Markusson Grindomatic V12 User guide

Original Instruction Manual
Grindomatic
www.markusson.se

Grindomatic
2 Grindomatic 201708 EN
Table of Contents
1 Introduction . . . . . . . . . . . . . 3
1.1 Important user information . . . . . . .3
1.2 About this manual . . . . . . . . . . . .3
1.3 Intended use . . . . . . . . . . . . . .3
1.4 Regulatory information . . . . . . . . .3
1.5 Nameplate. . . . . . . . . . . . . . . .4
1.6 Recycling information . . . . . . . . . .4
2 Safety . . . . . . . . . . . . . . . . 5
2.1 Safety notices . . . . . . . . . . . . . .5
2.2 Safety instructions. . . . . . . . . . . .5
2.3 Signs and symbols . . . . . . . . . . .6
3 Product Description . . . . . . . . . 7
3.1 Product overview . . . . . . . . . . . .7
3.2 Front view . . . . . . . . . . . . . . . .7
3.3 Back view . . . . . . . . . . . . . . . .8
3.4 Grinding head . . . . . . . . . . . . .9
3.5 Controls . . . . . . . . . . . . . . . . 10
3.5.1 Grinding speed knob . . . . .11
3.6 Chain overview . . . . . . . . . . . . 11
3.7 Technical data. . . . . . . . . . . . .12
4 Installation . . . . . . . . . . . . . 13
4.1 Safety during installation . . . . . . . 13
4.2 Site requirements . . . . . . . . . . . 13
4.3 Unpacking the machine . . . . . . . .13
4.4 Bench-mounting the machine . . . . .14
4.5 Installing the grinding wheel. . . . . .14
4.6 Test the machine before first use . . . 16
5 Operation . . . . . . . . . . . . . 17
5.1 Safety during operation . . . . . . . . 17
5.2 Preparing for operation . . . . . . . . 17
5.2.1 Preparing the grinding wheel . 17
5.2.2 Setting the head-tilt angle. . .18
5.2.3 Setting the top-plate angle . .18
5.2.4 Inserting the chain . . . . . . 19
5.2.5 Making the grinding settings . 20
5.3 Operating the machine . . . . . . . . 23
5.4 Depth gauge grinding . . . . . . . . . 24
© 2017 Markusson Professional Grinders AB - All rights reserved.
6 Maintenance and Service . . . . . 26
6.1 Safety during maintenance . . . . . . 26
6.2 Frequency of maintenance . . . . . . 26
6.3 Changing the grinding wheel and fitting
the grinding wheel guard . . . . . . . 27
6.4 Fastening the chain vise . . . . . . . 28
6.5 Checking and adjusting the wire . . . 28
6.6 Service . . . . . . . . . . . . . . . . 29
7 Troubleshooting . . . . . . . . . . 30
7.1 Troubleshooting procedure . . . . . . 30
7.2 Sharpening test . . . . . . . . . . . . 30
7.3 Issues . . . . . . . . . . . . . . . . . 31
8 Accessories and Spare Parts . . . 32
8.1 Ordering information . . . . . . . . . 32
8.2 List of accessories. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . 32
8.3 Spare parts . . . . . . . . . . . . . . 33
8.4 Converter . . . . . . . . . . . . . . .35
8.5 Stand . . . . . . . . . . . . . . . . . 35
8.6 Pneumatic chain tensioner . . . . . . 36
9 Assembling the stand . . . . . . . 37
9.1 Assembling the pneumatic chain
tensioner . . . . . . . . . . . . . . . 38
9.2 Using the chain tensioner . . . . . . .41
10 Declaration of conformity . . . . . 43

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Grindomatic 201708 EN 3
Introduction
1 Introduction
1.1 Important user information
WARNING Before you install, operate or do maintenance on the machine, you must read the safety information
in this manual. Obey the instructions in this manual to prevent injuries or damage to the equipment.
1.2 About this manual
This user manual describes how to safely install, operate, and perform basic maintenance on the Grindomatic
Auto Chain Grinder chain sharpening machine. This manual also describes the parts of the machine, and it shows
different accessories and spare parts that are available.
1.3 Intended use
The machine must only be used to sharpen the cutting chains used on power saws, forestry machines and
harvesters. It automatically sharpens the cutting teeth, and depth gauges on 3/8”, 3/8” low profile, .325”, and .404”
pitch chains. The machine is designed for indoor use only.
Unintended use
The machine must not be used outdoors or in a manner that is not described in this manual.
1.4 Regulatory information
Regulations are given below. A copy of the EC Declaration of conformity is supplied with the machine.
WARNING Before you install, operate or do maintenance on the machine, you must read the safety information
in this manual. Obey the instructions in this manual to prevent injuries or damage to the equipment.
Directive/standard Description
98/37 EC The Machine Directive (MD)
73/23 EEC as amended 73/23 EEC as amended The Low-Voltage Directive (LVD)
89-336/EEC as amended The Electro Magnetic Compatibility Directive (EMC)
EN-ISO 12100-1, 2 Safety of machinery - Basic components, general principles for design
EN 61000-6-3 Emission standard for residential, commercial and light-industrial
environments
EN 55014-1, 2 Electromagnetic compatibility - Requirements for household
appliances, electric tools and similar apparatus - Part 1: Emission

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Introduction
1.5 Nameplate
This nameplate is placed on the Grindomatic Auto Chain Grinder’s grinding head.
1
1.6 Recycling information
This symbol shows that electrical and electronic equipment must not be disposed of as unsorted municipal waste. It
must be collected separately. Recycle according to current local rules and regulations.

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Safety
2 Safety
2.1 Safety notices
This section contains safety information for the Grindomatic Auto Chain Grinder. This manual contains WARNINGS,
CAUTIONS, and IMPORTANT notes that are applicable for the safe operation of the machine.
WARNING A warning tells you about conditions that can cause injury or death, if you do not obey the
instructions. Do not continue until all conditions are accepted and engaged.
CAUTION A caution tells you about conditions that can cause damage to equipment, if you do not obey the
instructions. Do not continue until all conditions are accepted and engaged.
IMPORTANT Important or noteworthy information that enables trouble-free and optimal use of the machine.
2.2 Safety instructions
WARNING Before you install, operate or do maintenance on the machine, you must read the safety information
in this manual. Obey the instructions in this manual to prevent injuries or damage to the equipment.
WARNING Put the machine indoors, in a dry area with good light. Do not let the machine become wet or moist.
Do not put the machine near gas, liquids or other materials that can catch fire or explode.
WARNING Do not operate machines in explosive atmospheres, such as in the presence of flammable liquids,
gases or dust. Machines create sparks which may ignite the dust or fumes.
WARNING The user must only do maintenance that is described in this manual on the machine. Only approved
and trained service technicians can do service on the machine.
WARNING Make sure that the power is turned off before you install, operate or perform maintenance on the
machine.
WARNING To prevent mistakes when chains are sharpened, it is very important to understand how the grinding
machine works. Read the instructions carefully before the machine is used.
WARNING Always wear safety gloves, protective glasses, ear protection, and any other personal protective
equipment suitable for the current work task.
WARNING Stop the machine immediately if it does not work correctly!
WARNING Before a chain is sharpened, make sure that the the grinding disc is not cracked, does not vibrate
or wobble. If the grinding disc is damaged it must be replaced immediately, see chapter 6.3. “Change the grinding
disc and fit the grinding disc guard”. If abnormal vibrations occur during operation, immediately stop the machine and
check the condition of the grinding disc.
WARNING Put the power converter where there is as little dust as possible and out of reach of sparks from the
machine.
WARNING Attach air hoses and cables with cable clamps, to make sure no one trips over them.
CAUTION The machine must always be attached to the stand or bench. Make sure that it is safely attached.
CAUTION Only use accessories that are supplied or approved by the manufacturer.
CAUTION If the pitch is not correctly set the chain will be pushed into an incorrect sharpening position. This
may result in a damaged chain.
CAUTION If the metal of a cutting link turns blue during grinding, the speed is set too high and the metal is
overheated. This can cause the metal in the cutting tooth to lose its properties. Replace the damaged cutting link or
sharpen the chain again.
CAUTION Clean the machine daily. To prevent that it breaks, remove grinding dust every day. Use a vacuum
cleaner, brush or similar to clean the machine.
CAUTION Make sure that the floor where the machine is placed is flat and level. If it is not, attach the stand to
the floor with screws.

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Safety
2.3 Signs and symbols
See the table below for information about the signs and symbols on The Grindomatic Auto Chain Grinder:
Sign/Symbol Description
Always wear protective glasses and ear protection when using the machine.
Always wear protective gloves when using the machine.
Warning! A warning tells you about conditions that can cause injury or death, if you do not obey the
instructions. Do not continue until all conditions are accepted and engaged.
Before you install, operate or do maintenance on the machine, you must read the safety information
in the User manual. Obey the instructions to prevent injuries or damage to the equipment.
Risk for cutting injuries. Keep fingers away from the area when the machine is on.
Risk for pinching injuries. Keep fingers away from the area when the machine is on.

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Product Description
3 Product Description
3.1 Product overview
The Grindomatic Auto Chain Grinder is a machine that sharpens chains. The machine can sharpen chains (3/8”, 3/8”
Low Profile, .325”, and .404” pitch) for power saws, forestry machines, and harvesters.
3.2 Front view
A
B
C
D
E
F
G
HIJK
Pos Part Description
AGrinding head Holds the grinding wheel in its correct position.
BControl panel The controls starts and stops the different functions of the machine.
See section 3.6, “Controls” for further information.
CGrinding wheel The wheel that sharpens the chain.
DGrinding wheel centering knob Centers the grinding wheel above the chain.
EGrinding depth knob Sets the grinding depth for the gullets
FChain pusher adjustment knob Sets the grinding length.
GPower supply cable Supplies electricity to the machine.
HChain pusher Advances the chain through the vise.
IChain vise Positions the chain as it moves in the machine.
JLeft-right alignment screw Sets the right and left cutters to equal length.
KTop-plate angle screw Sets the top-plate angle, 0-35°. Default 30°.

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Product Description
3.3 Back view
F
B
C
D
E
A
G
Pos Part Description
APitch adjustment wing Adjusts the pitch.
BGrinding head cover and grinding
wheel guard
Protects the grinding head and grinding wheel; it also protects the
user from sparks during grinding.
CTop-plate angle scale Shows the top-plate angle on a scale from 0-35°. Default: 30°. It is
set using the top-plate angle screw (O in Front view illustration).
DHead-tilt angle scale Shows the head-tilt angle on a scale from 50-90°.
Default: 60°.
EWire Controls the vertical movement of the grinding head.
FWire adjustment knobs Adjusts the wire that controls the vertical movement of the grinding
head.
GHead-tilt angle nut Sets the head-tilt angle on the head-tilt angle scale. (D)

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Product Description
3.4 Grinding head
The grinding wheel on the grinding head sharpens the chains. The type of wheel, the top-plate angles, the settings of
the grinding head, and the profiling of the grinding wheel all determine how the chain is sharpened.
D
C
B
A
Pos Part Description
AGrinding wheel Grinds the chain.
BGrinding wheel nut Keeps the grinding wheel in place.
CGrinding wheel guard Protects the user and grinding wheel when the chain is sharpened.
D2 screws Secures the grinding wheel guard in place.

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Product Description
3.5 Controls
A
B
C
D
E
F
Pos Part Description
AChain pusher switch ON: starts the chain feed, so that the chain moves in a forward
direction. OFF: Stops the chain feed.
BGrinding speed knob
Sets the grinding speed.
Low speed: Grinds the chain at low speed in a pulsing motion to
avoid that the chain gets burned.
High speed: grinds the chain at a high speed without the pulsing
motion.
CEmergency stop button
Shuts off the power and stops the machine. The emergency stop
button is used to turn off the machine after operation and to do an
emergency shut-down.
DGrinding wheel motor switch Starts the grinding motor.
EGrinding head positioning button Changes the angle of the grinding head from left to right, or vice
versa.
FPower button Turns on the machine.

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Product Description
3.5.1 Grinding speed knob
The grinding speed knob sets the speed of the grinding wheel. The speed can be set to different speeds to grind 0
mm to 4 mm of the cutting teeth. At low speed, grinding is done in a pulsing motion.
3.6 Chain overview
This section describes the definitions for the parts of a normal chain.
Pos Part Description
ACutters R: Right cutter. L: Left cutter.
BDrive link The lower part of a link. Used to push the chain forward in the
chainsaw, etc.
CTie strap The links separating the cutters.
DCutting tooth The part of the cutter that cuts chain.
EGullet The space between the cutting tooth and the depth gauge.
FRivet hole A hole where the rivet is placed.
GDepth gauge The front part of the cutter.
BC
F
DG
E
A
R L
A

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Product Description
3.7 Technical data
Parameter Value
Supply voltage 12-15 V DC
Power 144 W
Current 12 A
Over-current protection Automatic fuse type ptc
Rotation speed 3250 rpm
Peripheral speed 25 m/s
Grinding wheel dimensions
(for the grinding wheels included in the
delivery)
Outer diameter (OD) × Width (W) × Inner diameter (ID):
• 150mm x 3.2mm x 16mm (5 7/8”x 1/8”x 5/8”)
• 150mm x 4.8mm x 16mm (5 7/8”x 3/16”x 5/8”)
• 150mm x 6.4mm x 16mm (5 7/8”x 1/4”x 5/8”)
Max dimensions for the
Grindomatic Auto Chain Grinder
Length (L) x Width (W) x Height (H):
400mm x 350mm x 350mm (15.7”x 13.8”x 13.8”)
Weight of the machine 11.5kg
Compressed air supply pressure 5-8 bar

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Installation
4 Installation
4.1 Safety during installation
WARNING Before you install, operate or do maintenance on the machine, you must read the safety information
in this manual. Obey the instructions in this manual to prevent injuries or damage to the equipment.
WARNING Always wear safety gloves, protective glasses, and any other personal protective equipment
suitable for the current work task.
4.2 Site requirements
WARNING Put the machine indoors, in a dry area with good light. Do not let the machine become wet or moist.
Do not put the machine near gas, liquids or other materials that can catch fire or explode.
CAUTION Make sure that the floor where the machine is placed, is flat and level. If it is not, attach the stand to
the floor with screws.
Note: Machines can be set up on a bench or you can use the optional stand. Please note that mounting hardware for
the bench is not supplied with the machine.
4.3 Unpacking the machine
Note: For a video demonstration of how to unpack, assemble, install, and operate the machine, visit markusson.se.
1. Unpack the crates.
Note: Keep the delivery crates and packing materials. Pack the machine in them if it is moved or sent for service.
The crates and packing materials will minimize the risk of damage during transportation.
2. Make sure that all parts in the list below are included in the delivery:
• Grindomatic Auto Chain Grinder machine
• Grindomatic Auto Chain Grinder User manual (this document)
• rectangular profile stone (55 x 15 x 15 mm) and profile template
• hex key, which is used to change the top-plate angle
• Allen wrench, which is used for tightening
• grinding wheel guard (with 2 screws for assembly)
• 2 types of ceramic grinding wheels
• stop clamp
• battery cable (black and red power cable with battery clamps)
Note: For your convenience, you may also use your own tools to assist the machine’s assembly.
3. Remove all packing materials. Remove the metal plate from the chain vise, which is used to protect the grinding
head during transport. Remove the air hose connector’s packing material.

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Installation
4.4 Bench-mounting the machine
1. Always mount the grinder securely, either to
a bench or to the optional stand (see chapter
8.4).
2. Bench-mounting offers you flexibility and the
ability to sharpen chain virtually anywhere using
the electrical from any wall outlet or use of a
12V power source.
3. To connect the battery cable (to 12V battery) or
AC/DC converter unit (optional) to the machine,
plug in the black and red power cable into the
control panel through the slot on the left hand
side of the machine.
WARNING Put the power converter where
there is as little dust as possible and out of
reach of sparks from the machine.
4. If the machines are not being used with the
optional stand and the pneumatic tensioner, it
can be used with the weight tensioner in order
to provide the chain with the tension needed
for grinding.
Note: The chain weight is an optional accessory.
2 mm
4.5 Installing the grinding wheel
Note: The first step in preparing the grinder for use
is installing and centering the appropriate grinding
wheel.
1. The grinder comes with two wheel
sizes: 6.4mm, 4.0mm. The wheels are
150mm in diameter with 16mm arbor
size. It is critical to select the wheel of the
appropriate thickness for each chain.
2. The correct wheel size for a particular
Markusson saw chain can be found in
several sources: this manual, the back
of the Markusson chain packaging,
Markusson Maintenance and Safety
Manual, or online at Markusson.se.
WARNING Inspect the grinding wheel and
make sure that it is not cracked or damaged.
There is a simple test (called the “ring test”) that
you can do to check for damage to a grinding
wheel. Hold the grinding wheel up by its center
hole. Knock the edge of the grinding wheel
gently with a non-metallic object (like the plastic
handle of a screwdriver). If the grinding wheel
makes a dull, non-metallic noise, then the wheel
could be damaged. DO NOT USE IT. CRACKED
GRINDING WHEELS MUST BE REPLACED
IMMEDIATELY. See also,6.3, “Changing the
grinding wheel and fitting the grinding wheel
guard”.

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Installation
6. Next, insert the appropriate wheel onto the hub
and, using moderate pressure with your hands,
secure the wheel attachment nut to hold the
wheel in place.
WARNING Over-tightening the wheel can
cause it to break.
7. Finally, reposition the shield and secure it in
place with the retaining screw.
WARNING Never start the grinder without
the wheel guards in place.
8. Before using the grinder, you’ll need to check to
ensure the wheel is properly installed.
9. With the power off, gently spin the grinding
wheel and check for wheel wobble.
10. Conduct a final check for proper assembly by
turning on the main power and switching on the
wheel power switch while standing to the side.
Look for vibrations due to wheel oscillation or
other interference.
WARNING Always keep bystanders at a
safe distance from a grinder while in operation.
Note: To get the best performance from your
grinder, ensure the grinding wheel is centered
over the vise. Refer to this user manual or the
provided video for specific instructions.
3. Once the grinding wheel has been verified,
you’re ready to begin the install.
4. Start by removing the grinding wheel shield (C)
to access the wheel attachment nut (B). Use
the provided Allen wrench to loosen the
retaining screw (D).
5. Remove the wheel attachment nut from the
hub.
B
C
A
D

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Installation
4.6 Test the machine before first use
1. Make sure that all packing materials are
removed.
2. Make sure that the wires and when used with a
stand, air hoses are correctly connected.
3. Make sure that the machine is securely
mounted.
4. Make sure that the machine is on a level
surface.
5. Perform a sharpening test on the machine to
ensure it functions correctly. See section 7.2,
“Sharpening test”

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Operation
5 Operation
5.1 Safety during operation
WARNING Before you install, operate or
do maintenance on the machine, you must read
the safety information in this manual. Obey the
instructions in this manual to prevent injuries or
damage to the equipment.
WARNING Always wear safety gloves,
protective glasses, ear protection, and any other
personal protective equipment suitable for the
current work task.
WARNING To prevent mistakes when chains
are sharpened, it is very important to understand
how the grinding machine works. Read the
instructions carefully before the machine is used.
5.2 Preparing for operation
Note: For a video demonstration of how to install
and operate the machine, go to Markusson.se.
5.2.1 Preparing the grinding wheel
WARNING Before a chain is sharpened, make
sure that the grinding wheel is not cracked, does not
vibrate or wobble. Perform a “ring test”; see section
4.5, “Installing the grinding wheel”. If the grinding
wheel is damaged, it must be replaced immediately;
see section 6.3, “Changing the grinding wheel and
fitting the grinding wheel guard”.
If abnormal vibrations occur during operation,
immediately stop the machine and check the
condition of the grinding wheel. Make sure all the
switches are turned off before turning the power
back on.
Note: Before each chain is sharpened, make sure
the grinding wheel edges match the shape of the
chain type.
The condition, type and profile of the grinding wheel
is essential for the machine’s accurate operation.
The instructions that follow contain information on
how to make sure that the grinding wheel is in good
condition and has the correct profile.
1. Press the power button to turn on the machine.
2. Set the grinding wheel switch to ON.
3. Make sure that the grinding wheel does not
vibrate or wobble. If the grinding wheel is
damaged, it must be replaced immediately; see
section 6.3, “Changing the grinding wheel and
fitting the grinding wheel guard”
4. Make sure the grinding wheel edges match the
shape of the chain type.
• For ceramic grinding wheels: Use the profile
stone (included in delivery) to shape the
edges on the grinding wheel. Use a
light-sweeping action to shape the edges of
the wheel. Use the provided template to verify
proper radius shape for the specific grinding
wheel being used
.

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Operation
5. Set the grinding wheel switch to OFF.
6. Use the profile template to verify that the
grinding wheel has the same profile as the type
of chain to be sharpened.
7. Repeat steps 4-7 until the grinding wheel profile
is the same as the selected profile on the
profile template.
5.2.2 Setting the head-tilt angle
Note: Read the specifications from the chain
manufacturer to find out the recommended head-tilt
angle for your chain.
1. Loosen the head-tilt angle knob located on the
back of the machine.
2. Turn the grinding head to set the desired head-tilt
angle (50-90°) on the head-tilt angle scale. The
default head-tilt angle is 60°.
3. Tighten the head-tilt angle knob.
5.2.3 Setting the top-plate angle
Note: Read the specifications from the chain
manufacturer to find out the recommended top-plate
angle for your chain.
1. Use the hex key (provided with the machine) to
loosen the top-plate angle screw up to three
turns.
2. Turn the grinding head to set the desired
top-plate angle (0-35°) on the top-plate angle
scale. The default top-plate angle is 30°.
3. Tighten the top-plate angle screw.
70°
80°
90°
60°
50°

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Operation
4. Press the grinding head positioning button to
move the grinding head in both directions and
make sure that the top-plate angles are the
same.
5. If the top-plate angles are not the same (for
example 26° in the right direction and 30° in
the left direction), adjust the nuts (A) a 1/2-turn
at the time.
6. Repeat steps 2-5 until the top-plate angles are
the same in both directions.
5.2.4 Inserting the chain
1. Check the chain for double-links (2 left cutters
or 2 right cutters) or joint-links, and make sure
that the chain is not damaged.Mark double-
links or joint-links to make it easier to see them
when the chain is sharpened.
2. Attach the stop clamp on a tie-strap between a
double-link or a joint-link.
A
3. Place the chain, with the cutter to the left of the
depth gauge, into the groove on the chain vise.
4. Attach the chain weight to the chain
5. Pull the chain around by hand to make sure
that it runs freely in the chain vise.
CAUTION Always wear safety gloves,
protective glasses, and any other personal
protective equipment suitable for the current
work task.

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Operation
5.2.5 Making the grinding settings
1. Press the power button to turn on the machine.
2. Press the grinding head positioning button to
move the grinding head so that it is tilted in the
correct start position for the next cutting link to
be ground.
3. Lift the grinding head to its uppermost position.
4. Read the specifications from the chain
manufacturer to find the pitch for the chain that
is to be sharpened. If you don’t know the
correct pitch, calculate it by measuring the
distance in inches between 3 rivets, and divide
it by 2.
X
X÷2=
5. Loosen the chain pitch wing-nut and move it to
the correct pitch position. Tighten it again.
Note: Adjusting the pitch is not the same thing
as adjusting the cutting tooth length (see
number 13 below).
6. Set the chain pusher switch to ON. The chain
pusher arm now advances the chain forward.
7. Visually make sure that the chain pusher stops
its movement exactly above the rivet behind the
cutting link, as illustrated in the image below.
8. Set the chain pusher switch to OFF, when the
grinding head is in its uppermost position and
the chain lock is not engaged.