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SL-1110 S-7550A
INSTRUCTION MANUAL
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
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
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
CAUTION
Symbols
The instructions which follow this term indicate situations where failure to follow the instructions could cause injury when using the machine or physical damage to equipment and surroundings.
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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”.)
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”.)
SL-1110 |
i |
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
[2] Notes on safety
CAUTION
Environmental requirements
Use the sewing machine in an area which is free |
The ambient temperature should be within the |
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from sources of strong electrical noise such as |
range of 5°C to 35°C during use. |
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electrical line noise or static electric noise. |
Temperatures which are lower or higher than this |
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Sources of strong electrical noise may cause |
may cause problems with correct operation. |
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problems with correct operation. |
The relative humidity should be within the range of |
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Any fluctuations in the power supply voltage |
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45% to 85% during use, and no dew formation |
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should be within ±10% of the rated voltage for the |
should occur in any devices. |
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machine. |
Excessively dry or humid environments and dew |
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Voltage fluctuations which are greater than this |
formation may cause problems with correct |
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may cause problems with correct operation. |
operation. |
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The power supply capacity should be greater than |
In the event of an electrical storm, turn off the power |
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the requirements for the sewing machine's power |
and disconnect the power cord from the wall outlet. |
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consumption. |
Lightning may cause problems with correct |
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Insufficient power supply capacity may cause |
operation. |
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problems with correct operation. |
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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.
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.
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 |
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
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.
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.
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
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 |
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
[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
Safety devices:
(A)Finger guard
(B)Thread take-up cover
(C)Belt cover
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
3824M
Oil pan
3871M
3825M
iv |
SL-1110 |
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
CONTENTS
1. |
NAMES OF MAJOR PARTS................ |
1 |
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2. |
MACHINE SPECIFICATIONS.............. |
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3. |
TABLE.................................................. |
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4. |
MOTOR ................................................ |
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5. |
INSTALLATION ................................... |
3 |
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5-1. |
Installation..................................................... |
3 |
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5-2. |
Ground wire connections .............................. |
8 |
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5-3. |
Lubrication .................................................... |
8 |
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5-4. Checking the machine pulley rotating |
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direction ........................................................ |
8 |
6. |
PREPARATION BEFORE SEWING.... |
9 |
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6-1. |
Installing the needle ...................................... |
9 |
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6-2. Removing the bobbin case............................ |
9 |
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6-3. Winding the lower thread .............................. |
10 |
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6-4. Installing the bobbin case.............................. |
10 |
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6-5. Threading the upper thread........................... |
11 |
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6-6. Adjusting the stitch length ............................. |
11 |
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7. |
SEWING ............................................... |
12 |
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7-1. |
Sewing .......................................................... |
12 |
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7-2. |
Backtacking................................................... |
12 |
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8. |
THREAD TENSION.............................. |
13 |
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8-1. Adjusting the thread tension.......................... |
13 |
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8-2. Adjusting the presser foot pressure .............. |
14 |
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9. |
CLEANING ........................................... |
14 |
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10. STANDARD ADJUSTMENTS............ |
16 |
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10-1. Adjusting the thread take-up spring ............... |
16 |
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10-2. Adjusting arm thread guide R ........................ |
17 |
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10-3. Adjusting the presser foot height ................... |
17 |
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10-4. Adjusting of the feed dog height .................... |
18 |
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10-5. Adjusting the feed dog angle ......................... |
18 |
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10-6. |
Adjusting the needle bar height ..................... |
19 |
10-7. |
Adjusting the needle and feed mechanism |
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timing ............................................................. |
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10-8. |
Adjusting the needle and rotary hook |
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timing ............................................................. |
20 |
10-9. |
Adjusting the rotary hook lubrication |
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amount........................................................... |
21 |
11. TROUBLESHOOTING ...................... |
22 |
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SL-1110
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
1.NAMES OF MAJOR PARTS
2.MACHINE SPECIFICATIONS
1. NAMES OF MAJOR PARTS
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3826M |
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3827M |
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(1) |
Needle plate |
(2) |
Presser foot |
(3) |
Needle bar |
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(4) |
Pretension |
(5) |
Spool pin |
(6) |
Stitch length dial |
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(7) |
Machine pulley |
(8) |
Reverse lever |
(9) |
Bobbin winder |
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Safety devices |
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(10) Finger guard |
(11) Thread take-up cover |
(12) Belt cover |
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2. MACHINE SPECIFICATIONS
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-3 |
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-5 |
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Use |
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For medium-weight materials |
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For heavy-weight materials |
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5,500rpm |
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Max. sewing speed |
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(Normal sewing speed: |
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4,000rpm |
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5,000rpm) |
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5mm |
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Max. stitch length |
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4.2mm |
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Presser foot height |
Lifting lever |
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6mm |
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Knee lifter |
13mm |
1.2mm |
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Feed dog height |
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0.8mm |
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Needle (DB x 1, DP x 5) |
#11 - #18 |
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#19 - #22 |
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1 |
SL-1110 |
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
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 |
Head rest hole |
Motor mounting holes
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 >
Power |
Motor |
Single-phase |
2-pole, 400 W motor |
Three-phase |
2-pole, 400 W motor |
Select the correct motor pulley and V-belt by referring to the table below to suit the power frequency of your area.
Sewing speed |
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50Hz |
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60Hz |
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Motor pulley |
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V-belt |
Motor pulley |
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V-belt |
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(Outer diameter) |
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(Outer diameter) |
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5,000rpm |
130 |
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45 |
115 |
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44 |
4,000rpm |
110 |
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44 |
90 |
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43 |
SL-1110 |
2 |
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
5. INSTALLATION
5. INSTALLATION
CAUTION
Machine installation should only be carried out by a |
Do not connect the power cord until installation is |
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qualified technician. |
complete. The machine may operate if the treadle is |
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Contact your Brother dealer or a qualified electrician |
depressed by mistake, which could result in injury. |
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Be sure to connect the ground. If the ground |
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for any electrical work that may need to be done. |
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The sewing machine weighs approximately 30 kg. |
connection |
is not secure, you run |
a high risk of |
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receiving a |
serious electric shock, |
and problems |
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The installation should be carried out by two or more |
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with correct operation may also occur. |
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people. |
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Install the belt cover to the machine head. |
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Secure the table so that it will not move when tilting |
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back the machine head. If the table moves, it may |
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crush your feet or cause other injuries. |
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5-1. Installation
Left side: White |
Right side: Black |
1. Oil pan |
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(1) |
Head cushions (left) [2 pcs] |
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(2) |
Head cushions (right) [2 pcs] |
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(3) |
Oil pan |
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(4) |
Magnet |
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Operator 4065M
2. Rubber cushions
(1) Rubber cushions [2 pcs]
(2) Nails [4 pcs]
3. Knee lifter complying bar
(3) Knee lifter complying bar
3830M
3 SL-1110
From the library of Superior Sewing Machine & Supply LLC - www.supsew.com
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