Sharp SW-120NC User manual

SW-120NC
Instruction Manual
Version 3 20180105



Safety rules
Make sure your work area is cleared of uninvited people and obstacles
every time before you start operating the machine.
Never step or stand on the roller table. Your foot may slip or trip on the
rollers and you will fall.
Never wear gloves or loose clothing when operating the machine. It may
lead to serious injury if they are caught in the running machine. Wrap or
cover long hair.

Never touch the running saw blade with gloves or not. It is dangerous if
your hands, clothing or gloves are caught by the running blade.

Make sure any use of fire is prohibited in the shop and install a fire
extinguisher or other fire control device near the machine when cutting
titanium, magnesium, or any other material that produces flammable chips.
Never leave the machine unattended when cutting flammable materials.
Use a water-soluble cutting fluid on this machine. Oil-based cutting fluids
may emit smoke or catch fire, depending on how they are used.

Never cut carbon or any other material that may produce and disperse
explosive dust. It is possible that sparks from motors and other machine
parts will ignite and explode the air-borne dust.

Safety rules

Never adjust the wire brush or remove chips while the saw blade is still
running. It is extremely dangerous if hands or clothing are caught by the
running blade.

Stop the saw blade before you clean the machine. It is dangerous if hands or
clothing are caught by the running blade.

Never start the saw blade unless the workpiece has been clamped firmly. If
the workpiece is not securely clamped, it
will be forced out of the vise
during cutting.
Take preventive measures when cutting thin or short pieces from the work
to keep them from falling. It is dangerous if the cut pieces fall.

Use roller tables at the front and rear sides of the machine when cutting
long work. It is dangerous if the work piece falls off the machine.
Turn off the shop circuit breaker switch before performing maintenance on
the machine. Post a sign indicating the machine is under maintenance.

i
Table of Contents
Section 1 –Safety Information
1-1
Safety Instructions ………………………………………………………………………………………………………
1-1
Safeguard Devices ……………………………………………………………………………………………………….
1-3
Emergency Stop ………………………………………………………………………………………………………….
1-4
Illustration: Emergency Stop ………………………………………………………………………………………
1-5
Safety Labels ……………………………………………………………………………………………………………….
1-6
Illustration: Safety Labels ………………………………………………………………………………………..…
1-9
Hearing Protection ………………………………………………………………………………………………………
1-10
CE Compliance …………………………………………………………………………………………………………….
1-10
Risk Assessment ………………………………………………………………………………………………………….
1-10
Section 2 –General Information
2-1
Specifications ……………………………………..……………………………………………………………………….
2-2
Machine Parts Identification ……………………………………………………………………………………….
2-3
Floor Plan …………………………………………………………………………………………………..……………….
2-5
Section 3 –Moving & Installation
3-1
Location & Environment ………………………………..……………………………………………………………
3-1
Unpacking & Inspecting ……..……………………………………………………………………………………….
3-2
Lifting …………………………………………..………………………………………………………………….………….
3-3
Illustration: Lifting Points …………………………………………………………………….……………….……
3-5
Removing Shipping Bracket …………………………..……………………………………………….……………
3-6
Cleaning …………………………………………..…………………………………………………………….……………
3-6
Installing …………………………...………………………………………………………………………….…………….
3-6
Supplying Hydraulic Oil …………………………………………………………………….…………….
3-6
Supplying Coolant ………..………………………………………………………………….……………..
3-7
Connecting Electric Power ……………………………………………………………….……………..
3-7
Leveling …………………………………………………………………….……………………………………
3-8
Anchoring the Machine …………………………………………………………………….……………
3-9
Installing Roller Table (Optional) ………………………………………………….………………….
3-9
Installing Fire Control Device ………………………………………………….………………………
3-9
Relocating ………………………...…………………………………………………………………….………………….
3-9
Section 4 –Operating Instruction
4-1
Safety Precautions …………………..…………………..……………………………………….…………………….
4-2
Before Operating …………………………..…………………………………………………………………………….
4-3
Control Panel ……..……………………………………..………………………………………….…………………….
4-4
Control Panel ………………….………………………………………………………………………..…….
4-4

ii
Table of Contents
Control Buttons ……………………………………………………………………………………….……..
4-5
Blade Descend Pressure & Speed ………..…………………………………………………….……
4-7
HMI Touch Screen & Functions …………………………………………………………….…………
4-7
Standard Accessories ………….………………………..……………………………………………….……………
4-17
Optional Accessories …….…….………………………..…………………………………………….………………
4-18
Unrolling & Installing the Blade …………………………………………………………………….…………….
4-20
Adjusting Wire Brush ………..……………………………………………………………………….……………….
4-22
Adjusting Saw Arm ………..……………………………………………………………………….…………………..
4-23
Adjusting Coolant Flow ………..………..…………………………………………………………………..…….…
4-23
Adjusting Blade Speed ………..………..………………………………………………………………………….…
4-24
Breaking-In the Blade ………..………..…………………………………………………………………..……….…
4-24
Placing Workpiece Onto Workbed ………..………..…………………………………….…………………….
4-24
Positioning Workpiece for Cutting ………..………..………………………………….…………………….…
4-25
Test-Running the Machine ………..………………..…..………………………………………………………….
4-26
Cutting Operation ………..………..……………………………………………..…………………………………….
4-27
Starting an Automatic Operation ………..………..………………………….…………………………………
4-28
Using Top Clamp for Bundle Cutting ………..……….…………………………………………………………
4-29
Terminating a Cutting Operation ………..………..…………………………………….……………………….
4-30
Section 5 –Electrical System
5-1
Electrical Circuit Diagrams ……….…………………..……………………………………………………………..
5-1
Section 6 –Hydraulic System
6-1
Hydraulic Diagrams ……….…………………..……………………………………………………………….……….
6-1
Section 7 –Bandsaw Cutting: A Practical Guide
7-1
Introduction ……………………….…….…………………..…………………………………………………………….
7-1
Saw Blade Selection ………………….…………………..……………………………………………………………
7-1
Some Sawing Practices …………….…………………..………………………………………….…………………
7-4
Saw Pitch Selection ……………………………………………………………………….………………..
7-4
Material Size and Saw Pitch ………………………………………………….….…………………….
7-4
Section 8 –Maintenance & Service
8-1
Introduction ……………………….…….…………………..…………………………………………………………….
8-1
Basic Maintenance ………………….…………………..…………………………………………….……………….
8-1
Maintenance Schedule …………….…………………..…………………………………………………………….
8-2
Before Beginning a Day’s Work ……………………………………………………………………….
8-2
After Ending a Day’s Work …………………………………………………….………………………..
8-2
Every Week …………………………………………………….………………………………………………
8-2
Every 2 Weeks ……………………………………………….……………………………………………….
8-2

iii
Table of Contents
Every Month ………………………………………………………………………….……………………….
8-3
Every 600 hours/every 1200 hours ………………..…………..………….……………………….
8-3
Every Six Months ……………….………………………………………………….……………………….
8-3
Storage Conditions …………………………....………..……………………………………………………………..
8-3
Terminating the Use of Machine ……..…………..……………………………………………………………..
8-3
Oil Recommendation for Maintenance ……………………………………………………………………….
8-4
Section 9 –Troubleshooting
9-1
Introduction ……………………….…….…………………..…………………………………………………………….
9-1
Precautions ………………….…………………..…………………………………………………………………….....
9-2
General Troubles & Solutions ………………………..…………………………………………………………….
9-2
Minor Troubles & Solutions ………………………..………………………………………………..…………….
9-3
Motor Troubles & Solutions ………………………..…………………………………………………..………….
9-3
Blade Troubles & Solutions ………………………..………………………………………………………………..
9-4
Sawing Problems & Solutions ………………………..……………………………………………………………
9-5
Re-Adjusting the Roller Table ………………………..…………………………………………………………….
9-6
Section 10 –Parts
10-1
Spare Parts Recommendations …………………..……………………………………………………………….
10-1
Part List ……………………………………………………………………………………………………………………….
10-2

1-1
Section 1
SAFETY
INFORMATION
SAFETY INSTRUCTIONS
SAFEGUARD DEVICES
EMERGENCY STOP
SAFETY LABELS
HEARING PROTECTION
CE COMPLIANCE
RISK ASSESSMENT
Safety is a combination of a well-designed machine, 
alertness at all times. This band machine has incorporated many safety measures during the design
process and used protective devices to prevent personal injuries and potential risks. Warning labels
also serve as a reminder to the operator.
Throughout this manual, you will also see various safety-related symbols indicating important
information that you should take note of prior to use of the machine or part of its functions. These
important safety instructions do not cover all possible situations that might occur. It is your
responsibility to take caution and follow procedures stated in this manual when installing,
maintaining and operating your machine.
SAFETY INSTRUCTIONS
What the icons and signs in this user manual mean:
This icon marks WARNING; hazards or unsafe practices that may result in
personal injury or damage to the machine.
Supplementary information to the procedures described in this manual.
Call your local agent or our service center for help.

1-2
This manual has important safety
information. Read through it carefully
before operating this machine to
prevent personal injury or machine
damage. Learn the operation, limitation
and the specific potential hazards
peculiar to this band saw. All users must
read it before performing any activity on
the machine, such as replacing the saw
band or doing regular maintenance.
Do not operate this machine unless it is
completely assembled.
Keep all guards and shields in place
before installing or starting up the
machine.
Keep blade protection cover and wheel
covers in place and in working order.
Make sure the power switch is off before
plugging in power cord.
Disconnect the power cord before
making adjustment, maintenance or
blade changes.
Always remember to switch off the
machine when the work is completed.
Keep unauthorized personnel away.
Use recommended accessories.
Improper accessories may be hazardous.
Never hold the material by hand for
cutting. Always use the vise and make
sure the material is clamped securely
before cutting.
When a workpiece is too long or heavy,
make sure it is supported with a roller
table (recommended).
Do not use the machine to cut explosive
material or high pressure vessels as it
will generate great amount of heat
during the sawing process and may
ignite an explosion.
Wear proper apparel during operation
and when servicing the machine. Some
personal protective equipment is
required for the safe use of the machine,
e.g. protection goggles.
Never operate while under the influence
of drugs, alcohol or medication.
Do not reach over or stand on any part
of the machine.
It is dangerous to operate the machine
when the floor is slippery. Keep the floor
clean and dry. Check for ice, moisture, or
grease before entering.
Keep the work environment safe. Do not
use band saw in a damp or wet location.
Keep your work area clean. Cluttered
and slippery floors invite accidents.
Keep your work area well illuminated at
minimum 500 lumen.
Remove adjusting keys, wrenches or any
loose parts or items from the machine
before turning on power.
Moving parts should be kept in proper
alignment and connection with the
machine. Check for breakage, mounting
and any other conditions that may
affect its operation. Any damaged part
or guard should be properly repaired or
replaced.
Use a sharp saw blade and keep the
machine in its best and safest
performance by following a periodical
maintenance schedule.

1-3
SAFEGUARD DEVICES
The safeguard devices incorporated in this machine include the following two main parts:
1. Protection covers & guards
2. Safety-related switches
Protection Covers & Guards
1. Idle wheel housing cover
2. Drive wheel housing cover
3. Gear reducer cover
4. Wire brush belt cover
5. Blade guard cover (left & right)
6. Safety fence (left & right)(CE model only, as shown in Illustration: Safety Fence)
7. Chip conveyor cover (CE model only)
The protection devices should always be mounted on the machine whenever the machine is running.
Do not remove any of these safeguard devices under any circumstances except when servicing the
machine. Even skilled service technicians should still take cautions when performing repairs or service
on the machine with any of these protectors removed. It is the responsibility of the user to make sure
all these elements are not lost and damaged.
Take note of the following main moving parts on the machine prior to and during machine operation:
Saw bow assembly
Drive and idle wheels
Blade guide arm
Saw blade guide rollers
Quick approach device (optional)
Wire brush
Chip conveyor (optional)
Workpiece clamping vises
Shuttle vises and workbed rollers
Top clamps (optional)
Gear reducer

1-4
Safety Related Switches
To protect the operator, the following safety related switches on the machine are actuated when the
machine is in operation.
Wheel motion detector
This is a proximity sensor used to detect the motion
of the drive wheel. Once the saw blade is broken or
as soon as it starts slipping, the sensor will detect
and stop the drive wheel and the machine.
Power switch
Located on the cover of electrical cabinet, the power
switch controls the main power of the machine. Up
to your companys internal rules, this power switch
can be locked with a padlock or a luggage lock to
protect the operator and the machine.
Emergency stop button
Located on the control panel, the button when
pressed will stop the machine completely.
Vise clamp switch
This switch assures firm clamping of the workpiece. If
the workpiece is not clamped properly, the saw
blade is not allowed to run.
Wheel cover interlock switches
(CE model only)
Located on the two wheel housings, these switches
are used to assure that the machine will stop
whenever the wheel covers are open. This device is
to protect users from being cut by the running saw
blades.
Among all these safety switches, some of them are used to protect the users and some of them are
used to prevent damage to saw blades, the workpiece and the machine itself, etc. We have taken
every precaution to prevent injury or damage and to provide safe and economical operation of the
machine.
EMERGENCY STOP
Designed to be easily accessible, the emergency stop button is located on the left bottom corner on
the control panel and is made in red color and rubber material. For CE models, supplementary
emergency stop button may be available at other area(s) of the machine depending on machine type.
Please refer to Illustration: Emergency Stop.
When you press the button, the machine will immediately come to a full stop to avoid injury or
damage when an accident occurs. The button will be locked when you press it. To unlock it, turn the
button clockwise.
You should press it immediately without any hesitation when observing:
An emergency situation that would cause any injury or damage
An abnormal situation or problem such as fire, smoke, abnormal noise and etc.

1-5
Illustration: Emergency Stop
Emergency
Stop Button

1-6
SAFETY LABELS
Safety-related labels mounted on the machine are categorized into the following four categories.
Please read through and understand them before operating the machine. Refer to Illustration: Safety
Labels.
DANGER Labels
A red and white DANGER labels marks s hazards or unsafe practices that will result in severe personal
injury or death.
Label
Meaning
Label
Meaning
Hazardous Voltage
TURN POWER OFF before
servicing. Failure to
following the warning can
result in severe injury.
DANGER: Running Blade
Blade runs through this area. Keep
your hands away from a running
blade to avoid severe injury. The
arrow indicates direction of the
blade.
WARNING Labels
An orange and black WARNING label marks hazards or unsafe practices that can result in severe
personal injury or damage to the machine.
Label
Meaning
Label
Meaning
Cutting Hazard
KEEP COVER CLOSED while
the blade is running. Turn
power off before opening
cover. Failure to follow the
warning can result in severe
injury.
Cutting Hazard
KEEP HAND OFF while the blade is
running. Turn power off before
opening cover. Failure to follow the
warning can result in severe injury.
Please add antifreeze
coolant when the ambient
temperature is below 0C
(32F).
Loose Hand Hazard
KEEP HAND OFF. Do not touch chip
conveyor. Failure to follow the
warning can result in severe injury.
Impact Hazard
WEAR SAFET SHOES. Do not
approach dropping area
during operation.

1-7
CAUTION Labels
Yellow and black CAUTION labels mark hazards or unsafe practices that can result in
considerable personal injury.
Label
Meaning
Keep hands out of the machine while the blade is running.
Power to machine must be turned off when changing blades or
adjusting wire brush.
NOTICE Labels
Blue and white NOTICE labels mean unsafe practices that could result in damage to products or
property.
Label
Meaning
Replace the hydraulic oil every six months or every 1,200 hours
of operation.
Oil specification: Shell TELLUS 27 or Mobil DTE OIL LIGHT /
HYDRAULIC 28
To extend blade life, always adjust the location of wire brush so
that it is properly touching the blade. Also replace a worn wire
brush with a new one.

1-8
SAFETY INSTRUCTION Labels
Green and white SAFETY INSTRUCTIONS are important reminders that should be read before
operating the machine.
Label
Meaning
1. Read and understand the instruction manual and warning
signs before operating machine. Failure to follow these
instructions and warnings can result in serious injury or
death.
2. Do not wear gloves, neckties, jewelry or loose clothing
while operating the machine.
3. Always wear eye protection goggles.
4. Check blade tension and adjust blade guide before starting
to cut.
5. Always clamp stock firmly in place before cutting.
6. Do not remove jammed or cut-off pieces until blade has
stopped.
7. Keep fingers out of path of blade.
8. Blade guards should be in place and used at all times.
9. Disconnect machine from power source before marking
repairs or adjustments.
10. Do not operate while under the influence of drugs, alcohol
or medication.

1-9
Illustration: Safety Labels
SW-120NC

1-10
HEARING PROTECTION
Always use ear protection!
When your machine is running, noise generated by the machine may come from the following:
Saw blade during cutting or material feed mechanism
Wire brush unit
Chip conveyor unit
Speed reducer
Hydraulic motor/pump
Belt transmissions variable speed motors
Blade motor
Coolant pump
Drive wheel
Parts not assembled tightly causing mechanical vibration
Our products pass noise testing less than 78 dBA. Noise level vary according to working conditions
and we recommend ear plugs or other hearing protection at all time. If your machine produces an
undesirable noise while it is running, you should:
1. Make sure all maintenance tasks have been performed following the prescribed maintenance
schedule (Refer to Section 8).
2. If maintenance does not seem to solve the problem, follow the troubleshooting procedures
under Section 9.
CE COMPLIANCE
Our CE model is designed to satisfy regulations of the Council Directive on the approximation of the
laws of the Member States relating to machinery (2006/42/EC) - Annex I Essential health and safety
requirements relating to the design and construction of machinery.
RISK ASSESSMENT
Risk assessment generally takes account of intended use and foreseeable misuse, including process
control and maintenance requirements. We made every effort to avoid any personal injury or
equipment damage during the machine design stage. However, the operator (or other people) still
needs to take precautions when handling any part of the machine that is unfamiliar and anywhere on
the machine that has potential hazards (e.g. the electrical control box).

2-1
Section 2
GENERAL
INFORMATION
SPECIFICATION
MACHINE PARTS IDENTIFICATION
FLOOR PLAN
This band saw machine is designed by our R&D engineers to provide you the following features and
advantages:
Safety
This machine is designed to fully protect the operator from its moving parts during cutting
operation.
The machine and each compoment has passed strict testing (Council Directive on the
approximation of the laws of the Member States relating to Machinery).
The machine will shut off automatically when the saw blade is broken, protecting both the
operator and the machine.
Convenience & High-Performance
The machine is designed in the way that the operation and adjustment can be easily
performed.
The machine will stop automatically when out of stock.
Dual valve system is designed to achieve optimal cutting performance with the simple
setting of feed rate and perspective cutting pressure for different material.
Durability
The intended life-span of the machine is counted based on regular daily operation. It is
calculated with the life expectancy of 10 years under normal operating condition and exact
attention to the maintenance schedule.
8 hours × 5 days × 52 weeks × 10 years ＝20,800 hours

2-2
SPECIFICATION
Model
SW-120NC
Capacity
Round
11.81“(300 mm)
Square
11.81“(300 mm)
Rectangular (H x W)
11.81” x 13.4”(300 x 340 mm)
Bundle Cutting
W: 7.48” ~ 11.81”(190 ~ 300 mm)
H: 2.75” ~ 5.51”(70 ~ 140 mm)
Saw Blade
Speed
66 ~ 330 fpm (20 ~ 100 m/min)
Size
150.4” x 1.3” x 0.042”(3,820 x 34 x 1.1 mm)
Tension
Hydraulic
Guide
Interchangeable tungsten carbide
Cleaning
Steel wire brush with flexible drive shaft driven by main motor
Motor
Output
Saw Blade
5 HP (3.75 kW)
Hydraulic
1 HP (0.75 kW)
Coolant Pump
1/8 HP (0.1 kW)
Tank
Capacity
Hydraulic
6.6 gal (25 L)
Coolant
11.9 gal (45 L)
Feeding
Length
Mode
Hydraulic, NC Automatic
Single Stroke
15.86”(403 mm)
Workbed Height
26”(660 mm)
Weight
Net
3,528 lb (1,600 kg)
Gross
3,970 lb (1,800 kg)
Floor Space (L x W x H)
85” x 81.7” x 74.8”(2,160 x 2,075 x 1,900 mm)