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.
ESAB Welding Equipment AB, S--695 81 Laxå, Sweden, declares that Wire feed unit MEK 20C from
serial number 710 onwards, conforms to standard EN 60974--5, 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 directive (89/336/EEC) and appendix (93/68/EEC).
Paul Karlsson
Managing Director
ESAB Welding Equipment AB
695 81 LAXÅ
SWEDENTel: + 46 584 81000Fax: + 46 584 12336
2SAFETY
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 take fumes and gases away 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 earmuffs 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
MEK 20C is a portable wire feed unit with four--roller drive, designed for MIG/MAG
welding in conjunction with Esab’s A10 wire feed system. The wir e feed unit can
accommodate a 200 mm diameter wire reel.
The wire feed unit is mounted on an insulated protective frame equipped with
runners.
The wire feed unit is controlled from the PUA1 controller, see additional information
under Operation.
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Details of ESAB’s accessories for the wire feed units can be found on page
86.
4TECHNICAL SPECIFICATION
Dimensions lxwxh500x195x300
Weight14 kg
Wire feed speed2--25 m/min
Voltag e42V 50--60Hz
Power consumption300 VA
Torch connectionEURO
5INSTALLATION
The in stallatio n must be executed by a p rofessional.
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.
5.1Termination resistance
The termination resistance must be connected to the ends of the CAN bus to prevent
communication problems. The controller has a built--in terminator, but the power
source and wire feed unit do not.
The terminator should be fitted as follows depending on how the units are
connected:
1.Controller connected to wire feed unit.
The termination resistance must be connected to the rear of the power source.
(Already connected this way on delivery).
2.Controller connected to power source.
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The termination resistance
must be connected to the front
of the wire feed unit.
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6OPERATION
General safety regulations for the handling of the equipment can be found on
page 28. Read through before you start using the equipment!
WARNING!
Rotating parts can cause injury, take great care.
WARNING!
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.
Setting the wire feed pressure
Start by making sure that the wire moves smoothly through the wire guide. Then
set the pressure of the wire feeder’s pressure rollers. It is important that the
pressure is not too great.
Fig 1Fig 2
To check that the feed pressure is set correctly, you can feed out the wire against
an insolated object, e.g. a piece of wood.
When you hold the pistol approx. 5 mm from the piece of wood (fig. 1) the feed
rollers should slip.
If you hold the pistol approx. 50 mm from the piece of wood, the wire should be
fed out and bend (fig. 2).
The wire feed speed and voltag e
The wire feed speed and voltage can be adjusted using the PUA1 controller in set and
measure modes. If you want to use the potentiometers on the front of the wire feed unit
then the toggle switch inside the wire feed unit must be in the upper position and the
PUA1 controller should be set for remote operation.
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Remote control
To use a remote control, the toggle switch inside the wire feed unit must be switched
to remote, and the PUA1 controller must also be set to remote, as above. If you want
to change the wire feed and voltage parameters using the controller, you must switch
from “remote“ to measure mode or set mode.
6.1Connection
1Nipple, cooling water (only certain models) 6Connector, remote control
2Nipple, cooling water (only certain models) 7Adapter, welding torch
3Nipple, gas connection8Potentiometer, wire feed speed
4Connector, control cable9Potentiometer, welding voltage
5Adapter, welding current10Connector setting control PUA1
1
2
9
8
10
6
1
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2
3
4
5
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7MAINTENANCE
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.
7.1Inspection and cleaning
Regularly maintenance is important for reliable and safe operations.
SCleaning and replacement of the wire feed mechanism’s wear parts should take
place periodically to ensure trouble free wire feed.
SNote that an excessive pressure setting can result in abnormal wear on the
pressure roller, feed roller and wire liner
The brake hub
The hub is adjusted when delivered, if
readjustment is required, follow the instructions
below. Adjust the brake hub so that wire is slightly
slack when wire feed stops.
SAdjusting the braking torque:
STurn the red handle to the locked position.
SInsert a screwdriver into the springs in the hub.
Turn the springs clockwise to r educe the braking torque
Turn the springs anticlockwise to increase the braking torque. NB: Turn both
springs through the same amount.
8ORDERING OF SPARE PARTS
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.
This will simplify dispatch and ensure you get the right part.
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