Brother DA-9270 Instruction Manual

INSTRUCTION MANUAL
DA-9270
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
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.
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.
Direction of operation
3
e
q
2
<Rear view>
iii

CONTENTS

1. NAMES OF MAJOR PARTS...................... 01
2. MACHINE SPECIFICATIONS ..................... 01
3. WORK TABLE AND MOTOR .................... 02
4. INSTALLATION............................................. 03
4-1. Installing the machine head ............... 03
4-2. Ground wire connections ................... 04
4-3. Installing the pulley cover .................. 05
4-4. Belt tension adjustment ...................... 06
4-5. Cotton stand......................................... 06
4-6. Lubrication ............................................ 07
4-7. Checking the machine pulley
rotating direction ................................. 08
5. PREPARATION BEFORE SEWING ........... 08
5-1. Needles and threads ............................ 08
5-2. Installing the needles .......................... 08
5-3. Threading the lower threads.............. 09
5-4. Threading the upper threads ............. 09
6. SEWING......................................................... 10
6-1. Sewing .................................................. 10
7. THREAD TENSION...................................... 11
7-1. Adjusting the thread tension ............. 11
7-2. Presser foot pressure adjustment ..... 11
7-3. Adjusting the stitch length................. 12
7-4. Puller feed adjustment (Machines
with puller) ........................................... 12
9. STANDARD ADJUSTMENTS ................... 15
9-1. Needle bar height adjustment ........... 15
9-2. Needle and looper timing
adjustment............................................ 16
9-3. Timing of loopers running clear of
needles .................................................. 17
9-4. Needle guard adjustment ................... 17
9-5. Feed dog height adjustment .............. 18
9-6. Upper thread take-up thread
guide adjustment................................. 19
9-7. Upper thread arm thread guide
adjustment............................................ 19
9-8. Thread release shaft adjustment ....... 19
9-9. Lower thread take-up timing
adjustment............................................ 19
9-10. Installing the lapper ............................. 20
9-11. Puller height adjustment
(Machines with puller) ........................ 20
9-12. Puller device timing adjustment
(Machines with puller) ........................ 20
10.TROUBLESHOOTING ................................. 21
8. CLEANING..................................................... 14
8-1. Daily cleaning ....................................... 14
8-2. Changing the lubricating oil
(every three months)........................... 14
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 Applications Light materials Light - medium Medium Light materials, with puller
No. of needles 2 2 2 2 3 Needle TV X 64 #12 #14 #16 #11PSU Needle gauge 4.8 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 length 3.0 mm 3.5 mm 3.0 mm Min. arm size 171 mm
Specifications
materials materials
4.8 mm (3/16)
Max. sewing speed 4,000 rpm 3,600 rpm
1

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. 65 70 75 80 85 90 95 100
M42
..
..
....
..
Belt size (inches)
Sewing speed (rpm)
.
.
..
..
50Hz 3100 3600 4000 60Hz 3100 3600 4000
..
....
.
..
././
./
././
,,
..........
,
.....
,,
..........
M43
..
../../
.
../
..
../../
¡ Install the correct belt cover which corresponds
to the motor being used.
..
.
..
..
.
..
M44
......
...
......
,,
,
,,
Power Motor
Single-phase 2-pole, 400 W motor
Three-phase 2-pole, 400 W motor
..
../../
.
../
..
../../
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
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.
4
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