SINGLE NEEDLE DIRECT DRIVE STRAIGHT LOCK STITCHER
WITH THREAD TRIMMER
Please read this manual before using the machine.
Please keep this manual within easy reach for quick reference.
This basic operation manual describes basic
operations including sewing machine operations.
For cleaning, standard adjustments and more details,
please refer to the instruction manual contained in
the Document CD.
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-7200B
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
· · · · ·
· · · · ·
· · · · ·
The instructions which follow this term indicate situations where failure to follow the
instructions may result in death or serious injury.
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.
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”.)
S-7200B
i
[2] Notes on safety
Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet
before opening the face plate of the control box. Touching areas where high voltages are present can result in
severe injury.
DANGER
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 more than 44 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.
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.
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
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.
If using a work table which has casters, the casters
should be secured in such a way so that they
cannot move.
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
under any circumstances, as they can cause
vomiting and diarrhea.
Keep the oil out of the reach of children.
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S-7200B
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 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.
Turn off the power switch before carrying out
cleaning. The machine may operate if the treadle is
depressed by mistake, which could result in injury.
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.
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.
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.
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
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
under any circumstances, as they can cause
vomiting and diarrhea.
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,
otherwise 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.
S-7200B
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.
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.
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.
Document CD ........................................... 21
S-7200B
A
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1. CONVENIENT FUNCTION FOR SMOOTH SEWING
1. CONVENIENT FUNCTION FOR SMOOTH SEWING
Lower thread counter
INSTRUCTION MANUAL CD
5-7. Using the lower thread counter
The graphic display lights and a buzzer
sounds before the bobbin thread runs
out, so that the operator can concentrate
on the job with confidence.
Notification given when greasing is required
INSTRUCTION MANUAL CD
11-2. Applying grease
Selectable starting speed
The sewing speed at the sewing start can be
selected in accordance with the treadle
depression amount. You can set the speed
according to the preferences of the operator.
(Contact the place of purchase.)
Easy setting of sewing speed from operation panel
Page 17
3163M
3719M
The sewing speed can be easily set by the
sewing speed control keys.
Condensed stitching
INSTRUCTION MANUAL CD
9-3. Sewing condensed stitches
This feature is ideal for use when sewing thin
materials that can easily pucker when reverse
stitches are sewn. Condensed stitches have a
smaller sewing pitch and they help prevent
fraying.
Sewing direction
Actuator
INSTRUCTION MANUAL CD
13-1. Adjusting the actuator position
The installation position for the actuator can
be adjusted to <A> or <B>. Adjust so that it is
in a position where it is easy to operate.
Maximum presser foot lift amount 16 mm
The knee lifter and the needle
up stop (reverse rotation) function together provide 16 mm of
space underneath the presser
foot. This makes it much easier
to insert and remove heavy
material without it getting caught
on the needle.
(Contact the place of purchase.)
3720M3721M
Floating presser foot for easy handling
INSTRUCTION MANUAL CD
13-12. Adjusting the presser foot floating amount
micro-adjustable type floating presser foot is equipped as
standard. This device is ideal for controlling presser foo
floating in materials that stretch easily and materials with
long pile. It prevents seam slippage and also prevents
damage to the material. In addition, three-dimensional
articles with irregular curves can also be handled with ease.
Condensed stitches
3165M
1
S-7200B
2. NAMES OF MAJOR PARTS
2. NAMES OF MAJOR PARTS
(1) Bobbin winder (2) Thread wiper (-4[][] specifications)
(3) Lifting lever (4) Quick reverse (Actuator)
(5) Presser foot (6) Control box
(7) Control box panel (8) Knee lifter assembly
(9) Power switch (10) Oil gauge window (-[]0[], []3[] specifications)
(11) Reverse lever (12) Stitch length dial
(13) Machine pulley (14) Operation panel (Models with operation panel)
(15) Cotton stand
Safety devices
(16) Thread take-up cover (17) Finger guard
3630M
S-7200B
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