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5

WARNING:

 T

hese Safety Precautions are for

your protection. They summarize precaution-
ary information 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 pro-
cesses are noisy and require ear pro-
tection. The arc, like the sun, emits ul-
traviolet (UV) and other radiation and

can injure skin and eyes.  Hot metal can cause burns.
Training in the proper use of the processes and equip-
ment 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 bystanders 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 weld-
ing 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

grinding. 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 ex-
plosions. 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 pro-
duce 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,

overloaded 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 neces-
sary.

7. For additional information, refer to NFPA Standard 51B,

"Fire Prevention in Use of Cutting and Welding Pro-
cesses", available from the National Fire Protection As-

sociation, 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 move-

ment 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 dam-

aged cables.

5. Keep everything dry, including clothing, 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 mis-
take the work lead for a ground cable.

ELECTRIC AND MAGNETIC FIELDS —
May be dangerous. Electric current flow-
ing through any conductor causes lo-
calized Electric and Magnetic Fields
(EMF). Welding and cutting current cre-
ates EMF around welding cables and
welding machines. Therefore:

1. Welders having pacemakers should consult  their physi-

cian before welding. EMF may interfere with some pace-
makers.

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

unknown.

3. Welders should use the following procedures to mini-

mize 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.

SECTION 1

SAFETY PRECAUTIONS

Содержание MIGMASTER 250

Страница 1: ...F15 087 J 04 2003 MigMaster 250 Welding Package Instruction Manual...

Страница 2: ...ten request to ESAB WELDING CUTTING PRODUCTS ATTN LITERATUREDEPT 411 S EBENEZER ROAD FLORENCE SC 29501 USER RESPONSIBILITY This equipment will perform in conformity with the description thereof contai...

Страница 3: ...NNECTIONS 18 3 4 TORCH CONNECTIONS 18 3 5 WIRE FEEDER MECHANISM 18 3 6 CONNECTION OF THE SHIELD GAS 19 3 7 WELDING CABLE CONNECTIONS 20 3 8 ASSEMBLE REAR WHEELS 20 3 9 INSTALLINGOPTIONALSPOT STITCH AN...

Страница 4: ...4 TABLE OF CONTENTS...

Страница 5: ...stances on the workpiece which might pro duce 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 gar...

Страница 6: ...strike an arc on a cylinder 5 For additional information refer to CGA Standard P 1 Precautions for Safe Handling of Compressed Gases in Cylinders which is available from Compressed Gas Association 12...

Страница 7: ...extintor de fuego para uso instant neo como por ejemplo una manguera con agua cubeta con agua cubeta con arena o extintor port til Aseg rese que usted esta entrenado para su uso 5 No use el equipo fue...

Страница 8: ...de protecci n sobre la v lvula si el regulador no est conectado Asegure y mueva los cilindros utilizando un carro o transporte adecuado Evite el manejo brusco de los Las siguientes publicaciones dispo...

Страница 9: ...asse l ossature du b timent ou en un point loign de la zone de travail augmente en effet le risque de passage d un courant de sortie par des cha nes de AVERTISSEMENT Ces r gles de s curit ont pour obj...

Страница 10: ...rticuli res en mati re de ventilation indiqu es l alin a 6 de la norme Z49 1 de l AWS 5 ENTRETIEN DE L QUIPEMENT Un quipement entretenu de fa on d fectueuse ou inad quate risque non seulement de r ali...

Страница 11: ...lding machine components Machine ventilation is not drawn through this compartment thus helping to keep the wire and feeding mechanism clean II INTRODUCTION 2 1 GENERAL This manual has been prepared e...

Страница 12: ...5 CONTROLS TheMigmaster250Systemcanbeusedtoweldhardand aluminum wire with an optional ST 23A spool gun torch An optional spot stitch control allows a welder to spot or stitchweldwithinarangeof0 4to3...

Страница 13: ...2S Spotweld Nozzle P N 999625 2 4 2DIGITALVOLT AMMETERMODULE P N32857 This easy to install plug in module mounts in place of the top blank cover plate of the upper right front panel location in the 25...

Страница 14: ...to misuse orimproperweldingapplications Thesymbol which precedes safety notes appear ingthroughoutthismanualmeans Attention BeAlert Your safety is involved The definitions relating to the DANGER WARNI...

Страница 15: ...completely under the base Do not operate the machine without the running gearinstalled 3 2ELECTRICALINPUTCONNECTIONS It is recommended that a line disconnect switch be installed in the input circuit...

Страница 16: ...phscover the procedure to switch the voltage tap for either 208vac or230vacinput 3 2 2InputConductorConnections The input power cord on 208 230 Volts primary input model is provided with an attachment...

Страница 17: ...will resultinanelectricallyhotweldingmachinechassis 3 2 3 Connecting FOR 208 VAC INPUT After the panel is removed locate the 208 Vac lead Fig 3 3B and cut the tie wrap to remove the insulation sleevi...

Страница 18: ...cted to the welding polarity D C Reverse or D C Straight via the secondaryoutputterminalslocatedinsidethewirefeed ing compartment see Fig 4 1 The machine comes set up for D C R P welding as described...

Страница 19: ...er and cause sticking D Lower pressure roll assembly and secure Check that the gears mesh Feed wire through to gun tip with gun trigger power ON OUTLET CONNECTION CYLINDER PRESSURE GAUGE f Attach the...

Страница 20: ...ectric shock Welding cables should be kept as short as possible and be of adequate current carrying capacity Resistance of the welding cables and connections causes a voltage drop which is added to th...

Страница 21: ...untingscrews b Locate the harness connected 10 pin plastic plug PL1 inside the mounting cavity This plug does not have a jumper plug connected to it c Connect the 10 pin plug into the matching recep t...

Страница 22: ...22 SECTION 3 INSTALLATION...

Страница 23: ...n 18 and 56 volts DC when the secondary contactor is energized 4 1 2 VOLTAGE CONTROL Coarse Range Selector and Fine Adjustment Range Selector Voltage control is by means of two high current tap switch...

Страница 24: ...he charged capacitor bank in the secondary circuit the output voltage will take a few seconds before falling to zero volts The gas valve shuts off when the contactor opens The Migmaster 250 is equippe...

Страница 25: ...s weld mode center position for mig seam welding B Setthe Anti StickTime asrequired see4 2 3 1 IMPORTANT Always make sure that the plasticplug is screwed back into the adaptor when the ST 23A gas powe...

Страница 26: ...e arc will be ON for each sequence by adjusting the Spot Stitch Weld Time control on the power supply s front panel This timerhasanapproximaterangeoffrom0 4seconds at the minimum setting to 3 5 second...

Страница 27: ...ene and perchlorethylene to form phosgene evenwhenthesevaporsarepresentinlowconcen trations DONOTweldwherechlorinatedsolvents are present in atmospheres in or around the arc C DONOTtouchtheelectrode n...

Страница 28: ...ove loose surface rust scale or paint with wire brush or sander b Attempting to weld over grease or oil can cause welddefects c Before welding on aluminum be sure to clean surfacethoroughlyusingastain...

Страница 29: ...g either up or down it is very important to keep the arc on the leading edge of the puddle to ensure complete pen etration G Some welders who are accustomed to welding with stick electrodes may tend t...

Страница 30: ...nt is provided with a thermostat OL in the transformer T1 windingswhichwillopenandpreventthe contactor CON fromclosingifthetransformerwindings areoverheated Ifthethermostatopens allowtheequip ment to...

Страница 31: ...dwareincludingelectrical connection Loose power connections overheat during welding Immediately replace all worn or damaged power cables andconnectors Checkforfrayedandcrackedinsulation particularly i...

Страница 32: ...e necessary to replace this or any other fuse in the welding machine ensure that the proper size fuse is used as a replacement 5 2 1 5OVER TEMPERATUREPROTECTION The machine is equipment with a thermos...

Страница 33: ...an appropriate instrument Do not make any repairs to equipment unless you are fully qualified as described in the maintenance section TABLEII TROUBLESHOOTINGGUIDE WELDCONDITION POSSIBLECAUSE REMEDY 1...

Страница 34: ...er d Check flow at outlet replace faulty item e Faulty gas solenoid valve SOL e Replace solenoid valve f Wrong polarity f Check polarity 10 Shield gas flow low or a Cylinder valve closed a Turn off re...

Страница 35: ...leads but motor does not run check motor gears and commutator areas b Power switch S3 and fuses b With S3 ON if voltage across terminal 1 and 3 is 24 VAC switch and fuses are good c Speed Potentiomet...

Страница 36: ...sition mumbers refer to numbers on back of switch NOTE Recent modifications to the power source may not be reflected in this schematic For up to date information on your model refer to the schematic o...

Страница 37: ...r source may not be reflected in this schematic For up to date information on your model refer to the schematic on the inside cover of the power source or contact the factory D 33310 C PRIMARY VOLTAGE...

Страница 38: ...38 Figure 5 3 Wiring Migmaster 250 for 208 230 V Model D 32861 F...

Страница 39: ...39 Figure 5 4 Wiring Migmaster 250 for 208 230 380 400 460 575 V Model D 33311 D...

Страница 40: ...40 SECTION 5 SERVICE...

Страница 41: ...idualparts These parts are listed indented one space below the assem bly When any of the parts can be broken down as a sub assembly its individual parts as listed below it indented two spaces Attachin...

Страница 42: ...KNOB 13 1 32818 SWITCH FINE VOLTS ADJ 8 POS S1 14 2 2062171 KNOB 15 1 647233 RECEPTACLE 8 PIN J3 16 2 2062171 KNOB w SET SCREW 17 1 32902 SWITCH COARSE VOLTS ADJ 3 POS S2 18 1 951069 PLUG PLASTIC C S...

Страница 43: ...43 FIGURE 6 2 MiGMASTER 250 Main Assembly Left Side 19 20 15 16 22 23 5 25 FAN ASSEMBLY See Figure 6 4 7 17 18 14 12 8 6 4 26 1 21 24 SECTION 6 REPLACEMENT PARTS...

Страница 44: ...HING 14 1 31484 P C BOARD SPEED CONTROL PCB1 15 1 2360 8111 TERMINAL BLOCK 8 PT TB1 16 1 1373 5940 MARKER TERMINAL 17 2 950760 RELAY from 1 1 94 K2 K3 2361 0322 RELAY 4 PDT 24 VAC 10A 18 1 1373 0469 B...

Страница 45: ...45 1 2 3 5 6 7 11 19 14 18 16 9 10 20 FIGURE 6 3 MiGMASTER 250 Main Assembly Right Side SECTION 6 REPLACEMENT PARTS...

Страница 46: ...1 634709 HOLDER FUSE 9 1 2361 2348 GEAR MOTOR 50 675 IPM 10 1 2361 2479 KEY MOTORSHAFT 11 1 33199M COVER P C BOARD 14 1 952939 DRIVE STAND ASSEM See Fig 6 6 15 1 82F31 WORKCLAMP 16 1 1373 2232 FILTER...

Страница 47: ...0 1 1373 2226 MOTOR FAN M1 3 2 1 7 6 5 4 8 9 FIGURE 6 5a MIGMASTER 250 LEXAN HUB KIT ITEM QTY PART CKT NO REQ NO DESCRIPTION HUBKIT DESIG 2360 5780 REEL HUB KIT INCLUDES 1 8 1 1 2360 0255 BRAKE DISC 2...

Страница 48: ...375 4 1 0558002992 Bracket Spool Support 5 1 33191M Shelf Silkscreened 6 AR 63300916 Nut Hex 10 24 7 AR 64302920 Washer Lock 8 8 2 948255 Pad Braking 9 1 2360 0982 Spring 10 1 634347 Pin Hitch Clip 1...

Страница 49: ...ESSURE DEVICE ASSY 10 1 23612473 LOCATINGPIN 11 1 23612461 INLETGUIDE 12 1 21156 DRIVE ROLL see Table 2 1 13 1 952944 ADAPTORDRIVEROLL 14 1 952925 FEED ROLL THUMB SCREW 15 1 23612478 FEED PLATE 16 1 3...

Страница 50: ...23612478 Feed Plate 106 1 23612461 Inlet Guide 035 045 Also see Table 1 3 107 5 23612462 MTG Screw Drive Stand 108 1 952944 Feed Roll Adaptor See Table 1 3 for Drive Rolls 109 2 23612384 Locating Scre...

Страница 51: ...REROLL 9 1 23612460 PRESSURE DEVICE ASSY 10 1 23612473 LOCATINGPIN 11 1 23612461 INLETGUIDE 12 1 21156 DRIVE ROLL see Table 2 1 13 1 23612383 GEAREDADAPTORDRIVEROLL 14 1 23612398 FEEDROLLRETAININGSCRE...

Страница 52: ...52 SECTION 6 REPLACEMENT PARTS...

Страница 53: ...53 NOTES...

Страница 54: ...NOTES...

Страница 55: ...t parts list of Figure 6 2 5 Changed the drive stand from 23612627 to 952939 6 Added parts call out Figure 6 7 for drive stand with driven upper pressure roll 23612627 The H edition 12 00 of this manu...

Страница 56: ...rranty Returns Authorized Repair Stations WeldingEquipmentTroubleshooting C TECHNICAL SERVICE Telephone 800 ESAB 123 Fax 843 664 4452 Hours 8 00 AM to 5 00 PM EST Part Numbers Technical Applications S...

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