Rätt till ändring av specifikationer utan avisering förbehålles.
Ret til ændring af specifikationer uden varsel forbeholdes.
Rett til å endre spesifikasjoner uten varsel forbeholdes.
Oikeudet muutoksiin pidätetään.
Rights reserved to alter specifications without notice.
Änderungen vorbehalten.
Sous réserve de modifications sans avis préalable.
Recht op wijzigingen zonder voorafgaande mededeling voorbehouden.
Reservado el derecho de cambiar las especificaciones sin previo aviso.
Ci riserviamo il diritto di variare le specifiche senza preavviso.
Reservamo--nos o direito de alterar as especificações sem aviso prévio.
SPARE PARTS LIST179...................................................
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1DIRECTIVE
DECLARATION OF CONFORMITY
Esab Welding Equipment AB, 695 81 Laxå, Sweden, gives its unreserved guarantee
that automatic welding machine A2 SFE1 / A2 SGE1 from serial number 740 complies with standard EN 60292, in accordance with the requirements of directive
(89/392/EEA) and addendum.
Paul Karlsson
Managing Director
Esab Welding Equipment AB
695 81 LAXÅ
SWEDENTel: + 46 584 81000Fax: + 46 584
12336
2SAFETY
Users of ESAB automatic welding machines have ultimate responsibility for ensuring that anyone who
works on or near the equipment observes all the relevant safety precautions.
The following recommendations should be observed in addition to the standard regulations that apply
to the work place.
All work must be carried out according to the specified instructions by personnel who are thoroughly
familiar with the operation of the welding machine.
Incorrect or unintentional operation of the equipment may lead to a hazardous situation which can
result in injury to the operator and damage to the equipment.
1.Anyone who uses the automatic welding machine must be familiar with:
Sits operation
Sthe location of emergency stops
Sits function
Srelevant safety precautions
2.The operator must ensure that:
Sno unauthorized person is stationed within the working area of the machine when it is started
up.
Sthat no--one is in a hazardous position when the carriage or slide mechanisms are operated.
3.The work place must:
Sbe clear of mechanical components, tools, or other obstructions that could prevent the oper-
ator from moving freely within the working area.
Sbe organized so that there is free access to the emergency stop.
4.Personal safety equipment
SAlways wear recommended personal safety equipment, such as safety glasses, flame--proof
clothing, safety gloves.
SDo not wear loose--fitting items, such as scarves, bracelets, etc., which could become
trapped.
5.General precautions
Live electrical components are normally shielded from accidental contact.
SMake sure the return cable is connected securely.
SWork on high voltage components may only be carried out by a qualified electrician.
SAppropriate fire extinguishing equipment must be clearly marked and close at hand.
SLubrication and maintenance must not be carried out on the equipment during its operation.
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WARNING
ARC WELDING AND CUTTING CAN BE INJURIOUS TO YOURSELF AND OTHERS. TAKE PRECAUTIONS WHEN WELDING. ASK FOR YOUR EMPLOYER’S SAFETY PRACTICES WHICH SHOULD BE
BASED ON MANUFACTURERS’ HAZARD DATA.
ELECTRIC SHOCK -- Can kill
SInstall and earth the welding unit in accordance with applicable standards.
SDo not touch live electrical parts or electrodes with bare skin, wet gloves or wet clothing.
SInsulate yourself from earth and the workpiece.
SEnsure your working stance is safe.
FUMES AND GASES -- Can be dangerous to health
SKeep your head out of the fumes.
SUse ventilation, extraction at the arc, or both, to keep fumes and gases from your breathing zone and
the general area.
ARC RAYS -- Can injure eyes and burn skin.
SProtect your eyes and body. Use the correct welding screen and filter lens and wear protective
clothing.
SProtect bystanders with suitable screens or curtains.
FIRE HAZARD
SSparks (spatter) can cause fire. Make sure therefore that there are no inflammable materials nearby.
NOISE -- Excessive noise can damage hearing
SProtect your ears. Use ear defenders or other hearing protection.
SWarn bystanders of the risk.
MALFUNCTION -- Call for expert assistance in the event of malfunction.
READ AND UNDERSTAND THE INSTRUCTION MANUAL BEFORE INSTALLING OR OPERATING.
PROTECT YOURSELF AND OTHERS!
3INTRODUCTION
3.1General
All the automatic welding machines included in this instruction manual are designed
for SAW and MIG/MAG welding of butt and fillet joints.
ESAB’s welding heads are of the A2 S type and are intended for use in combination
with A2--A6 Process Controller and ESAB’s welding power sources LAF and TAF.
The welding head can be positioned horizontally and vertically with the linear slides.
The angular position is adjusted with the angular slide.
3.2Definitions
SAW weldingThe weld bead is protected by a cover of flux during the
welding.
SAW Light dutyPermits welding with lower current load and thinner wire.
MIG/MAG weldingThe weld bead is protected by shielding gas during wel-
ding.
Tandem weldingWelding with two welding heads.
Twinarc weldin gWelding with two wires in the same welding head.
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3.3Technical data
A2 SFE1A2 SGE1
Submerged--arcMIG/MAG
LD D20
Rated load 100%800 AAC/DC600 A AC/DC
Wire dimensions:
solid single wire1.6--4.0 mm0.8--2.5 mm
flux--cored wire1.6--4.0 mm1.2--3.2 mm
twin wire2x1.2--2.0 mm--
Wire feed speed0.2--9.0 m/min0.2--16 m/min
Brake drum braking torque1.5 Nm1.5 Nm
Max weight, wire2x30 kg2x30 kg
Flux hopper capacity
(Must not be filled with preheated flux)
Weight (flux and wire excluded)50 kg15 kg
Sideways tilt, max.25_25_
6l--
Setting length of slide *
manual drive
*) NB! Other lengths on request.
90 mm90 mm
3.4Welding method
Submerged arc welding (SAW)
For submerged arc welding, the A2 SF welding head is always to be used.
SSubmerged arc Light duty
Submerged arc light duty, with a 20 mm connector, which permits a load of up
to 800 A (100%).
This version can be equipped with feed rollers for single or twin wire welding
(twin--arc). A special knurled feed roller is available for flux--cored wire, which
guarantees even wire feed without the risk of deformation due to high feed pressure.
MIG/MAG welding
For MIG/MAG welding the A2 SG welding head is always used, permitting a max.
load of 600 A. The welding head is water--cooled, with the cooling water supplied by
hoses from connections intended for the purpose.
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3.5Equipment
The complete welding head includes a feed motor for the wire feed and contact
equipment supplying current to the wire and ensuring good contact.
The contact equipment is available in different versions.
SA2 SF is used for Submerged arc welding.
SA2 SG is used for MIG/MAG welding.
Example -- A2 SFE1
1.Wire straightener
2.Contact equipment consisting of
contact tip, connector and flux tube
3.Angular slide
4.Slide
5.Feed motor
6.Wire drum
7.Flux hopper (may be fitted with a cyclone)
Example -- A2 SGE1
1.Wire straightener
2.Contact equipment consisting of
connector, gas nozzle and water
hoses.
3.Angular slide
4.Slide
5.Feed motor
6.Wire drum.
7.Fine--wire straightener
8.Wire guide
Connection instructions for SAW and MIG/MAG welding appear from the system
diagram on page 64.
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4INSTALLATION
4.1General
Installation shall only be performed by qualified personnel.
WARNING!
Rotating parts can cause injury, take great care.
4.2Mounting
The automatic welding machines can easily be fitted on a rail--borne carriage or on a
column and boom unit with 4 screws.
4.3Connections
1.The connection of the A2--A6 Process Controller (PEH) to the welding machine
shall be done according to the connection instructions in the A2--A6 Process
Controller (PEH) service manual.
For further information, see instruction manual for the A2--A6 Process Controller
(PEH).
2.Connect the A2 welding heads as follows:
SUBMERGED ARC WELDING (SAW)
SConnect the control cable (7) between the welding power source (8) and the
A2--A6 Process Controller (PEH) (2).
SConnect the return cable (11) between the welding power source (8) and the
work piece (9).
SConnect the welding cable (10) between the welding power source (8) and
the automatic welding machine (1).
SConnect the measuring cable (12) between the welding power source (8)
and the work piece (9).
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GAS METAL ARC WELDING (MIG/MAG)
SConnect the control cable (7) between the welding power source (8) and the
A2--A6 Process Controller (PEH) (2).
SConnect the return cable (11) between the welding power source (8) and the
work piece (9).
SConnect the welding cable (10) between the welding power source (8) and
the automatic welding machine (1).
SConnect the gas hose (5) between the reduction valve (6) and the gas valve
on the automatic welding machine (13).
SConnect the hoses for cooling water (3) between the cooling unit (4) and the
automatic welding machine (1).
SConnect the measuring cable (12) between the welding power source (8)
and the work piece (9).
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5OPERATION
5.1General
General safety regulations for the handling of the equipment appear from
page 60. Read through before you start using the equipment!
SSelect wire type and flux powder or shielding gas so that the weld material is as
close as possible to the analysis of the base metal. Select wire size and welding
data in accordance with the values recommended by the welding materials
supplier.
SThorough preparation of the weld surfaces is necessary to achieve a good weld.
NOTE! The width of the weld joint gap must be uniform.
STo minimise the risk of heat crack formation, the width of the weld must be
greater than the penetration depth.
SAlways carry out a test weld with the same joint type and sheet thickness as the
production work piece.
SFor control and adjustment of the automatic welding machine and welding power
supply, see the instruction manual for the A2--A6 Process Controller (PEH).
SWhen changing consumables, see table on page 178.
5.2Starting work
Loading the welding wire
SRemove the wire drum (1) from the brake hub (2)
and take off the side plate (3).
SLocate the wire reel on the wire drum (1).
SCut off the binding wires from around the
wire reel.
SReplace the side plate (3).
SReplace the wire drum (1) on the brake hub (2).
Check that the carrier (4) is in the correct position.
NOTE! The maximum angle for the wire bobbin is 25q.
At extreme angles, wear will occur on the brake hub locking
mechanism and the wire bobbin will slide off the brake hub.
IMPORTANT!
To prevent the reel sliding off the hub: Lock the reel in place
by turning the red knob as shown on the warning label attached next to the
hub.
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SAWMIG/MAG
SCheck that the feed roller (1) and contact jaw or contact tip (3) are of the correct
dimension for the selected wire size.
SPull the end of the wire through the straightener (2). For a wire diameter greater
than 2 mm; straighten out 0.5 m of wire and feed it by hand down through the
straightener.
SLocate the end of the wire in the feed roller (1) groove.
SSet the wire tension on the feed roller with the knob (7). Note! Do not tension
more than is required to achieve an even feed.
SFeed the wire forward 30 mm by pressing
on the control box A2--A6
Process Controller.
SDirect the wire by adjusting the knob (6).
For fine wire, the special fine--wire straightener (4) is used for both single and
twin wire.
Ensure that the straightener is correctly adjusted so that the wire emerges
straight out through the contact jaws or contact tip.
Always use a guide tube (5) to ensure even feed of fine wire (1.6 -- 2.5 mm).
For MIG/MAG welding with wire sizes < 1.6 mm , use a guide spiral, which is
inserted in the guide tube (5).
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Changing the feed roller
SSingle wire
SRelease the knobs (3) and (4).
SRelease the hand wheel (2).
SChange the feed roller (1). They are marked with their
respective wire sizes.
STwin wire (Twin--arc)
SChange the feed roller (1) with twin grooves in the same way as for single
wire.
SNOTE! T he pressure roller (5) must also be changed. A special curved
pressure roller for twin wire replaces the standard pressure roller for single
wire.
SAssemble the pressure ro ller with special stub shaft
(order no. 0146 253 001).
SFlux--cored wire (for knurled rollers)
SChange the feed roller (1) and pressure roller (5) as a pair for the wire size
to be used. NOTE! A special stub shaft is required for the pressure roller
(order no. 0212 901 101).
STighten the pressure screw (4) with moderate pressure to ensure that the
flux--cored wire does not deform.
Contact equipment for Submerged arc welding
SFor single wire 3.0 -- 4.0 mm. Light duty (D20)
Use the straightener (3), connector (1) D20 with
contact tip (2) (M12 thread).
STighten the contact tip (2) with a key in order to ensure
that a good contact is achieved.
SFor single wire 1.6 -- 2.5 mm Submerged--arc
Light duty (D20)
Use the straightener (3), connector (1) D20 with contact
tip (2) (M12 thread) and separate fine--wire straightener (4)
with guide tube (6).
SAssemble the clamp (7) with guide tube (6) in the M12
hole on the straightener (3). The guide tube (6) should
bottom on the contact tip (2).
SIf necessary, cut the guide tube (6) to length so that the
feed roller (5) runs freely.
SAssemble the fine--wire straightener (4) on the upper
Use the straightener (3), connector (1) D35 with
twin adapter (9) and 2 contact tips (2) (M6 threads)
and separate fine--wire straightener (4) with two guide
tubes (6). For twin wires <1.6 mm, a guide spiral,
inserted into each guide tube, is used.
SAssemble the twin adapter (9) for M6 contact tips (2)
with the M5 bolts in the fixed half of the two--piece
connector (1).
SAssemble the clamp (7) with guide tube (6) in the M12 hole
on the standard straightener (3). The guide tube should
bottom on the twin adapter (9) for the contact tip (2).
STighten the contact tip (2) with a key to ensure that good
contact is achieved.
SIf necessary, cut the guide tube (6) to length so that the
feed roller (5) runs freely.
SAdjustment o f the wires for Twin--arc weld in g :
SPosition the wires in the joint so as to achieve optimal weld quality by
rotating the connector. The two wires can be rotated so that they are
positioned one after the other along the line of the joint, or in any position
up to 90q across the joint, i.e. one wire on each side of the joint.
Contact equipment for MIG/MAG welding
SFor single wire 1.6 -- 2.5 mm (D35)
Use the straightener (3), connector (1) D35 with contact
tip (2) (M10 thread).
STighten the contact tip (2) with a key to ensure that good
contact is achieved.
SAssemble the clamp (7) with guide tube (6) in the M12
hole on the standard straightener (3). The guide tube (6)
should bottom on the contact tip (2).
SIf necessary, cut the guide tube (6) to length so that the
feed roller (5) runs freely.
SFor single wire < 1.6 mm (D35)
Use the straightener (3), connector (1) D35 with contact tip (2)
(M12 thread), fine--wire straightener (4) with guide tube (6)
and guide spiral, which is inserted in the guide tube (6).
SAssemble the clamp (7) with guide tube (6) in the M12
hole on the standard straightener (3). The guide tube (6)
should bottom on the contact tip (2).
SIf necessary, cut the guide tube (6) to length so that the
feed roller (5) runs freely.
SAssemble the fine--wire straightener (4) on the upper
side of the clamp for the straightener (3).
SConnect the cooling water and gas (MIG/MAG welding).
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Refilling with flux powder (Submerged arc welding)
SClose the flux valve on the flux hopper.
SRemove the cyclone on the flux recovery unit, if fitted.
SFill with flux powder. NOTE! The flux powder must be dry. Where possible avoid
using agglomerating flux powder outdoors and in damp environments.
SPosition the flux tube so that it does not become kinked.
SAdjust the height of the flux nozzle above the weld so that the correct amount of
flux is delivered.
Flux coverage should be sufficient so that penetration of the arc does not occur.
5.3Conversion of A2 SFE1 (Submerged arc welding) to MIG/MAG
welding
SAssemble in accordance with the instructions accompanying the conversion kit.
5.4Conversion of A2 SFE1 (Submerged arc welding) to Twin--arc
SAssemble in accordance with the instructions accompanying the conversion kit.
6MAINTENANCE
6.1General
NB! Before doing any kind of maintenance work, make sure the mains is
disconnected.
For the maintenance of the A2--A6 Process Controller (PEH), see the instruction
manual.
6.2Daily
SClean flux and dirt off moving parts of the welding machine.
SCheck that the contact tip and all electrical cables are connected.
SCheck that all bolted joints are tight and that guides and drive rollers are not
worn or damaged.
SCheck the brake hub braking torque. It should not be so low, that the wire reel
continues to rotate when wire feed is stopped and it should not be so great that
the feed rollers slip. As a guide, the braking torque for a 30 kg wire reel should
be 1.5 Nm.
Adjusting the braking torque:
SSet the locking button (2) to the
locked position.
SInsert a screwdriver into the hub
springs.
STurning the springs (1) clockwise
reduces the braking torque.
STurning the springs anticlockwise increases the torque.
NOTE! Turn the springs by the same amount.
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6.3Regularly
SCheck the wire feed motor brushes once every three months. Replace when
they are worn down to 6 mm.
SExamine the slides and lubricate if they bind.
SInspect the wire guides, drive rollers and contact tip on the wire feed unit.
Replace any worn or damaged components, (see spare parts list on page 179).
7FAULT TRACING
Equipment SInstruction manual for A2--A6 Process Controller.
CheckSthat the power supply is connected for the correct mains supply
Sthat all three phases are supplying the correct voltage
(phase sequence is not important)
Sthat welding cables and connections are not damaged
Sthat the controls are correctly set
Sthat the mains supply is disconnected before starting repairs
POSSIBLE FAULTS
1. Symptom Current and voltage readings show large fluctuations
Cause 1.1Contact jaws or nozzle are worn or wrong size.
ActionReplace contact jaws or nozzle.
Cause 1.2Feed roller pressure is inadequate.
ActionIncrease pressure on feed rollers.
2. SymptomWire feed is irregular
Cause 2.1Pressure on feed rollers incorrectly set.
ActionPressure on feed rollers incorrectly set.
Cause 2.2Feed rollers wrong size.
ActionReplace feed rollers.
Cause 2.3Grooves in feed rollers are worn.
ActionReplace feed rollers.
3. SymptomWelding cables o verheating
Cause 3.1Poor electrical connection.
ActionClean and tighten all electrical connections.
Cause 3.2Cross--sectional area of welding cables too small.
ActionUse cables with a larger cross--section or use parallel cables.
Spare parts are ordered through your nearest ESAB representative, see back cover.
When ordering spare parts, please state machine type and number as well as designation and spare part number as shown in the spare parts list on page 179.
This will simplify dispatch and ensure you get the right part.
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