Linolit 550 User manual

GRINDING AND POLISHING
MACHINE 550
GRINDING AND POLISHING
MACHINE 750
Instruction manual

CONTENT
1. Introduction 2
2. Presentation 3
2.1. Responsibility of the owner 3
2.2. Right of the manufacturer 3
2.3. Structure and functions 3
3. Description 4
4. Protection 7
4.1. Start 7
4.2. Emergency stop 8
5. Operation 9
5.1. General safety precautions 9
5.2. Workplace safety 9
5.3. Electrical safety 9
5.4. Personal safety 11
5.5. Personal protective equipment 12
5.6. Adjustment of position of the grip 14
5.7. Connecting the vacuum cleaner 15
5.8. Instructions for grinding. Abrasive tools 15
5.9. Concrete hardness testing 16
5.10. Selection of abrasive tools 17
5.11. Replacement of abrasive tools 18
6. Transport and storage 19
7. Start and stop 20
7.1. Before starting 20
7.2. Start 20
7.3. Stop 20
8. Technical maintenance 21
9. Technical characteristics 22

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1. INTRODUCTION
Warning! If the machine is used incorrectly, it can be a
dangerous tool that can cause serious injuries or even death.
Before operating the machine, please read the instructions
carefully and make sure you understand them.
Use personal protective equipment (see chapter
"Personal protective equipment").
Warning! Grinding produces dust and inhalation of
dust may result in injuries. Use the respirator. Always
provide adequate ventilation.
This machine is in accordance with EU regulations. This
product should not be disposed of as household waste. In
ensuring the proper disposal of this product you will help to
prevent potential negative consequences for the environment
and human health, which may be caused by improper
processing of the product.
POLIRTLAK d.o.o.
Štihova ulica 10, 1000 Ljubljana, Slovenija
GRINDING AND POLISHING MACHINE LINOLIT
Weight: 410 kg
Rotating speed: 0-1000 rev/min
Voltage: 400 V
Current: 32 A
Year of production: 2015
IP protection: 54

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2. PRESENTATION!
Dear customer, thank you for buying the machine Linolit. We hope
that you will be satisfied with this product. Purchasing any of our
products gives you right to get the right professional help in order to
repair or maintain the machine.
We hope that this manual will be useful. Have the instructions close
by. Following the content (for proper use, service, maintenance, etc.)
you will significantly extend the life of the machine and increase its
second-hand value. If the machine is traded or sold, give the manual
to the new owner.
2.1. RESPONSIBILITY OF THE OWNER: The owner or employer
is responsible for sufficient knowledge of the operator about the
operation and safety measures of the machine. Managers and
operators have to read the instructions and understand the content.
They have to be familiar with:
-safety instructions for working with the machine;
-application and limitations of the machine;
-operating procedures and technical maintenance of the machine.
2.2. RIGHT OF THE MANUFACTURER: After the publication of
this manual our company may include additional information
concerning safety issues. The owner is responsible for safe working
practice. Our company is continuously working on the improvement
of our products and therefore reserves the right to change the form
and the appearance of the machine without the prior notice.
2.3. STRUCTURE AND FUNCTIONS: Linolit products have high
performance characteristics, such as reliability, the use of innovative
technology, advanced technical solutions and environmental
friendliness. Read this manual carefully before using the machine. For
further information, please contact your local dealer or our company.

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3. DESCRIPTION
LINOLIT-550
1. The machine is suitable for grinding and polishing of concrete
surfaces of different hardness.
2. The machine is reliable and easy to operate.
3. The machine can be disassembled for easy transport.
4. Working surface 550 mm.
Body Control panel
Grip
Engine
Grinding head
Protective
cover
Removable cover
Frame
Pair of wheels
Control panel
Stop button
Light, indicating the error of frequency
converter operation
Speed regulator
Start button with lighting
Switch
start/stop/reverse
motion
Dust conduit
Img 1
Hour meter
Power supply socket

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LINOLIT-750
1. The machine is suitable for grinding and polishing of
concrete surfaces of different hardness.
2. The machine is reliable and easy to operate.
3. The machine can be disassembled for easy transport.
4. Working surface 750 mm.
Control panel
Engine
Frame
Grinding head
Grip
Removable cover
Body
Protective
cover
Pair of wheels
Control panel
Stop button Light, indicating the error of frequency
converter operation
Switch start/stop/reverse motion
Start button with lighting
Speed regulator
Hour meter
Dust conduit
Img 2
Power supply
socket

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Img 3
Img 4
LINOLIT-550
LINOLIT-750

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4. PROTECTION
WARNING! Never use a machine with faulty safety
equipment. Carry out the checks, maintenance and service
instructions described in this manual. In case of irregularities,
immediately contact a specialist to make the reparation.
This section describes basic safety rules for using the machine.
Before operating the machine, please read the instructions carefully
and make sure you understand them.
4.1. Start
Warning! Before connecting the machine to the
electrical supply, make sure that both motor cables are
connected to the distribution sockets on the body of the
machine.
Stop
Switch start/stop/reverse motion (start) is used to start and stop the
machine.
Checking the switch
Press on the STOP button and turn the speed
regulator.
Switch
start/stop/reverse
motion
STOP button
Regulator

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Reduce the pressure between the discs and the floor by pulling
down the grip, but without raising the machine from the floor at
startup.
Start the machine by turning the start switch right or left. After
that the machine is running smoothly and increases the engine
speed in 5 sec.
To stop the machine turn the switch in the center position.
4.2. Emergency stop
The emergency stop button is used to immediately stop the
engine operation. The STOP button interrupts the power supply.
Checking the emergency stop:
Reduce the pressure between the discs and the floor by pulling
down the grip. Press on the STOP button. Make sure the
engine is stopped.
Release the STOP button (by turning it clockwise).

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5. OPERATION
5.1. GENERAL SAFETY PRECAUTIONS
WARNING! This section describes basic safety rules for using the
machine. This information is never a substitute for professional skills and
experience. If you get into the situation where you feel unsafe, stop and seek
expert advice. Contact your machine dealer, service agent or an experienced
machine user. Do not attempt any task that you feel unsure of.
Before operating the machine, please read the instructions carefully and
make sure you understand them.
Save the instructions and safety precautions for later use.
5.2. WORKPLACE SAFETY
The workplace should be kept clean and well lighted. In dark and cluttered
areas the risk for accidents is increased. Do not operate the machine in areas
at risk of fire or explosions.
5.3. ELECTRICAL SAFETY
WARNING! When using electrical devices there is a risk of electric shock.
Avoid unfavorable weather conditions and body contact with lightning
conductors and metal objects. Follow the instructions for use in order to
avoid injuries.
- Do not connect the machine to the electrical supply if the socket or cable
is damaged.
- Check that the mains voltage corresponds to the voltage on the rating
plate of the machine.
- Inspection and maintenance must be performed when the engine is
powered down and the plug is removed from the socket.
- Always turn the machine off before unplugging it from the electrical
outlet.
- Do not move the machine while disconnecting it. Disconnect the plug by
pulling the plug, not the cable.
- Do not operate the machine with a damaged power cord or plug. If the
power cord or the plug is damaged, contact your service representative to
change a new one.
- Do not operate the machine where water can reach the equipment. It
can damage the equipment or injure the operator.

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- Always disconnect the power cord when installing or removing the
engine cord from the distribution board.
Instructions for grounding:
WARNING! A poor connection may result in risk of electric shock.
In case of doubt about the reliability of the grounding of the machine,
contact a qualified electrician.
- Do not modify the plug. If the plug does not fit into the socket, contact a
qualified electrician to replace the socket.
- Ensure compliance with local laws and regulations.
- In case of doubt concerning the instructions about grounding,
contact a qualified electrician.
- The machine is provided with a grounded cable and plug and must
always be connected to a grounded socket. This reduces the risk of electric
shock in the event of failure.
- Using the machine, do not use adapters.
Cables and extension cords
- The voltage of the extension cord must agree with the voltage
specified on the nameplate of the machine.
- Use grounded extension cords.
- When operating a power tool outdoors, use an extension cord suitable
for outdoor use. Use of a cord suitable for outdoor use reduces the risk of
electric shock.
- Safe extension cord must be protected from moisture and should not
touch the ground.
- Keep the extension cord away from heat, oily substances, sharp and
moving objects. Damaged or entangled cords increase the risk of electric
shock.
- Make sure that the cables are not damaged and that they are in good
condition. Never use the machine if the cable is damaged, rather put it into
an authorized service workshop for repair.
- Do not use folded extension cord in order to avoid overheating.
- When starting to operate the machine, make sure cord is behind you to
prevent damaging it.
- Use only certified extension cords with sufficient reach.

5.4. PERSONAL SAFETY
WARNING! Prolonged exposure to vibration has negative
effects on the blood vessels and can cause disorders of the
nervous system which is a serious condition for people with
impaired circulation. Contact your doctor if you experience
symptoms of overexposure to vibration. These symptoms
include loss of feeling, tingling, pricking, pain, loss of strength,
changes in skin color or condition. These symptoms normally
appear in the fingers, hands or wrists. These symptoms may be
increased in cold temperatures.
- Use personal protective equipment (see chapter
"Personal protective equipment").
- Never use the machine if you are tired, if you have drunk
alcohol, or if you are taking medication that could affect your
vision, your judgment or your co-ordination.
- Never allow anyone else to use the machine without first
ensuring that they have understood the contents of the
operator's manual.
- Your employer must make sure you have the information you
need or required training to work with the machine safely and
effectively.
- The presence of unauthorized people can decrease attention,
necessary for safe work with the machine. Be extremely
careful. Focus on the operation of the machine. Never allow
children to use or be near the machine.
- Follow safety rules and do not wear loose clothing, long hair,
or jewelry that can get into rotating parts during the machine
operation.
- Do not squeeze and harm your fingers with the
machine open moving parts. Keep distance!
- Do not leave machine running unattended.
- Next to you, there needs to be another person that will help
you in case of an accident.
- Always be in a safe and stable position.
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5.5. PERSONAL PROTECTIVE EQUIPMENT
WARNING! You must use approved personal protective
equipment whenever you use the machine. Personal protective
equipment cannot eliminate the risk of injury but it will reduce the
degree of injury if an accident does happen. Ask your dealer for help
in choosing the right equipment:
Hearing protection
Respirator
Heavy-duty firm grip gloves
Protective glasses or visor
Tight-fitting, heavy-duty and comfortable
clothing that permits full freedom of
movement
Boots with toe-caps and non-slip sole
Before using the machine, read the instructions
manual and make sure you understand the content.
Always have a first aid kit nearby.
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USE AND MAINTENANCE
- Never use the machine for other purposes than what it has been
constructed for.
- Make sure that all parts are in good operating condition and
that connections are properly connected.
- Never use a machine that is faulty. Carry out the checks,
maintenance and service instructions described in this manual.
Some maintenance and service measures must be carried out by
trained and qualified specialists (see chapter "Technical
maintenance").
- Do not modify safety equipment. Check it regularly to be sure it
works properly. The machine must not be used with defective or
damaged protective equipment.
- Never use a machine that has been modified in any way from
its original specification.
- Use only original spare parts. For more information, contact the
dealer.
- Run the machine only when the grinding head is on the ground,
except in case of checking the equipment as described in this
manual.
- Do not run the machine if the edge with the protective cover is
not fixed. For security purposes the connection between the
machine and the floor has to be rigid, especially for dry
grinding.
- When grinding, connect the machine to a vacuum cleaner to
remove dust.
- When replacing removable discs, disconnect the machine from the
mains; push the STOP button and remove the plug from the supply
socket.
- After every operation abrasive tools must be removed.
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- Make sure that the protective cover is clean, not damaged
and fits tightly to the floor.
If the protective cover is damaged, replace it with a new one.
- When you shut the engine off, the bearing disc stops spinning after a
short time. Continue with grinding until the grinding
head stops spinning completely. Before lifting the machine, make sure
the bearing disc stopped spinning.
- When grinding adhesive surfaces, such as asphalt, paints etc., after
completed work slightly lift the front part of the machine to prevent
sticking to the floor because of the heated surfaces. Before lifting the
machine, make sure the bearing disc stopped spinning.
- The temperature of removable discs after the operation can be very
high. Before removing them wait until the machine is cool. Use
protective gloves.
- Do not use the machine on the sand, stairs, walls, roof, and
ceramic tiles.
- Do not use the machine, if it is exposed to precipitations.
- When using the machine, be careful not to hit the power cord.
- Make sure no one is present at a distance of one meter in front of
the machine.
- In case of failure contact the company Polirtlak d.o.o., Štihova ulica
10, 1000 Ljubljana, Slovenia) to repair the machine.
5.6. ADJUSTMENT OF POSITION OF THE GRIP
The position of the grip is steplessly adjustable. In order to
adjust the position of the grip, loosen the screws on the lock.
Set the grip to the desired position and tighten the screws.
LINOLIT-550 LINOLIT-750
Lock
Lock
Grip
Grip
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5.7. CONNECTING THE VACUUM CLEANER
For complete dust collection use vacuum cleaners Linolit. Connect
the vacuum cleaner to the dust conduit (see img 1 and img 2), use
the hose of diameter of 60 mm.
Make sure that the filters in the vacuum cleaner are clean and not
damaged. When working pay attention to the formation of the dust.
5.8. INSTRUCTIONS FOR GRINDING. ABRASIVE TOOLS
Usually abrasive segment consists of two
components:
1. Abrasive material (usually referred as abrasive particles). The
size of abrasive particles affects the size of scratches (deep and
shallow) that remain after grinding.
2. Bond (metal or resin). Using metal as a bond, the final product is
called segment with metal bond or sintered abrasive segment. Using
resin as a bond,the final product is called abrasive tools with resin
bond or polishing disc. Hardness of the bond affects the wear rate
of the abrasive material.
1. Changing the abrasive particles to smaller parts/grains affects
the functioning of abrasive tools as follows:
-less deep scratches
-increased service life of abrasive tools
An opposite effect is achieved, if changing the abrasive particles
to bigger parts/grains.
2. Stiffening bond:
-less deep scratches;
-increased service life of abrasive tools;
-reduced productivity.
An opposite effect is achieved, if mitigating the stiffness of metal
or polymer bond.
Increasing the quantity of abrasive pads under the machine
result in:
-reduced pressure on the individual abrasive pad;
-lower degree of wear;
-reduced load on the machine and lower power
consumption;
-less deep scratches (particularly on the soft floor);
An opposite effect is achieved, if reducing the quantity of tools
under the machine.
Abrasive pads are designed to meet the high performance surface
treatment.
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The lifetime of abrasive tools can be affected by following factors:
-pressure;
-stiffness of the bond;
-size of abrasive grinding grain;
-number of segments under the machine;
-additional abrasive material on the floor (e.g. sand, silicon
carbide) increases wear.
Usually if the abrasive disc wears out faster, the productivity is
higher. Changes in the factors above may affect:
-the distribution of scratches;
-the consumption of electrical current;
-the surface plane (see chapter "CONCRETE
HARDNESS TESTING");
-the ease of operation.
5.9. CONCRETE HARDNESS TESTING
Different types of concrete are characterized by their compressive
strength; different countries use various indicators to evaluate the
compressive strength (e.g. pounds/square inches and MPA).
Generally, if the compressive strength is higher, the concrete is
harder, and it is harder to grind it.
In addition to compressive strength, there are other factors that
affect the hardness of the floor and therefore determine the
selection of abrasive pad. Most often when talking about grinding
and polishing, this refers to the upper layer (5 mm). Concrete
surface treatment and the condition of concrete surface have much
bigger impact on the selection of abrasive segment than the
compressive strength.
Surface characteristics, important for the selection of abrasive
pads.
Usually, if the concrete surface is very smooth (e.g. in the case of
intense polishing/smoothing of the floor), the concrete characteristic
will be high compressive strength, and to process it you will need to
use the segment with a soft bond.
In the opposite case, if the concrete surface is very rough/coarse
(e.g. under the influence of rain, bumps, chopping etc.), the
concrete characteristic will be low compressive strength, and to
process it you will need to use the segment with a hard bond.
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Presence of surface coating/contamination (e.g., epoxy coatings,
ceramic tile adhesives, leveling compounds/smoothers) often have
much bigger impact on the selection of abrasive segment than the
compressive strength.
When grinding concrete tiles for the first time, if you are not sure
about the hardness of concrete, start processing by using abrasive
tools with harder bond. This will ensure minimal wear of abrasive
segments. Even if the hard abrasive segment is not appropriate, all
the damage is in a loss of a small amount of time, without the wear
of abrasive tools.
In the opposite case (e.g. using first abrasive tools with soft bond),
if the concrete is soft and has a rough or coarse surface, there is
high probability of fast wear of a significant number of abrasive
tools.
5.10. SELECTION OF ABRASIVE TOOLS
Method of placing abrasive segments on the machine is
very important; it affects the machine operation,
productivity and final quality of concrete surface. Our
company recommends the following method of placing:
LINOLIT-550
LINOLIT-750
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5.11. REPLACEMENT OF ABRASIVE TOOLS
Turn off the machine, and unplug the power cord of the
machine from the power supply. Keep a pair of gloves handy,
because the pads can be very hot.
Place the machine in a horizontal position.
Put on the gloves. Remove the abrasive pads. Put the new
abrasive segments on the bearing disc. After having installed
new abrasive discs, repeat the procedure in reverse order and
put the machine back on the ground.
When putting the device into horizontal position in order to
replace diamond pads must be present at least two workers.
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6. TRANSPORT AND STORAGE
1. Firmly attach the equipment during transportation in
order to avoid damages and accidents.
2. If possible, cover the machine during transportation in
order to limit the impact of natural disasters, especially rain
and snow.
3. Store the equipment in a locked room, inaccessible to
children and unauthorized persons.
4. If the machine is not in use, store it in a dry place.
TRANSPORT
The machine can be disassembled and reassembled to take
less space when transporting.
- Disconnect the motor cable from the distribution
board;
- Remove the screws;
- Disconnect the grinding head from the support frame.
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