KOP & WDHOM LBT150 User manual

1
Operation Manual
MIG Welding SPOOL GUN LBT150

2
Version
Due to product version upgrades or other reasons, the contents of this document are not regularly
updated. Unless otherwise agreed, this document is intended as a guide only and all statements,
information and recommendations in this document do not constitute any guarantee, expressed or
implied.
The pictures in this document are for reference only. If the picture is different from the real one, then use
the pictures for guidance only.
Contents
Contents ................................................................................................................................2
1 Brief product introduction ...................................................................................................3
1.1 Summarize ................................................................................................................3
1.2 Technical parameters ............................................................................................... 3
2 Circuit diagram ...................................................................................................................3
3 Installation instructions ...................................................................................................... 4
4 Spool Gun torch welding ................................................................................................... 4
4.1 Polarity Conversion Joint ......................................................................................... 4
4.2 Mig torch switch ........................................................................................................5
4.3 How to welding aluminum: ....................................................................................... 5
5 Daily maintenance and checking .......................................................................................7
5.1 Daily maintenance .................................................................................................... 7
5.2 Welding problems and solutions .............................................................................. 7
6 Attention ............................................................................................................................. 8
6.1 Welding environment and safety ..............................................................................8
6.2 Symbol definition: ..................................................................................................... 8
7 Service GUARANTEE ..................................................................................................... 13

3
1 Brief product introduction
1.1 Summarize
The main characteristics of mig welding spool gun are uniform and stable wire feeding
speed and large range of movement, which can realize the welding area of 10m or even
farther. Using the mig welding spool gun with our gas shielded welding machine,
engineers can realize long-distance welding without dragging heavy machines and power
extension cables. Since the wire feeding mechanism and welding wire are installed on the
mig welding spool gun, the welding process will be more efficient and stable. This mig
welding spool gun has very good welding effect when welding aluminum.
1.2 Technical parameters
Machine type LBT150
Length(m) 4
Interface type European connector, 4-core aviation plug
Cooling mode GAS COOLED
Duty cycle (%) 60%@150A CO2
60%@150A Ar
60%@130A MIXED GAS
Wire diameter (mm) AL 0.8-1.2
STEEL 0.8-1.0
2 Circuit diagram
Please make sure your welding machine supports the mig spool gun.
Reminder:If the spool gun runs backwards,let the No. 3 and No. 4 plug-in wires on the
machine socket can be exchanged.

4
3 Installation instructions
1Open the cover of the wire feeding disc, open the cover of the wire feeding wheel bin, and
loosen the pressure wheel of the wire feeding mechanism.
2Send the welding wire to the wire feeding wheel (note that the wire feeding wheel matches the
diameter of the welding wire)
3Install the welding wire on the shaft beside the wire feeding, and tighten the mounting screws.
4Press the wire feeding wheel and pressing wheel well, cover the cover of wire feeding bin and
the cover of wire feeding tray
4 Spool Gun torch welding
The use of spool gun is similar to that of MIG gun, except that the wire is fed through the
wire feeding mechanism of the spool gun itself. In the spool gun mode, the feeding
mechanism of the original machine does not work.
Select spool gun mode on the front control panel or turn on the “Spool gun” switch at MIG
mode. (This toggle switch is in the wire feeding compartment of the machine or near the
“Mode” button). Aluminum welding is supported in spool gun mode.
4.1 Polarity Conversion Joint
This machine has the polarity conversion; There are positive and negative connector on the front panel.
When using solid wire with gas sheilding, the polarity selection cable should be connected to the
positive connector, the working clamp cable should be connected to the negative connector; When using
flux-cored wire the polarity selection cable should be connected to the negative connector and the
working clamp cable should be connected to positive connector.

5
Direct Current Electrode Positive (DCEP):The
electrode cable (MMA stinger, MIG gun) connected
to the positive (+) connector on the front panel, The
workpiece is connected to negative (-) connector
by the work clamp cable. Suitable for positive wire
or stick electrode.
Direct Current Electrode Negative (DCEN):The
workpiece is connected to the positive (+)
connector on the front panel. The welding
electrode cable (MMA stinger, MIG gun, TIG Gun)
is connected to the negative (-) connector pole.
Suitable for negative wire stick electrode.
Solid Wire,Welding aluminum Flux Cored Wire
4.2 Mig torch switch
When using MIG spool gun, it must be ensured that the machine works in MIG mode and
the mig torch switch is switched to mig spool gun mode, otherwise the mig spool gun will
not work.The MIG torch switch is usually on the front panel of the machine or near the wire
feeding mechanism inside the machine.
1、The MIG torch switch near the wire feeding mechanism inside the machine
2、The MIG torch switch is on the front panel of the machine
4.3 How to welding aluminum:
Because aluminum dissipates heat very quickly, more heat is required during welding, and the cooling
speed of the workpiece is too fast, resulting in that the gas generated by various reasons cannot be

6
discharged in time during the welding process, resulting in the formation of pores. The melting point of
aluminum is only 600 ℃, and the welding current is slightly high, causing the workpiece to burn through.
Aluminum is also very easy to oxidize. The melting point of the surface Aluminum oxide is 2000 ℃, which
is very different from that of aluminum. The Aluminum oxide will form welding protection for aluminum;
Aluminum has good ductility and soft material, which makes wire feeding difficult; The expansion
coefficient of the welding line is large, and it is easy to deform and produce cracks, which brings great
difficulties to the welding of aluminum.
Precautions for aluminum welding:
Clean the oxide film on the aluminum surface with a stainless steel brush, and clean the aluminum
welding wire surface with acetone.
Select MIG mode for machine function and switch the gun mode to spool gun mode.
Correctly connect the spool gun to the machine(DCEP).
Install the aluminum welding wire with matching diameter to the spool gun.
Welding aluminum must be protected with 100% argon.
Push welding is adopted, which is called left welding, that is, push welding from the right to the left.
Select the appropriate current according to the thickness of aluminum material. You can try to start
with a small current until you find the appropriate current.
The position and angle of the gun head shall be adjusted according to the position of the welding
space, and the speed of the technique shall be determined according to experience. However,
when the molten pool is initially formed, the welding gun shall be pushed forward.

7
5 Daily maintenance and checking
5.1 Daily maintenance
Remove dust regularly with dry compressed air. If the welding machine is used in surroundings with
heavy smoke and polluted air, it is necessary to remove dust at least one time one month.
The pressure of compressed air shall fall to required level to prevent damage to small components
in the machine.
Examine inside electric joints and ensure perfect contact (Especially plugs and sockets). Fasten the
loosing joints. In case of oxidation, remove oxide film with sand paper and connect again.
Prevent water from entering into the machine and prevent the machine from getting moist. If any,
blow and dry. Measure the insulation with megohmmeter to make sure it is qualified to use.
If the welding machine is not used for a long time, pack the machine in original package and store in
dry surroundings.
Every time the wire feeder operates for 300hours, grind the electrical carbon brush and clear up the
armature commutator. Rinse speed reducer, apply 2# Molybdenum Disulfide lubricant to the turbine,
whirlpool rod and bearing.
All the maintenance and testing must be carried out when the power supply is totally cut off.
Please make sure the power is off before opening the closure.
5.2 Welding problems and solutions
The phenomenon listed below may happen due to relevant accessories used, welding material,
surroundings and power supply. Pleas improve surroundings and avoid these problems..
Arc starting difficulty. Arc interruption happens easily:
Examine whether the working clamp has good contact with the work pieces.
Examine all cable connections and make sure they are tight.
The output current fails to reach rated value:
The deviation of power voltage from rated value may cause the output current to not achieve the adjusted
value. When the power voltage is lower than rated value, the maximum output current may be lower than
rated value.
The current can not keep stable during operation:
This situation may relate to the following factors:
The voltage of electric power network changes;
Serious interference from electric power network or other electric facilities.
Porosity in welds:
Examine whether the gas supply circuit has any leaks.
Examine whether there is contaminants such as oil, dirt, rust, paint etc. on the surface.

8
6 Attention
The precautions listed in this manual are intended to ensure the safe use of the machine and to protect
you and others from harm and injury.
The design and manufacture of the welding machine power take full account of the safety, be sure to
comply with the precautions in this manual, otherwise it will cause serious accidents.
Wrong use of welding machine power supply will cause the following kinds of different degrees of harm
and injury. Please read this manual carefully to avoid or minimize such harm.
6.1 Welding environment and safety
Working surroundings
(1) Welding should be carried out in dry surroundings. The air humidity level should not be higher than
90%.
(2) The temperature should be between -10C to 40C.
(3) Don’t use the welding machines in sunshine or rain. Keep it dry.
(4) Don't use the machines in the places of dust or corrosive air.
(5) MIG welding should not be carried out in places with god ventilation.
Safety norms
Over-voltage, over-current and over-heating circuits are built into the welding machine. It will stop
working automatically when the input voltage, output current or internal temperature exceed the rated
value. But if the machines are excessively used, such as with input voltage higher than the rated, the
machine might be damaged. Please pay close attention to the following matters.
Keep good ventilation!
The welding machines work with high welding current.Normal air flow can’t provide the requirement of
heat dissipation. So the fans are installed as cooling system to ensure stable performance.
Make sure the ventilation windows are not covered or blocked. The distance between the machines and
things around it should not be less than 0.3m. Good ventilation is good for welding performance and
operational life.
Never over load!
Check the maximum rated current (according to the Duty Cycle chosen). Make sure the welding current
is never higher than the rated value. Over current running will obviously shortens the operational life, and
can even damage the machine.
Never over voltage!
The Input Voltage can be found in Technical data diagram.The auto-compensation function will keep
the welding current in the rated range. If the input voltage exceed the permissible value, the machine will
be damaged. Users should take protective measures in advance to avoid it.
Make sure earth connected before operation.
On the rear panel of welding machine, a screw for earth connecting would be found. It must be ground
connected with cable whose section is bigger than 6mm2 before operation, to avoid accidents caused by
static or electricity leak.
6.2 Symbol definition:
This Manual contains symbols as blow, please refer to their means expressed
Symbol Definition

9
Symbol Description
Touching any live electrical part may cause fatal electric shock or burns.
Welding fumes and gases are hazardous to health.
Working in tight places can cause suffocation due to lack of oxygen.
Splashes and hot finished base metal can cause a fire.
Poor cable connection, steel and other parent metal side current loop is not in full
contact, it will cause heat conduction and cause a fire.
Do not weld on containers containing flammable substances as this may cause an
explosion.
Do not weld sealed containers, such as tanks (boxes), pipes and other devices,
otherwise it will rupture.
Arc light can cause eye irritation or skin burns and other body injuries.
Spatter and welding slag can burn eyes or burn the skin.
Dumping cylinders can cause injury.
Cylinders with high pressure gas, wrong use can cause high pressure gas spouts,
causing accident.
Do not place fingers, hair, clothing, etc. near rotating parts such as cooling fans
The welding wire is shot from the torch and can stab eyes, face and other exposed
parts of the body
When lifting, staffs shall not be standing under the welder, or standing in front of the
movement, to prevent the welder falling injured.
To avoid accidents, please observe the following rules:
Do not use this machine for other works but welding.
The construction of the input power source, the setting of the installation site, the use of
high-pressure gas, storage and disposition, the storage of the workpiece after welding and the
disposal of waste shall be carried out in accordance with the relevant regulations.
Irrelevant staffs do not enter the welding work place.
Texts beginning with this symbol indicate potentially serious dangers and, if not
avoided, could result in serious accidents that could result in death or serious injury
to personnel.
Texts beginning with this symbol indicates a potentially hazardous situation that, if
not avoided, could result in minor injury to persons or property damage.
Texts beginning with this symbol indicate potential risks which, if not avoided, may
cause malfunction or damage to the equipment.

10
Pacemaker wearers should consult with their doctor before operating.
Please let qualified people or persons which with relevant knowledge and skills to install, operate,
maintain and repair the welder.
To ensure safety, please understand the contents of this manual.
To avoid electric shock, please observe the rules：
Do not touch live parts.
Let relevant technicians connect the welder and base metal grounding correctly.
It must switch off the power when installation, maintenance, and waiting 5 minutes before operation.
Capacitors can be charged, even if the power has been cut off, but also to ensure that the capacitor
is not charged voltage, and then operate.
Do not use cables that have insufficient cross-sectional area, damaged insulation sheath, or
exposed conductors
In the cable connection, please ensure the insulation.
Do not use the welder when the case opened or removed.
Do not use insulated gloves which is damaged or damped.
Please use safety net when working at height.
Regular maintenance and repair, and please repair the damaged parts before using.
When not in use, turn off all input power.
When using AC arc welder in narrow places or higher places, please observe the relevant national
and local standards and regulations.
To prevent fire and explosion, please observe the following rules：
Do not place flammable materials near the welding place.
Do not welding near flammable gas.
Do not place the hot finished base material close to flammable material.
When welding in the patio, on the ground and the wall, please remove the combustible materials on
the back.
The cable connected with the base metal as close as possible to the welding spot.
Do not welding gas-filled trachea, seal groove, etc.
Place a fire extinguisher near the welding work site to prevent the fire from happening.
To avoid breathing these fumes and gases hazardous to health, please use the
required protective equipment.
To prevent accidents such as gas poisoning and suffocation, please use the prescribed exhaust
facilities and use respiratory protection equipment.
To prevent welding fumes and other dust damage and poisoning, please use the prescribed local
exhaust equipment and respiratory protective equipment.
When working in cabinets, boilers, cabins, etc., CO2, which is heavier than air, stays at the bottom.