ESAB 281 FABRICATOR® Mig Welding Machine Manuel utilisateur

Art # A-09904

208

V

Hz

1

FABRICATOR

®

MIG WELDING MACHINE

281

Service

Manual

Version No: AH Issue Date: April 17 Manual No.: 0-4880B

Operating Features:

WE APPRECIATE YOUR BUSINESS!

Congratulations on your new Thermal Arc product. We are proud

to have you as our customer and will strive to provide you with the

best service and reliability in the industry. This product is backed

by our extensive warranty and world-wide service network. To

locate your nearest distributor or service agency call

1-800-462-2782, or visit us on the web at www.Thermalarc.com.

This Operating Manual has been designed to instruct you on the

correct use and operation of your Thermal Arc product. Your

satisfaction with this product and its safe operation is our ultimate

concern. Therefore please take the time to read the entire manual,

especially the Safety Precautions. They will help you to avoid

potential hazards that may exist when working with this product.

YOU ARE IN GOOD COMPANY!

The Brand of Choice for Contractors and Fabricators Worldwide.

Thermal Arc is a Global Brand of Arc Welding Products for

Thermadyne Industries Inc. We manufacture and supply to major

welding industry sectors worldwide including; Manufacturing,

Construction, Mining, Automotive, Aerospace, Engineering, Rural

and DIY/Hobbyist.

We distinguish ourselves from our competition through market-

leading, dependable products that have stood the test of time.

We pride ourselves on technical innovation, competitive prices,

excellent delivery, superior customer service and technical

support, together with excellence in sales and marketing expertise.

Above all, we are committed to develop technologically advanced

products to achieve a safer working environment within the

welding industry.

WARNINGS

Read and understand this entire Manual and your employer’s safety practices before installing,

operating, or servicing the equipment.

While the information contained in this Manual represents the Manufacturer's best judgement, the

Manufacturer assumes no liability for its use.

Fabricator 281 MIG Welding Machine

Service Manual Number 0-4880B for:

Package System Part Number W1001600

Power Source Part Number 707300

Published by:

Thermadyne Inc.

82 Benning Street

West Lebanon, New Hampshire, USA 03784

(603) 298-5711

www.thermalarc.com

Thermadyne Industries Inc.

Reproduction of this work, in whole or in part, without written permission of the pub-

lisher is prohibited.

The publisher does not assume and hereby disclaims any liability to any party for any

loss or damage caused by any error or omission in this Manual, whether such error

results from negligence, accident, or any other cause.

Publication Date: June 9, 2006

Revision AH Date: April 17, 2012

Record the following information for Warranty purposes:

Where Purchased: ____________________________________

Purchase Date: ____________________________________

Equipment Serial #: ____________________________________

i

TABLE OF CONTENTS

SECTION 1:SAFETY INSTRUCTIONS AND WARNINGS ................................................ 1-1

1.01 Arc Welding Hazards ....................................................................................... 1-1

1.02 Principal Safety Standards .............................................................................. 1-4

1.03 Precautions De Securite En Soudage A L’arc .................................................. 1-5

1.04 Dangers relatifs au soudage à l’arc ................................................................. 1-5

1.05 Principales Normes De Securite ..................................................................... 1-8

SECTION 2:INTRODUCTION .............................................................................. 2-1

2.01 How To Use This Manual ................................................................................ 2-1

2.02 Equipment Identiﬁcation ................................................................................. 2-1

2.03 Symbol Chart .................................................................................................. 2-2

2.04 General Information ........................................................................................ 2-3

2.05 Safety .............................................................................................................. 2-3

2.06 Protective Filter Lenses ................................................................................... 2-3

2.07 User Responsibility ......................................................................................... 2-4

2.08 Duty Cycle ....................................................................................................... 2-4

2.09 Speciﬁcations ................................................................................................. 2-4

2.10 Included Items ................................................................................................ 2-6

2.11 Optional Accessories ...................................................................................... 2-6

SECTION 3:INSTALLATION ................................................................................ 3-1

3.01 Environment ................................................................................................... 3-1

3.02 Location .......................................................................................................... 3-1

3.03 Ventilation ....................................................................................................... 3-1

3.04 Primary Input Voltage Requirements .............................................................. 3-2

3.05 Alternative Primary Input Voltages ................................................................. 3-2

3.06 Quick Setup .................................................................................................... 3-4

3.07 Mount the A2281 Wire Feeder ........................................................................ 3-5

3.08 Installation of Shielding Gas (GMAW) Process ............................................... 3-5

3.09 Attaching the Gun and Cable Assembly to the Remote Feeder ........................ 3-8

3.10 Selection and Installation of Feedrolls ............................................................ 3-9

3.11 Input And Output Wire Guide Installation ..................................................... 3-10

3.12 Installing Wire Spool on the Remote ............................................................ 3-10

3.13 Inserting Wire into the Feedhead ................................................................. 3-12

3.14 Wirefeeder Feedroll Pressure Adjustment ..................................................... 3-13

3.15 Wire Spool Hub Brake ................................................................................... 3-13

3.16 Spool Gun Attachment .................................................................................. 3-14

3.17 Polarity Changeover ...................................................................................... 3-14

TABLE OF CONTENTS (continued)TABLE OF CONTENTS

SECTION 4:OPERATION .................................................................................... 4-1

4.01 Power Supply Controls, Indicators and Features ............................................ 4-1

4.02 Internal Controls of A2281 Remote ................................................................ 4-7

4.03 TWECO Weldskill 300 AMP Weld Gun ............................................................ 4-9

4.04 Installing A New Wire Conduit ...................................................................... 4-10

4.05 MIG Gun Maintenance .................................................................................. 4-11

4.06 Basic Welding Technique .............................................................................. 4-11

4.07 Stitch Welding Operation .............................................................................. 4-14

4.08 Spot Welding Operation ................................................................................ 4-14

4.09 Gas Selection for Gas Metal Arc Welding ...................................................... 4-15

4.10 Welding Setting Selection Guide ................................................................... 4-16

SECTION 5:MAINTENANCE ................................................................................ 5-1

5.01 Routine Maintenance & Inspection ................................................................. 5-1

SECTION 6:TROUBLESHOOTING ......................................................................... 6-1

6.01 Basic Troubleshooting .................................................................................... 6-1

6.02 Solving Problems Beyond the Welding Terminals .......................................... 6-1

6.03 Welding Problems .......................................................................................... 6-3

6.04 Power Supply Problems ................................................................................. 6-5

6.05 Wire Feeder Problems .................................................................................... 6-6

SECTION 7:ADVANCED TROUBLESHOOTING ........................................................... 7-1

7.01 Preliminary Checks ......................................................................................... 7-1

7.02 Initial Setup Conditions ................................................................................... 7-2

7.03 Primary Power Test ........................................................................................ 7-2

7.04 Logic and Control Tests .................................................................................. 7-3

7.05 Spool Gun Control (J1) Test .......................................................................... 7-4

7.06 Output Voltage Test ......................................................................................... 7-5

7.07 Wire Feed & Weld Test ................................................................................... 7-6

7.08 Primary Power Problems ................................................................................ 7-6

7.09 Logic and Control Problems ........................................................................... 7-7

7.10 Spool Gun Control (J1) Problem .................................................................... 7-8

7.11 Output Voltage Problem .................................................................................. 7-8

7.12 Wire Feed and Weld Problems ........................................................................ 7-9

7.13 Terminal Block Voltage Test ............................................................................ 7-9

7.14 SW3 Coarse and SW4 Fine Rotary Switch Test ............................................. 7-10

7.15 MIG Timer PCB (PCB2) Test ......................................................................... 7-12

7.16 Rectiﬁer Assembly Test ............................................................................... 7-13

7.17 Main Transformer Test .................................................................................. 7-14

TABLE OF CONTENTS

SECTION 8:CIRCUIT OPERATION ......................................................................... 8-1

8.01 Circuit Operation Of The Control PCB 7978050 .............................................. 8-1

8.02 Circuit Operation Of The MIG Timer PCB 7977965 ......................................... 8-2

8.03 Circuit Operation Of The Digital Volt/Amp PCB 704883 .................................. 8-2

8.04 Circuit Operation Of The Spool Gun PCB 7978034 ......................................... 8-3

SECTION 9:PARTS LIST.................................................................................... 9-1

9.01 Equipment Identiﬁcation ................................................................................. 9-1

9.02 How To Use This Parts List ............................................................................. 9-1

9.03 Power Supply External Replacement Parts (1) ............................................... 9-2

9.04 Power Supply External Replacement Parts (2) ............................................... 9-4

9.05 Power Supply Electrical Replacement Parts .................................................... 9-5

9.06 Remote Parts (1) ............................................................................................ 9-6

9.07 Remote Parts (2) ............................................................................................ 9-7

9.08 Remote Parts (3) ............................................................................................ 9-8

9.09 Remote Electrical Components (1) ................................................................ 9-9

9.10 Remote Wire Feeder Parts ............................................................................ 9-10

9.11 MIG Torch ..................................................................................................... 9-12

APPENDIX 1: OPTIONAL ACCESSORIES AND CONSUMABLES ...................................... A-1

APPENDIX 2: POWER SUPPLY CIRCUIT DIAGRAM .................................................... A-2

APPENDIX 3: MAIN PCB CIRCUIT DIAGRAM ........................................................... A-4

APPENDIX 4: SPOT TIMER CIRCUIT DIAGRAM ....................................................... A-6

APPENDIX 5: SPOOL GUN PCB .......................................................................... A-8

APPENDIX 6: FEEDROLL KITS ...........................................................................A-10

APPENDIX 7: WIRE FEEDER TERMINAL BLOCK DIAGRAM ..........................................A-11

STATEMENT OF WARRANTY

WARRANTY SCHEDULE

FABRICATOR 281

Manual No. 0-4880B 1-1 SAFETY INSTRUCTIONS

1.01 Arc Welding Hazards

WARNING

ELECTRIC SHOCK can kill.

Touching live electrical parts can cause fatal shocks

or severe burns. The electrode and work circuit is

electrically live whenever the output is on. The input

power circuit and machine internal circuits are also live

when power is on. In semiautomatic or automatic wire

welding, the wire, wire reel, drive roll housing, and all

metal parts touching the welding wire are electrically

live. Incorrectly installed or improperly grounded

equipment is a hazard.

1. Do not touch live electrical parts.

2. Wear dry, hole-free insulating gloves and body protection.

3. Insulate yourself from work and ground using dry insulating

mats or covers.

4. Disconnect input power or stop engine before installing or

servicing this equipment. Lock input power disconnect switch

open, or remove line fuses so power cannot be turned on

accidentally.

5. Properly install and ground this equipment according to its

Owner’s Manual and national, state, and local codes.

6. Turn off all equipment when not in use. Disconnect power to

equipment if it will be left unattended or out of service.

7. Use fully insulated electrode holders. Never dip holder in water

to cool it or lay it down on the ground or the work surface. Do

not touch holders connected to two welding machines at the

same time or touch other people with the holder or electrode.

8. Do not use worn, damaged, undersized, or poorly spliced

cables.

9. Do not wrap cables around your body.

10. Ground the workpiece to a good electrical (earth) ground.

11. Do not touch electrode while in contact with the work (ground)

circuit.

12. Use only well-maintained equipment. Repair or replace

damaged parts at once.

13. In conﬁned spaces or damp locations, do not use a welder with

AC output unless it is equipped with a voltage reducer. Use

equipment with DC output.

14. Wear a safety harness to prevent falling if working above ﬂoor

level.

15. Keep all panels and covers securely in place.

WARNING

ARC RAYS can burn eyes and skin; NOISE can damage

hearing. Arc rays from the welding process produce

intense heat and strong ultraviolet rays that can

burn eyes and skin. Noise from some processes can

damage hearing.

1. Wear a welding helmet ﬁtted with a proper shade of ﬁlter (see

ANSI Z49.1 listed in Safety Standards) to protect your face and

eyes when welding or watching.

2. Wear approved safety glasses. Side shields recommended.

3. Use protective screens or barriers to protect others from ﬂash

and glare; warn others not to watch the arc.

4. Wear protective clothing made from durable, flame-resistant

material (wool and leather) and foot protection.

SECTION 1:

SAFETY INSTRUCTIONS AND WARNINGS

WARNING

PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH. KEEP CHILDREN AWAY. PACEMAKER WEARERS KEEP

AWAY UNTIL CONSULTING YOUR DOCTOR. DO NOT LOSE THESE INSTRUCTIONS. READ OPERATING/INSTRUCTION MANUAL BEFORE

INSTALLING, OPERATING OR SERVICING THIS EQUIPMENT.

Welding products and welding processes can cause serious injury or death, or damage to other equipment or property, if the operator does

not strictly observe all safety rules and take precautionary actions.

Safe practices have developed from past experience in the use of welding and cutting. These practices must be learned through study and

training before using this equipment. Some of these practices apply to equipment

connected to power lines; other practices apply to engine driven equipment. Anyone not having extensive

training in welding and cutting practices should not attempt to weld.

Safe practices are outlined in the American National Standard Z49.1 entitled: SAFETY IN WELDING AND CUTTING. This publication and other

guides to what you should learn before operating this equipment are listed at the end of these safety precautions. HAVE ALL INSTALLATION,

OPERATION, MAINTENANCE, AND REPAIR WORK PERFORMED ONLY BY QUALIFIED PEOPLE.

FABRICATOR 281

SAFETY INSTRUCTIONS 1-2 Manual No. 0-4880B

5. Use approved ear plugs or ear muffs if noise level is high.

WARNING

FUMES AND GASES can be hazardous to your health.

Welding produces fumes and gases. Breathing these

fumes and gases can be hazardous to your health.

1. Keep your head out of the fumes. Do not breath the fumes.

2. If inside, ventilate the area and/or use exhaust at the arc to

remove welding fumes and gases.

3. If ventilation is poor, use an approved air-supplied respirator.

4. Read the Material Safety Data Sheets (MSDSs) and the

manufacturer’s instruction for metals, consumables, coatings,

and cleaners.

5. Work in a conﬁned space only if it is well ventilated, or while

wearing an air-supplied respirator. Shielding gases used for

welding can displace air causing injury or death. Be sure the

breathing air is safe.

6. Do not weld in locations near degreasing, cleaning, or spraying

operations. The heat and rays of the arc can react with vapors to

form highly toxic and irritating gases.

7. Do not weld on coated metals, such as galvanized, lead, or

cadmium plated steel, unless the coating is removed from the

weld area, the area is well ventilated, and if necessary, while

wearing an air-supplied respirator. The coatings and any metals

containing these elements can give off toxic fumes if welded.

WARNING

WELDING can cause ﬁre or explosion.

Sparks and spatter fly off from the welding arc.

The flying sparks and hot metal, weld spatter, hot

workpiece, and hot equipment can cause fires and

burns. Accidental contact of electrode or welding wire

to metal objects can cause sparks, overheating, or

ﬁre.

1. Protect yourself and others from ﬂying sparks and hot metal.

2. Do not weld where ﬂying sparks can strike ﬂammable material.

3. Remove all ﬂammables within 35 ft (10.7 m) of the welding arc.

If this is not possible, tightly cover them with approved covers.

4. Be alert that welding sparks and hot materials from welding can

easily go through small cracks and openings to adjacent areas.

5. Watch for ﬁre, and keep a ﬁre extinguisher nearby.

6. Be aware that welding on a ceiling, ﬂoor, bulkhead, or partition

can cause ﬁre on the hidden side.

7. Do not weld on closed containers such as tanks or drums.

8. Connect work cable to the work as close to the welding area

as practical to prevent welding current from traveling long,

possibly unknown paths and causing electric shock and fire

hazards.

9. Do not use welder to thaw frozen pipes.

10. Remove stick electrode from holder or cut off welding wire at

contact tip when not in use.

Eye protection ﬁlter shade selector for welding or cutting

(goggles or helmet), from AWS A6.2-73.

Welding or cutting

Operation

Electrode Size

Metal Thickness

or Welding Current

Filter

Shade

No.

Welding or cutting

Operation

Electrode Size

Metal Thickness

or Welding

Current

Filter

Shade

No.

Torch soldering 2 Gas metal-arc

welding (MIG)

Torch brazing 3 or 4 Non-ferrous base metal All 11

Oxygen Cutting Ferrous base metal All 12

Light Under 1 in., 25 mm 3 or 4 Gas tungsten arc welding All 12

Medium 1 to 6 in., 25-150 mm 4 or 5 (TIG) All 12

Heavy Over 6 in., 150 mm 5 or 6 Atomic hydrogen welding All 12

Gas welding Carbon arc welding All 12

Light Under 1/8 in., 3 mm 4 or 5 Plasma arc welding

Medium 1/8 to 1/2 in., 3-12 mm 5 or 6 Carbon arc air gouging

Heavy Over 1/2 in., 12 mm 6 or 8 Light 12

Shielded metal-arc

welding

(stick) electrodes

Under 5/32 in., 4 mm 10 Heavy 14

5/32 to 1/4 in.,

4 to 6.4 mm

12 Plasma arc cutting

Over 1/4 in., 6.4 mm 14 Light Under 300 Amp 9

Medium 300 to 400 Amp 12

Heavy Over 400 Amp 14

FABRICATOR 281

Manual No. 0-4880B 1-3 SAFETY INSTRUCTIONS

WARNING

FLYING SPARKS AND HOT METAL can cause injury.

Chipping and grinding cause flying metal. As welds

cool, they can throw off slag.

1. Wear approved face shield or safety goggles. Side shields

recommended.

2. Wear proper body protection to protect skin.

WARNING

CYLINDERS can explode if damaged.

Shielding gas cylinders contain gas under high

pressure. If damaged, a cylinder can explode. Since

gas cylinders are normally part of the welding process,

be sure to treat them carefully.

1. Protect compressed gas cylinders from excessive heat,

mechanical shocks, and arcs.

2. Install and secure cylinders in an upright position by chaining

them to a stationary support or equipment cylinder rack to

prevent falling or tipping.

3. Keep cylinders away from any welding or other electrical

circuits.

4. Never allow a welding electrode to touch any cylinder.

5. Use only correct shielding gas cylinders, regulators, hoses, and

ﬁttings designed for the speciﬁc application; maintain them and

associated parts in good condition.

6. Turn face away from valve outlet when opening cylinder valve.

7. Keep protective cap in place over valve except when cylinder is

in use or connected for use.

8. Read and follow instructions on compressed gas cylinders,

associated equipment, and CGA publication P-1 listed in Safety

Standards.

WARNING

Engines can be dangerous.

WARNING

ENGINE EXHAUST GASES can kill.

Engines produce harmful exhaust gases.

1. Use equipment outside in open, well-ventilated areas.

2. If used in a closed area, vent engine exhaust outside and away

from any building air intakes.

WARNING

ENGINE FUEL can cause ﬁre or explosion.

Engine fuel is highly ﬂammable.

1. Stop engine before checking or adding fuel.

2. Do not add fuel while smoking or if unit is near any sparks or

open ﬂames.

3. Allow engine to cool before fueling. If possible, check and add

fuel to cold engine before beginning job.

4. Do not overﬁll tank — allow room for fuel to expand.

5. Do not spill fuel. If fuel is spilled, clean up before starting

engine.

WARNING

MOVING PARTS can cause injury.

Moving parts, such as fans, rotors, and belts can cut ﬁngers and

hands and catch loose clothing.

1. Keep all doors, panels, covers, and guards closed and

securely in place.

2. Stop engine before installing or connecting unit.

3. Have only qualified people remove guards or covers for

maintenance and troubleshooting as necessary.

4. To prevent accidental starting during servicing, disconnect

negative (-) battery cable from battery.

5. Keep hands, hair, loose clothing, and tools away from

moving parts.

6. Reinstall panels or guards and close doors when servicing

is ﬁnished and before starting engine.

WARNING

SPARKS can cause BATTERY GASES TO EXPLODE;

BATTERY ACID can burn eyes and skin.

Batteries contain acid and generate explosive gases.

1. Always wear a face shield when working on a battery.

2. Stop engine before disconnecting or connecting battery cables.

3. Do not allow tools to cause sparks when working on a battery.

4. Do not use welder to charge batteries or jump start vehicles.

5. Observe correct polarity (+ and –) on batteries.

FABRICATOR 281

SAFETY INSTRUCTIONS 1-4 Manual No. 0-4880B

WARNING

STEAM AND PRESSURIZED HOT COOLANT can burn

face, eyes, and skin.

The coolant in the radiator can be very hot and under

pressure.

1. Do not remove radiator cap when engine is hot. Allow engine to

cool.

2. Wear gloves and put a rag over cap area when removing cap.

3. Allow pressure to escape before completely removing cap.

WARNING

This product, when used for welding or cutting,

produces fumes or gases which contain chemicals

know to the State of California to cause birth defects

and, in some cases, cancer. (California Health &

Safety code Sec. 25249.5 et seq.)

NOTE

Considerations About Welding And The Effects of Low

Frequency Electric and Magnetic Fields

The following is a quotation from the General Conclusions Section

of the U.S. Congress, Ofﬁce of Technology Assessment, Biological

Effects of Power Frequency Electric & Magnetic Fields - Background

Paper, OTA-BP-E-63 (Washington, DC: U.S. Government Printing

Ofﬁce, May 1989): “...there is now a very large volume of scientiﬁc

ﬁndings based on experiments at the cellular level and from studies

with animals and people which clearly establish that low frequency

magnetic ﬁelds and interact with, and produce changes in, biological

systems. While most of this work is of very high quality, the results

are complex. Current scientiﬁc understanding does not yet allow us

to interpret the evidence in a single coherent framework. Even more

frustrating, it does not yet allow us to draw definite conclusions

about questions of possible risk or to offer clear science-based ad-

vice on strategies to minimize or avoid potential risks.”

To reduce magnetic fields in the workplace, use the following

procedures.

1. Keep cables close together by twisting or taping them.

2. Arrange cables to one side and away from the operator.

3. Do not coil or drape cable around the body.

4. Keep welding power source and cables as far away from

body as practical.

ABOUT PACEMAKERS:

The above procedures are among those also normally

recommended for pacemaker wearers. Consult your

doctor for complete information.

1.02 Principal Safety Standards

Safety in Welding and Cutting, ANSI Standard Z49.1, from American

Welding Society, 550 N.W. LeJeune Rd., Miami, FL 33126.

Safety and Health Standards, OSHA 29 CFR 1910, fro m

Superintendent of Documents, U.S. Government Printing Office,

Washington, D.C. 20402.

Recommended Safe Practices for the Preparation for Welding

and Cutting of Containers That Have Held Hazardous Substances,

American Welding Society Standard AWS F4.1, from American

Welding Society, 550 N.W. LeJeune Rd., Miami, FL 33126.

National Electrical Code, NFPA Standard 70, from National Fire

Protection Association, Batterymarch Park, Quincy, MA 02269.

Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1,

from Compressed Gas Association, 1235 Jefferson Davis Highway,

Suite 501, Arlington, VA 22202.

Code for Safety in Welding and Cutting, CSA Standard W117.2,

from Canadian Standards Association, Standards Sales, 178

Rexdale Boulevard, Rexdale, Ontario, Canada M9W 1R3.

Safe Practices for Occupation and Educational Eye and Face

Protection, ANSI Standard Z87.1, from American National Standards

Institute, 1430 Broadway, New York, NY 10018.

Cutting and Welding Processes, NFPA Standard 51B, from National

Fire Protection Association, Batterymarch Park, Quincy, MA 02269.

FABRICATOR 281

Manual No. 0-4880B 1-5 SAFETY INSTRUCTIONS

1.03 Precautions De Securite En Soudage A L’arc

MISE EN GARDE

LE SOUDAGE A L’ARC EST DANGEREUX

PROTEGEZ-VOUS, AINSI QUE LES AUTRES, CONTRE LES BLESSURES GRAVES POSSIBLES OU LA MORT. NE LAISSEZ PAS LES ENFANTS

S’APPROCHER, NI LES PORTEURS DE STIMULATEUR CARDIAQUE (A MOINS QU’ILS N’AIENT CONSULTE UN MEDECIN). CONSERVEZ CES

INSTRUCTIONS. LISEZ LE MANUEL D’OPERATION OU LES INSTRUCTIONS AVANT D’INSTALLER, UTILISER OU ENTRETENIR CET EQUIPE-

MENT.

Les produits et procédés de soudage peuvent sauser des blessures graves ou la mort, de même que des dommages au reste du matériel et à

la propriété, si l’utilisateur n’adhère pas strictement à toutes les règles de sécurité et ne prend pas les précautions nécessaires.

En soudage et coupage, des pratiques sécuritaires se sont développées suite à l’expérience passée. Ces pratiques doivent être apprises par

étude ou entraînement avant d’utiliser l’equipement. Toute personne n’ayant pas suivi un entraînement intensif en soudage et coupage ne

devrait pas tenter de souder. Certaines pratiques concernent les équipements raccordés aux lignes d’alimentation alors que d’autres s’adr-

essent aux groupes électrogènes.

La norme Z49.1 de l’American National Standard, intitulée “SAFETY IN WELDING AND CUTTING” présente les pratiques sécuritaires à suivre.

Ce document ainsi que d’autres guides que vous devriez connaître avant d’utiliser cet équipement sont présentés à la ﬁn de ces instructions

de sécurité.

SEULES DES PERSONNES QUALIFIEES DOIVENT FAIRE DES TRAVAUX D’INSTALLATION, DE REPARATION, D’ENTRETIEN ET D’ESSAI.

1.04 Dangers relatifs au soudage à l’arc

AVERTISSEMENT

L’ELECTROCUTION PEUT ETRE MORTELLE.

Une décharge électrique peut tuer ou brûler grave-

ment. L’électrode et le circuit de soudage sont sous

tension dès la mise en circuit. Le circuit d’alimenta-

tion et les circuits internes de l’équipement sont aussi

sous tension dès la mise en marche. En soudage

automatique ou semi-automatique avec ﬁl, ce dernier,

le rouleau ou la bobine de ﬁl, le logement des galets d’

entrainement et toutes les pièces métalliques en con-

tact avec le ﬁl de soudage sont sous tension. Un équi-

pement inadéquatement installé ou inadéquatement

mis à la terre est dangereux.

1. Ne touchez pas à des pièces sous tension.

2. Portez des gants et des vêtements isolants, secs et non troués.

3 Isolez-vous de la pièce à souder et de la mise à la terre au moy-

en de tapis isolants ou autres.

4. Déconnectez la prise d’alimentation de l’équipement ou arrêtez

le moteur avant de l’installer ou d’en faire l’entretien. Bloquez

le commutateur en circuit ouvert ou enlevez les fusibles de l’

alimentation aﬁn d’éviter une mise en marche accidentelle.

5. Veuillez à installer cet équipement et à le mettre à la terre selon

le manuel d’utilisation et les codes nationaux, provinciaux et

locaux applicables.

6. Arrêtez tout équipement après usage. Coupez l’alimentation de l’

équipement s’il est hors d’usage ou inutilisé.

7. N’utilisez que des porte-électrodes bien isolés. Ne jamais

plonger les porte-électrodes dans l’eau pour les refroidir. Ne ja-

mais les laisser traîner par terre ou sur les pièces à souder. Ne

touchez pas aux porte-électrodes raccordés à deux sources de

courant en même temps. Ne jamais toucher quelqu’un d’autre

avec l’électrode ou le porte-électrode.

8. N’utilisez pas de câbles électriques usés, endommagés, mal

épissés ou de section trop petite.

9. N’enroulez pas de câbles électriques autour de votre corps.

10. N’utilisez qu’une bonne prise de masse pour la mise à la terre

de la pièce à souder.

11. Ne touchez pas à l’électrode lorsqu’en contact avec le circuit de

soudage (terre).

12. N’utilisez que des équipements en bon état. Réparez ou rem-

placez aussitôt les pièces endommagées.

13. Dans des espaces conﬁnés ou mouillés, n’utilisez pas de source

de courant alternatif, à moins qu’il soit muni d’un réducteur de

tension. Utilisez plutôt une source de courant continu.

14. Portez un harnais de sécurité si vous travaillez en hauteur.

15. Fermez solidement tous les panneaux et les capots.

FABRICATOR 281

SAFETY INSTRUCTIONS 1-6 Manual No. 0-4880B

AVERTISSEMENT

LE RAYONNEMENT DE L’ARC PEUT BRÛLER LES

YEUX ET LA PEAU; LE BRUIT PEUT ENDOMMAGER L’

OUIE.

L’arc de soudage produit une chaleur et des rayons

ultraviolets intenses, susceptibles de brûler les yeux

et la peau. Le bruit causé par certains procédés peut

endommager l’ouïe.

1. Portez une casque de soudeur avec ﬁltre oculaire de nuance ap-

propriée (consultez la norme ANSI Z49 indiquée ci-après) pour

vous protéger le visage et les yeux lorsque vous soudez ou que

vous observez l’exécution d’une soudure.

2. Portez des lunettes de sécurité approuvées. Des écrans latéraux

sont recommandés.

3. Entourez l’aire de soudage de rideaux ou de cloisons pour pro-

téger les autres des coups d’arc ou de l’éblouissement; avertis-

sez les observateurs de ne pas regarder l’arc.

4. Portez des vêtements en matériaux ignifuges et durables (laine

et cuir) et des chaussures de sécurité.

5. Portez un casque antibruit ou des bouchons d’oreille approuvés

lorsque le niveau de bruit est élevé.

AVERTISSEMENT

LES VAPEURS ET LES FUMEES SONT DANGERE-

USES POUR LA SANTE.

Le soudage dégage des vapeurs et des fumées dan-

gereuses à respirer.

1. Eloignez la tête des fumées pour éviter de les respirer.

2. A l’intérieur, assurez-vous que l’aire de soudage est bien ven-

tilée ou que les fumées et les vapeurs sont aspirées à l’arc.

3. Si la ventilation est inadequate, portez un respirateur à adduc-

tion d’air approuvé.

4. Lisez les ﬁches signalétiques et les consignes du fabricant rela-

tives aux métaux, aux produits consummables, aux revêtements

et aux produits nettoyants.

5. Ne travaillez dans un espace conﬁné que s’il est bien ventilé; si-

non, portez un respirateur à adduction d’air. Les gaz protecteurs

de soudage peuvent déplacer l’oxygène de l’air et ainsi causer

des malaises ou la mort. Assurez-vous que l’air est propre à la

respiration.

6. Ne soudez pas à proximité d’opérations de dégraissage, de

nettoyage ou de pulvérisation. La chaleur et les rayons de l’arc

peuvent réagir avec des vapeurs et former des gaz hautement

toxiques et irritants.

7. Ne soudez des tôles galvanisées ou plaquées au plomb ou au

cadmium que si les zones à souder ont été grattées à fond, que

si l’espace est bien ventilé; si nécessaire portez un respirateur à

adduction d’air. Car ces revêtements et tout métal qui contient

SELECTION DES NUANCES DE FILTRES OCULAIRS POUR LA PROTECTION

DES YEUX EN COUPAGE ET SOUDAGE (selon AWS á 8.2-73)

Opération de coupage

ou soudage

Dimension d'électrode ou

Epiasseur de métal ou

Intensité de courant

Nuance

de

ﬁltre

oculaire

Opération de coupage

ou soudage

Dimension d'électrode

ou

Epiasseur de métal ou

Intensité de courant

Nuance de

ﬁltre

oculaire

Brassage tendre

au chalumeau

toutes conditions 2 Soudage á l'arc sous gaz

avec ﬁl plein (GMAW)

Brassage fort

au chalumeau

toutes conditions 3 ou 4 métaux non-ferreux toutes conditions 11

Oxycoupage métaux ferreux toutes conditions 12

mince moins de 1 po. (25 mm) 2 ou 3 Soudage á l'arc sous gaz avec

électrode de tungstène (GTAW)

toutes conditions 12

moyen de 1 á 6 po. (25 á 150 mm) 4 ou 5 Soudage á l'hydrogène

atomique (AHW)

toutes conditions 12

épais plus de 6 po. (150 mm) 5 ou 6 Soudage á l'arc avec

électrode de carbone (CAW)

toutes conditions 12

Soudage aux gaz Soudage á l'arc Plasma (PAW) toutes dimensions 12

mince moins de 1/8 po. (3 mm) 4 ou 5 Gougeage Air-Arc avec

électrode de carbone

moyen de 1/8 á 1/2 po. (3 á 12 mm) 5 ou 6 mince 12

épais plus de 1/2 po. (12 mm) 6 ou 8 épais 14

Soudage á l'arc avec

électrode enrobees

(SMAW)

moins de 5/32 po. (4 mm) 10 Coupage á l'arc Plasma (PAC)

5/32 á 1/4 po. (4 á 6.4 mm) 12 mince moins de 300 amperès 9

plus de 1/4 po. (6.4 mm) 14 moyen de 300 á 400 amperès 12

épais plus de 400 amperès 14

FABRICATOR 281

Manual No. 0-4880B 1-7 SAFETY INSTRUCTIONS

ces éléments peuvent dégager des fumées toxiques au moment

du soudage.

AVERTISSEMENT

LE SOUDAGE PEUT CAUSER UN INCENDIE OU UNE

EXPLOSION

L’arc produit des étincellies et des projections. Les

particules volantes, le métal chaud, les projections de

soudure et l’équipement surchauffé peuvent causer

un incendie et des brûlures. Le contact accidentel de l’

électrode ou du ﬁl-électrode avec un objet métallique

peut provoquer des étincelles, un échauffement ou un

incendie.

1. Protégez-vous, ainsi que les autres, contre les étincelles et du

métal chaud.

2. Ne soudez pas dans un endroit où des particules volantes ou

des projections peuvent atteindre des matériaux inﬂammables.

3. Enlevez toutes matières inﬂammables dans un rayon de 10, 7

mètres autour de l’arc, ou couvrez-les soigneusement avec des

bâches approuvées.

4. Méﬁez-vous des projections brulantes de soudage susceptibles

de pénétrer dans des aires adjacentes par de petites ouvertures

ou ﬁssures.

5. Méﬁez-vous des incendies et gardez un extincteur à portée de la

main.

6. N’oubliez pas qu’une soudure réalisée sur un plafond, un

plancher, une cloison ou une paroi peut enﬂammer l’autre côté.

7. Ne soudez pas un récipient fermé, tel un réservoir ou un baril.

8. Connectez le câble de soudage le plus près possible de la zone

de soudage pour empêcher le courant de suivre un long par-

cours inconnu, et prévenir ainsi les risques d’électrocution et d’

incendie.

9. Ne dégelez pas les tuyaux avec un source de courant.

10. Otez l’électrode du porte-électrode ou coupez le fil au tube-

contact lorsqu’inutilisé après le soudage.

11. Portez des vêtements protecteurs non huileux, tels des gants en

cuir, une chemise épaisse, un pantalon revers, des bottines de

sécurité et un casque.

AVERTISSEMENT

LES ETINCELLES ET LES PROJECTIONS BRULANTES

PEUVENT CAUSER DES BLESSURES.

Le piquage et le meulage produisent des particules

métalliques volantes. En refroidissant, la soudure peut

projeter du éclats de laitier.

1. Portez un écran facial ou des lunettes protectrices approu-

vées. Des écrans latéraux sont recommandés.

2. Portez des vêtements appropriés pour protéger la peau.

AVERTISSEMENT

LES BOUTEILLES ENDOMMAGEES PEUVENT EX-

PLOSER

Les bouteilles contiennent des gaz protecteurs sous

haute pression. Des bouteilles endommagées peuvent

exploser. Comme les bouteilles font normalement par-

tie du procédé de soudage, traitez-les avec soin.

1. Protégez les bouteilles de gaz comprimé contre les sources de

chaleur intense, les chocs et les arcs de soudage.

2. Enchainez verticalement les bouteilles à un support ou à un

cadre ﬁxe pour les empêcher de tomber ou d’être renversées.

3. Eloignez les bouteilles de tout circuit électrique ou de tout soud-

age.

4. Empêchez tout contact entre une bouteille et une électrode de

soudage.

5. N’utilisez que des bouteilles de gaz protecteur, des détendeurs,

des boyauxs et des raccords conçus pour chaque application

spéciﬁque; ces équipements et les pièces connexes doivent être

maintenus en bon état.

6. Ne placez pas le visage face à l’ouverture du robinet de la

bouteille lors de son ouverture.

7. Laissez en place le chapeau de bouteille sauf si en utilisation ou

lorsque raccordé pour utilisation.

8. Lisez et respectez les consignes relatives aux bouteilles de gaz

comprimé et aux équipements connexes, ainsi que la publica-

tion P-1 de la CGA, identifiée dans la liste de documents ci-

dessous.

AVERTISSEMENT

LES MOTEURS PEUVENT ETRE DANGEREUX

LES GAZ D’ECHAPPEMENT DES MOTEURS PEUVENT

ETRE MORTELS.

Les moteurs produisent des gaz d’échappement nocifs.

1. Utilisez l’équipement à l’extérieur dans des aires ouvertes et

bien ventilées.

2. Si vous utilisez ces équipements dans un endroit conﬁné, les

fumées d’échappement doivent être envoyées à l’extérieur, loin

des prises d’air du bâtiment.

AVERTISSEMENT

LE CARBURANT PEUR CAUSER UN INCENDIE OU

UNE EXPLOSION.

Le carburant est hautement inﬂammable.

1. A r r ê t e z l e m o t e u r a v a n t d e vé r i f i e r l e n i v e a u e

carburant ou de faire le plein.

FABRICATOR 281

SAFETY INSTRUCTIONS 1-8 Manual No. 0-4880B

2. Ne faites pas le plein en fumant ou proche d’une source d’étin-

celles ou d’une ﬂamme nue.

3. Si c’est possible, laissez le moteur refroidir avant de faire le

plein de carburant ou d’en vériﬁer le niveau au début du soud-

age.

4. Ne faites pas le plein de carburant à ras bord: prévoyez de l’

espace pour son expansion.

5. Faites attention de ne pas renverser de carburant. Nettoyez tout

carburant renversé avant de faire démarrer le moteur.

AVERTISSEMENT

DES PIECES EN MOUVEMENT PEUVENT CAUSER DES

BLESSURES.

Des pièces en mouvement, tels des ventilateurs, des

rotors et des courroies peuvent couper doigts et

mains, ou accrocher des vêtements amples.

1. Assurez-vous que les portes, les panneaux, les capots et les

protecteurs soient bien fermés.

2. Avant d’installer ou de connecter un système, arrêtez le moteur.

3. Seules des personnes qualifiées doivent démonter des pro-

tecteurs ou des capots pour faire l’entretien ou le dépannage

nécessaire.

4. Pour empêcher un démarrage accidentel pendant l’entretien,

débranchez le câble d’accumulateur à la borne négative.

5. N’approchez pas les mains ou les cheveux de pièces en mouve-

ment; elles peuvent aussi accrocher des vêtements amples et

des outils.

6. Réinstallez les capots ou les protecteurs et fermez les portes

après des travaux d’entretien et avant de faire démarrer le mo-

teur.

AVERTISSEMENT

DES ETINCELLES PEUVENT FAIRE EXPLOSER UN

ACCUMULATEUR; L’ELECTROLYTE D’UN ACCUMU-

LATEUR PEUT BRULER LA PEAU ET LES YEUX.

Les accumulateurs contiennent de l’électrolyte acide et

dégagent des vapeurs explosives.

1. Portez toujours un écran facial en travaillant sur un accumu-

lateur.

2. Arrêtez le moteur avant de connecter ou de déconnecter des

câbles d’accumulateur.

3. N’utilisez que des outils anti-étincelles pour travailler sur un ac-

cumulateur.

4. N’utilisez pas une source de courant de soudage pour charger

un accumulateur ou survolter momentanément un véhicule.

5. Utilisez la polarité correcte (+ et –) de l’accumulateur.

AVERTISSEMENT

LA VAPEUR ET LE LIQUIDE DE REFROIDISSEMENT

BRULANT SOUS PRESSION PEUVENT BRULER LA

PEAU ET LES YEUX.

Le liquide de refroidissement d’un radiateur peut être

brûlant et sous pression.

1. N’ôtez pas le bouchon de radiateur tant que le moteur n’est pas

refroidi.

2. Mettez des gants et posez un torchon sur le bouchon pour l’ôter.

3. Laissez la pression s’échapper avant d’ôter complètement le

bouchon.

1.05 Principales Normes De Securite

Safety in Welding and Cutting, norme ANSI Z49.1, American Weld-

ing Society, 550 N.W. LeJeune Rd., Miami, FL 33128.

Safety and Health Standards, OSHA 29 CFR 1910, Superintendent

of Documents, U.S. Government Printing Ofﬁce, Washington, D.C.

20402.

Recommended Safe Practices for the Preparation for Welding and

Cutting of Containers That Have Held Hazardous Substances, norme

AWS F4.1, American Welding Society, 550 N.W. LeJeune Rd., Miami,

FL 33128.

National Electrical Code, norme 70 NFPA, National Fire Protection

Association, Batterymarch Park, Quincy, MA 02269.

Safe Handling of Compressed Gases in Cylinders, document P-1,

Compressed Gas Association, 1235 Jefferson Davis Highway, Suite

501, Arlington, VA 22202.

Code for Safety in Welding and Cutting, norme CSA W117.2 Asso-

ciation canadienne de normalisation, Standards Sales, 276 Rexdale

Boulevard, Rexdale, Ontario, Canada M9W 1R3.

Safe Practices for Occupation and Educational Eye and Face Protec-

tion, norme ANSI Z87.1, American National Standards Institute,

1430 Broadway, New York, NY 10018.

Cutting and Welding Processes, norme 51B NFPA, National Fire Pro-

tection Association, Batterymarch Park, Quincy, MA 02269.

FABRICATOR 281

Manual No. 0-4880B 2-1 INTRODUCTION

SECTION 2:

INTRODUCTION

2.01 How To Use This Manual

This Service Manual applies to only the speciﬁcation or

part numbers listed on page i.

To ensure safe operation, read the entire manual,

including the chapter on safety instructions and

warnings.

Throughout this manual, the words WARNING,

C A U T I O N , a n d N O T E m a y a p p e a r . P a y

p a r t i c u l a r a t t e n t i o n t o t h e i n f o r m a t i o n

p r o v i d e d u n d e r t h e s e h e a d i n g s . T h e s e

sp ecial an notations a re ea sil y recogn ize d as

follows:

WARNING

A WARNING gives information regarding

possible personal injury.

CAUTION

A CAUTION refers to possible equipment

damage.

NOTE

A NOTE offers helpful information

concerning certain operating procedures.

Additional copies of this manual may be purchased

by contacting Thermadyne at the address and phone

number in your area listed in the inside back cover of

this manual. Include the Service Manual number and

equipment identiﬁcation numbers.

Electronic copies of this manual can also be downloaded

at no charge in Acrobat PDF format by going to the

Thermal Arc web site listed below and clicking on the

Literature Library link:

http://www.thermalarc.com

2.02 Equipment Identiﬁcation

The unit’s identiﬁcation number (speciﬁcation or part

number), model, and serial number usually appear on

a nameplate attached to the rear panel. In some cases,

the nameplate may be attached to the control panel.

Equipment which does not have a name plate such

as gun and cable assemblies is identiﬁed only by the

specification or part number printed on the shipping

container. Record these numbers on the bottom of

page i for future reference.

FABRICATOR 281

INTRODUCTION 2-2 Manual No. 0-4880B

2.03 Symbol Chart

Note that only some of these symbols will appear on your model.

Gas Tungsten Arc

Welding (GTAW)

Air Carbon Arc

Cutting (CAC-A)

Constant Current

Constant Voltage

Or Constant Potential

High Temperature

Fault Indication

Arc Force

Touch Start (GTAW)

Variable Inductance

Voltage Input

Single Phase

Three Phase

Three Phase Static

Frequency Converter-

Transformer-Rectifier

Dangerous Voltage

Off

On

Panel/Local

Shielded Metal

Arc Welding (SMAW)

Gas Metal Arc

Welding (GMAW)

Increase/Decrease

Circuit Breaker

AC Auxiliary Power

Remote

Duty Cycle

Percentage

Amperage

Voltage

Hertz (cycles/sec)

Frequency

Negative

Positive

Direct Current (DC)

Protective Earth

(Ground)

Line

Line Connection

Auxiliary Power

Receptacle Rating-

Auxiliary Power

Art # A-04130

115V 15A

t

t1

t2

%

X

IPM

MPM

t

V

Fuse

Wire Feed Function

Wire Feed Towards

Workpiece With

Output Voltage Off.

Preflow Time

Postflow Time

Spot Time

Spot Weld Mode

Continuous Weld

Mode

Press to initiate wirefeed and

welding, release to stop.

Purging Of Gas

Inches Per Minute

Meters Per Minute

Welding Gun

Burnback Time

Press and hold for preflow, release

to start arc. Press to stop arc, and

hold for preflow.

4 Step Trigger

Operation

2 Step Trigger

Operation

FABRICATOR 281

Manual No. 0-4880B 2-3 INTRODUCTION

2.04 General Information

The Fabricator 281 is a 208-230 Volt MIG machine with

a best in class performance of 300 Amp maximum

output @ 40% duty cycle, 24 voltage steps, digital

meter and dual cylinder racks. The completely separate

wirefeeder system has 26ft (8m) interconnection cables,

spool gun operation on demand and spot/stitch timers.

The wirefeeder, with ﬁtted wheels, conveniently ﬁts on

a pivot mount on top of the power source or can be

lifted off the pivot and carried up on top of equipment

or machinery up to 26 feet away. Additionally, the spool

gun connects to the wirefeeder allowing even further

distance. The Fabricator 281 is an extremely versatile all

round performer in its class.

The Fabricator 281 gives excellent performance on

mild steel, stainless steel, aluminum, silicon bronze

and some hard facing wires with Argon based shielding

gases. The Power Supply also gives excellent results on

mild steel using Carbon Dioxide shielding gas.

The Fabricator 281 is supplied as a complete package

ready to weld (apart from gas cylinder and electrode

wire). The following instructions detail how to correctly

set up the welder and give guidelines on gaining the

best production efficiency from the Power Supply.

Please read these instructions thoroughly before using

your Fabricator welder.

2.05 Safety

The following basic safety rules should always be

followed:

• Ensure the machine is correctly installed, if

necessary, by a qualiﬁed electrician.

• Ensure the Power Supply is grounded correctly

(electrically) in accordance with local regulations.

• Excessive heat in the welding cables may cause

ﬁre. Never weld with poor electrical connections,

damaged welding cables or exceed the welding

cable current rating as this will produce excessive

heat and may cause a ﬁre.

• Always wear the correct protective clothing for

protection from sparks, molten particles and arc

rays.

• When welding in conﬁned spaces, always ensure

adequate ventilation and constant observation of

the operator.

• Keep combustible materials away from the

welding area. Have a suitable fire extinguisher

handy.

• Never watch the welding arc with naked eyes.

Always use and wear a welding mask ﬁtted with

the correct ﬁlter lens.

• Do not stand on damp ground when welding.

For more complete safety advice please read section 1.

2.06 Protective Filter Lenses

Protective filter lenses are provided to reduce the

intensity of radiation entering the eye thus ﬁltering out

harmful infrared, ultraviolet radiation and a percentage

of the visible light. Such ﬁlter lenses are incorporated

within face shields. To prevent damage to the filter

lenses from molten or hard particles an additional hard

clear glass or special plastic external cover lens should

be used. This cover lens should always be kept in place

and replaced before the damage impairs your vision

while welding.

Table 2-1: Filter lens size versus welding current

It is recommended to use a welding helmet, conforming

to the local relevant Standards when electric arc

welding. Use a welding helmet in serviceable condition

with the correct ﬁlter lens. Refer to Table 2-1 above and

AWS table in Section 1.

FABRICATOR 281

INTRODUCTION 2-4 Manual No. 0-4880B

2.07 User Responsibility

This equipment will perform as per the information

contained herein when installed, operated, maintained

and repaired in accordance with the instructions

provided. This equipment must be checked periodically.

Defective equipment (including welding leads) should

not be used. Parts that are broken, missing, plainly

worn, distorted or contaminated, should be replaced

immediately. Should such repairs or replacements

become necessary, it is recommended that such repairs

be carried out by appropriately qualified persons

approved by Thermal Arc Advice in this regard can be

obtained by contacting Thermal Arc.

This equipment or any of its parts should not be

altered from standard specification without prior

written approval of Thermal Arc. The purchaser of

this equipment shall have the sole responsibility for

any malfunction which results from improper use or

unauthorized modiﬁcation from standard speciﬁcation,

faulty maintenance, damage or improper repair by

anyone other than appropriately qualified persons

approved by Thermal Arc.

Wire Drive Speciﬁcations

Control Circuit Supply 30VA @ 32VAC

Wire Motor Supply 216VA @ 36VAC

Wire Speed Range 80 to 800 ipm

(2 to 20 m/min)

Wire Diameter .023"

(0.6mm)

.030"

(0.8mm)

.035"

(0.9mm)

.045"

(1.2mm)

1/16"

(1.6mm)

Mild Steel: Y Y Y Y

Stainless Steel: Y Y Y Y

Aluminum: Y Y Y Y

Flux Cored: Y Y Y Y

Wire Spool Size Capacity 44 lb, 33 lb, 10 lb, 8" and 12" wire spool sizes.

Table 2-3: Wire Drive Speciﬁcations

2.08 Duty Cycle

The rated duty cycle of a welding Power Supply is

the operating time it may be used at its rated output

current without exceeding the temperature limits of the

insulation of the component parts. To explain the ten

minute duty cycle period the following example is used.

Suppose a welding Power Supply is designed to operate

at 50% duty cycle, 250 amperes at 28 volts. This means

that it has been designed and built to provide the rated

amperage (250A) at the rated load voltage (28V), for

5.0 minutes out of every 10 minute period (50% of 10

minutes is 5.0 minutes). During the other 5.0 minutes

of the 10 minute period the Power Supply must idle and

be allowed to cool. The thermal cutout will operate if the

duty cycle is exceeded.

2.09 Speciﬁcations

MIG Gun Speciﬁcations

Gun Catalog Number 43340

Gun Type TWECO Weldskill 300 Amp

Gun Cable Length 15 ft (4.5m)

Table 2-2: MIG Gun Speciﬁcations

Fabricator 281

Manual No. 0-4880B 2-5 INTRODUCTION

Package System Part Number W1001600

Power Source Part Number 707300

Power Source Weight 249 lb (113kg)

Dimensions HxWxD

(including wheels and cylinder rack and wire

feeder)

58” x 27.2” x 36.8”

(1473 x 691 x 935mm)

Nominal Input Voltage 208V 230V

Number of Phases 1Ø

Frequency 60 Hz

Flexible Supply Cable Size

Supply Plug

10ft (3m) 8AWG

NEMA 6-50P

Rated Input Current @ 100% Duty Cycle * 36A * 32.6A

Rated kVA @ 100% Duty Cycle 7.5 kVA 7.5 kVA

Maximum Input Current @ 250A Output 68A 62A

Generator Requirements 20 kVA 20 kVA

Supply VA @ Maximum Output 15 kVA 15 kVA

Recommended Primary Circuit Size 50A 50A

Recommended Minimum Primary Fuse Size ** 70A ** 70A

Open Circuit Voltage Range 15.6 – 45.9V DC 15.6 – 45.9V DC

Welding Arc Voltage Range 14.5 – 31.7V DC 14.5 – 31.7V DC

Output Current Range 20 – 300A DC 20 – 300A DC

Rated Output Duty Cycle @ 104ºF 250A/26.5V @ 60% 250A/26.5V @ 60%

Maximum Duty Cycle @ 104ºF 300A/29.0V @ 40% 300A/29.0V @ 40%

100% Duty Cycle Output Rating @ 104ºF 195A DC at 24V 195A DC at 24V

Duty Cycle Period 10 minutes

Number of Output Voltage Values 24

Electrode Wire Type and Diameter

Mild / Stainless Steel .023” (0.6mm) – .045” (1.2mm)

Aluminum .030” (0.8mm) – 1/16” (1.6mm)

Flux Cored .030” (0.8mm) – 1/16” (1.6mm)

Wire Feed Speed Range 80 – 800 ipm (2 – 20 m/min )

Wire Spool Size Diameter 8” / 12” (200mm / 300mm)

Burn-Back Timer Range 0 – 0.6 seconds

Burn-Back Time Factory Set to 0.16 seconds

Spot Timer Range 0.5 – 9 seconds

Dwell Timer Range 1 – 12 seconds

Stitch Weld Time Weld (Stitch) Time 0.5 – 9 seconds

Dwell (non-weld) Time 1 – 12 seconds

Thermal Protection Self-resetting thermostat ﬁtted to rectiﬁer and

transformer

Operating Temperature Range 32° to 104°F (0° to 40°C)

* The Rated Input Current should be used for the determination of cable size & supply

requirements.

** Motor start fuses or thermal circuit breakers are recommended for this application. Check

local requirements for your situation in this regard.

Table 2-4: Machine Speciﬁcations

FABRICATOR 281

INTRODUCTION 2-6 Manual No. 0-4880B

2.10 Included Items

Fabricator 281 Package System Contents

A2281 Wire Feeder with 26 ft (8m) Interconnection leads

Factory Fitted Wheeling Kit

Factory Fitted Dual Cylinder Rack

Factory Fitted Primary Power Cable 8AWG, 10ft (3m) with

Plug NEMA 6-50P

Work Lead 26 ft (8m)

Cable Storage Hooks

Gas Regulator/Flowmeter – Argon Mix Gases

Tweco Weldskill MIG Gun 300 Amp, 15ft (4.5m)

Fitted Feed Roll for .035” - .045” (0.9 – 1.2mm) solid wire

Table 2-5: Power Supply Contents

2.11 Optional Accessories

Refer to the Appendix section of this manual for the list of available options and accessories for this product.

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ESAB 281 FABRICATOR® Mig Welding Machine Manuel utilisateur

ESAB 281 FABRICATOR® Mig Welding Machine Manuel utilisateur

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