Brother SL-1110, S-7550A Instruction Manual
INSTRUCTION MANUAL
SL-1110
S-7550A
HIGH SPEED SINGLE NEEDLE STRAIGHT LOCK STITCHER
Please read this manual before using the machine.
Please keep this manual within easy reach for quick reference.
Thank you very much for buying a BROTHER sewing machine. Before using your new machine,
please read the safety instructions and the explanations given in the instruction manual.
With industrial sewing machines, it is normal to carry out work while positioned directly in front of
moving parts such as the needle and thread take-up, and consequently there is always a danger of
injury that can be caused by these parts. Follow the instructions from training personnel and
instructors regarding safe and correct operation before operating the machine so that you will know
how to use it correctly.
SL-1110
SAFETY INSTRUCTIONS
[1] Safety indications and their meanings
This instruction manual and the indications and symbols that are used on the machine itself are provided in order to ensure
safe operation of this machine and to prevent accidents and injury to yourself or other people.
The meanings of these indications and symbols are given below.
Indications
The instructions which follow this term indicate situations where failure to follow the
CAUTION
Symbols
· · · · ·
This symbol ( ) indicates something that you should be careful of. The picture inside the triangle
indicates the nature of the caution that must be taken.
(For example, the symbol at left means “beware of injury”.)
instructions could cause injury when using the machine or physical damage to
equipment and surroundings.
· · · · ·
· · · · ·
This symbol ( ) indicates something that you must not do.
This symbol ( ) indicates something that you must do. The picture inside the circle indicates the
nature of the thing that must be done.
(For example, the symbol at left means “you must make the ground connection”.)
ENGLISH
SL-1110
i
[2] Notes on safety
CAUTION
Environmental requirements
Use the sewing machine in an area which is free
from sources of strong electrical noise such as
electrical line noise or static electric noise.
Sources of strong electrical noise may cause
problems with correct operation.
Any fluctuations in the power supply voltage
should be within ±10% of the rated voltage for the
machine.
Voltage fluctuations which are greater than this
may cause problems with correct operation.
The power supply capacity should be greater than
the requirements for the sewing machine's power
consumption.
Insufficient power supply capacity may cause
problems with correct operation.
Machine installation should only be carried out by
a qualified technician.
Contact your Brother dealer or a qualified
electrician for any electrical work that may need to
be done.
The sewing machine weighs approximately 30 kg.
The installation should be carried out by two or
more people.
Do not connent the power cord until installation is
complete. The machine may operate if the treadle
is depressed by mistake, which could result in
injury.
Be sure to connect the ground. If the ground
connection is not secure, you run a high risk of
receiving a serious electric shock, and problems
with correct operation may also occur.
Secure the table so that it will not move when
tilting back the machine head. If the table moves, it
may crush your feet or cause other injuries.
The ambient temperature should be within the
range of 5°C to 35°C during use.
Temperatures which are lower or higher than this
may cause problems with correct operation.
The relative humidity should be within the range of
45% to 85% during use, and no dew formation
should occur in any devices.
Excessively dry or humid environments and dew
formation may cause problems with correct
operation.
In the event of an electrical storm, turn off the power
and disconnect the power cord from the wall outlet.
Lightning may cause problems with correct
operation.
Installation
All cords should be secured at least 25 mm away
from any moving parts. Furthermore, do not
excessively bend the cords or secure them too
firmly with staples, otherwise there is the danger
that fire or electric shocks could occur.
Install the beltcovers to the machine head and
motor.
If using a work table which has casters, the casters
should be secured in such a way so that they
cannot move.
Be sure to wear protective goggles and gloves
when handling the lubricating oil, so that it does not
get into your eyes or onto your skin.
If care is not taken, inflammation can result.
Furthermore, do not drink the lubricating oil.
Diarrhea or vomiting may result.
Keep the oil out of the reach of children.
ii
SL-1110
CAUTION
Sewing
This sewing machine should only be used by
operators who have received the necessary training
in safe use beforehand.
The sewing machine should not be used for any
applications other than sewing.
Be sure to wear protective goggles when using the
machine.
If goggles are not worn, there is the danger that if a
needle breaks, parts of the broken needle may
enter your eyes and injury may result.
Turn off the power switch at the following times.
The motor will keep turning even after the power is
switched off as a result of the motor’s inertia. Wait
until the motor stops fully before starting work.
The machine may operate if the treadle is
depressed by mistake, which could result in injury.
When threading the needle
When replacing the bobbin and needle
When not using the machine and when leaving
the machine unattended
If using a work table which has casters, the casters
should be secured in such a way so that they
cannot move.
Attach all safety devices before using the sewing
machine. If the machine is used without these
devices attached, injury may result.
Do not touch any of the moving parts or press any
objects against the machine while sewing, as this
may result in personal injury or damage to the
machine.
If an error occurs in machine, or if abnormal noises
or smells are noticed, immediately turn off the
power switch. Then contact your nearest Brother
dealer or a qualified technician.
If the machine develops a problem, contact your
nearest Brother dealer or a qualified technician.
Cleaning
Turn off the power switch before carrying out
cleaning.
The motor will keep turning even after the power is
switched off as a result of the motor’s inertia. Wait
until the motor stops fully before starting work.
The machine may operate if the treadle is
depressed by mistake, which could result in injury.
Maintenance and inspection
Maintenance and inspection of the sewing machine
should only be carried out by a qualified technician.
Ask your Brother dealer or a qualified electrician to
carry out any maintenance and inspection of the
electrical system.
Turn off the power switch and disconnect the power
cord from the wall outlet at the following times.
The motor will keep turning even after the power is
switched off as a result of the motor’s inertia. Wait
until the motor stops fully before starting work.
The machine may operate if the treadle is
depressed by mistake, which could result in injury.
When carrying out inspection, adjustment and
maintenance
When replacing consumable parts such as the
rotary hook
Be sure to wear protective goggles and gloves
when handling the lubricating oil, so that it does not
get into your eyes or onto your skin.
If care is not taken, inflammation can result.
Furthermore, do not drink the lubricating oil.
Diarrhea or vomiting may result.
Keep the oil out of the reach of children.
Use only the proper replacement parts as specified
by Brother.
If the power switch needs to be left on when
carrying out some adjustment, be extremely careful
to observe all safety precautions.
Secure the table so that it will not move when tilting
back the machine head. If the table moves, it may
crush your feet or cause other injuries.
Use only the proper replacement parts as specified
by Brother.
If any safety devices have been removed, be
absolutely sure to re-install them to their original
positions and check that they operate correctly
before using the machine.
Any problems in machine operation which result
from unauthorized modifications to the machine will
not be covered by the warranty.
SL-1110
iii
[3] Warning labels
The following warning labels appear on the sewing machine.
Please follow the instructions on the labels at all times when using the machine. If the labels have been removed or are
difficult to read, please contact your nearest Brother dealer.
1
2
3
Be sure to connect the ground. If the
ground connection is not secure, you run
a high risk of receiving a serious electric
shock, and problems with correct
operation may also occur.
Direction of operation
Safety devices:
(A) Finger guard
(B) Thread take-up cover
(C) Belt cover
Oil pan
3824M
3871M
iv
SL-1110
3825M
CONTENTS
1. NAMES OF MAJOR PARTS................ 1
2. MACHINE SPECIFICATIONS .............. 1
3. TABLE.................................................. 2
4. MOTOR ................................................ 2
5. INSTALLATION ................................... 3
5-1. Installation..................................................... 3
5-2. Ground wire connections .............................. 8
5-3. Lubrication .................................................... 8
5-4. Checking the machine pulley rotating
direction ........................................................ 8
6. PREPARATION BEFORE SEWING.... 9
6-1. Installing the needle ...................................... 9
6-2. Removing the bobbin case............................ 9
6-3. Winding the lower thread .............................. 10
6-4. Installing the bobbin case.............................. 10
6-5. Threading the upper thread........................... 11
6-6. Adjusting the stitch length ............................. 11
10. STANDARD ADJUSTMENTS ............ 16
10-1. Adjusting the thread take-up spring ............... 16
10-2. Adjusting arm thread guide R ........................ 17
10-3. Adjusting the presser foot height ................... 17
10-4. Adjusting of the feed dog height .................... 18
10-5. Adjusting the feed dog angle ......................... 18
10-6. Adjusting the needle bar height ..................... 19
10-7. Adjusting the needle and feed mechanism
timing ............................................................. 19
10-8. Adjusting the needle and rotary hook
timing ............................................................. 20
10-9. Adjusting the rotary hook lubrication
amount........................................................... 21
11. TROUBLESHOOTING ...................... 22
7. SEWING ............................................... 12
7-1. Sewing .......................................................... 12
7-2. Backtacking................................................... 12
8. THREAD TENSION .............................. 13
8-1. Adjusting the thread tension.......................... 13
8-2. Adjusting the presser foot pressure .............. 14
9. CLEANING ........................................... 14
SL-1110
1. NAMES OF MAJOR PARTS
2. MACHINE SPECIFICATIONS
1. NAMES OF MAJOR PARTS
3826M 3827M
(1) Needle plate (2) Presser foot (3) Needle bar
(4) Pretension (5) Spool pin (6) Stitch length dial
(7) Machine pulley (8) Reverse lever (9) Bobbin winder
Safety devices
(10) Finger guard (11) Thread take-up cover (12) Belt cover
2. MACHINE SPECIFICATIONS
-3 -5
Use For medium-weight materials For heavy-weight materials
5,500rpm
Max. sewing speed
Max. stitch length 4.2mm 5mm
Presser foot height
Feed dog height 0.8mm 1.2mm
Needle (DB x 1, DP x 5) #11 - #18 #19 - #22
Lifting lever 6mm
Knee lifter 13mm
(Normal sewing speed:
5,000rpm)
4,000rpm
1
SL-1110
3. TABLE
4. MOTOR
3. TABLE
Table processing diagram
The top of the table should be 40 mm in thickness and should be strong enough to hold the weight and with-stand the
vibration of the sewing machine.
Drill holes as indicated in the illustration below.
Ground wire hole
Motor mounting holes
Head rest hole
Cotton stand hole
3828M
4. MOTOR
CAUTION
All cords should be secured at least 25 mm away from any moving parts. Furthermore, do not excessively bend the
cords or secure them too firmly with staples, otherwise there is the danger that fire or electric shocks could occur.
Install the correct belt cover which corresponds to the motor being used.
< Motor >
・ Use one of the clutch motors given in the table at right as the motor.
・ Refer to the instruction manual for the motor for details on installing and
using the motor.
< Motor pulley and V-belt >
Select the correct motor pulley and V-belt by referring to the table below to suit the power frequency of your area.
50Hz 60Hz
Sewing speed
5,000rpm 130 45 115 44
4,000rpm 110 44 90 43
Motor pulley
(Outer diameter)
V-belt Motor pulley
Power Motor
Single-phase 2-pole, 400 W motor
Three-phase 2-pole, 400 W motor
V-belt
(Outer diameter)
SL-1110
2
5. INSTALLATION
5. INSTALLATION
Machine installation should only be carried out by a
qualified technician.
Contact your Brother dealer or a qualified electrician
for any electrical work that may need to be done.
The sewing machine weighs approximately 30 kg.
The installation should be carried out by two or more
people.
Secure the table so that it will not move when tilting
back the machine head. If the table moves, it may
crush your feet or cause other injuries.
5-1. Installation
CAUTION
Do not connect the power cord until installation is
complete. The machine may operate if the treadle is
depressed by mistake, which could result in injury.
Be sure to connect the ground. If the ground
connection is not secure, you run a high risk of
receiving a serious electric shock, and problems
with correct operation may also occur.
Install the belt cover to the machine head.
Left side: White
Right side: Black
Operator
4065M
1. Oil pan
(1) Head cushions (left) [2 pcs]
(2) Head cushions (right) [2 pcs]
(3) Oil pan
(4) Magnet
2. Rubber cushions
(1) Rubber cushions [2 pcs]
(2) Nails [4 pcs]
3
SL-1110
3830M
3. Knee lifter complying bar
(3) Knee lifter complying bar
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