Minarc_150AU_om_EN.pdf

Operation instructions • english

1910150AU

MINARC 150 AU

CONTENTS

1. PREFACE ..............................................................................................................3

1.1. Introduction ...................................................................................................3

1.2. Productintroduction ......................................................................................3

1.3. Operationsafety............................................................................................3

2. BEFORE YOU START USING THE UNIT.............................................................4

2.1. Unpacking .....................................................................................................4

2.2. Placing the unit .............................................................................................4

2.3. Serialnumber................................................................................................4

2.4. Maincomponents..........................................................................................4

2.5. Connecting to power supply mains ...............................................................5

2.6. Filler materials and equipment......................................................................5

3. USE ......................................................................................................................5

3.1. Weldingprocesses........................................................................................5

3.1.1. Manual Metal Arc welding (MMA)............................................................5

3.1.2. TIG welding .............................................................................................6

3.2. Operatingfunctions.......................................................................................6

3.3. Weldingselections ........................................................................................6

3.3.1. Manual Metal Arc welding (MMA)............................................................6

3.3.2. DC TIG welding .......................................................................................7

3.4. Welding .........................................................................................................7

3.4.1.Earthing ...................................................................................................7

3.4.2.Welding....................................................................................................7

3.5. Storing...........................................................................................................7

4. MAINTENANCE.....................................................................................................7

4.1. Dailymaintenance ........................................................................................8

4.2. Troubleshooting ............................................................................................8

5. ORDERING NUMBERS.........................................................................................8

6. TECHNICAL DATA ................................................................................................9

2 – Minarc 150AU / 0411

1. PREFACE

1.1. INTRODUCTION

Congratulations on having purchased a KEMPPI product. Properly installed and used

KEMPPI products should prove to be productive machines requiring only a small amount

of regular maintenance.

This manual is arranged to give you a good understanding of the equipment and its safe

use. There is also information on both servicing the unit as well as its technical data.

Read the instructions before taking the machine into use or servicing it for the ﬁ rst time.

Additional information on Kemppi products and their use can be obtained from Kemppi

or a Kemppi dealer.

The speciﬁ cations and designs presented in this manual are subject to change without prior

notice.

In this document, for danger to life or injury the following symbol is used:

Read the warnings carefully and follow the instructions. Please also study the operation safety

instructions and respect them when installing, operating and servicing the machine.

1.2. PRODUCTINTRODUCTION

Kemppi Minarc 150AU is a Manual Metal Arc welding machine, small in size, suitable

for industry, site and repair welding. The unit uses one phase connection voltage.

Minarc 150AU is equipped with so called Voltage Reduction Device (VRD) function to

avoid danger of electric shock. VRD maintains open circuit voltage under 35 V.

Minarc tolerates a great ﬂ uctuation of input voltage and is thus suitable for work on sites

using generator as well as to be used with long power cables. Inverter technology has

been used when designing the unit. Power regulation in power source is done with IGBT

transistors. Welding and earth cables are supplied with the unit. They are equipped with

suitable electrode holder, earth clamps and connections for the unit.

Minarc can also be used for TIG welding. TIG arc is started by scratching. Ordering

numbers of additional equipment for TIG welding can be found under 5. Ordering

numbers.

1.3. OPERATIONSAFETY

Read the warning texts carefully and follow the instructions.

Arc and welding spatter

Arc and the reﬂ ected radiation from it can damage unprotected eyes. Shield your eyes and

protect your surroundings appropriately before you start welding. Arc and welding spatter

will burn unprotected skin. When welding, use protective gloves and clothing.

Danger of ﬁ re and explosion

Observe the ﬁ re safety instructions. Remove ﬂ ammable material around the place where

you will weld. Have necessary ﬁ re extinguishing equipment at hand when you weld. Note

dangers caused by special jobs, such as risk of ﬁ re and explosion when welding tanks.

Note! Sparks may ignite ﬁ re even hours later!

Welding is working with ﬁ re, note special instructions for such work.

Minarc 150AU / 0411 – 3

Mains voltage

Never take welding machine inside the work piece (e.g. container or car). Never set the

welding machine on wet surface. Replace faulty cables immediately, they create a danger

to life and can cause a ﬁ re. See that the connecting cable does not stick nor touch sharp

edges or a hot welding piece.

Welding current circuit

Isolate yourself from the welding current circuit by wearing dry and undamaged protective

clothing. Never work on a wet surface. Never use damaged welding cables. Never set

neither electrode holder, earth clamp nor the welding cables on top of the power source

or other electric equipment.

Welding fumes

Ensure adequate ventilation. Always take special measures when welding metals containing

lead, cadmium, zinc, mercury or beryllium.

2. BEFORE YOU START USING THE UNIT

2.1. UNPACKING

The unit is packed in durable packages, designed specially for it. Nevertheless, always

before using the unit, make sure it was not damaged during transportation. Also check

that you have received what you ordered and that there are instructions for it. NOTE! The

packaging material of the products is suitable for recycling.

2.2. PLACING THE UNIT

Place the unit on horizontal, solid and clean surface. Shield it from heavy rain and scorching

sun. Make sure that cooling air circulates freely.

2.3. SERIALNUMBER

Serial number of the unit is marked on the rating plate of the unit. The serial number makes

it possible to trace product manufacturing series. You might need the serial number when

placing spare parts orders or when planning maintenance.

2.4. MAINCOMPONENTS

Connect welding cable and earth cable to their connections on the power source. Mains

cable and wall plug are already installed.

4 – Minarc 150AU / 0411

Parts of the unit

Main power switch and signal light

Selector switch for welding process

Welding current regulator

Signal light VRD safe ON

Signal light for overheating

Electrode holder and welding cable

Earth cable and clamp

2.5. CONNECTING TO POWER SUPPLY MAINS

The unit has a mains cable and a wall plug. You can ﬁ nd fuse and cable sizes in the end

of these instructions in Technical data.

2.6. FILLER MATERIALS AND EQUIPMENT

See also 2.4. Main components. You can use all electrodes intended for welding with DC.

Suitable electrode sizes for the unit are listed in the table on unit’s front panel as well as

in the end of these instructions in Technical data.

Use welding speciﬁ cations given on electrode package.

Check that you have selected the correct welding process before starting to

weld.

Check that welding cable and earth cable connections are tight. If a

connection is slack, it will result in voltage drop that will cause the

connection to heat.

Mount the electrode ﬁ rmly in holder.

3. USE

It is forbidden to weld in places where there is a danger of ﬁ re or explosion!

3.1. WELDINGPROCESSES

3.1.1. Manual Metal Arc welding (MMA)

In manual metal arc (MMA) the welding ﬁ ller material is melted from the electrode to the

weld pool. Filler and rate of welding current is selected on the basis of electrode size used

and welding position. Arc is formed between electrode tip and work piece. The melting

electrode coating forms gas and slag, which protects the weld pool. Slag solidiﬁ ed over

the weld is removed after welding e.g. with a chipping hammer.

Minarc 150AU / 0411 – 5

Body of machine

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