Valid for serial no. 452--xxx--xxxx0443 421 001 991207
MEI 20
101103105107109111102021110025108024042106023061104022041100020040060001
Bruksanvisning
Brugsanvisning
Bruksanvisning
Käyttöohjeet
Instruction manual
Betriebsanweisung
Manuel d’instructions
Gebruiksaanwijzing
Instrucciones de uso
Istruzioni per l’uso
Manual de instruções
Ïäçãßåò ÷ñÞóåùò
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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.
Äéáôçñåßôáé ôï äéêáßùìá ôñïðïðïßçóçò ðñïäéáãñáöþí ×ùñßò ðñïåéäïðïßçóç.
SVENSKA 3..............................................
DANSK 9................................................
NORSK 15................................................
SUOMI 21................................................
ENGLISH 27..............................................
DEUTSCH 33.............................................
FRANÇAIS 39.............................................
NEDERLANDS 45.........................................
ESPAÑOL 51..............................................
ITALIANO 57..............................................
PORTUGUÊS 63..........................................
ÅËËÇÍÉÊÁ 69.............................................
ENGLISH
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TOCe
1 DIRECTIVE 28........................................................
2SAFETY 28...........................................................
3 INTRODUCTION 29...................................................
3.1 General 29..................................................................
3.2 Technical data 30............................................................
4 INSTALLATION 31....................................................
4.1 General 31..................................................................
4.2 Connecting the wire conduit 31.................................................
4.3 Replacement / Insertion of filler wire 31..........................................
5 MAINTENANCE 32....................................................
5.1 General 32..................................................................
5.2 Inspection and cleaning 32....................................................
6 ORDERING OF SPARE PARTS 32......................................
DIAGRAM 76............................................................
SPARE PARTS LIST 77...................................................
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1 DIRECTIVE
DECLARATION OF CONFORMITY
Esab Welding Equipment AB, S--695 81 Laxå, Sweden, declares that Wire feed unit
MEI 20 from serial number 452 onwards, conforms to standard EN 60974--1, in ac-
cordance with the requirements of directive (73/23/EEC) and appendix (93/68/EEC)
and standard EN 50199 in accordance with the requirements of directive
(89/336/EEC) and appendix (93/68/EEC).
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Paul Karlsson
Managing Director
Esab Welding Equipment AB
695 81 LAXÅ
SWEDEN Tel: + 46 584 81000 Fax: + 46 584
12336
Laxå 1994--12--01
2SAFETY
Users of ESAB welding equipment have the ultimate responsibility for ensuring that anyone who
works on or near the equipment observes all the relevant safety precautions.
Safety precautions must meet the requirements that apply to this type of welding equipment.
The following recommendations should be observed in addition to the standard regulations that apply
to the work place.
All work must be carried out by trained personnel well familiar with the operation of the welding equip-
ment.
Incorrect operation of the equipment may lead to hazardous situations which can result in injury to the
operator and damage to the equipment.
1. Anyone who uses the welding equipment must be familiar with:
S its operation
S location of emergency stops
S its function
S relevant safety precautions
S welding
2. The operator must ensure that:
S no unauthorized person is stationed within the working area of the equipment when it is
started up.
S that no--one is unprotected when the arc is struck
3. The work place must:
S be suitable for the purpose
S be free from draughts
4. Personal safety equipment
S Always wear recommended personal safety equipment, such as safety glasses, flame--proof
clothing, safety gloves.
S Do not wear loose--fitting items, such as scarves, bracelets, rings, etc., which could become
trapped or cause burns.
5. General precautions
S Make sure the return cable is connected securely.
S Work on high voltage equipment shall only be carried out by a qualified electrician.
S Appropriate fire extinquishing equipment must be clearly marked and close at hand.
S Lubrication and maintenance must not be carried out on the equipment during operation.
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WARNING
READ AND UNDERSTAND THE INSTRUCTION MANUAL BEFORE INSTALLING OR OPERATING.
ARC WELDING AND CUTTING CAN BE INJURIOUS TO YOURSELF AND OTHERS. TAKE PRECAU-
TIONS WHEN WELDING. ASK FOR YOUR EMPLOYER’S SAFETY PRACTICES WHICH SHOULD BE
BASED ON MANUFACTURERS’ HAZARD DATA.
ELECTRIC SHOCK -- Can kill
S Install and earth the welding unit in accordance with applicable standards.
S Do not touch live electrical parts or electrodes with bare skin, wet gloves or wet clothing.
S Insulate yourself from earth and the workpiece.
S Ensure your working stance is safe.
FUMES AND GASES -- Can b e dangerous to health
S Keep your head out of the fumes.
S Use 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.
S Protect your eyes and body. Use the correct welding screen and filter lens and wear protective
clothing.
S Protect bystanders with suitable screens or curtains.
FIRE HAZARD
S Sparks (spatter) can cause fire. Make sure therefore that there are no inflammable materials nearby.
NOISE -- Excessive noise can damage hearing
S Protect your ears. Use ear defenders or other hearing protection.
S Warn bystanders of the risk.
MALFUNCTION -- Call for expert assistance in the event of malfunction.
PROTECT YOURSELF AND OTHERS!
WARNING
This product is intended for industrial use. In a domestic environment this
product may cause radio interference. It is the user’s responsibility to take
adequate precautions.
3 INTRODUCTION
3.1 General
The MEI 20 is a wire feed unit for
mechanized TIG welding. It is
designed for u se with the
MECHTIG 315 and PROTIG 315.
The unit consists of the
following components:
1. Tube frame
2. Feed unit
3. Drive motor
4. Reel holder
5. Cable
6. Wire conduit
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The tube frame (1) is fitted with a handle, which is positioned so that the wire feed
unit balances when lifted.
The MEI 20 is designed for wire diameters Æ 0.6 to Æ 0.8 mm.
The reel holder (4) will accept reels with an outer diameter of 200 mm and a width of
60 mm. T he cover, which is removed to check or change the wire, is held by snap
fasteners.
A DC motor (3) with gearwheel drives the two feed rollers through a cog.
The motor is equipped with a tachometer generator which is connected to the power
supply for accurate control of feed speed. The feed rollers have two grooves for wire
and each groove is intended for a given wire size.
Two pressure rollers, which provide the necessary friction between the wire and the
feed roller, are mounted in a spring mechanism that allows the pressure to be
adjusted.
A cable (5) is provided for connecting the MEI 20 to the power source.
The MEI 20 has no controls of its own. It is controlled by means of the MECHTIG
315 or PROTIG 315 power source.
3.2 Technical data
MEI 20
Length of wire conduit 4.2 m
Wire feed speed 0.1 -- 2.6 m/min
Dimensions L x W x H 460 x 310 x 310 mm
Weight with reel 9.0 kg
Weight without reel 4.0 kg
Continuous A--weighted noise pressure 58 dB
Motor
Rated voltage 48 V DC
Gear ratio 159:1
Speed 70 -- 5500 r/min
Max power 50 W
Wire reel
Outer diameter 200 mm
Reelwidth 60 mm
Width of hub 60 mm
Hub hole diameter 51.5 mm
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4 INSTALLATION
4.1 General
The installation sh all be executed b y a professional.
WARNING!
Rotating parts can cause injury, take great care.
4.2 Connecting the wire conduit
S Unscrew the bolt on the output side of the wire feed unit.
S Connect the wire conduit and tighten the bolt.
S Make sure the wire conduit is fitted correctly and that the end bottoms in the
socket.
S Undo the quick connector on the wire feed hose.
S Screw the holder onto the welding tool.
S Push the teflon liner into the tapered hole in the holder. Screw the liner in place.
S Screw the wire helix onto the holder on the tool. Screw the contact tip onto the
wire helix. Screw the contact tip holder onto the tool but do not fit the contact tip
into the holder yet.
S Open the feed rollers and pull the wire through far enough so that it will re ach the
full length of the wire feed hose to the tool.
S Straighten the end of the wire and file the end round.
S Insert the wire through the quick connector and push it through the teflon liner,
wire helix and contact tip holder.
S Refit the quick connector.
S Fit the contact tip in the holder.
4.3 Replacement / Insertion of filler wire
S Release the feed roller pressure spring.
S Rewind any existing wire out of the wire feed unit and remove the wire reel.
S Straighten the first 10--20 cm of the wire. File off any burrs or sharp edges on the
wire before feeding it through the wire feed unit. Make sure the wire passes
correctly through the grooves in the wire feed roller and through the contact tip /
wire conduit.
S Retension the spring.
S Press the reel cover in place.
S Start wire feed using the switch on the control unit / power source.
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5 MAINTENANCE
5.1 General
Note:
All warranty undertakings given by the supplier cease to apply if the customer
attempts to rectify any faults on the machine during the warranty period.
5.2 Inspection and cleaning
Regular maintenance is important for reliable and safe operation.
S Cleaning and replacement of the wear parts of the wire feed mechanism should
take place periodically to ensure trouble--free wire feed.
S Note that an excessive pressure setting can result in abnormal wear on the
pressure roller, feed roller and wire liner.
6 ORDERING OF SPARE PARTS
MEI 20 is designed and tested in accordance with the EN 60974-- 1 (IEC
974--1) international standard.
It is the obligation of the service unit which has carried out the service or re-
pair work to make sure that the product still conforms to the said standard.
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 desig-
nation and spare part number as shown in the spare parts list on page 77.
This will simplify dispatch and ensure you get the r ight part.
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