling free when the shield is removed.

The gas flow check valve is part of the safety interlock and is permanently as-sembled in the torch head. The head must be replaced if this valve malfunctions. The light spring force used to close the ball check can be felt by pushing on the electrode when assembling the front end components.

2. Periodically check the heat shield, electrode, nozzle, and swirl baffle. Replace if worn or damaged.

3. Do not continue to use if the electrode end erodes to a length shorter than 16mm [5/8 in.] as shown in Fugure 2-6 below.

4. Apply a small amount of lubricant P/N 0558000443 (17672), supplied in spare parts kit, to the heat shield or to the o-ring as shown in Figure 4-3. Check o-ring for damage whenever the shield is removed. Replace if necessary.

21

SeCTION 3 OPeRATION

3.0 OPeRATION

To ensure that the Prest-O-lite 380 operates correctly please perform the following steps:

1. Turn on main power switch and make sure air is flowing to the machine. Adjust the air regulator to 65 psi before cutting operations begin.

NOTe:This pressure adjustment must be made within 15 seconds after the machine is turned on. If this is not done within the allotted time the main power must be turned off and back on again to activate the 15 second preflow sequence for air pressure adjustment.

2. Set output current from 15 to 30 amperes to suit cutting conditions prior to operation of the machine. See Page 25.

22

SeCTION 3 OPeRATION

3.1 OPeRATION

eleC- TRIC ShOCK can kill.• Do NOT operate the unit with the cover removed.• Do NOT apply power to the unit while holding or car-

rying the unit.• Do NOT touch any torch parts forward of the torch

handle (nozzle, heat shield, electrode, etc.) with power switch on.

ARC RAYS can burn eyes and skin;

NOISe can damage hearing.

• Wear welding helmet with No. 6 or 7 lens shade.• Wear eye, ear, and body protection.

Position the Prest-O-lite® 380 at least 10 feet (3 meters) from the cutting area. Sparks and hot slag from the cut-ting operation can damage the unit.

3.2 Prest-O-lite® 380 CONTROlS (FIGURe 3-1)

A. Power Switch (located on rear panel). When placed in ON position, the green pilot light will glow indicat-ing control circuit is energized and the cooling fan will run.

B. Output Current Control. Adjustable from 15 to 30 amperes to suit cutting conditions. Set output current to suit cutting conditions prior to operation of machine. See .

C. Air Pressure Adjustment Control. When main power switch is turned on and air is flowing to the machine, the air regulator can be adjusted to the desired pressure (65-70 psig) before cutting operations begin.

NOTe: This pressure adjustment must be made within 15 seconds after the machine is turned on. If this is not done within the allotted time the main power must be turned off and back on again to activate the 15 second preflow sequence for air pressure adjustment. See Page 21.

Figure 3-1 Prest-O-lite® 380 Controls

AIR REGULATOR CONTROL KNOB

AIR PRESSUREGAUGE

CURRENTCONTROL

KNOB

POWERON-OFF

CURRENTCONTROL

TEMPERATURE AIR

23

SeCTION 3 OPeRATION

Figure 3-2 Assembly of “xT” Consumable Parts

that acts in conjunction with the flow switch and circuitry within the power source. This system prevents the torch from being energized with high voltage if the torch switch is accidentally closed when the shield is removed. AlWAYS RePlACe TORCh WITh The PROPeR TORCh mANUFAC-TUReD BY Prest-O-lite SINCe IT AlONe CONTAINS Prest-O-lite’S PATeNTeD SAFeTY INTeRlOCK.

3.4 CUTTING WITh The PT-31xl

Wear the usual protective gloves, clothing, and helmet. helmet with filter lens shade No. 6 or 7 should provide adequate protection for your eyes.

Never touch any parts forward of the torch handle (tip, heat shield, electrode, etc.) unless the power switch is in the OFF position.

CAUTION: Do not depress the torch switch unless thetorch nozzle is touching the workpiece orwithin0.02"(0.51mm)ofworkpiece.

e. "Over Temperature" leD (Yellow light) - will turn on if the machine becomes overheated and will turn off automatically after the machine cools down if the on/off switch is still on.

"low Air Flow" leD (Green light) - will turn on during operation when the air flow is set correctly the LED will switch off below 15psi (1 bar).

On/Off Switch leD (Green light) - will light when power supply is switched on and power is applied. LED will turn off when switch is in OFF position.

Air Pressure Gauge (Side Panel) - Shows air pressure in bars and psi.

3.3 ASSemBlING PT-31xl COmSUmABle PARTS

make sure power switch on power source is in OFF position and primary input power is deenergized.

Install the electrode, baffle, nozzle, and heat shield as shown in Fig. 3-2. Tighten heat shield snugly but do not overtighten.

Be SURe to install the swirl baffle in the torch. Failure to do so would allow the nozzle (tip) to contact the electrode. This contact would permit high voltage to be applied to the nozzle. Your contact with the nozzle or workpiece could then result in serious injury or death by electric shock.

The PT-31xl torch head contains a gas flow check valve

Figure 3-3 effect of Cutting Speed

TOO FAST TOO SLOW CORRECT

NOTE: NozzlesMarked ByAmperage

0558006190

Plunger

Seat

0558006191

Electrode

0558006192 0558006189

Baffle Nozzle

Heat Shield

0558006185

30/40A

0558006187

24

SeCTION 3 OPeRATION

WHEN THE ARC BREAKS THROUGH THE WORK, BRING THE TORCH TO AN UPRIGHT POSI-TION AND PROCEED TO CUT.

TO START A PIERCE, TILT THE TORCH TO PREVENT MOLTEN MATERIAL FROM COMING BACK AGAINST AND DAMAG-ING THE TORCH.

1

2

CAUTION: Locatetheconsoleatleast10-ft.fromthecut-tingworkarea.Chipsandhotslagfromthecuttingoperationcandamagetheconsole.

After placing the primary (wall) switch to the ON position and making control and air pressure adjustments as described above, proceed as follows:

1. Touch the tip of the torch to the workpiece holding the torch at about 15- 30° angle to avoid damaging the tip.

2. Depress the torch switch. (Air and high frequency should energize.)

3. Two seconds after depressing torch switch, the plasma arc will start cutting.

4. After starting the cut, bring the torch to an upright position and proceed to cut by dragging the torch along the workpiece. It may be necessary to cut with a tip-to-work (standoff) distance of up to 1/16" due to various material surface conditions.

Figure 3-4 Piercing Technique using the PT-31xl

5. When ending a cut, the torch switch should be released to minimize double-arcing which can damage the tip. This is to prevent high frequency from reigniting after cutting arc extinguishes.

6. In the postflow mode, the arc can be restarted immediately by depressing the torch switch. The two second preflow will automatically cancel.

25

Output Cutting Thickness Current SpeedMaterial (In.) (Amps) (ipm)

Carbon 1/16 30 170 Steel 1/8 30 75(AISI 1020) 3/16 30 48 1/4 30 25 3/8 30 12

Stainless 1/16 30 170Steel 1/8 30 72(AISI 304) 3/16 30 45 1/4 30 23 3/8 30 10

Aluminum 1/16 30 170(6061) 1/8 30 75 3/16 30 50 1/4 30 26 3/8 30 12

SeCTION 3 OPeRATION

3.6 COmmON CUTTING PROBlemS

Listed below are common cutting problems followed by the probable cause of each. If problems are determined to be caused by the Prest-O-Lite® 380, refer to the maintenance section of this manual. If the problem is not corrected after referring to the maintenance section, contact your Prest-O-Lite representative.

A. Insufficient Penetration.

1. Cutting speed too fast.2. Damaged cutting nozzle.3. Improper air pressure.

B. main Arc extinguishes.

Cutting speed too slow.

C. Dross Formation. (In some materials and thicknesses, it may be impossible to get dross-free cuts.)

1. Cutting speed too fast or too slow.2. Improper air pressure.3. Faulty nozzle or electrode.

D. Double Arcing. (Damaged Nozzle Orifice.)

1. Low air pressure.2. Damaged cutting nozzle.3. Loose cutting nozzle.4. Heavy spatter.

e. Uneven Arc.

Damaged cutting nozzle or worn electrode.

F. Unstable Cutting Conditions.

1. Incorrect cutting speed.2. Loose cable or hose connections.3. Electrode and/or cutting nozzle in poor condi-

tion.

G. main Arc Does Not Strike.

1. Loose connections2. Missing torch parts3. Air pressure too high or too low4. Work lead not properly connected

h. Poor Consumable life.

1. Improper air pressure.2. Contaminated air supply.

NOTe:The speeds given here are typical for best quality cuts. Your actual speeds may vary depending on material composition, surface condition, operator technique, etc. If cutting speed is too fast, you may lose the cut. With slower speeds excessive dross may accumulate. If speed is too slow, the arc may extinguish. Air cutting typically produces a rough face on stainless steel and aluminum.

Cutting Speed Range — Prest-O-lite® 380(Using Air with xT Consumables @ 70 psi)

3.5 OPeRATING TeChNIQUeS

1. Piercing - Materials may be pierced with the torch touch-ing the work. When piercing thicker materials of 1/4" or more, immediately raise the torch to 1/16" standoff after initiating the cutting arc. This will reduce the chance of spatter from entering the torch and prevent the possibility of welding the tip to the plate. The torch should be angled at about 30° when starting to pierce. After completing the pierce, bring the torch to an upright position and proceed to cut by dragging the torch along the workpiece. Refer-ence Figure 3-4.

2. Grate Cutting - For rapid restarts, such as grate or heavy mesh cutting, do not release the torch switch. This avoids the 2 second preflow portion of the cutting cycle.

26

SeCTION 3 OPeRATION

27

SeCTION 4 mAINTeNANCe

4.1 GeNeRAl

If this equipment does not operate properly, stop work immediately and investigate the cause of the malfunction. maintenance work must be performed by an experienced person, and electrical work by a trained electrician. Do not permit untrained persons to inspect, clean, or repair this equipment. Use only recommended replacement parts.

Be sure that the wall disconnect switch or wall circuit breaker is open before attempting any inspection or work inside of the Prest-O-lite 380.

4.2 INSPeCTION AND CleANING

Frequent inspection and cleaning of the Prest-O-Lite 380 is recommended for safety and proper operation. Some sug-gestions for inspecting and cleaning are as follows:

A. Check work cable to workpiece connection.

B. Check safety earth ground at workpiece and at power source chassis.

C. Check heat shield on torch. It should be replaced if damaged.

D. Check the torch electrode and cutting nozzle for wear on a daily basis. Remove spatter or replace if neces-sary.

E. Make sure cable and hoses are not damaged or kinked.

F. Make sure all fittings and ground connections are tight.

G. With all input power disconnected, and wearing proper eye and face protection, blow out the inside of the Prest-O-Lite® 380 using low-pressure dry compressed air.

H. Water or oil occasionally accumulates in the bowl of the air pressure regulator. To drain bowl, turn machine off with air supplied to the machine, then push upward on the button located on the bottom of the bowl. See Figure 4-1.

PISTON PLUG

PISTON

SPRING

FLOW SWITCH

4.3 FlOW SWITCh (FIGURe 4-2)

When excessive contamination is found in the air, the flow switch (FS) should be removed, disassembled and cleaned as follows:

A. Ensure the system is shut down and there is no trapped air under pressure in the piping.

B. Remove the piston plug.

C. Remove the spring (FS-4 only). Use care when handling spring to prevent distortion.

D. Remove the piston.

E. Clean all parts with cleaning agent.

NOTeensure cleaning agent does not contain solvents which can degrade polysulfone. Warm water and detergent is recommended for cleaning. Allow all parts to dry thor-oughly before reassembly.

Reassemble the flow switch in reverse order.

Figure 4-2 Disassembly / Assembly of Flow Switch

Button

Air Pressure Regulator Bowl

Figure 4-1 Draining Bowl

28


Before any maintenance is attempted on this torch, make sure the POWeR SWITCh on the power source is in the OFF position and the PRImARY INPUT POWeR is DeeNeRGIZeD.

! WARNING1. To disassemble the front end, hold the torch with the shield in an upright position.

This will prevent the nozzle, electrode, and swirl baffle from falling free when the shield is removed.

The gas flow check valve is part of the safety interlock and is permanently as-sembled in the torch head. The head must be replaced if this valve malfunctions. The light spring force used to close the ball check can be felt by pushing on the electrode when assembling the front end components.

2. Periodically check the heat shield, electrode, nozzle, and swirl baffle. Replace if worn or damaged.

3. Do not continue to use if the electrode end erodes to a length shorter than 16mm [5/8 in.] as shown in Fugure 4-3 below.

4. Apply a small amount of lubricant P/N 0558000443 (17672), supplied in spare parts kit, to the heat shield as shown in Figure 4-3 below or to the o-ring. Check o-ring for damage whenever the shield is removed. Replace if necessary.

Figure 4-3 O-ring and electrode maintenance

16mm (0.63")Minimum

"XT" ElectrodeReplace electrode when end wears to 16mm (0.63") long.

Lubricant can be applied toO-ring or Heat Shield

5. The power cable and switch leads in the service line should be inspected periodi-cally. If there are any cuts through the protective sheath or if gas leaks are noted, replace the damaged component.

By following Steps 1, 2, and 3 in Subsection 4.5 the service line can be removed from the torch. To disassemble the service line, lay the line out straight, remove the tape from around the switch lead splices, and free the switch by cutting the leads close to the splices. Replacement switches have extra long leads to make up for any loss due to cutting. Remove the rubber boot from the inlet end of the cable and remove the tape that secures the sheath at each end. Pull the sheath off the cable (over small fitting at torch end). Note that the switch leads wrapped around the power cable are secured with tape several places along the cable. The leads, switch cord plug, and strain relief can now be removed. DO NOT remove the white tape that forms a band around the power cable at each end. The sheath is taped to the cable in front of the band which acts as a shoulder to prevent the sheath from sliding back on the cable. Replacement cables have this tape in place. If the switch leads are to be replaced, replace with 16 AWG STRANDED COPPER, 600- VOLT, 90° C (194° F) INSULATED WIRE. Reassemble in reverse order.

6. To reposition the switch on the torch, slide the flex support back, remove the tape securing the spliced leads to the power cable, reposition switch, retape the leads, and pull the flex support back in place.

NOTE: A thin film of silicone lubricant P/N 0558000443 (17672), supplied with the spare parts kit, applied inside of the flex support will ease the assembly of this part.

4.4 PT-31xl TORCh mAINTeNANCe

29


!W

AR

NIN

G

Be

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e to

tig

hte

n fi

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gs

secu

rely

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ng

2 w

ren

ches

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uri

ng

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bly

. (F

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ry r

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ed t

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ue

is

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-lb

s).

Failu

re to

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uld

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lt in

ser

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to

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or.

Pull

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ortb

ack.

Rem

ove

tape

hol

ding

spl

ices

.

1

2

3

Slid

esw

itch

and

ban

dfr

om

hand

le.

Snip

lead

sat

spl

ice

to

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ace

swit

ch.

Uns

crew

han

dle

and

pow

er

cabl

efr

omh

ead

4.5 POWeR CABle AND SWITCh DISASSemBlY SeQUeNCe

30

SeCTION 4 mAINTeNANCeW

ORK

LEA

DCO

NN

ECTI

ON

TORC

HCO

NN

ECTI

ON

31

SeCTION 5 TROUBleShOOTING

The cause of control malfunctions can be found by referring to the sequence of operations and electrical schematic diagram and checking the various compo-nents. A volt-ohmmeter will be necessary for some of these checks.

Voltages in plasma cutting equipment are high enough to cause serious injury or possibly death. Be particu-larly careful around equipment when the covers are removed.

NOTE

Before checking voltages in the circuit, disconnect the power from the high frequency generator to avoid damaging your voltmeter.

5.2 TROUBleShOOTING GUIDe

5.1 TROUBleShOOTING

eleCTRIC ShOCK CAN KIll! Be sure that all primary power to the machine has been externally disconnected. Open the line (wall) disconnect switch or circuit breaker before attempting inspection or work inside of the power source.

Check the problem against the symptoms in the following troubleshooting guide. The remedy may be quite simple. If the cause cannot be quickly located, shut off the input power, open up the unit, and perform a simple visual inspection of all the components and wiring. Check for secure termi-nal connections, loose or burned wiring or components, bulged or leaking capacitors, or any other sign of damage or discoloration.

Depress torch switch. After 2 seconds, is high frequency present?

No

Repair/replace high frequencyunit

Repair/replace power source

Yes

A. Difficult Starting. • Change electrode • Change nozzle • Check for good, clean connection of work lead to workpiece • Check air pressure 65-70 psig (4.5 - 4.8 bar) • Check torch power cable for continuity

Is the "Air" LED light on

Repair/replace control PCB

Yes No

32


B. No Air

Is air hose connected?

Yes No Connect

Is air adjusted to 65 - 70 psig (4.5 - 4.8 bar)?

Yes No Adjust

Does air come on when main power turned on?

Yes No • No electrode in torch • No valve pin in torch • Replace electrode Check continuity of torch switch • Replace valve pin

OK No Replace torch switch

Repair /replace power source

33


C. Air does not shut off

Does arc start when nozzle contacts work without depressing torch switch?

Yes No

Check for short in torch switch or torch switch leads

Does air flow even when Prest-O-Lite® 380 power switch is OFF?

Yes No

Replace Repair/replace control

solenoid valve PCB

34


D. Power switch light not energized.

Is switch ON?

Yes No Turn on switch

Is input power plug in receptacle?

Yes No Insert plug

Is cooling fan turning?

No

Check voltage at receptacle and input power line

No Check main fuses

Replace main power switch

Yes

Yes

35


Unsolved

e. Temperature leD light ON.

Is the unit overheated?

(LED turns off

when unit cools down.)

Yes No

Is cooling air flowing?

Duty cycle exceeded:

35% @ 30 A Yes No

or 100% @ 21 A output

Repair power source Repair fan

F. No current output

Is input voltage within -10% of units input rating?

Yes No

See "D" sequence

Repair/replace Inverter

36

PUSH RELEASE TORCH SWITCH

OPEN CLOSE

GAS SOLENOID VALVE

PREFLOW

FLOW SWITCH CLOSE

FAULT OVERLOAD LIGHT

HF CIRCUIT

INVERTER

CUTTING ARC (CURRENT)

ENERGIZE

10-14 SEC-ONDS

Postflow

OPEN


NOTeS:

1. When the torch switch is depressed during postflow period, the postflow and preflow times are canceled, and the HF is energized immediately. The postflow time starts from the moment the torch switch is released.

5.3 SeQUeNCe OF OPeRATION

2SECONDS

37

SeCTION 6 RePlACemeNT PARTS

6.1 GeNeRAl

Replacement Parts are illustrated on the following figures. When ordering replacement parts, order by part number and part name, as illustrated on the figure.

Always provide the series or serial number of the unit on which the parts will be used. The serial number is stamped on the unit nameplate.

6.2 ORDeRING

Replacement parts may be ordered from your Prest-O-Lite distributor or from:

Prest-O-lite Welding & Cutting Products Attn: Customer Service Dept. PO Box 100545, ebenezer Road Florence, SC, 29501-0545

Be sure to indicate any special shipping instructions when ordering replacement parts.

Refer to the Communications Guide on back cover of this manual for a list of customer service phone numbers.

38


2322

21

rear front front rear

front rear rear front

front rear rear front

3

5 4

6 10

8 7 9 17

13 11 18 12

15 16

19

20

24

25

380 PlASmA CUTTeR

380 PlASmA CUTTeR

39


23 Heat Sink w/Diodes 0700156017 24 Adaptor, Bulk Head 58V75

25 Female Torch Connector Plug: 0558004947 Plug Is Attached To Torch And Connects to Mating Male Connector Located Inside Machine Cover.

* See Page 11 for illustration of complete Prest-O-Lite® 380 package

** Includes Torch & Spare Parts Kit

22 Transformer (ferrites) 0700156016

21 Choke 0700156015

20 Pressure Guage 0558002768 *19 Work Cable w/clamp 0700156013

18 Solenoid Valve Assy. 0558002764

17 On/Off Switch 0700156012

16 Bottom Plate 0700156014

15 Inverter PCB 0700156011 *14 PT - 31 Torch Assy. 0558004482

13 Flow Switch Assy. 951202

12 EMC Filter 0558002746

11 Fan Grid 0558002739

10 Fan 0558002738 9 Air Gauge/ Filter Assy. 0558002767 8 Power Cable 0558003342

7 Air Nipple 1/8" 0700156006

6 HF Generator 0700156005

5 Control/HF PCB 0700156004

4 Control PCB 0700156003

3 Knob dia. 25 mm complete 0558002735

*2 Lid with handle 0558004643

*1 Prest-O-Lite® 380 Package** 0558006057

Nr. Description Prest-O-Lite Part #

40


SEAT

- 19

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41

Notes

Revision history

Original release 06 / 2006

03 / 2007 - Revised Title Page layout / text.

A. CUSTOMER SERVICE QUESTIONS: Telephone: (800)362-7080 / Fax: (800) 634-7548 Hours: 8:00 AM to 7:00 PM EST Order Entry Product Availability Pricing Order Information Returns

B. ENGINEERING SERVICE: Telephone: (843) 664-4416 / Fax : (800) 446-5693 Hours: 7:30 AM to 5:00 PM EST Warranty Returns Authorized Repair Stations Welding Equipment Troubleshooting

C. TECHNICAL SERVICE: Telephone: (800) 372-2123/ Fax: (843) 664-4452 Hours: 8:00 AM to 5:00 PM EST Part Numbers Technical Applications Specifications Equipment Recommendations

D. LITERATURE REQUESTS: Telephone: (843) 664-5562 / Fax: (843) 664-5548 Hours: 7:30 AM to 4:00 PM EST

E. WELDING EQUIPMENT REPAIRS: Telephone: (843) 664-4487 / Fax: (843) 664-5557 Hours: 7:30 AM to 3:30 PM EST Repair Estimates Repair Status

F. WELDING EQUIPMENT TRAINING Telephone: (843)664-4428 / Fax: (843) 679-5864 Hours: 7:30 AM to 4:00 PM EST Training School Information and Registrations

G. WELDING PROCESS ASSISTANCE: Telephone: (800) 372-2123 Hours: 7:30 AM to 4:00 PM EST

H. TECHNICAL ASST. CONSUMABLES:

Telephone : (800) 933-7070 Hours: 7:30 AM to 5:00 PM EST

IF YOU DO NOT KNOW WhOm TO CAll

Telephone: (800) 372-2123 Fax: (843) 664-4462

Hours: 7:30 AM to 5:00 PM ESTor

visit us on the web at http://www.all-statewelding.comThe Prest-O-Lite web site offers

Comprehensive Product InformationMaterial Safety Data Sheets

Warranty RegistrationInstruction Literature Download Library

Distributor LocatorGlobal Company Information

Press ReleasesCustomer Feedback & Support

Prest-O-lite Welding & Cutting Products,PO Box 100545, Florence, SC

COmmUNICATION GUIDe - CUSTOmeR SeRVICeS

A member of the ESAB GroupForm No: 0558006081 03 / 2007

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