Kemppi FastMig MF 29 User manual

Operation instructions • english
Gebrauchsanweisung • deutsch
Gebruiksaanwijzing • nederlands
Manuel d’utilisation • français
1906320E
0603
FASTMIG™
MF 29

CONTENTS
1. PREFACE ...................................................................................................................... 3
1.1. INTRODUCTION ......................................................................................................... 3
1.2. PRODUCT INTRODUCTION ...................................................................................... 3
1.2.1. OPERATION CONTROL AND CONNECTORS ............................................. 4
1.2.2. CONNECTION OF SYSTEM ......................................................................... 5
1.2.3. PARTS OF WIRE FEED MECHANISM, MF 29 ............................................. 6
1.3. OPERATION SAFETY ................................................................................................. 7
2. INSTALLATION .............................................................................................................. 8
2.1. ASSEMBLY OF MIG SYSTEM .................................................................................... 8
2.2. MOUNTING OF MIG WELDING GUN ........................................................................ 8
2.3. MOUNTING AND LOCKING OF WIRE REEL ............................................................. 8
2.4. AUTOMATIC WIRE FEED TO GUN ............................................................................ 9
2.5. ADJUSTMENT OF PRESSURE .................................................................................. 9
2.6. ADJUSTMENT OF TIGHTNESS OF REEL BRAKE .................................................... 9
2.7. BURN BACK TIME ...................................................................................................... 9
2.8. GROUND CABLE ...................................................................................................... 10
2.9. SHIELD GAS ............................................................................................................. 10
2.9.1. INSTALLING GAS BOTTLE ......................................................................... 10
2.10. MAIN SWITCH I/O ....................................................................................................11
2.11. OPERATION OF COOLING UNIT, FASTCOOL 10 ..................................................11
2.12. HANGING .................................................................................................................11
3. SERVICE, OPERATION DISTURBANCES ..................................................................11
4. DISPOSAL OF THE MACHINE ................................................................................... 12
5. ORDERING NUMBERS ............................................................................................... 12
6. TECHNICAL DATA ...................................................................................................... 13
7. TERMS OF GUARANTEE ........................................................................................... 14
2 – FASTMIG™ MF 29 / 0603 © KEMPPI OY

1. PREFACE
1.1. INTRODUCTION
Congratulations on having purchased this product. Properly installed Kemppi products should
prove to be productive machines requiring maintenance at only regular intervals. This manual is
arranged to give you a good understanding of the equipment and its safe operation. It also contains
maintenance information and technical specifications. Read this manual from front to back before
installing, operating or maintaining the equipment for the first time. For further information on
Kemppi products please contact us or your nearest Kemppi distributor.
The specifications 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 warning texts carefully and follow the instructions. Please also study the Operation safety
instructions and respect them when installing, operating and servicing the machine.
1.2. PRODUCT INTRODUCTION
FastMig™ MF is basic wire feeder designed for demanding enviroment.
This equipment’s electromagnetic compatibility (EMC) is designed for use in an
industrial environment. Class A equipment is not intended for use in residential location
where the electrical power is provided by the public low-voltage supply system.
FASTMIG™ MF 29 / 0603 – 3© KEMPPI OY

1.2.1. Operation control and connectors
MF 29
Operation panel
Connection of welding gun EURO
Lead-in of cooling
liquid hoses
Connection for control cable
Shielding gas connection
Welding current cable connector
Selection of gun
switch function
Adjustment of
wire feed speed
Adjustment of
welding voltage
4 – FASTMIG™ MF 29 / 0603 © KEMPPI OY

1.2.2. Connection of system
FASTMIG™ MF 29 / 0603 – 5© KEMPPI OY

1.2.3. Parts of wire feed mechanism, MF 29
6 – FASTMIG™ MF 29 / 0603 © KEMPPI OY
24.8.2005 12:55
1.
2. 2.

1.3. OPERATION SAFETY
Please study these Operation safety instructions and respect them when installing, operating and
servicing the machine.
Welding arc and spatters
Welding arc will hurt unprotected eyes, also be very careful with reflecting arc flash. Welding arc
and spatter will burn unprotected skin. Therefore it is highly recommended to always use safety
gloves and protective clothing.
Danger for fire or explosion
Pay attention to fire safety regulations. Remove flammable or explosive materials from welding
area. Always reserve sufficient fire-fighting equipment on welding area. Be prepared for hazards
in special welding jobs, eg. for the danger of fire or explosion when welding container type work
area. Note! Fire can break out from sparks even several hours after the welding work has been
finished!
Mains voltage
Never take welding machine inside a work area (eg. container or truck). Do not place welding
machine on a wet surface. Always check cables before operating the machine. Change defect cables
without delay. Defect cables may cause an injury or set out a fire. Connection cable must not be
compressed, it must not touch sharp edges or hot work pieces.
Welding power circuit
Isolate yourself by using proper protective clothing, do not wear wet clothing. Never work on a
wet surface or use defect cables. Do not put MIG-gun or welding cables on welding machine or
on other electric equipment. Do not press MIG-gun switch, if the gun is not directed towards a
work piece.
Welding fumes
Take care that there is sufficient ventilation during welding. Take special safety precautions when
welding metals, which contain lead, cadmium, zinc, mercury or beryllium.
FASTMIG™ MF 29 / 0603 – 7© KEMPPI OY

2. INSTALLATION
2.1. ASSEMBLY OF MIG SYSTEM
Assemble the units in order mentioned below and follow mounting and operation instructions
which are delivered in packages.
1. Installation of power source
Read paragraph: ”Installation” in operation instructions for FastMig™ power sources and carry
out the installation according to that.
2. Mounting of KM power sources to transport wagon
Read and follow the instructions given in the transport cart installation/assembly manual
3. Connecting cables
Connect the cables in accordance with the equipment notes provided.
The polarity of the welding wire (+ or -) can be changed by replacing the MF welding current cable
and return current cable with the FastMig™ power source welding cable connector.
4. Mounting of FastMig™ wire feed units to boom
Wire feed unit must be mounted to boom in such a way that its chassis is galvanic
separated both from swing arm and boom.
Suspension angle of wire feed unit can be changed by moving fixing point in handle.
2.2. MOUNTING OF MIG WELDING GUN
In order to ensure trouble-free welding check in operation instructions of gun used by you that
wire guide tube and contact tip of gun are according to manufacturer’s recommendation suitable
to be used for wire feed diameter and type in question. To tight a wire guide tube might cause for
wire feed unit a bigger stress than normally as well as disturbances in wire feed.
Screw snap connector of gun tight that there won’t come any voltage losses on connecting surface.
A loose connection will heat gun and wire feed unit and feeder.
2.3. MOUNTING AND LOCKING OF WIRE REEL
– Release the locking nut (A)!
– Mount the reel at its place. Note rotating direction of reel
– Lock the reel with locking nut..
Check that in filler wire reel there are no parts sticking out, which could e.g. chafe
against chassis or door of wire feed unit. Dragging parts might expose chassis of wire
feed unit under voltage.
8 – FASTMIG™ MF 29 / 0603 © KEMPPI OY
A
B

2.4. AUTOMATIC WIRE FEED TO GUN
Automatic wire feed makes change of wire reel more rapid. In reel change the pressure of feed
rolls need not to be released and filler wire goes automatically to correct wire line.
– Make sure that groove of feed roll matches the diameter of welding wire used.
– Release the wire end from reel and cut off the bent length. Be careful that the wire does not
spill from the reel to sides!
– Straighten about 20 cm of the wire and see that the end of it has no sharp edges (file off if
necessary). A sharp edge may damage the wire guide tube and contact tip of the welding
gun.
FastMig™ MF 29 wire feed unit:
– Draw a bit of loose wire from wire reel. Feed wire through back liner to feed rolls. Do not
release pressure of feed rolls!
– Press the gun switch and feed wire until wire goes through feed rolls to gun. See that
wire is in grooves of both feed roll pairs!
– Press still the gun switch until wire has come through contact tip.
Automatic feed may sometimes fail with thin wires (Fe, Fc, Ss: 0,6...0,8 mm, Al: 0,8...1,0 mm). In
that case you might have to open feed rolls and feed wire manually through feed rolls.
2.5. ADJUSTMENT OF PRESSURE
Adjust the pressure of feed rolls with the control screw (20) so that the wire is fed into the wire
guide tube evenly and allows a little braking when coming out from the contact tip without slipping
at the feed rolls.
Excessive pressure causes flattening of the filler wire and damage to the coating. It also
causes undue wear of the feed rolls as well as friction.
2.6. ADJUSTMENT OF TIGHTNESS OF REEL BRAKE
Adjust brake force as so big that the wire is not allowed to become too loose on the reel so that
it would spill from the reel when the rotation of the reel stops. Need for brake force is increased
with increase of wire feed speed.
Since the brake loads for its part the motor, you shouldn’t keep it unnecessarily tight.
2.7. BURN BACK TIME
Electronics of feed unit controls stopping of welding automatically so that the wire end doesn’t
melt fastened to the contact tip or the work piece. Automatics work regardless of the wire feed
speed. Can be adjusted also from power source SETUP-menu ('PoC').
Brake force is adjusted by screwing the
adjusting nut (B), tightening clockwise
direction.
FASTMIG™ MF 29 / 0603 – 9© KEMPPI OY
A
B

2.8. GROUND CABLE
Connecting of earth cable should be preferably connected directly to the welding material. Contact
surface of press always should be as large as possible.
Clean the fastening surface from paint and rust!
Use in your MIG equipment at least 70 mm². Thinner cross-sectional areas might cause overheating
of connectors and insulations.
Make sure that the welding gun in your use is designed for max. welding current needed by you!
Never use a damaged welding gun!
2.9. SHIELD GAS
Handle gas bottle with care. There is a risk for injury if gas bottle or bottle valve is
damaged!
For welding stainless steels, mixed gases are normally used. Check that the gas bottle valve is
suitable for the gas. The flow rate is set according to the welding power used in the job. A suitable
flow rate is normally 8 – 10 l/min. If the gas flow is not suitable, the welded joint will be sporous.
Contact your local Kemppi-dealer for choosing gas and equipment.
2.9.1. Installing gas bottle
Always fasten gas bottle properly in vertical position in a special holder on the wall or
on a carriage. Remember to close gas bottle valve after having finished welding.
Parts of gas flow regulator
A Gas bottle valve
B Press regulation screw
C Connecting nut
D Hose spindle
E Jacket nut
F Gas bottle pressure meter
G Gas hose pressure meter
The following installing instructions are valid for most of the gas flow regulator types:
1. Step aside and open the bottle valve (A) for a while to blow out possible impurities from
the bottle valve.
2. Turn the press regulation screw (B) of the regulator until no spring pressure can be felt.
3. Close needle valve, if there is one in the regulator.
4. Install the regulator on bottle valve and tighten connecting nut (C) with a wrench.
5. Install hose spindle (D) and jacket nut (E) into gas hose and tighten with hose clamp.
6. Connect the hose with the regulator and the other end with the wire feed unit. Tighten the
jacket nut.
7. Open bottle valve slowly. Gas bottle pressure meter (F) shows the bottle pressure.
Note! Do not use the whole contents of the bottle. The bottle should be filled when the bottle
pressure is 2 bar.
8. Open needle valve if there is one in the regulator.
9. Turn regulation screw (B) until hose pressure meter (G) shows the required flow (or pressure).
When regulating flow amount, the power source should be in switched on and the gun switch
pressed simultaneously.
Close bottle valve after having finished welding. If the machine will be out of use for a long time,
unscrew the pressure regulation screw.
10 – FASTMIG™ MF 29 / 0603 © KEMPPI OY
E
B
D
G
AF
C