Lincoln Electric LF 33S User manual

IM3019

05/2021

REV03

LF 33S

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

12/05

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

Electromagnetic Compatibility (EMC).................................................................................................................................. 2

Safety.................................................................................................................................................................................. 3

Installation and Operator Instructions.................................................................................................................................. 5

WEEE ............................................................................................................................................................................... 10

Spare Parts ....................................................................................................................................................................... 10

REACh .............................................................................................................................................................................. 10

Authorized Service Shops Location .................................................................................................................................. 10

Electrical Schematic.......................................................................................................................................................... 10

Accessories....................................................................................................................................................................... 11

Connection configuration................................................................................................................................................... 12

English 1 English

Technical Specifications

NAME INDEX

LF 33S K14051-1

INPUT VOLTAGE WIRE FEED SPEED

34-44 Vac 1.0-20 m/min

RATED OUTPUT AT 40°C

Duty Cycle 40°C (based on a 10 min. period) Output Current

100% 385 A

60% 500 A

OUTPUT RANGE

Welding Current Range Maximum Open Circuit Voltage

20-500 A 113 Vdc or Vac peak

WIRE SIZES (mm)

Solid wires Cored wires Aluminium wires

0.6 to 1.6 1.2 to 2.4 1.0 to 1.6

PHYSICAL DIMENSIONS

Height Width Length Weight

350 mm 195 mm 530 mm 12 Kg

OTHERS

Protection Rating Maximum Gas Pressure

IP23 0,5 MPa (5 bar)

Operating Temperature Storage Temperature

from -10°C to +40°C from -25°C to 55°C

English 2 English

Electromagnetic Compatibility (EMC)

01/11

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.

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 3 English

Safety

01/11

WARNING

This equipment have to 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 equipment damage. 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 equipment damage. 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 equipment damage.

ELECTRIC SHOCK CAN KILL: Welding equipment generates high voltages. Do not touch the electrode,

work clamp, or connected work pieces when this equipment is turned on. Insulate yourself from the

electrode, work clamp, and connected work pieces.

ELECTRICALLY POWERED EQUIPMENT: Turn off the 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.

ELECTROMAGNETIC FIELD MAY BE DANGEROUS: Electric current flowing through any conductor

creates electromagnetic field (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. To protect the skin, use suitable clothing made

of durable, fireproof material. Protect other nearby personnel with suitable, non-flammable screening and

warn them not to watch the arc nor expose themselves to the arc.

English 4 English

WELDING SPARKS CAN CAUSE FIRE OR EXPLOSION: Remove fire hazards from the welding area

and have a fire extinguisher easily accessible. 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 use this equipment when flammable gases, vapors or flammable liquids 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 certificate, 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.

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 risk 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 5 English

Installation and Operator Instructions

Read this entire section before installation or operating the

machine.

Exploitation conditions

This machine can operate in harsh environments.

However, it is important to use the following simple

preventive measures that will ensure its long life and

reliable operation:

Do not place or operate this machine on a surface with

an incline higher than 15° 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. 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 away from the item.

This machine has a protection rating of IP23. Keep it

dry when possible and do not place it on a wet ground

or in puddles.

Locate the machine away from a radio controlled

machinery. Normal operation may adversely affect the

operation of a 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

Check the input voltage, phase, and frequency of the

power source that will be connected to this wire feeder.

The allowable input voltage of the power source is

indicated on the rating plate of the wire feeder. Verify the

connection of grounding wires from the power source to

the input source.

Controls and Operational Features

1. EURO Socket: or connecting welding torch.

2. WFS (Wire Feed Speed) Control Knob: It enables

continuous control of wire feeding speed in the range

from 1.0 to 20m/min.

WARNING

Before welding beginning and during Cold Inch Switch

using the Pro-welding Wire Speed Control Knob [16]

has also an influence on the wire feeding speed.

3. Output Voltage Control Knob: It enables continuous

control of welding voltage.

4. Local/Remote Switch: It changes the control of the

Output Voltage from the wire feeder Output Control

[3] to Remote Control Unit and vice versa.

5. Remote Control Receptacle: If a remote

control is used, it will be connected to the

remote receptacle (see Accessories for

ordering the desired unit).

6. Quick Connect Couplings (For water cooled model

only): For connecting water cooled torches.

Warm water from torch.

Cool water to torch.

7. Digital Display A: It shows the actual welding current

value (in A), and after finishing welding process, it

shows the average value of the welding current.

8. Digital Display V: It shows the actual value of

welding voltage (in V), and after finishing welding

process, it shows the average value of welding

voltage.

9. Fast-Mate Adapter: For connecting electrode touch.

English 6 English

10. Quick Connect Couplings: If water cooled torches are

used, connect water lines from water cooler here.

Refer to torch and water cooler guidelines for

recommended cooling liquid and flow rates.

11. Fast-Mate Adapter: Input power connection.

12. Gas Connector: Connection for gas line.

13. Amphenol Connection: 8-Pin connection to power

source.

19 20

16 171514 18

19 20

16 171514 18

14. Torch Mode Switch: It enables selection of 2-step or

4-step torch mode. The functionality of 2T/4T mode is

shown in the picture below:

↑Trigger pressed

↓Trigger released

A. Welding Current.

B. Burnback time.

C. WFS.

G. Gas.

15. Cold Inch / Gas Purge Switch: This switch enables

wire feeding or gas flow without turning on output

voltage.

16. Pre-welding wire speed control knob: Enables

change of the wire feed speed before starting

welding process in a range from 1,0 [m/min] to the

value which was set by WFS knob [2].

17. Burnback Time Control Knob: It enables to obtain

the desired length of electrode wire, which protrudes

from the tip of the torch after ending welding;

adjusting range from 20 to 320ms.

18. Gas Flow Regulator: Regulate flow between 0-25

LPM (liter/min.).

19. Wire Drive: 4-Roll wire drive compatible with 37mm

drive rolls.

20. Wire Spool Support: Maximum 5kg spools.

Accepts plastic, steel and fiber spools onto 51mm

spindle.

WARNING

The Linc Feed wire feeders must be used with the door

completely closed during welding.

Loading the Electrode Wire

Open the side cover of the machine.

Unscrew the fastening cap of the sleeve.

Load the spool with the wire on the sleeve such that the

spool turns clockwise 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.

WARNING

Sharp end of the wire can hurt.

Rotate the wire spool clockwise 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.

English 7 English

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 screw M8, which is

placed inside of the sleeve frame after unscrewing the

fastening cap of the sleeve.

21. Fastening cap.

22. Adjusting screw M8.

23. Pressing spring.

Turning the screw M8 clockwise increases the spring

tension and you can increase the brake torque.

Turning the screw M8 counterclockwise decreases the

spring tension and you can decrease the brake torque.

Adjusting of Force of Pressure Roll

Force

Pressure force is adjusted by turning the adjustment nut

clockwise to increase force, counterclockwise to decrease

force.

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

Connect the proper welding torch to the Euro socket, the

rated parameters of the torch and of the welding source

shall match.

Remove the gas diffuser and contact tip from the welding

torch.

Set the wire feeding speed in the position of about

10m/min by the WFS knob [2].

Switch the Cold Inch / Gas Purge switch [15] in the

position "Cold Inch" and keep in this position until the

electrode wire leaves the contact tip of the welding torch.

WARNING

Take precaution to keep eyes and hands away from the

end of the torch while feeding wire.

WARNING

Once the wire has finished feeding through the welding

gun turn the wire supply off before replacing to contact tip

and gas diffuser.

Welding methods

Welding with MIG / MAG method

To begin welding process with MIG/MAG method in

manual mode you should:

Switch ON the machine which supplies the wire

feeder.

Insert the electrode wire into the torch using "Cold

Inch" switch [15].

Check gas flow with "Gas Purge" switch [15].

According to selected welding mode and material

thickness set the proper welding voltage with knob [3]

and the wire feeding speed with WFS knob [2].

Obeying the appropriate rules, you can begin to weld.

Welding with MMA (SMAW) method

The LF33S wire feeder enable Manual Metal Arc welding

process that uses a consumable electrode coated in flux

by cooperating with CC (constant current) power sources

like DC 400, DC 655 or V350 PRO.

In order to start welding process with MMA method you

should:

Connect the wire feeder to over mentioned CC power

source by the combined cable.

Connect welding torch into output socket [9].

Switch the power source in CC mode.

Set required welding current by adjusting knob [3].

Obeying appropriate rules you can begin to weld.

LF33S compatibility functions with source

LF33S + CC/CV source

DC 400 DC 655 V 350 PRO

LF 33S Knob [3] Settings before welding

CC CV CC CV CC CV

V No √No √No √

A √No √No On source No

LF 33S Display during and after welding

CC CV CC CV CC CV

V √√√√√√

A √√√√√√

English 8 English

Changing Driving Rolls

The wire feeder is equipped with drive rolls for the wire of

1.0 and 1.2mm. For others wire sizes, is available the

proper drive rolls kit (see chapter Accessories for ordering

the desired kit). Below the drive rolls replacement

procedure:

Switch off the machine which supplies the wire feeder.

Release the pressure roll lever [24].

Unscrew the fastening cap [25].

Open the protection cover [27].

Change the drive rolls [26] with the compatible ones

corresponding to the used wire.

WARNING

For wires with the diameter greater than 1.6mm, the

following parts are to be changed:

The guide tube of the feeding console [28].

The guide tube of the Euro socket [29].

Replace and tighten the protection cover [27] to the

drive rolls.

Screw the protection cover by fastening screws [25].

Gas Connection

WARNING

CYLINDER may explode if damaged.

Always fix the gas cylinder securely in an

upright position, against a cylinder wall

rack or purpose-made cylinder cart.

Keep cylinder away from areas where i

may be damaged, heated or electrical

circuits to prevent possible explosion o

fire.

Keep cylinder away from welding or othe

live electrical circuits.

Never lift welder with cylinder attached.

Never allow welding electrode to touch

cylinder.

Build up of shielding gas may harm health

or kill. Use in a well-ventilated area to

avoid gas accumulation.

Close the gas cylinder valves thoroughl

when not in use to avoid leaks.

WARNING

Welding machine supports all suitable shielding gases at

a maximum pressure of 5,0 bar.

WARNING

Before use, make sure that the gas cylinder contains gas

suitable for the intended purpose.

Turn off input power at the welding power source.

Install a proper gas flow regulator to the gas cylinder.

Connect the gas hose to the regulator using the hose

clamp.

The other end of the gas hose connect to the gas

connector on the power source rear panel or directly

to the quick connector located on the rear panel of the

wire feeder [12]. More details you will find in power

source instruction manual.

Connect by dedicated interconnection cable (see

„Accessoriesʺchapter) wire feeder and power source.

Turn on input power at the welding power source.

Open the gas cylinder valve.

Adjust the shielding gas flow of the gas regulator.

Check gas flow with Gas Purge Switch [15].

WARNING

To weld GMAW process with CO2shielding gas, CO2gas

heater should be used.

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