Lincoln Electric QUICKMIG 250 User manual

IM3174
03/2022
REV03
QUICKMIG®250 & 300
OPERATOR’S MANUAL
ENGLISH
Lincoln Electric Bester Sp. z o.o.
ul. Jana III Sobieskiego 19A, 58-260 Bielawa, Poland
www.lincolnelectric.eu

English I English
THANK YOU! For choosing the QUALITY of the Lincoln Electric products.
Please check packaging and equipment for damage. Claims for material damaged in shipment must be notified
immediately to the dealer.
For ease of use, please enter your product identification data in the table below. Model Name, Code & Serial Number
can be found on the machine rating plate.
Model Name:
………………...…………………………….…………………………………………………………………………………………..
Code & Serial number:
………………….……………………………………………….. …………………………………………………….……………..
Date & Where Purchased:
………………………………………………………………... ……………………….…………………………………………..
ENGLISH INDEX
Technical Specifications ...............................................................................................................................................................1
ECO design information...............................................................................................................................................................3
Electromagnetic Compatibility (EMC) ..........................................................................................................................................5
Safety ...........................................................................................................................................................................................6
Introduction...................................................................................................................................................................................8
Installation and Operator Instructions ..........................................................................................................................................8
WEEE.........................................................................................................................................................................................18
Spare Parts.................................................................................................................................................................................18
REACh .......................................................................................................................................................................................18
Authorized Service Shops Location...........................................................................................................................................18
Electrical Schematic...................................................................................................................................................................18
Accessories ................................................................................................................................................................................19

English 1 English
Technical Specifications
NAME INDEX
QUICKMIG®250 K14379-1
QUICKMIG®300 K14380-1
INPUT
Input Voltage U1EMC Class Frequency
QUICKMIG®250 400V ± 10%, 3-phase A 50/60Hz
QUICKMIG®300
Process
Input Power at Rated
Cycle (40°C) Input Amperes I1max PF
QUICKMIG®250
GMAW/FCAW 13,5 kVA @ 35% Duty
Cycle 19,2 A 0,58
SMAW 15,5 kVA @ 25% Duty
Cycle 21,9 A 0,56
QUICKMIG®300 GMAW/FCAW 15 kVA @ 35% Duty Cycle 22,0 A 0,65
SMAW 14 kVA @ 35% Duty Cycle 19,8 A 0,62
RATED OUTPUT
Process
Open Circuit
Voltage
Duty Cycle 40°C
(based on a 10 min.
period)
Output Current Output Voltage
QUICKMIG®250
GMAW
72Vdc
35% 250A 26,5Vdc
60% 230A 25,5Vdc
100% 175A 22,8Vdc
FCAW
35% 250A 26,5Vdc
60% 230A 25,5Vdc
100% 175A 22,8Vdc
SMAW
35% 250A 30Vdc
60% 190A 27,6Vdc
100% 150A 26Vdc
QUICKMIG®300
GMAW
72Vdc
35% 300A 29Vdc
60% 230A 25,5Vdc
100% 175A 22,8Vdc
FCAW
35% 300A 29Vdc
60% 230A 25,5Vdc
100% 175A 22,8Vdc
SMAW
35% 250A 30Vdc
60% 190A 27,6Vdc
100% 150A 26Vdc
WELDING CURRENT RANGE
GMAW FCAW SMAW
QUICKMIG®250 50A÷250A 50A÷250A 10A÷250A
QUICKMIG®300 50A÷300A 50A÷300A 10A÷250A
RECOMMENDED INPUT CABLE AND FUSE SIZES
Fuse Type gR or Circuit Breaker Type D Power Lead
QUICKMIG®250 16A, 400V AC 4 Conductor, 2,5mm2
QUICKMIG®300 16A, 400V AC 4 Conductor, 2,5mm2

English 2 English
WELDING VOLTAGE REGULATION RANGE
GMAW FCAW
QUICKMIG®250 16,5 V ÷ 26,5 V 16,5 V ÷26,5 V
QUICKMIG®300 16,5 V ÷29 V 16,5 V ÷29 V
WIRE FEED SPEED RANGE / WIRE DIAMETER
WFS Range Drive Rolls Drive roll diameter
QUICKMIG®250 1.5 ÷ 18m/min 4 Ø30
QUICKMIG®300
Solid Wires Aluminum Wires Cored Wires
QUICKMIG®250 0.6 ÷ 1.2 mm 1.0 ÷ 1.2 mm 0.8 ÷ 1.0 mm
QUICKMIG®300
DIMENSION
Weight Height Width Length
QUICKMIG®250 49 kg 760 mm 395 mm 830 mm
QUICKMIG®300 50 kg
OTHERS
Protection Rating Maximum Gas Pressure Operating Humidity (t=20°C)
QUICKMIG®250 IP23 0,5MPa (5 bar) ≤90 %
QUICKMIG®300
Operating Temperature Storage Temperature
QUICKMIG®250 from -10°C to +40°C from -25°C to 55°C
QUICKMIG®300

English 3 English
ECO design information
The equipment has been designed in order to be compliant with the Directive 2009/125/EC and the Regulation
2019/1784/EU.
Efficiency and idle power consumption:
Index Name Efficiency when max power consumption
/ Idle power consumption Equivalent model
K14379-1 QUICKMIG®250 86% / 23W No equivalent model
K14380-1 QUICKMIG®300 86% / 23W No equivalent model
Idle state occurs under the condition specified in below table
IDLE STATE
Condition Presence
MIG mode X
TIG mode
STICK mode
After 30 minutes of non-working
Fan off X
The value of efficiency and consumption in idle state have been measured by method and conditions defined in the product
standard EN 60974-1:20XX.
Manufacturer’s name, product name, code number, product number, serial number and date of production can be read from
rating plate.
XXXXXXXXXX
Code: XXXXX XXXXXX-X
S/N: P1YYMMXXXXX
12
34
5
P1 YY MM XXXXX
5A5A 5B 5D5C
XXXXXXX
Where:
1-Manufacturer name and address
2-Product name
3-Code number
4-Product number
5-Serial number
5A- country of production
5B- year of production
5C- month of production
5D- progressive number different for each machine

English 4 English
Typical gas usage for MIG/MAG equipment:
Material type
Wire
diameter
[mm]
DC electrode positive Wire Feeding
[m/min] Shielding Gas Gas flow [l/min]
Current
[A]
Voltage
[V]
Carbon, low
alloy steel 0,9 ÷ 1,1 95 ÷ 200 18 ÷ 22 3,5 – 6,5 Ar 75%, CO225% 12
Aluminium 0,8 ÷ 1,6 90 ÷ 240 18 ÷ 26 5,5 – 9,5 Argon 14 ÷ 19
Austenic
stainless steel 0,8 ÷ 1,6 85 ÷ 300 21 ÷ 28 3 - 7 Ar 98%, O22% / He 90%, Ar 7,5% CO22,5% 14 ÷ 16
Copper alloy 0,9 ÷ 1,6 175 ÷ 385 23 ÷ 26 6 - 11 Argon 12 ÷ 16
Magnesium 1,6 ÷ 2,4 70 ÷ 335 16 ÷ 26 4 - 15 Argon 24 ÷ 28
TIG Process:
In TIG welding process, gas usage depends on cross-sectional area of the nozzle. For commonly used torches:
Helium: 14-24 l/min
Argon: 7-16 l/min
Notice: Excessive flow rates causes turbulence in the gas stream which may aspirate atmospheric contamination into the
welding pool.
Notice: A cross wind or draft moving can disrupt the shielding gas coverage, in the interest of saving of protective gas use
screen to block air flow.
End of life
At end of life of product, it has to be disposal for recycling in accordance with Directive 2012/19/EU (WEEE), information
about the dismantling of product and Critical Raw Material (CRM) present in the product, can be found at
https://www.lincolnelectric.com/en-gb/support/Pages/operator-manuals-eu.aspx

English 5 English
Electromagnetic Compatibility (EMC)
11/04
This machine has been designed in accordance with all relevant directives and standards. However, it may still generate
electromagnetic disturbances that can affect other systems like telecommunications (telephone, radio, and television) or
other safety systems. These disturbances can cause safety problems in the affected systems. Read and understand this
section to eliminate or reduce the amount of electromagnetic disturbance generated by this machine.
This machine has been designed to operate in an industrial area. To operate in a domestic area it is
necessary to observe particular precautions to eliminate possible electromagnetic disturbances. The operator
must install and operate this equipment as described in this manual. If any electromagnetic disturbances are
detected the operator must put in place corrective actions to eliminate these disturbances, if necessary with
assistance from Lincoln Electric.
WARNING
Provided that the public low voltage system impedance at the point of common coupling is lower than:
58 mΩfor the QUICKMIG®250
59,9 mΩfor the QUICKMIG®300
This equipment is compliant with IEC 61000-3-11 and IEC 61000-3-12 and can be connected to public low voltage
systems. It is the responsibility of the installer or user of the equipment to ensure, by consultation with the distribution
network operator if necessary, that the system impedance complies with the impedance restrictions.
Before installing the machine, the operator must check the work area for any devices that may malfunction because of
electromagnetic disturbances. Consider the following.
Input and output cables, control cables, and telephone cables that are in or adjacent to the work area and the machine.
Radio and/or television transmitters and receivers. Computers or computer controlled equipment.
Safety and control equipment for industrial processes. Equipment for calibration and measurement.
Personal medical devices like pacemakers and hearing aids.
Check the electromagnetic immunity for equipment operating in or near the work area. The operator must be sure that
all equipment in the area is compatible. This may require additional protection measures.
The dimensions of the work area to consider will depend on the construction of the area and other activities that are
taking place.
Consider the following guidelines to reduce electromagnetic emissions from the machine.
Connect the machine to the input supply according to this manual. If disturbances occur if may be necessary to take
additional precautions such as filtering the input supply.
The output cables should be as short as possible and positioned together as close as possible to each other. If
possible connect the work piece to ground in order to reduce the electromagnetic emissions. The operator must check
that connecting the work piece to ground does not cause problems or unsafe operating conditions for personnel and
equipment.
Shielding of cables in the work area can reduce electromagnetic emissions. This may be necessary for special
applications.
WARNING
EMC classification of this product is class A in accordance with electromagnetic compatibility standard EN 60974-10 which
means that the product is designed to be used in an industrial environment only.
WARNING
The Class A equipment is not intended for use in residential locations where the electrical power is provided by the public
low-voltage supply system. There may be potential difficulties in ensuring electromagnetic compatibility in those locations,
due to conducted as well as radiated disturbances.

English 6 English
Safety
11/04
WARNING
This equipment must be used by qualified personnel. Be sure that all installation, operation, maintenance and repair
procedures are performed only by qualified person. Read and understand this manual before operating this equipment.
Failure to follow the instructions in this manual could cause serious personal injury, loss of life, or damage to this equipment.
Read and understand the following explanations of the warning symbols. Lincoln Electric is not responsible for damages
caused by improper installation, improper care or abnormal operation.
WARNING: This symbol indicates that instructions must be followed to avoid serious personal injury, loss
of life, or damage to this equipment. Protect yourself and others from possible serious injury or death.
READ AND UNDERSTAND INSTRUCTIONS: Read and understand this manual before operating this
equipment. Arc welding can be hazardous. Failure to follow the instructions in this manual could cause
serious personal injury, loss of life, or damage to this equipment.
ELECTRIC SHOCK CAN KILL: Welding equipment generates high voltages. Do not touch the electrode,
work clamp, or connected work pieces when this equipment is on. Insulate yourself from the electrode, work
clamp and connected work pieces.
ELECTRICALLY POWERED EQUIPMENT: Turn off input power using the disconnect switch at the fuse
box before working on this equipment. Ground this equipment in accordance with local electrical
regulations.
ELECTRICALLY POWERED EQUIPMENT: Regularly inspect the input, electrode, and work clamp
cables. If any insulation damage exists replace the cable immediately. Do not place the electrode holder
directly on the welding table or any other surface in contact with the work clamp to avoid the risk of
accidental arc ignition.
ELECTRIC AND MAGNETIC FIELDS MAY BE DANGEROUS: Electric current flowing through any
conductor creates electric and magnetic fields (EMF). EMF fields may interfere with some pacemakers and
welders having a pacemaker shall consult their physician before operating this equipment.
CE COMPLIANCE: This equipment complies with the European Community Directives.
ARTIFICIAL OPTICAL RADIATION: According with the requirements in 2006/25/EC Directive and EN
12198 Standard, the equipment is a category 2. It makes mandatory the adoption of Personal Protective
Equipment (PPE) having filter with a protection degree up to a maximum of 15, as required by EN169
Standard.
FUMES AND GASES CAN BE DANGEROUS: Welding may produce fumes and gases hazardous to
health. Avoid breathing these fumes and gases. To avoid these dangers the operator must use enough
ventilation or exhaust to keep fumes and gases away from the breathing zone.
ARC RAYS CAN BURN: Use a shield with the proper filter and cover plates to protect your eyes from
sparks and the rays of the arc when welding or observing. Use suitable clothing made from durable
flame-resistant material to protect you skin and that of your helpers. Protect other nearby personnel with
suitable, non-flammable screening and warn them not to watch the arc nor expose themselves to the arc.

English 7 English
WELDING SPARKS CAN CAUSE FIRE OR EXPLOSION: Remove fire hazards from the welding area
and have a fire extinguisher readily available. Welding sparks and hot materials from the welding process
can easily go through small cracks and openings to adjacent areas. Do not weld on any tanks, drums,
containers, or material until the proper steps have been taken to insure that no flammable or toxic vapors
will be present. Never operate this equipment when flammable gases, vapors or liquid combustibles are
present.
WELDED MATERIALS CAN BURN: Welding generates a large amount of heat. Hot surfaces and
materials in work area can cause serious burns. Use gloves and pliers when touching or moving materials in
the work area.
CYLINDER MAY EXPLODE IF DAMAGED: Use only compressed gas cylinders containing the correct
shielding gas for the process used and properly operating regulators designed for the gas and pressure
used. Always keep cylinders in an upright position securely chained to a fixed support. Do not move or
transport gas cylinders with the protection cap removed. Do not allow the electrode, electrode holder, work
clamp or any other electrically live part to touch a gas cylinder. Gas cylinders must be located away from
areas where they may be subjected to physical damage or the welding process including sparks and heat
sources.
A GAS CYLINDER can be used with this machine. In this case, place the gas cylinder on the back of the
machine on the shelf intended for this and secure it by attaching it to the machine with chains. The height of
the cylinder cannot exceed 1.65m.
MOVING PARTS ARE DANGEROUS: There are moving mechanical parts in this machine, which can
cause serious injury. Keep your hands, body and clothing away from those parts during machine starting,
operating and servicing.
SAFETY MARK: This equipment is suitable for supplying power for welding operations carried out in an
environment with increased hazard of electric shock.
The manufacturer reserves the right to make changes and/or improvements in design without upgrade at the same time the
operator’s manual.

English 8 English
Introduction
The welding machines QUICKMIG®250 and
QUICKMIG®300 can be used for welding in below
methods:
GMAW
FCAW
SMAW
The complete package contains:
Work lead with ground clamp – 3m,
Gas hose – 2m,
Drive roll V0.8/1.0 for solid wire (assembly in the wire
feeder).
Recommended equipment, which can be bought by user,
was mentioned in the chapter "Accessories".
Installation and Operator Instructions
Read this entire section before installation or operation of
the machine.
Location and Environment
This machine will operate in harsh environments.
However, it is important that simple preventative measures
are followed to assure long life and reliable operation.
Do not place or operate this machine on a surface with
an incline greater than 10° from horizontal.
Do not use this machine for pipe thawing.
This machine must be located where there is free
circulation of clean air without restrictions for air
movement to and from the air vents. Do not cover the
machine with paper, cloth or rags when switched on.
Dirt and dust that can be drawn into the machine
should be kept to a minimum.
This machine has a protection rating of IP23. Keep it
dry when possible and do not place it on wet ground or
in puddles.
Locate the machine away from radio controlled
machinery. Normal operation may adversely affect
the operation of nearby radio controlled machinery,
which may result in injury or equipment damage.
Read the section on electromagnetic compatibility in
this manual.
Do not operate in areas with an ambient temperature
greater than 40°C.
Duty cycle and Overheating
The duty cycle of a welding machine is the percentage of
time in a 10 minute cycle at which the welder can operate
the machine at rated welding current.
Example: 60% duty cycle
Welding for 6 minutes. Break for 4 minutes.
Excessive extension of the duty cycle will cause the
thermal protection circuit to activate.
Minutes or decrease
Duty Cycle
Input Supply Connection
WARNING
Only a qualified electrician can connect the welding
machine to the supply network. Installation had to be made
in accordance with the appropriate National Electrical
Code and local regulations.
Check the input voltage, phase and frequency supplied to
this machine before turning it on. Verify the connection of
ground wires from the machine to the input source. The
welding machine QUICKMIG®250, QUICKMIG®300,
must be connected to a correctly installed plug-in socket
with an earth pin.
Input voltage is three-phase 400VAC, 50/60Hz. For more
information about input supply refer to the technical
specification section of this manual and to the rating plate
of the machine.
Make sure that the amount of mains power available from
the input supply is adequate for normal operation of the
machine. The necessary delayed fuse (or circuit breaker
with "D" characteristic) and cable sizes are indicated in the
technical specification section of this manual.
WARNING
The welding machine can be supplied from a power
generator of output power at least 30% larger than input
power of the welding machine.
WARNING
When powering welder from a generator be sure to turn off
welder first, before generator is shut down, in order to
prevent damage to welder!
Output Connections
Refer to points [1], [3] and [4] of the figures below.

English 9 English
Controls and Operational Features
3
4
5
1
2
Figure 1
1. EURO Socket: For connecting a welding gun (for
GMAW / FCAW processes).
2. Lead of Changing Polarity of EURO socket.
3. Positive Output Socket for the Welding Circuit:
For connecting an electrode holder with lead /
work lead depending on the require
configuration.
4. Negative Output Socket for the Welding
Circuit: For connecting an electrode holder
with lead / work lead depending on the require
configuration.
5. User Interface: See “User Interface” chapter.
6
7
8
Figure 2
6. Gas Connector: Connection for gas line.
7. Power Switch ON/OFF (I/O): Controls the input power
to the machine. Be sure the power source is connected
to the mains supply before turning power on ("I").
8. Power Lead (3,4m): Connect the supply plug to the
existing input cable that is rated for the machine as
indicated in this manual, and conforms to all applicable
standards. This connection shall be performed by a
qualified person only.

English 10 English
910 12
11
Figure 3
9. Spooled Wire (for GMAW / FCAW): Not supplied as
standard.
10. Wire Spool Holder: Maximum 15kg spools. Maximum
300mm diameter spools. Holder allows mounting
plastic, steel and fiber spools onto 51 mm spindle.
Note: Plastic Brake Nut has a Left-hand thread.
11. Wire drive: 4-rolls wire drive.
12. Switch: Cold Inch / Gas Purge: This switch allows wire
feeding (wire test) and gas flow (gas test) without
switching on the output voltage.
User Interface
13
14
15 16 17 18
19
20
21
22
23
24
25
26
27
28
29
30
Figure 4
13. Thermal Overload Indicator: It indicates that the
machine is overloaded or that the cooling is not
sufficient. Displays show: “ALA ot” = Alarm Over
Temperature message.
14. Input Power Indicator: This LED lights up when the
welding machine is ON and is ready to work.
15. Left Display: Shows wire feed speed or welding
current. During welding shows the actual welding
current value.
16. Output Current LED Indicator: Informs that the Left
Display shows the output current in ampere.
17. Wire Feed Speed LED Indicator: Informs that the Left
Display shows the wire feed speed in m/min.
18. Right Display: Depending on the selected function and
the welding program shows the welding voltage in volts
or value of Arc Force. During welding shows the actual
output welding voltage.
19. Inductance Control: Adjusts the hardness of the arc. A
low value (1-4) makes the arc harder (more spatter),
while a high value (8-10) produces a softer arc (less
spatter). Adjustment range: 0 to +10.

English 11 English
20. Wire Diameter or Manual Mode Selection Button: Sets
the diameter of the welding wire for Synergic Mode or
choose Manual Mode.
Process Symbol Description
0.6 Available wire diameter depends
on choosing gas shielding type,
type of wire and welding wire
material.
0.8
0.9
1.0
1.2
The machine works in Manual
mode. Welding parameters (wire
feed speed and voltage) are
selected by the user.
21. Wire Material Selection Button: sets the type of wire
materials (for Synergic Mode only):
Process Symbol Description
Fe Steel
Al Aluminum
SS Stainless steel
22. Burnback Time Selection Button – for Synergic and
Manual Mode, allow to choose and set burnback time:
Process Symbol Description
Burnback Time - amount of time
that the welding is continued after
the wire stops feeding. It prevents
the wire from sticking in the puddle
and prepares the end of the wire
for the next arc ignition.
Regulation range: from 0,02 to
0,25 seconds.
23. Welding Wire Type Selection Button: Set welding wire
type (for Synergic Mode only):
Process Symbol Description
For Synergic Mode only
Gas shield required
24. Run-In WFS Button: Allow to show and set the Run-in
wire feed speed value (for Synergic and Manual Mode):
Process Symbol Description
Run-in WFS – sets the wire feed
speed from the time the trigger is
pulled until an arc is established.
Adjust range: from 20 to 100
percent of the WFS value.
When Run-In value is more
than max WFS, machine keep
max WFS.
25. Gas Selection Button: Enables the selection of the type
of shielding gas (for Synergic Mode only).
Process Symbol Description
To choose gas shielding.
26. Selection Button to Display Workpoint as WFS or A:
Allows to change the operating point display as wire
feed speed (WFS) in [m/min] or as an output current
value in [A]. Only available in synergic mode.
Process Symbol Description
Workpoint values are displayed in
m/min.
Workpoint values are displayed as an
amperage [A].

English 12 English
27. Torch Trigger Mode Button (2-Step/4-Step): Change
the function of the torch trigger.
Process Symbol Description
2-Step trigger operation turns
welding on and off as direct
response to the trigger. Welding
process starts when the torch
trigger is press.
4-Step mode allows to continue
welding, when the torch trigger is
released. To stop welding, the
torch trigger should be pressed
again.4-step model facilitates to
make long welds.
Trigger Pulled Arc Established
Trigger Released
We ld IdleIdl e S t rike
Wel d
Weld
Off
Off
Off
On
Burnback
time
QUICKMIG 250 300 2T/ Mode
®
Trigger Pulled 1 Arc Established
WeldIdl e S t rike
Wel d
Weld
Off
Off
Off
On
Burnback
time
QUICKMIG 250 300 T/ 4 Mode
®
Trigger Released 1
Idle
Trigger Released 2 Trigger Pulled 2
Figure 5
28. Welding Process Selection Button: Allow to choose the
welding process:
Symbol Description
GMAW/FACW welding mode.
SMAW welding mode.
29. The Center Control: Sets the value shown on the right
display. Depending on welding processes or selected
function can be set:
Process Symbol Description
The welding voltage (also during
welding).
Burnback Time
Adjust range: from 0.02 to 0.25
seconds
Run-in WFS
Adjust range: from 20 to 100
percent of the WFS value.
ARC FORCE, the output current is
temporarily increased to clear
short circuit connections between
the electrode and the workpiece.
Lower values will provide less
short circuit current and a softer
arc. Higher settings will provide a
higher short circuit current, a more
forceful arc and possibly more
spatter.
Adjust range: from 0 to 100.
30. Left Control: Sets the value shown on the left display.
Depending on welding process can be set:
Process Mark Description
Workpoint values are displayed in
m/min.
Workpoint values are displayed as an
amperage [A].

English 13 English
Welding SMAW Process
QUICKMIG®250, QUICKMIG®300 does not include the
electrode holder with lead necessary for SMAW welding,
but the one can be purchased separately.
Procedure of begin welding of SMAW process:
First turn the machine off.
Determine the electrode polarity for the electrode to be
used. Consult the electrode data for this information.
Depending on the polarity of using electrode, connect
the work lead and the electrode holder with lead to
output socket [3] or [4] and lock them. See the Table 1.
Table 1.
Output socket
POLARITY
DC (+)
The electrode holder
with lead to SMAW [3]
Work lead [4]
DC (-)
The electrode holder
with lead to SMAW [3]
Work lead [4]
Connect the work lead to the welding piece with the
work clamp.
Install the proper electrode in the electrode holder.
Turn the welding machine on.
Set welding mode to SMAW.
Set the welding parameters.
The welding machine is now ready to weld.
By applying the principle of occupational health and
safety at welding, welding can be begun.
User can set functions:
The welding current
Arc dynamics ARC FORCE
Welding GMAW, FCAW Process
QUICKMIG®250, QUICKMIG®300 can be used to
welding GMAW, FCAW-GS, FCAW-SS process.
NOTE: Welding FCAW-SS process is possible in Manual
Mode only.
In QUICKMIG®250, QUICKMIG®300 can be set:
Wire Feed Speed, WFS
The welding voltage
Burnback Time
Run-in WFS
2-Step/4-Step
Polarization DC+/DC-
Inductance
Preparation the Machine for Welding
GMAW and FCAW Process.
Procedure of welding in GMAW or FCAW process:
Determine the wire polarity for the wire to be used.
Consult the wire data for this information.
Connect output the gas-cooled gun to GMAW / FCAW
process to Euro Socket [1].
Depending on the using wire, connect the work lead
to output socket [3] or [4]. See the Table 2.
Table 2
Output socket
POLARITY
DC (+)
Lead of Changing
Polarity [2] [3]
Work lead [4]
DC (-)
Lead of Changing
Polarity [2] [3]
Work lead [4]
Connect the work lead to the welding piece with the
work clamp.
Install the proper wire.
Install the proper drive roll.
Make sure, if it is needed (GMAW, FCAW-GS
processes), that the gas shield has been connected.
Turn the machine on.
Push the Cold Inch Switch [12] to feed the wire through
the gun liner until the wire comes out of the threaded
end.
Install a proper contact tip.
Check gas flow with Gas Purge Switch [12] – GMAW
and FCAW processes.
Close the left side panel.
Set welding mode to GMAW
The welding machine is now ready to weld.
By applying the principle of occupational health and
safety at welding, welding can be begun.

English 14 English
Welding GMAW Process in synergic
mode
In synergic mode, the welding load voltage is not set by
user. The correct welding load voltage will set by the
machine’s software.
The optimum output welding voltage is automatically set by
the machine when changing the wire feed speed m/min or
the output current value in A, depending on the selected
workpoint. Table 3 below show all available synergic
welding programs.
Table 3
Wire Diameter Wire type Wire Material Gas Type
0.6 Solid Fe CO2
0.8 Solid Fe CO2
0.9 Solid Fe CO2
1.0 Solid Fe CO2
1.2 Solid Fe CO2
0.6 Solid Fe MIX
0.8 Solid Fe MIX
0.9 Solid Fe MIX
1.0 Solid Fe MIX
1.2 Solid Fe MIX
0.8 Solid Ss MIX
0.9 Solid Ss MIX
1.0 Solid Ss MIX
1.2 Solid Ss MIX
0.8 Flux-Cored Fe CO2
0.9 Flux-Cored Fe CO2
1.0 Flux-Cored Fe CO2
1.2 Flux-Cored Fe CO2
0.8 Flux-Cored Fe MIX
0.9 Flux-Cored Fe MIX
1.0 Flux-Cored Fe MIX
1.2 Flux-Cored Fe MIX
1.0 Solid Al Ar
1.2 Solid Al Ar

English 15 English
Loading the Electrode Wire
Depending on the type of wire spool it can be installed on
the wire spool support without adapter or installed with use
applicable adapter that must be purchased separately
(see "Accessories" chapter).
WARNING
Turn the input power OFF at the welding power source
before installation or changing a wire spool.
Turn the machine off.
Open the side cover of the machine.
Unscrew the locking nut of the sleeve.
Load the spool with the wire on the sleeve such that the
spool turns anticlockwise when the wire is fed into the
wire feeder.
Make sure that the spool locating pin goes into the
fitting hole on the spool.
Screw in the fastening cap of the sleeve.
Put on the wire roll using the correct groove
corresponding to the wire diameter.
Free the end of the wire and cut off the bent end
making sure it has no burr.
The device is adapted to the spool max. 300mm
WARNING
Sharp end of the wire can hurt.
Rotate the wire spool anticlockwise and thread the end
of the wire into the wire feeder as far as the Euro
socket.
Adjust force of pressure roll of the wire feeder properly.
Adjustments of Brake Torque of Sleeve
To avoid spontaneous unrolling of the welding wire the
sleeve is fitted with a brake.
Adjustment is carried by rotation of its Allen screw M8,
which is placed inside of the sleeve frame after unscrewing
the fastening cap of the sleeve.
33
32
31
Figure 6
31. Fastening cap.
32. Adjusting Allen screw M8.
33. Pressing spring.
Turning the Allen screw M8 anticlockwise increases the
spring tension and you can increase the brake torque
Turning the Allen screw M8 clockwise decreases the
spring tension and you can decrease the brake torque.
After finishing of adjustment, you should screw in the
fastening cap again.
Adjusting of Force of Pressure Roll
Force
The pressure arm controls the amount of force the drive
rolls exert on the wire.
Pressure force is adjusted by turning the adjustment nut
clockwise to increase force, counterclockwise to decrease
force. Proper adjustment of pressure arm gives the best
welding performance.
WARNING
If the roll pressure is too low the roll will slide on the wire. If
the roll pressure is set too high the wire may be deformed,
which will cause feeding problems in the welding gun. The
pressure force should be set properly. Decrease the
pressure force slowly until the wire just begins to slide on
the drive roll and then increase the force slightly by turning
of the adjustment nut by one turn.
Inserting Electrode Wire into Welding
Torch
Turn the welding machine off.
Depending on welding process, connect the proper gun
to the euro socket, the rated parameters of the gun and
of the welding machine should be matched.
Remote the nozzle from the gun and contact tip or
protection cap and contact tip. Next, straighten the gun
out flat.
Turn the welding machine on.
Push the Cold Inch Switch [12] to feed the wire through
the gun liner until the wire comes out of the threaded
end.
When switch is released spool of wire should not
unwind.
Adjust wire spool brake accordingly.
Turn the welding machine off.
Install a proper contact tip.
Depending on the welding process and the type of the
gun, install the nozzle (GMAW process) or protection
cap (FCAW- process).
WARNING
Take precaution to keep eyes and hands away from the
end of the gun while the wire is being come out of the
threated end.

English 16 English
Changing Driving Rolls
WARNING
Turn the input power off of the welding power source
before installation or changing drive rolls.
QUICKMIG®250, QUICKMIG®300 is equipped with drive
roll V0.8/V1.0 for steel wire. For others wire type or / and
diameter, the proper drive rolls kit you can find in
ʺAccessoriesʺchapter and follow instructions:
Turn the input power OFF.
Unlock 2 rolls by turning 2 Quick-Change Carrier Gear
[38].
Release the pressure roll levers [39].
Change the drive rolls [37] corresponding to the used
wire.
WARNING
Be sure that the gun liner and contact tip are also sized to
match the selected wire size.
WARNING
For wires with the diameter larger than 1.6mm, the
following parts have to be changed:
The guide tube of the feeding console [35] and [36].
The guide tube of the Euro Socket [34].
Lock 2 new rolls by turning 2 Quick-Change Carrier
Gear [38].
Insert the wire through the guide tube, over the roller
and through the guide tube of Euro Socket into liner of
gun. The wire can be pushed into the liner manually for
a few centimeters, and should feed easily and without
any force.
Lock the pressure roll lever [39].
37
36
35
34
38
39
Figure 7
Gas Connection
A gas cylinder must be installed with a proper flow
regulator. Once a gas cylinder with a flow regulator has
been securely installed, connect the gas hose from the
regulator to the machine gas inlet connector.
WARNING
The welding machine supports all suitable shielding gases
including carbon dioxide, argon and helium at a maximum
pressure of 5,0 bars.
Transport & Lifting
WARNING
Falling equipment can cause injury and
damage to unit.
Figure 8
During transportation and lifting with a crane, adhere to the
following rules:
Power source does not include the eye bolt which can
be used to transport or lifting the machine.
To lift use of suitable lifting equipment capacity.
To lifting and transport use a travers and minimum two
belts.
Lift only power source without gas cylinder, cooler and
wire feeder, or/and any other accessories.

English 17 English
Maintenance
WARNING
For any repair operations, modifications or maintenances,
it is recommended to contact the nearest Technical
Service Center or Lincoln Electric. Repairs and
modifications performed by unauthorized service or
personnel will cause, that the manufacturer’s warranty will
become null and void.
Any noticeable damage should be reported immediately
and repaired.
Routine maintenance (everyday)
Check condition of insulation and connections of the
work leads and insulation of power lead. If any
insulation damage exists replace the lead immediately.
Remove the spatters from the welding gun nozzle.
Spatters could interfere with the shielding gas flow to
the arc.
Check the welding gun condition: replace it, if
necessary.
Check condition and operation of the cooling fan. Keep
clean its airflow slots.
Periodic maintenance (every 200 working hours but at
list once every year)
Perform the routine maintenance and, in addition:
Keep the machine clean. Using a dry (and low
pressure) airflow, remove the dust from the external
case and from the cabinet inside.
If it is required, clean and tighten all weld terminals.
The frequency of the maintenance operations may vary in
accordance with the working environment where the
machine is placed.
WARNING
Do not touch electrically live parts.
WARNING
Before the case of welding machine will be removed, the
welding machine had to be turned off and the power lead
had to be disconnected from mains socket.
WARNING
Mains supply network must be disconnected from the
machine before each maintenance and service. After each
repair, perform proper tests to ensure safety.
Customer Assistance Policy
The business of The Lincoln Electric Company is
manufacturing and selling high quality welding equipment,
consumables, and cutting equipment. Our challenge is to
meet the needs of our customers and to exceed their
expectations. On occasion, purchasers may ask Lincoln
Electric for advice or information about their use of our
products. We respond to our customers based on the best
information in our possession at that time. Lincoln Electric
is not in a position to warrant or guarantee such advice,
and assumes no liability, with respect to such information
or advice. We expressly disclaim any warranty of any kind,
including any warranty of fitness for any customer’s
particular purpose, with respect to such information or
advice. As a matter of practical consideration, we also
cannot assume any responsibility for updating or correcting
any such information or advice once it has been given, nor
does the provision of information or advice create, expand
or alter any warranty with respect to the sale of our
products
Lincoln Electric is a responsive manufacturer, but the
selection and use of specific products sold by Lincoln
Electric is solely within the control of, and remains the sole
responsibility of the customer. Many variables beyond the
control of Lincoln Electric affect the results obtained in
applying these types of fabrication methods and service
requirements.
Subject to Change – This information is accurate to the
best of our knowledge at the time of printing. Please refer
to www.lincolnelectric.com for any updated information.

English 18 English
WEEE
07/06
Do not dispose of electrical equipment together with normal waste!
In observance of European Directive 2012/19/EC on Waste Electrical and Electronic Equipment (WEEE)
and its implementation in accordance with national law, electrical equipment that has reached the end of its
life must be collected separately and returned to an environmentally compatible recycling facility. As the
owner of the equipment, you should get information on approved collection systems from our local
representative.
By applying this European Directive you will protect the environment and human health!
Spare Parts
12/05
Part List reading instructions
Do not use this part list for a machine if its code number is not listed. Contact the Lincoln Electric Service Department for
any code number not listed.
Use the illustration of assembly page and the table below to determine where the part is located for your particular code
machine.
Use only the parts marked "X" in the column under the heading number called for in the assembly page (# indicate a
change in this printing).
First, read the Part List reading instructions above, then refer to the "Spare Part" manual supplied with the machine that
contains a picture-descriptive part number cross-reference.
REACh
11/19
Communication in accordance with Article 33.1 of Regulation (EC) No 1907/2006 – REACh.
Some parts inside this product contain:
Bisphenol A, BPAEC 201-245-8, , CAS 80-05-7
Cadmium,EC 231-152-8, CAS 7440-43-9
Lead,EC 231-100-4, CAS 7439-92-1
Phenol, 4-nonyl-, branched,EC 284-325-5, CAS 84852-15-3
in more than 0,1% w/w in homogeneous material. These substances are included in the “Candidate List of Substances of
Very High Concern for Authorisation” of REACh.
Your particular product may contain one or more of the listed substances.
Instructions for safe use:
use according to Manufacturer instructions, wash hands after use;
keep out of reach of children, do not put in mouth,
dispose in accordance with local regulations.
Authorized Service Shops Location
09/16
The purchaser must contact a Lincoln Authorized Service Facility (LASF) about any defect claimed under Lincoln's
warranty period.
Contact your local Lincoln Sales Representative for assistance in locating a LASF or go to
www.lincolnelectric.com/en-gb/Support/Locator.
Electrical Schematic
Refer to the "Spare Part" manual supplied with the machine.