Please read this manual before using the machine.
Please keep this manual within easy reach for quick reference.
TWIN NEEDLE (THREE NEEDLE) FEED OFF THE ARM
DOUBLE CHAIN STITCHER
Thank you very much for buying a BROTHER sewing machine. Before using your new machine, please
read the safety instructions below 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 lever, 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.
SAFETY INSTRUCTIONS
z 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
CAUTION
Symbols
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 in-
side 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
................ This symbol () indicates something that you
indicates the nature of the thing that must be done.
(For example, the symbol at left means “you must make the ground connection”.)
x Notes on safety
¡ Machine installation should only be car-
ried out by a qualified technician.
¡ Contact your Brother dealer or a quali-
fied electrician for any electrical work
that may need to be done.
¡ The sewing machine weighs more than
49 kg. The installation should be carried
out by two or more people.
¡ Do not connect the power cord until in-
stallation is complete, otherwise the
machine may operate if the treadle is
pressed by mistake, which could result
in injury.
¡ Be sure to connect the ground. If the
ground connection is not secure, you run
the risk of receiving a serious electric
shock.
must not do.
must do. The picture inside the circle
CAUTION
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 belt covers 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 no oil gets into your eyes or onto
your skin, otherwise inflammation can
result.
Furthermore, do not drink the oil under
any circumstances, as it can cause vom-
iting and diarrhoea.
Keep the oil out of the reach of children.
i
DA-9270
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.
¡ 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.
Cleaning
¡ Turn off the power switch before carry-
ing 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 pressed by mistake, which could result
in injury.
¡ Turn off the power switch at the follow-
ing times, the machine may operate if
the treadle is pressed by mistake, which
could result in injury.
¡ When threading the needle
¡ When replacing the 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.
¡ If an error occurs in machine, or if abnor-
mal 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, con-
tact your nearest Brother dealer or a
qualified technician.
¡ Be sure to wear protective goggles and
gloves when handling the lubricating oil,
so that no oil gets into your eyes or onto
your skin, otherwise inflammation can
result.
Furthermore, do not drink the oil under
any circumstances, as it can cause vom-
iting and diarrhoea.
Keep the oil out of the reach of children.
Maintenance and inspection
¡ Maintenance and inspection of the sew-
ing 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 discon-
nect the power cord from the wall outlet at the following times, otherwise the
machine may operate if the treadle is
pressed by mistake, which could result
in injury.
However, 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.
¡ When carrying out inspection, adjust-
ment and maintenance
¡ When replacing consumable parts
such as the looper
¡ If the power switch needs to be left on
when carrying out some adjustment, be
extremely careful to observe all safety
precautions.
¡ Use only the proper replacement parts
as specified by Brother.
¡ If any safety devices have been re-
moved, 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.
DA-9270
ii
c 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
Safety devices
q Finger guard
w Thread take-up cover
e Pulley cover, etc.
w
Moving parts
may cause injury.
Operate with safety de vices .
Turn off main switch before
threading, changing bobbin
and needle, cleaning etc.
1
2
3
Be sure to connect the ground.
If the ground connection is not
secure, you run the risk of receiving a serious electric shock.
(every three months)........................... 14
DA-9270
iv
1. NAMES OF MAJOR PARTS
2. MACHINE SPECIFICATIONS
1. NAMES OF MAJOR PARTS
q Machine pulley
w Front cover
e Presser
r Needle bar
t Upper thread arm guide
y Lapper
r
Safety device
u Thread take-up cover
i Finger guard
o Pulley cover
e
i
2. MACHINE SPECIFICATIONS
y
u
t
q
o
w
BROTHER INDUSTRIES, LTD.
DA-9270-1
MADE IN JAPAN
Optional device
Specifications-1-2-3-A
ApplicationsLight materials Light - mediumMediumLight materials, with puller
No. of needles22223
Needle TV X 64#12#14#16#11PSU
Needle gauge4.8 mm (3/16)3.2 mm (1/8)6.4 mm (1/4)4.8 mm (3/16)6.4 mm (1/4)
6.4 mm (1/4)4.0 mm (5/32)6.4 mm (1/4)
Max. stitch length3.0 mm3.5 mm3.0 mm
Min. arm size171 mm
Specifications
materialsmaterials
4.8 mm (3/16)
Max. sewing speed4,000 rpm3,600 rpm
1
DA-9270
3. WORK TABLE AND MOTOR
3. WORK TABLE AND MOTOR
■ Work Table
If using a commercially-available table
¡ 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.
A
C
D
A
Depth 1
+0.5
B
0
Chain hole
B
Motor mounting holes
C
Cotton stand hole
D
Ground hole
■ Motor
CAUTION
¡ All cords which are connected to the motor
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.
<Motor>
¡ Select the correct motor from those listed in the above table.
¡ Refer to the instruction manual for the motor for details on in-
stalling and using the motor.
<Motor pulley and V-belt>
¡ Refer to the table below to select the motor pulley and belt combination.
¡ The belt should be an M-type V-belt.
Pulley O.D.65707580859095100
M42
..
..
....
..
Belt size (inches)
Sewing speed (rpm)
.
.
..
..
50Hz310036004000
60Hz 310036004000
..
....
.
..
././
./
././
,,
..........
,
.....
,,
..........
M43
..
../../
.
../
..
../../
¡ Install the correct belt cover which corresponds
to the motor being used.
..
.
..
..
.
..
M44
......
...
......
,,
,
,,
PowerMotor
Single-phase2-pole, 400 W motor
Three-phase2-pole, 400 W motor
..
../../
.
../
..
../../
DA-9270
2
4. INSTALLATION
4. INSTALLATION
CAUTION
CAUTION
¡ The sewing machine should only be installed
by a qualified technician.
¡ Ask your Brother dealer or a qualified electri-
cian for any electrical work that may need to
be done.
¡ The sewing machine weighs more than 49 kg.
The installation should be carried out by two
or more people.
4-1. Installing the machine head
t
r
q
e
¡ Do not connect the power cord until installation
is complete, otherwise the machine will operate if the treadle is pressed by mistake, which
could result in injury.
¡ Be sure to connect the ground. If the ground
connection is not secure, serious electric shocks
will result.
¡ Install the pulley cover to the machine head.
1. Install pulley cover base w on machine bed q with two
hexagonal bolts
2. Insert two bar cushions
of the bed.
e and two washers r.
t into the holes in the bottom
q
(Bottom view)
w
Parallel
r
e
w
w
* At this time, install the two hexagonal bolts e so that
they go as far as possible into the notches in the
pulley cover base
Furthermore, check that the pulley cover base
parallel to the bed. (If it is not parallel, the pulley
cover may touch the machine pulley.)
w.
w is
3
DA-9270
4. INSTALLATION
u
y
i
u
o
!0
u
3. Place the machine head on the table, adjust its position in forward and backward directions by aligning it
with the hole for presser bar lifter chain
wise directions by aligning it with belt hole
4. After fastening cushions u to the machine bed and
pulley cover base with set screws i, fix them to the
table with screws
* Place the work table so that the machine head is
horizontal.
If the machine head is not horizontal, lubrication will
not be carried out correctly.
o.
y, and in side-
!0.
!1
4-2. Ground wire connections
r
q
e
w
To motor
y
!2
5. Connect the presser bar lifter chain y to the knee lifter
lever !1 and the presser lifter pedal !2.
Connect the ground wire to the sewing machine head and
motor.
(Use the correct type of ground wire and washer.)
1. Remove lower thread guide holder screw
2. Secure the ground wire q to the sewing machine head
with screw
(The attachment location is indicated by a ground sym-
r.)
bol
3. Pass the ground wire
4. Connect the ground wire
with the instructions in the instruction manual for the
motor.
w and washer e.
q through the hole in the table.
q to the motor in accordance
w.
DA-9270
4
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