ESAB MEH 30, MEH 44 Basic are wire feed units designed for MIG/MAG welding, offering precise wire feeding and control. These units feature electronic motor control, enabling consistent and accurate wire feed. The MEH 44 variant accommodates larger wire reels up to 44 cm in diameter, making it suitable for heavier-duty applications. Both models provide flexible operation with 2/4 step trigger action and normal/inch start options. The MEH 44 also includes a reverse feed function for easier wire removal.
ESAB MEH 30, MEH 44 Basic are wire feed units designed for MIG/MAG welding, offering precise wire feeding and control. These units feature electronic motor control, enabling consistent and accurate wire feed. The MEH 44 variant accommodates larger wire reels up to 44 cm in diameter, making it suitable for heavier-duty applications. Both models provide flexible operation with 2/4 step trigger action and normal/inch start options. The MEH 44 also includes a reverse feed function for easier wire removal.
Valid for serial no. 025, 127, 345, 502, 519, 6260469 803 002 020704
MEH 30 Basic
MEH 44 Basic
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 11................................................
NORSK 19................................................
SUOMI 27................................................
ENGLISH 35..............................................
DEUTSCH 43.............................................
FRANÇAIS 52.............................................
NEDERLANDS 60.........................................
ESPAÑOL 69..............................................
ITALIANO 78..............................................
PORTUGUÊS 86..........................................
ÅËËÇÍÉÊÁ 95.............................................
ENGLISH
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TOCe
1 DIRECTIVE 36........................................................
2SAFETY 36...........................................................
3 INTRODUCTION 37...................................................
4 TECHNICAL DESCRIPTION 37.........................................
5 INSTALLATION 39....................................................
6 OPERATION 40.......................................................
7 MAINTENANCE 42....................................................
8 ORDERING OF SPARE PARTS 42......................................
DIAGRAM 105............................................................
SPARE PARTS LIST 107...................................................
ACCESSORIES 116.......................................................
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1 DIRECTIVE
DECLARATION OF CONFORMITY
Esab Welding Equipment AB, S--695 81 Laxå, Sweden, declares that Wire feed unit
MEH 30/44 from serial number 626 onwards, conforms to standard EN 60974--1, in
accordance with the requirements of directive (73/23/EEC) and appendix
(93/68/EEC) and standard EN 50199 in accordance with the requirements of direc -
tive (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 1996--04--20
2SAFETY
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 be dangerous to health
S Keep your head out of the fumes.
S Use ventilation, extraction at the arc, or both, to take fumes and gases away from your breathing zone
and the general area.
ARC RAYS -- Can injure eyes and burn skin.
S Protect your eyes and body. Use the c orrect 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 earmuffs or other hearing protection.
S Warn bystanders of the risk.
MALFUNCTION -- Call for expert assistance in the event of malfunction.
PROTECT YOURSELF AND OTHERS!
GB
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3 INTRODUCTION
The A10 -- MEH 30 and A10 -- MEH 44 are two feed units for MIG/MAG welding
using ESAB’s A10 wire advance system.
Both wire feed units are constructed in the same way and have the same
dimensions, excluding length.
The MEH 44 has been made larger to accomodate a larger wire feed mechanism
and a wire reel with an outer of 44 cm. The MEH 30 will accept wire reels up to 30
cm in diameter. Hence the designation 30 and 44. T he motors are controlled
electronically and are identical on both units, carrying the designation E. The letter M
stands for wire feed unit and H indicates the generation.
The MEH 30 has switches for 2/4 step trigger action and for normal/inch start. T he
MEH 44 also has a switch for reversing the feed motor to make it easier to remove
thicker wires from the welding hose. These controls are located on the dividing panel
behind the lid. The socket for connection of a remote control device is on the front
panel and the r emote control comes into action as soon as it is connected to the wire
feed unit.
For a wire feed unit to be complete it must be equipped either with a turnable,
counterbalance device or a carriage. A turnable or counterbalance device a llow the
wire feed unit to be mounted on a pivot on the power source. A carriage allows the
wire feed unit to be moved easily over the floor or work table.
A wire feed unit and turnable or carriage can also be fitted with a support device and
suspended over the work place.
ESAB’s accessories for the product can be found on page 116.
4 TECHNICAL DESCRIPTION
MEH 30 MEH 44
Length x Breadth x Height,mm 337x326x268 457x326x268
Weight,kg, 13.6 19
Casing
The wire feed unit has a casing of stove enamelled sheet and is divided vertically
into two sections. The first section, covered by a screwed lid, contains the circuit and
solenoid valve.
The second section is open at the r ear and the top and sides are covered by a lid.
The lid is hinged at the top and held by a manually operated catch at the bottom. this
section contains the wire feed mechanism, drive assembly and connection terminals
for the welding hose. Mounted on the dividing panel behind the feed mechanism are
switches for 2/4 step trigger action and for normal/inch start.
The MEH 44 also contains a switch for reversing the wire feed. The potentiometer
for setting the burn--back time can be reached through a hole in the dividing panel.
The wire is shielded from dust and contact by a polyester strip fastened to the rear
edge of the lid. In the baseplate is a grommet through which the welding cable
passes from the power source.
GB
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Wire feed mechanism MEH 30
The wire feed mechanism is driven by a permanent magnet electric motor. The
motor is united to a worm gearbox with a feed roller on the output shaft. The gears
on the feed shaft drive a thrust roller. The wire is advanced by the rollers and power
is received from two driving rollers. Pressure is applied to the wire by a blade
attached to the bracket supporting the thrust r oller.
The blade spring is lever--shaped and allows the thrust roller to be moved out of the
way when changing the wire or cleaning the outlet nozzle. When the thrust roller is
released the same pressure is applied to the wire as before.This pressure can be
adjusted using the knob.
The connection plate on the wire feed unit is used for connecting welding current,
control current, shielding gas, and the wire, all in a single coupling. The wire outlet
nozzle is attached to the connection plate by a locking pin. No tools a re needed to
replace the nozzle. On the connection plate is a power relay which closes when
current flows in the welding circuit.
The feed roller and thrust roller have three grooves for different wire dimensions.
The rollers need not be changed when changing to thicker or thinner wire, just
moved sideways. The positions of the feed roller on the shaft is adjusted using one
or two shims. The thrust roller automatically adjust to the current position in relation
to the feed roller. T he feed mechanism is insulated from the casing.
MEH 44
The feed mechanism in the MEH 44 is largely constructed of the same components
as the MEH 30. T he connection plate, thrust roller and blade spring with adjusting
screw are all identical.
The main difference between the two feed mechanisms is that the MEH 44 has four
driving rollers. Two motors connected in series each drive one feed roller and one
thrust roller.Drive force is divided equally between the two pairs of roller. Any slip due
to differences in the diameters of the rollers is evended out in the motors.
The thrust r ollers are housed in a bogie mounted on a shaft. This is arranged so that
the thrust applied on each pair of rollers is the same. The bogie can easily be
removed once the blade spring is moved to the side. No tools are needed. Between
the two pairs of rollers is an intermediate nozzle that guides the wire. The wire feed
mechanism is insulated from the casing.
Regular equipment
The electronic components are on a circuit card mounted on the dividing panel.
Internal cables are connected to the card by multipin connectors. The control cable
is connected to a bolted terminal.
Turnable
The turnable is attached at the rear of the wire feed unit. It is delivered with an
insulated pivot which can be fitted in a hole on the top of the power source, allowing
the wire feed unit to be swung around as far as the gas bottle.
On top of the turnable is the brake hub for the wire reel. The brake hub can be fitted
in either of two holes for 30 or 44 cm reels.
GB
R
S
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bm10d12e
Carriage
The carriage has a pair of rubber wheels on a reinforced axle and is fitted to the rear
of the wire feed unit to allow it to be m oved easily. Two castors are included for fitting
under the front panel. The brake hub is mounted on a bracket on the top of the
carriage.
Suspension device
The suspension device is intended to allow the wire feed unit to be hung above the
work place. The device has a large oval hole for a lifting hook or the like and is
bolted to the turnable or carriage along with the brake hub.
Counterbalance device
The purpose of the counterbalance device is to support the welding hose and make
the welder’s job easier. The device is combined with a mast which holds the welding
hose. The mast can be pulled down into a horizontal position or lifted up into a
vertical position by the counterbalance device.
The counterbalance device has a rear section, an arm and a spring assembly. The
rear section is bolted to the casing of the wire feed unit and forms the attachment
point for the spring. T he arm is pivoted on the rear section and has a tube which fits
over the insulated pivot on the power source. The spring, a stiff flat spiral spring, is
attached at its centre to the arm by an adjusting screw.
The brake hub is positioned at the centre of rotion between the rear section and the
arm. This means that the lifting force remains the same whether the reel is full or
empty. The lifting torque can be adjusted by tightening or loosening the adjusting
screw with an allen key. In this way the counterbalance force can be adjusted for
various welding guns. The counterbalance device comes in two versions, one for the
MEH 30 and another for the MEH 44.
Mast
The mast consist of two pressed channels which are joined during assembly and
bolted below the wire feed unit using a clamp. T he spring assembly is fitted to the
top end of the mast and provides a smooth transition for the welding hose as it
leaves the mast. The welding hose is held in place by securing straps.
Since the mast is mounted on the wire feed unit the welding hose has a straight run
from the wire feed unit. This contributes to uniform wire feeding and reduced wear.
5 INSTALLATION
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.
NOTE!
Connection instruction MEH 44B
When the feed device is connected to equipment
with instruments that show the wire feed speed,
the blue cable R must be connected to B4 and
the red cable S to B5 on the printed circuit board.
GB
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bm10d12e
6 OPERATION
General safety regulations for the handling of the equipment can be found on
page 36. Read through before you start using the equipment!
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.
WARNING!
WARNING!
Rotating parts can cause injury, take great care.
There is a risk of tipping if the wire feed unit is fitted with a counterbalance arm. Secure the
equipment, especially if used on an uneven or sloping surface.
Limit the angle of rotation of the wire feed unit using the straps supplied.
When moving the equipment, do NOT pull on the gun.
WARNING!
Connections
Voltage 42 V, 50--60 Hz
Input power 60 W during continuos welding
51 W during intermittent welding
Welding current Welding cable terminal connected to
terminal plate using M10 bolt.
Control connections Cable type LiYY 8x1.5 mm2 with a
23 pin plug connected to circuit card at a
screwed terminal, length 2 m.
Remote control On the front is a 12 pin socket for
connection to a remote control device.
As soon as a r emote control device is
connected it takes over control.
Gas connections Hose nipple, diameter 6 mm.
Welding gun Combined coupling for welding current,
control voltage, shielding gas and electrode.
Drive unit
Permanent magnet DC motor combined with worm gearbox.
Voltage MEH 30, 24 V, MEH 44, 12 V
Output r/min 94 r/m at 150 Ncm load.
Max permissible torque 450 Ncm
Shielding gas valve
2 way, direct action solenoid valve.
Operation Closed if no current to coil
Thread R 1/8”
GB
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bm10d12e
Electrical connection Spade connector
Gas pressure Max 1 MPa (10 kp/cm
2
)
Brake h u b
Designed for the following sizes of wire reel:
Outer diameter ⊘ 300 mm
Hub hole ⊘ 51.5 m m
Hub length 100 mm
Wires MEH30 ø mm MEH44 ø mm
Steel 0,6--1,6 0,8--2,4
Aluminium Grade 18 13 or harder 1,0--1,6 Grade 18 13 or harder 1,0--2,4
Stainless 0,6--1,2 0,8--1,6
Cored wires 0,9--1,6 0,9--2,4
Feed rollers
Four versions of cogged roller are available.
1 for steel, aluminium and stainless 0.6--1.2
2 for steel, aluminium and stainless 1.6--2.4
3 cored wire 1.2--2.0
4 cored wire 2.4
NOTE! A heavy duty (HD) version of r oller is available with a bearing for very heavy
applications.
Nozzles
Nozzles are available for the following wire dimensions.
Inlet nozzles
1 ⊘ 2.0 mm plastic for ⊘ 0,6--1,2 mm wire
2 ⊘ 4.0 mm plastic for ⊘ 1,6--2,4 mm wire
3 ⊘ 2.4 m m steel for ⊘ 1,2--2,0 mm cored wire
4 ⊘ 4.0 m m steel for ⊘ 2,4 mm cored wire (MEH 44)
Intermediate nozzles
1 ⊘ 1.6 mm plastic for ⊘ 0,8--1,2 mm wire
2 ⊘ 4.0 mm plastic for ⊘ 1,6--2,4 mm wire
3 ⊘ 2.4 m m copper for ⊘ 1,2--2,0 mm cored wire
4 ⊘ 4.0 m m copper for ⊘ 2,4 mm cored wire
Outlet nozzles
1 ⊘ 2,0 m m for ⊘ 0,.6--1,6 m m wire
2 ⊘ 3,5 m m for ⊘ 2,0--2,4 mm wire
For combinations of wires, feed rollers and nozzles, see tabel.
Wire feed speed
1.5--25 m /min, fully adjustable.
Accuracy of regulation
Less than 4% deviation from set value at a torque increase of 100--150 Ncm (MEH
30) and 100--200 Ncm (MEH 44).
GB
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bm10d12e
7 MAINTENANCE
Regular maintenance is important for safe, reliable operation.
Note!
All guarantee undertakings from the supplier cease to apply if the customer himself
attempts any work in the product during the guarantee period in order to rectify any
faults.
S Cleaning and replacement of the wire feed mechanism’s wear parts should take
place periodically to ensure trouble free wire feed.
S Note that an excessive pressure setting can result in abnormal wear on the pres-
sure roller, feed roller and wire liner.
8 ORDERING OF SPARE PARTS
Spare parts may be ordered through your nearest ESAB dealer, see the last page of
this publication. When ordering, please state product type, serial number, designa-
tion and spare part number in accordance with the spare parts list.
This facilitates d ispatch and ens ures correct delivery.
GB
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ESAB MEH 30, MEH 44 Basic are wire feed units designed for MIG/MAG welding, offering precise wire feeding and control. These units feature electronic motor control, enabling consistent and accurate wire feed. The MEH 44 variant accommodates larger wire reels up to 44 cm in diameter, making it suitable for heavier-duty applications. Both models provide flexible operation with 2/4 step trigger action and normal/inch start options. The MEH 44 also includes a reverse feed function for easier wire removal.
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