Brother S-7100A Instruction Manual
S-7100A
SINGLE NEEDLE DIRECT DRIVE STRAIGHT LOCK STITCHER
WITH THREAD TRIMMER
INSTRUCTION MANUAL
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.
S-7100A
i
The instructions which follow this term indicate situations where failure to follow the
The instructions which follow this term indicate situations where failure to follow the
situations where failure to follow the
) indicates something that you should be careful of. The picture inside the triangle
do. The picture inside the circle indicates the
(For example, the symbol at left means “you must make the ground connection”.)
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
DANGER
CAUTION
Symbols
WARNING
· · · · ·
· · · · ·
· · · · ·
This symbol (
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
nature of the thing that must be done.
instructions will result in death or serious injury.
instructions could result in death or serious injury.
The instructions which follow this term indicate
instructions may result in minor or moderate injury.
S-7100A
ii
[2] Notes on safety
DANGER
Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet
before opening the cover of the control box. Touching areas where high voltages are present can result in severe
WARNING
CAUTION
nd no dew formation
Excessively dry or humid environments and dew
formation may cause problems with correct
Lightning may cause problems with correct
should be secured in such a way so that they
under any circumstances, as they can cause
injury.
Do not allow any liquids to get onto this sewing machine, otherwise fire, electric shocks or operating problems may
occur.
If any liquid gets inside the sewing machine (machine head or control box), immediately turn off the power and
disconnect the power plug from the electrical outlet, and then contact the place of purchase or a qualified
technician.
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 32 kg
(70lb). The installation should be carried out by
two or more people.
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.
Turn off the power switch before inserting or
removing the plug, otherwise damage to the
control box could result.
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.
When securing the cords, do not bend the cords
excessively or fasten them too hard with staples,
otherwise there is the danger that fire or electric
shocks could occur.
Installation
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, a
should occur in any devices.
operation.
In the event of an electrical storm, turn off the power
and disconnect the power cord from the wall outlet.
operation.
If using a work table which has casters, the casters
cannot move.
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 both hands to hold the machine head when
tilting it back or returning it to its original position. If
only one hand is used, the weight of the machine
head may cause your hand to slip, and your hand
may get caught.
Be sure to wear protective goggles and gloves
when handling the lubricating oil and grease, so that
they do not get into your eyes or onto your skin,
otherwise inflammation can result.
Furthermore, do not drink the oil or eat the grease
vomiting and diarrhea.
Keep the oil out of the reach of children.
S-7100A
iii
CAUTION
Sewing
This sewing machine should only be used by
The machine may operate if the treadle is
When not using the machine and when leaving
should be secured in such a way so that they
machine. If the machine is used without these
may result in personal injury or damage to the
Use both hands to hold the machine head when
only one hand is used, the weight of the machine
If an error occurs in machine operation, or if
Turn off the power switch before carrying out
do not get into your eyes or onto your skin,
Furthermore, do not drink the oil or eat the grease
under any circumstances, as they can cause
carry out any maintenance and inspection of the
When carrying out inspection, adjustment and
you touch the surface of the motor, it may cause
If the power switch needs to be left on when
Use both hands to hold the machine head when
Brother will not be held responsible for any
accidents or problems resulting from the use of
If any safety devices have been removed, be
positions and check that they operate correctly
Brother will not be held responsible for any
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.
depressed by mistake, which could result in injury.
When threading the needle
When replacing the bobbin and needle
the machine unattended
If using a work table which has casters, the casters
cannot move.
cleaning. The machine may operate if the treadle is
depressed by mistake, which could result in injury.
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 both hands to hold the machine head when
tilting it back or returning it to its original position. If
only one hand is used, the weight of the machine
head may cause your hand to slip, and your hand
may get caught.
Cleaning
Attach all safety devices before using the sewing
devices attached, injury may result.
Do not touch any of the moving parts or press any
objects against the machine while sewing, as this
machine.
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.
tilting it back or returning it to its original position. If
head may cause your hand to slip, and your hand
may get caught.
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.
Be sure to wear protective goggles and gloves when
handling the lubricating oil and grease, so that they
otherwise inflammation can result.
vomiting and diarrhea.
Keep the oil out of the reach of children.
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
electrical system.
Turn off the power switch and disconnect the power
cord from the wall outlet at the following times,
otherwise the machine may operate if the treadle is
depressed by mistake, which could result in injury.
maintenance
When replacing consumable parts such as the
rotary hook and knife
Always be sure to turn off the power switch and then
wait one minute before opening the motor cover. If
burns.
carrying out some adjustment, be extremely careful
to observe all safety precautions.
Maintenance and inspection
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.
tilting it back or returning it to its original position.
If only one hand is used, the weight of the machine
head may cause your hand to slip, and your hand
may get caught.
When replacing parts and installing optional
accessories, be sure to use only genuine Brother
parts.
non-genuine parts.
absolutely sure to re-install them to their original
before using the machine.
To prevent accidents and problems, do not modify
the machine yourself.
accidents or problems resulting from modifications
made to the machine.
S-7100A
iv
[3] Warning labels
1
2
Touching areas where high voltages are present can
result in severe injury. Turn off the power before
4
Be careful not to get your hands
caught when returning the
its original
position after it has been tilted.
3
Be careful to avoid injury from
6
High temperature warning
7
Be sure to connect the ground. If
the ground connection is not
high risk of
receiving a serious electric
shock, and problems with correct
8
Direction of operation
* Safety devices:
(A) Finger guard (C) Motor cover
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.
opening the cover.
(B) Thread take-up cover
9
machine head to
5
S-7100A
the moving thread take-up.
display
secure, you run a
operation may also occur.
v
Control box
Oil tank
Transformer box
(100 V/400 V system only)
0591D
S-7100A
CONTENTS
1. MACHINE SPECIFICATIONS .................. 1
2. INSTALLATION ............................................ 2
2-1. Table processing diagram ............................. 3
2-2. Installation .................................................... 3
2-3. Lubrication .................................................... 6
2-4. Connecting the cords ..................................... 7
2-4-1. Connecting the cords ................................. 7
2-4-2. Other cords .................................................. 8
3. USING THE OPERATION PANEL
(BASIC OPERATIONS) ............................. 12
3-1. Names and functions .................................... 12
3-2. Sewing start and end backtack stitches ...... 14
3-3. Sewing continuous backtack stitches .......... 15
4. USING THE OPERATION PANEL
(ADVANCED OPERATIONS) .................. 16
4-1. Switching the 4-column display ................... 16
4-2. Setting the sewing speed .............................. 16
4-2-1. Setting the maximum sewing speed ....... 16
4-2-2. Setting the start backtack
sewing speed ............................................... 17
4-3. Setting the counters ...................................... 18
4-3-1. Lower thread counter ................................ 18
4-3-2. Thread trimming counter ......................... 19
4-3-3. Needle replacement counter .................... 20
4-4. Setting basic functions .................................. 21
4-4-1. Changing the needle stop position .......... 21
4-4-2. Correction sewing ....................................... 22
4-4-3. Setting thread wiping ................................ 23
4-5. Adjusting the needle up stop position.......... 24
4-6. Resetting all settings to their defaults ........ 25
7-8. Adjusting the rotary hook lubrication
amount .......................................................... 33
8. TROUBLESHOOTING ................................ 34
8-1. Sewing ........................................................... 34
8-2. Error code displays ....................................... 38
9. 7-SEGMENT DISPLAY ............................... 42
5. CLEANING ...................................................... 26
6. REPLACING THE FIXED KNIFE
AND MOVABLE KNIFE .............................. 27
7. STANDARD ADJUSTMENTS .................. 28
7-1. Adjusting arm thread guide R ...................... 28
7-2. Adjusting the presser foot height ................. 29
7-3. Adjusting of the feed dog height .................. 30
7-4. Adjusting the feed dog angle ........................ 30
7-5. Adjusting the needle bar height ................... 31
7-6. Adjusting the needle and feed
mechanism timing ........................................ 31
7-7. Adjusting the needle and rotary hook
timing ............................................................. 32
S-7100A
S-7100A
1. MACHINE SPECIFICATIONS
1
3
4
Quick reverse
○
Thread wiper
3
3A
5
For light to
medium-weight materials
For medium-weight
materials
For heavy-weight
materials
Max. sewing speed
5,000 sti/min
4,000 sti/min
Sewing speed at the time of shipment
4,000 sti/min
Start backtacking and continuous
backtacking speed
End backtacking speed
1,800 sti/min
Max. stitch length
4.2 mm
5 mm
Lifting lever
6 mm
Knee lifter
13 mm
Feed dog height
0.8 mm
1.0 mm
1.2 mm
Needle (DB x 1, DP x 5)
#11 - #18
#19 - #22
Motor
AC servo motor (4-pole, 450 W)
Control circuit
Microprocessor
0989D
1. MACHINE SPECIFICATIONS
Use
220 - 3,000 sti/min
○
○
Presser foot height
S-7100A
2. INSTALLATION
2
CAUTION
Machine installation should only be carried out by a
approximately 32 kg
. The installation should be carried out by two
Do not connect the power cord until installation is
Secure the table so that it will not move when tilting
back the machine head. If the table moves, it may
machine head when
tilting it back or returning it to its original position. If
only one hand is used, the weight of the machine
head may cause your hand to slip, and your hand
2101B
2089M
0475D
0476D
2. INSTALLATION
qualified technician.
Contact your Brother dealer or a qualified electrician
for any electrical work that may need to be done.
The sewing machine weighs
(70lb)
or more people.
complete. The machine may operate if the treadle is
depressed by mistake, which could result in injury.
About the machine set-up location
・ Do not set up this sewing machine near other equipment such as
televisions, radios or cordless telephones, otherwise such
equipment may be affected by electronic interference from the
sewing machine.
・ The sewing machine should be plugged directly into an AC wall
outlet. Operation problems may result if extension cords are
used.
crush your feet or cause other injuries.
Use both hands to hold the
may get caught.
Carrying the machine
・ The sewing machine should be carried by the arm and the motor
cover by two people as shown in the illustration.
* Do not hold by any part other than the motor cover. If this is not
observed, it may result in damage to the sewing machine.
Tilting back the machine head
・ Hold section (A) with your foot so that the table does not move,
and then push the arm with both hands to tilt back the machine
head.
Returning the machine head to the upright position
1. Clear away any tools, etc. which may be near the table holes.
2. While holding the face plate with your left hand, gently return the
machine head to the upright position with your right hand.
S-7100A
2. INSTALLATION
3
0478D
Control box
mounting
Cotton stand hole
Head rest hole
Cord hole
0592D
2-1. 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.
hole
2-2. Installation
1. Control box + Oil pan
(1) Control box
(2) Bolts [4 pcs]
(3) Nuts [4 pcs]
(4) Spring washers [4 pcs]
(5) Washers [4 pcs]
2. Connecting rod
(6) Connecting rod
(7) Nut
S-7100A
2. INSTALLATION
4
0479D
0480D
3. Rubber cushions
(1) Rubber cushions [2 pcs]
(2) Nails [4 pcs]
(3) Head cushions (left) [2 pcs]
(4) Head cushions (right) [2 pcs]
4. Machine head
(1) Hinges [2 pcs]
(2) Machine head
(3) Head rest
NOTE:
・ Bind the cords together and pass
them through the cord hole
・ Tap the head rest (3) securely into
the table hole. If the head rest (3)
is not pushed in as far as it will go,
the machine head will not be
sufficiently stable when it is tilted
back.
S-7100A
2. INSTALLATION
5
0482D
Within 13 mm
0481D
5. Knee lifter plate
<Knee lifter adjustment>
1. Turn the machine pulley so that the feed dog is below the
top of the needle plate.
2. Lower the presser foot (1) by using the lifting lever (2).
3. Loosen the nut (3).
4. Turn the screw (5) to adjust so that the amount of play in
the knee lifter is approximately 2 mm when the knee lifter
plate (4) is gently pressed.
5. Securely tighten the nut (3).
6. Loosen the nut (6).
7. Turn the adjusting screw (8) to adjust so that the presser
foot (7) is at the desired position within a distance of 13
mm of the needle plate when the knee liter plate is fully
pressed.
8. After adjustment is completed, securely tighten the nut
(6).
S-7100A
2. INSTALLATION
6
CAUTION
power cord until lubrication has been completed, otherwise the machine may operate if the
If care is not taken, inflammation can result. Furthermore, do not drink the lubricating oil. Diarrhea or vomiting may
0483D
2-3. Lubrication
Do not connect 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.
result.
Keep the oil out of the reach of children.
When cutting the nozzle of the oil tank, hold the base of the nozzle securely.
If you hold the end of the nozzle, injury from the scissors may result.
The sewing machine should always be lubricated and the oil
supply replenished before it is used for the first time, and also
after long periods of non-use.
1. Hold the base of the nozzle of the accessory oil tank (1),
and use scissors to cut about half-way along the straight
section (A) of the nozzle.
2. Loosen and remove the nozzle, and then remove the seal
(2).
3. Tighten the nozzle.
4. Tilt back the machine head.
5. Remove the rubber cap (3), and pour lubricating oil into
the oil tank (4) until it reaches the upper reference line (5).
(Approx. 150 ml)
6. Replace the rubber cap (3).
7. Return the machine head to its original position.
NOTE:
When the machine head is tilted back at times such as the
following, lubricating oil may leak out from the oil pan (6).
1) If the machine head is tilted back immediately after
sewing;
2) If the machine head is tilted back a long way when the
head rest has been removed;
3) If lubricating oil is added until the oil level goes above
the upper reference line (5) on the oil tank (4).
<Lubrication oil replenishment interval>
If the oil level drops below the lower reference line (7) on the
oil tank (4), be sure to replenish the oil.
S-7100A
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