JUKI DDL-8000A User manual

DDL-8000A
INSTRUCTION MANUAL

CONTENTS
1. SPECIFICATIONS............................................................................................................ 1
1-1. Specications of the sewing machine head ..................................................................... 1
1-2. Specications of the control box....................................................................................... 1
2. SET UP............................................................................................................................. 2
2-1. Drawing of table................................................................................................................... 2
2-2. Cautions when setting up the sewing machine................................................................ 3
2-2-1. How to carry the sewing machine ............................................................................................ 3
2-2-2. Caution when placing the sewing machine............................................................................. 3
2-3. Installation............................................................................................................................ 3
2-4. Installing the pedal sensor ................................................................................................. 4
2-5. Connecting the connector .................................................................................................. 5
2-6. Installing the power switch (for CE) .................................................................................. 6
2-7. Installing the reactor box.................................................................................................... 7
2-8. How to install the power plug............................................................................................. 8
2-9. Installing the thread stand.................................................................................................. 9
2-10. Attaching the connecting rod............................................................................................. 9
2-11. Adjustment of the pedal.................................................................................................... 10
2-11-1. Installing the connecting rod................................................................................................ 10
2-11-2. Adjusting the pedal angle...................................................................................................... 10
2-12. Pedal operation.................................................................................................................. 10
2-13. Power switch...................................................................................................................... 11
2-14. Lubrication ......................................................................................................................... 12
3. PREPARATION BEFORE SEWING .............................................................................. 13
3-1. Attaching the needle ......................................................................................................... 13
3-2. Removing/tting the bobbin case.................................................................................... 13
3-3. Winding the bobbin thread ............................................................................................... 14
3-4. Threading the machine head............................................................................................ 15
3-5. Thread tension................................................................................................................... 15
3-5-1. Adjusting the needle thread tension...................................................................................... 15
3-5-2. Adjusting the bobbin thread tension ..................................................................................... 15
3-6. Presser foot pressure ....................................................................................................... 16
3-7. Adjusting the stitch length ............................................................................................... 16
3-8. Changing the sewing speed ............................................................................................. 17
3-9. LED hand light ................................................................................................................... 18
3-10. Reverse feed stitching ...................................................................................................... 18
3-11. Adjusting the amount of oil (oil splashes) in the hook .................................................. 19
3-11-1. Adjusting the amount of oil in the hook............................................................................... 19
3-11-2. How to conrm the amount of oil (oil splashes)................................................................. 20
3-11-3. Sample showing the appropriate amount of oil.................................................................. 20
3-12. Adjusting the thread take-up spring and the thread take-up stroke............................. 21
4. FOR THE OPERATOR................................................................................................... 22
4-1. How to set the machine head and to initialize data (the factory-set state at the time
of shipment)....................................................................................................................... 22
i

4-2. Operation panel ................................................................................................................. 23
4-3. Audio guidance.................................................................................................................. 25
4-4. Setting the clock................................................................................................................ 26
4-5. Operating procedure of the sewing pattern.................................................................... 27
4-5-1. Reverse feed stitching pattern ............................................................................................... 27
4-5-2. Overlapped stitching pattern .................................................................................................. 28
4-5-3. Polygonal-shape stitching pattern ......................................................................................... 29
4-6. Function setting................................................................................................................. 31
4-7. Setting the function keys (F1 and F2).............................................................................. 32
4-8. Production support function ............................................................................................ 33
4-8-1. How to set the production support parameters.................................................................... 33
4-8-2. List of production support parameters.................................................................................. 34
4-8-3. How to display the operation rate of the sewing machine................................................... 35
4-8-4. How to display the number of pieces produced ................................................................... 36
4-9. Function setting list .......................................................................................................... 37
4-10. Detailed explanation of selection of functions ............................................................... 42
4-11. How to use the bobbin counter........................................................................................ 48
4-12. Initialization of function setting data ............................................................................... 49
4-13. Password lock ................................................................................................................... 50
4-14. About the USB ................................................................................................................... 51
5. ADJUSTMENT OF THE MACHINE HEAD (APPLICATION) ........................................ 52
5-1. Needle-to-hook relationship ............................................................................................. 52
5-2. Adjusting the needle thread presser device ................................................................... 53
5-3. Adjusting the thread trimmer ........................................................................................... 56
5-3-1. For checking of the thread trimming cam timing ................................................................. 56
5-3-2. Adjustment of the thread trimming cam timing .................................................................... 56
5-3-3. Checking of the knife unit ....................................................................................................... 57
5-3-4. Adjustment of the knife unit.................................................................................................... 58
5-4. Adjusting the main shaft stop position ........................................................................... 59
5-5. Grease shortage warning ................................................................................................. 60
5-5-1. Grease shortage warning........................................................................................................ 60
5-5-2. Grease shortage error ............................................................................................................. 60
5-5-3. How to reset the grease shortage error................................................................................. 61
5-6. Disposal of batteries ......................................................................................................... 62
6. CARE ............................................................................................................................. 63
6-1. Cleaning ............................................................................................................................. 63
6-2. Applying grease................................................................................................................. 64
6-3. Applying grease to the needle bar lower bushing.......................................................... 64
7. LIST OF ERROR CODES .............................................................................................. 65
ii

– 1 –
DDL-8000A-PMS DDL-8000A-PSH
Max. sewing speed 5,000 sti/min (P = Less than 4)
4,000 sti/min for "P= 4 or more"
4,500 sti/min (P = Less than 4)
4,000 sti/min for "P= 4 or more"
Stitch length 5 mm
Presser foot lift Hand lifter 5.5 mm
Auto lifter 13 mm or more
Audio guidance Provided
Needle *1 1738 Nm65 to 110 (DB × 1 #9 to 18)
134 Nm65 to 110 (DP × 5 #9 to 18)
1738 Nm125 to 160 (DB × 1 #20 to 23)
134 Nm125 to 160 (DP × 5 #20 to 23)
Lubricating oil JUKI NEW DEFRIX OIL No. 1 or JUKI CORPORATION GENUINE OIL 7
Motor AC servo motor
Noise
PMS ;
- Equivalent continuous emission sound pressure level (LpA) at the workstation:
A-weighted value of 78.7 dBA ; (Includes KpA = 2.5 dBA) ; according to ISO 10821- C.6.2
-ISO 11204 GR2 at 4,000 sti/min.
PSH ;
- Equivalent continuous emission sound pressure level (LpA) at the workstation:
A-weighted value of 82.0 dBA ; (Includes KpA = 2.5 dBA) ; according to ISO 10821- C.6.2
-ISO 11204 GR2 at 4,000 sti/min.
1. SPECIFICATIONS
• The sewing speed will vary depending on the sewing conditions. The sewing speed preset at the time of
shipping is 4,000 sti/min.
*1 : Needle used depends on the destination.
1-1. Specications of the sewing machine head
1-2. Specications of the control box
DDL-8000A-P - B
Supply
voltage
Single phase
200 to 240V
3-phase
200 to 240V
Single phase
220 to 240V CE
Frequency 50Hz/60Hz 50Hz/60Hz 50Hz/60Hz
Operating environment Temperature : 0 to 35˚C
Humidity : 90% or less
Temperature : 0 to 35˚C
Humidity : 90% or less
Temperature : 0 to 35˚C
Humidity : 90% or less
Input 330VA 330VA 170VA
Face plate portion lubricating method
M Semi-dry
S Micro-quantity lubrication
Seam specication
S Medium-weight materials
H Heavy-weight materials
Needle thread nipper specication
N With
0 Without

2×Ｒ10
30
30
60
190
240
297
140
115
50
Ｒ20
Ｒ20
（525.4） 520
154.6
（138.5）
68.5
±0.5
（172.5）
18
Q Q
Z
Z
Ｚ
Ｚ
X X
X X
Ｙ
Ｙ
279 ±1
Ｒ18
Y
Y
T T
U U
WW
R242.5
R242.5
S
S
（15）
390
100
22.5 136
(22.5)
181
0
-1
110
(244)
80
80
80
R20
R22.5
R30
R30
R18
R22.5
29
R10
R10
R10
R10
R20
R22.5
29
50
50
90
1200
R22.5
40
70
535
R30
R30
R30
R30
R6
R6
(591)
141 139
43 86.5
21.5
21.5 84
18
75
52
9
14
17 55
27.5
195
52.5
90
R27.5
R27.5
360
810
R8
R8
R8
R8
R8
R8
40°
27
Ｒ2
Ｃ1
C1
R2
R2
40
R2
R2
（6）
W-W
40°
40°
R2
R2
R2
R2
R2
14
10
U-U
17.5
±0.5
X-X(2ヵ所）
Y-Y（２ヵ所）
23.5
±0.5
Z-Z（２ヵ所）
19.5
±0.5
T-T
1
±0.5
X-X部ｺﾞﾑ取付参考図
1.2
±0.5
1.2
±0.5
Y-Y部ｺﾞﾑ取付参考図
21
+0.5
0
20
+0.5
0
S-S
10
±1
∅16
±0.5
∅26
Q-Q
32 ±1
A
BC
E
F
G
H
I
D
– 2 –
2. SET UP
2-1. Drawing of table
(2 locations) (2 locations) (2 locations)
Y-Y
Rubber cushion
installing drawing for
reference
X-X
Rubber cushion
installing drawing for
reference
A4×ø3.4 on the bottom surface, depth 20 (Drill a hole at the time of set-up.) BInstalling position of drawer stopper (on the reverse side) Cø17 drilled hole D3×ø13 drilled hole E2×ø3.5, depth 10 F2×ø3.5, depth 10 G Through hole H2×ø3.4 on the bottom surface, depth 10 (Drill a hole at the time of set-up.) I C1.5 to C2.5 (hinge side only)

×
❻
❹❼
– 3 –
2-2. Cautions when setting up the sewing machine
2-2-1. How to carry the sewing machine
Carry the sewing machine while holding the machine
arm with two persons as shown in the gure.
1. Never hold the handwheel since it
rotates.
2. Be sure to handle the sewing ma-
chine with two persons or more since
the sewing machine weighs 40 kg or
more.
2-2-2. Caution when placing the sewing ma-
chine
Place the sewing machine on a horizontal and plane
place when placing it and do not place any protrud-
ing thing such as a screwdriver or the like.
Do not hold the handwheel.
2-3. Installation
Thank you very much for the purchase of JUKI Industrial Sewing Machine this time. Make sure of items 2-1
through 2-14 before operating to use this sewing machine with ease.
1) The under cover ❹should rest on the four cor-
ners of the machine table groove. Mount rubber
hinge seat ❺ on the table and x it on the table
with a nail.
2) Fix two rubber seats ❶on side A(operator’s
side) using nails ❷as illustrated above. Fix two
cushion seats ❸on side B(hinged side) using a
rubber-based adhesive. Then place under cover
❹ on the xed seats.
3) Fit hinge ❼into the opening in the machine bed,
and t the machine head to table rubber hinge
seat ❺before placing the machine head on cush-
ions ❻on the four corners.
❶
❸
❺
❶
❸
23.5 mm 19.5 mm
❶
❹
❸
AB
❷
1.2 ± 0.5 mm
1.2 ± 0.5 mm
1 ± 0.5 mm

❹
❶
– 4 –
Be sure to mount the machine head sup-
port rod
❹
on the machine table so that
its height from the table surface becomes
56 to 60 mm.
4) Securely attach head support rod ❹to the table
until it goes no further.
2-4. Installing the pedal sensor
1) Install the pedal sensor to the table with mounting
screws ❶supplied with the unit.
It is necessary to install the pedal sensor at such
a position that the connecting rod is perpendicular
to the table.
2) After the completion of installation of the pedal
sensor on the table, place the sewing machine
head on the table.

❸
❶
❷
❶
❶
❹
❹
❸
❷
❹
❺
– 5 –
2-5. Connecting the connector
WARNING :
• To protect against personal injury resulting from abrupt start of the sewing machine, be sure to turn
the power OFF, unplug the machine and wait for ve minutes or more before installing the pedal
sensor.
• To prevent damage of device caused by maloperation and wrong specications, be sure to connect
all the corresponding connectors to the specied places. (If any of the connectors is inserted into a
wrong connector, not only the device corresponding to the connector can break but also it can start
abruptly, inviting the risk of personal injury.)
• To prevent personal injury caused by maloperation, be sure to lock the connector with lock.
• Do not connect the power plug until the connection of cords is completed.
• Fix the cords while taking care not to forcibly bend them or excessively clamp them with staples.
• As for the details of handling respective devices, read carefully the Instruction Manuals supplied
with the devices before handling the devices.
1. Do not insert the power plug into the
wall outlet.
2. Check to be sure that the power
switch is turned OFF.
3. Be sure to fully insert the connectors
into the corresponding ports until
they are locked.
Pedal sensor Slack
Underside of the table
1) Draw out pedal sensor cable ❶and AC input
cable ❷coming from the electrical box to the
undersurface of the sewing machine table through
cable draw-out hole ❸.
2) Connect pedal sensor cable ❶and the connector
under the table.
3) Secure pedal sensor cable ❶and AC
input cable ❷with staples ❹.
[EU-type models]
Install ring core ❺.
For one ring core ❺, clamp the pedal
sensor cable ❶after winding the cable
round the torus of the ring core three
times.
Eu-type

– 6 –
❶
1ø 220V-240V
❷
❸
2-6. Installing the power switch (for CE)
Do not insert the power plug into the
plug receptacle.
1) Remove screw ❶on the side face of the power
switch cover to open the power switch cover.
Blue Blue
Brown Brown
Green/
Yellow
Green/
Yellow
2) Pass AC input cord ❷, ❸through the rear face of
the power switch. Bundle the cord with cable clip
band ❹to secure it.
3) Securely x the terminals of the AC input cord ❷,
❸ by tightening the screws at the specied loca-
tions.
4) Close the power switch cover. Tighten screw ❶
on the side face of the power switch cover.
❷
❹
WARNING :
1. Be sure to attach the ground wire (green/yellow) to the specied location (on the ground side).
2. Take care not to allow terminals to come in contact with each other.
3. When closing the power switch cover, take care not to allow the cord to be caught under it.

– 7 –
2-7. Installing the reactor box
* For the EU-type models, install the reactor box that is supplied with the sewing machine.
❽
󱢳
󱢴
1) Connect the terminals of power cord ❶of the
electrical box to reactor-box PCB asm. ❷and
to reactor box mounting plate ❸.
Connect brown wire A to the rst connector
and blue wire Bto the third connector respec-
tively from the top of terminal block on the
reactor box PCB asm. using screws. Connect
green/yellow wire Cto reactor box mounting
plate ❸with earth setscrew ❹.
2) Attach cable clip ❺to the power cord of elec-
trical box. Attach the power cord together with
the cable clip to reactor box mounting plate ❸
with cable clip setscrew ❻.
3) Attach cord bushes ❽to input/output cables
❶and ❼of the reactor box. Attach both
bushes in the same manner.
4) Attach reactor box cover 󱢳to reactor box
mounting plate ❸with four reactor-box cover
setscrews ❾.
At this time, x cord bushes ❽attached to
input/output cables ❶and ❼in the concave
section on reactor box cover 󱢳to eliminate a
gap between reactor box 󱢴and cover 󱢳.
5) Install reactor box 󱢴on the table stand with
four accessory wood screws 󱢵.
Adjust the installing position according to
the size of table stand so that the reactor
box does not protrude from the edge of table
stand.
6) Install accessory ring cores 󱢷.
For two ring cores 󱢷, clamp the power cord
of the electrical box after winding the cable
round the torus of the ring core twice.
7) Fix input/output cables ❶and ❼of reactor
box 󱢴on the table stand using accessory
cord staple 󱢶.
At this time, take care not to cross the input-
and output-cables.
❼
❽
❽
❶
❾
󱢳
❸
❾
❸
❶
A
B
❻
C
❷❹
❺
󱢵
󱢴
❼
Operator's side
Power box
❼
󱢶
❶󱢷
󱢴
Undersurface of table
󱢶
󱢷
󱢶

❶
– 8 –
2) Check that the power switch is in the OFF state.
Then, insert the power plug ❶coming from the
power switch into the plug receptacle.
In prior to the connection of the power
plug ❶, re-check the supply voltage
specication indicated on the control
box.
* The power plug ❶ is di󰀨erent in shape accord-
ing to the destination of the sewing machine.
2-8. How to install the power plug
WARNING :
1. Be sure to attach the ground wire (green/yellow) to the specied location (on the ground side).
2. Take care not to allow terminals to come in contact with each other.
1) Connect the power cord to power plug ❶. Con-
nect the blue and brown wires (1ø) to the power
supply side and the green/yellow wire to the earth
side as illustrated in the gure.
1. Be sure to prepare the power plug ❶
which conforms to the safety stan-
dard.
2. Be sure to connect the ground lead
(green/yellow) to the grounding side.
Blue
Brown
Green / Yellow
(ground wire)
AC 200-240V
1ø 200-240V

❶
❹❸
❸
❷
❶
– 9 –
2-9. Installing the thread stand
1) Assemble the thread stand unit, and in-
sert it in the hole in the machine table.
2) Tighten nut ❶.
2-10. Attaching the connecting rod
Fix connecting rod ❶to installing hole of pedal lever
❷with nut ❸.
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power o󰀨 and a lapse of 5 minutes or more.

❷
❹
❹
❷
❶
❸
A
C
E
D
B
(Neutral
position)
– 10 –
2-11-1. Installing the connecting rod
1) Move pedal ❸to the right or left as illustrated by
the arrows so that motor control lever ❶and con-
necting rod ❷are straightened.
2-11-2. Adjusting the pedal angle
1) The pedal tilt can be freely adjusted by changing
the length of the connecting rod ❷.
2) Loosen adjust screw ❹, and adjust the length of
connecting rod ❷.
2-11. Adjustment of the pedal
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
2-12. Pedal operation
The pedal is operated in the following four steps :
1) The machine runs at low sewing speed when you
lightly depress the front part of the pedal. B
2) The machine runs at high sewing speed when
you further depress the front part of the pedal. A
(If the automatic reverse feed stitching has been
preset, the machine runs at high speed after it
completes reverse feed stitching.)
3) The machine stops (with its needle up or down)
when you reset the pedal to its original position.
C
4) The machine trims threads when you fully depress
the back part of the pedal. E
The presser foot goes up when you lightly depress the back part of the pedal D, and if you further depress
the back part, the thread trimmer is actuated.
When starting sewing from the state that the presser foot has been lifted with the Auto-lifter and you de-
press the back part of the pedal, the presser foot only comes down.
• If you reset the pedal to its neutral position Cduring the automatic reverse feed stitching at seam start,
the machine stops after it completes the reverse feed stitching.
• The machine will perform normal thread trimming even if you depress the back part of the pedal immedi-
ately following high or low speed sewing.
• The machine will completely perform thread trimming even if you reset the pedal to its neutral position C
immediately after the machine started thread trimming action.
5) When you depress lightly the back part of pedal at its neutral position Cbefore starting, the pedal is
brought to the rst presser lifting position D. When you depress the back part of pedal further, the pedal is
brought to the second presser lifting position E.

1) Lightly press the power switch ❶by hand to turn
the power ON. Power switch ❶is in the ON state
when the "I" mark side is pressed. It is in the OFF
state when the "○" side is pressed.
1. Do not strongly tap the power switch
by hand.
2. If the power indicator LED on the
panel does not light up after having
turned ON the power switch ❶, im-
mediately turn OFF the power switch
❶ and check the supply voltage.
When you want to re-turn ON pow-
er switch ❶ after carrying out the
aforementioned steps, it is necessary
to wait for ve minutes or more after
you have turned OFF power switch ❶.
3. Do not place your hand or anything
under the needle since the needle bar
may automatically move according
to the memory switch setting when
you turn ON the power to the sewing
machine.
2-13. Power switch
2) When you depress the back part of pedal, the needle bar and the presser lifting motor carry out their initial
operation to allow the sewing machine to start sewing.
If you attempt to start sewing without depressing the back part of pedal, the warning message
screen shown below will be displayed. To prevent this, be sure to start sewing after depressing
the back part of pedal.
< Origin retrieval screen >
❶
– 11 –

❶
– 12 –
Fill the oil tank with oil for hook lubrication before
operating the sewing machine.
1) Turn ON the power switch. Remove oil hole cap
❶. Pour NEW Defrix Oil No. 1 (part number:
40214221 or MDFRX16000C0) supplied with the
unit or JUKI CORPORATION GENUINE OIL 7 (part
number: 40102087) into the oil tank through the
oil hole.
2) When the oil amount in the oil tank reaches the
maximum amount, ashes on and o󰀨 on the
operation panel and the voice warning is
given.
Stop oiling.
If the oil is lled excessively, it will leak from the
air vent hole in the oil tank or proper lubrication
will be not performed. In addition, when the oil is
vigorously lled, it may overow from the oil hole.
So, be careful.
2-14. Lubrication
WARNING :
1. Do not connect the power plug until the lubrication has been completed so as to prevent accidents
due to abrupt start of the sewing machine.
2. To prevent the occurrence of an inammation or rash, immediately wash the related portions if oil
adheres to your eyes or other parts of your body.
3. In the case of adding oil to the sewing machine while it is energized, do not place your hands into
the moving parts for the sake of safety.
1. When you use a new sewing machine or a sewing machine after an extended period of dis-
use, use the sewing machine after performing break-in at 2,000 sti/min or less.
2. For the oil for hook lubrication, purchase JUKI NEW DEFRIX OIL No. 1 (part number : MD-
FRX1600C0) or JUKI CORPORATION GENUINE OIL 7 (part number : 40102087).
3. Be sure to lubricate clean oil.
4. Do not operate the machine with the oil hole cap ❶ removed. Never remove cap ❶ from the
oil inlet in any case other than oiling. In addition, take care not to lose it.
3) When the remaining amount of oil in the oil tank has reduced, ashes on and o󰀨 on the operation panel
and the voice warning is given.
Rell the oil tank with oil.

C
DB
A
❷
❶
D
B
C
A
– 13 –
Use the specied needle for the machine. Use the
proper needle in accordance with the thickness of
thread used and the kinds of the materials.
1) Turn the handwheel until the needle bar reaches
the highest point of its stroke.
2) Loosen screw ❷, and hold needle ❶with its
indented part Afacing exactly to the right in direc-
tion B.
3) Insert the needle fully into the hole in the needle
bar in the direction of the arrow until the end of
hole is reached.
1) Turn the handwheel to lift the needle above the
throat plate.
2) Install the bobbin in the bobbin case so that the
thread wound direction is clockwise.
3) Pass the thread through thread slit Aof the bob-
bin case, and pull the thread in direction C. By
so doing, the thread will pass under the tension
spring and come out from notch B.
4) Check that the bobbin rotates in the direction of
the arrow when thread is pulled.
5) Pinching latch D of the bobbin case with ngers,
t the bobbin case in the hook.
3. PREPARATION BEFORE SEWING
3-1. Attaching the needle
3-2. Removing/tting the bobbin case
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
4) Securely tighten screw ❷.
5) Check that long groove Cof the needle is facing exactly to the left in direction D.

E
F
❻
❼
❻
❺
❻
❽
B
❷
A
C
D
❹
❶
❸
– 14 –
1) Insert the bobbin deep into the bobbin winder
spindle ❶until it will go no further.
2) Pass the bobbin thread pulled out from the spool
rested on the right side of the thread stand follow-
ing the order as shown in the gure on the left.
Then, wind clockwise the end of the bobbin thread
on the bobbin several times.
3) Press the bobbin winding lever ❷in the direction
of Aand start the sewing machine. The bobbin
rotates in the direction of Band the bobbin thread
is wound up. The bobbin winder spindle ❶auto-
matically as soon as the winding is nished.
4) Remove the bobbin and cut the bobbin thread
with the thread cut retainer ❸.
5) When adjusting the winding amount of the bob-
bin thread, loosen setscrew ❹and move bobbin
winding lever ❷to the direction of Cor D. Then
tighten setscrew ❹.
To the direction of C: Decrease
To the direction of D: Increase
6) In case that the bobbin thread is not wound evenly
on the bobbin, remove the handwheel, loosen
screw ❺and adjust the height of bobbin thread
tension ❽.
3-3. Winding the bobbin thread
• It is the standard that the center of the bobbin is as high as the center of thread tension disk ❻.
• Adjust the position of thread tension disk ❻to the direction of Ewhen the winding amount of the bobbin
thread on the lower part of the bobbin is excessive and to the direction Fwhen the winding amount of
the bobbin thread on the upper part of the bobbin is excessive.
After the adjustment, tighten screw ❺.
7) To adjust the tension of the bobbin winder, turn the thread tension nut ❼.
1. When winding the bobbin thread, start the winding in the state that the thread between the
bobbin and thread tension disk ❻ is tense.
2. When winding the bobbin thread in the state that sewing is not performed, remove the nee-
dle thread from the thread path of thread take-up and remove the bobbin from the hook.
3. There is the possibility that the thread pulled out from the thread stand is loosened due to
the inuence (direction) of the wind and may be entangled in the handwheel. Be careful of
the direction of the wind.

❶
❷
❺
❹
❸
❻
❼
❽
❾
󱢳
󱢴
󱢵
󱢶
– 15 –
3-4. Threading the machine head
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
3-5-1. Adjusting the needle thread tension
1) Turn thread tension No. 1 nut ❶clockwise (in di-
rection A), to shorten the thread length remaining
on the needle after thread trimming or counter-
clockwise (in direction B), to lengthen the thread
length.
2) Turn thread tension nut ❷clockwise (in direction
C) to increase or counterclockwise (in direction D)
to reduce the needle thread tension.
3-5-2. Adjusting the bobbin thread tension
1) Turn tension adjusting screw ❸clockwise (in
direction E) to increase or counterclockwise (in
direction F) to reduce the bobbin thread tension.
3-5. Thread tension
❸EF
❶
❷
A
B
C
D
(Note)
Do not pass this thread
through section A.
A
[S type] [H type]
[NB type] [0B type]
(Note)
Be sure to pass the thread
through the section B.
B

– 16 –
3-6. Presser foot pressure
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of the
sewing machine.
1) Loosen nut ❷. As you turn presser spring regula-
tor ❶clockwise (in direction A), the presser foot
pressure will be increased.
2) As you turn the presser spring regulator ❶count-
er-clockwise (in direction B), the pressure will be
decreased.
3) After adjustment, tighten nut ❷.
The standard value of the height Cof presser spring
regulator ❶is as follows :
• S type : 31.5 to 29 mm
(approx. 40 to 45 N / 4 to 4.5 kg)
• H type : 31.5 to 28 mm
(approx. 50 to 60 N / 5 to 6 kg)
AB
C
❶
❷
To avoid personal injury, never put your
ngers under the presser foot.
* The dial calibration is in millimeters.
1) Turn stitch length dial ❶in the direction of the
arrow, and align the desired number to marker dot
Aon the machine arm.
2) To change over the feed scale mark from "large"
to "small", turn stitch dial ❶while pressing feed
lever ❷in the direction of the arrow and pressing
stopper ❸in the direction of arrow B(toward the
back of the arm).
3) To change over the feed scale mark from "small" to
"large", turn stitch dial
❶
while pressing stopper
❸
in the direction of arrow
B
(toward the back of the
arm).
4) Release stopper ❸ to x stitch dial ❶.
3-7. Adjusting the stitch length
AB
❸
❶
❷

❻
❽
– 17 –
3-8. Changing the sewing speed
The sewing speed can be changed with ❻on the normal sewing screen.
[How to change the sewing speed]
1) The sewing speed change screen is dis-
played by pressing ❻on the
normal sewing screen. On the sewing
speed change screen, the sewing speed
can be changed.
2) Press ❽to determine the set val-
ue. Then, the sewing machine returns to
the normal sewing state.