Juki DDL-8000A User manual

Brand: Juki

Model: DDL-8000A

Category: Sewing machines

Type: 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

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

– 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

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 (L

) at the workstation:

A-weighted value of 78.7 dBA ; (Includes K

= 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 (L

) at the workstation:

A-weighted value of 82.0 dBA ; (Includes K

= 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

190

240

297

140

115

Ｒ20

（525.4） 520

154.6

（138.5）

68.5

±0.5

（172.5）

Q Q

Ｚ

Ｙ

279

±1

Ｒ18

R242.5

（15）

390

100

22.5

136

(22.5)

181

-1

110

(244)

R20

R22.5

R30

R18

R22.5

R10

R20

R22.5

1200

R22.5

535

R30

(591)

141

139

86.5

21.5

27.5

195

52.5

R27.5

360

810

40°

Ｒ2

Ｃ1

（6）

W-W

40°

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

±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

+0.5

S-S

±1

∅16

±0.5

∅26

Q-Q

±1

– 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

4×ø3.4 on the bottom surface, depth 20 (Drill a hole at the time of set-up.)

Installing position of drawer stopper (on the reverse side)

ø17 drilled hole

3×ø13 drilled hole

2×ø3.5, depth 10

Through hole

2×ø3.4 on the bottom surface, depth 10 (Drill a hole at the time of set-up.)

C1.5 to C2.5 (hinge side only)

❻

❹

❼

– 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

❹

should 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

❶

on side

(operator’s

side) using nails

❷

as illustrated above. Fix two

cushion seats

❸

on side

(hinged side) using a

rubber-based adhesive. Then place under cover

❹

on the xed seats.

3) Fit hinge

❼

into the opening in the machine bed,

and t the machine head to table rubber hinge

seat

❺

before placing the machine head on cush-

ions

❻

on the four corners.

❶

❸

❺

❶

❸

23.5 mm

19.5 mm

❶

❹

❸

❷

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

❹

to the table

until it goes no further.

2-4. Installing the pedal sensor

1) Install the pedal sensor to the table with mounting

screws

❶

supplied 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

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

❶

and AC input

cable

❷

coming from the electrical box to the

undersurface of the sewing machine table through

cable draw-out hole

❸

2) Connect pedal sensor cable

❶

and the connector

under the table.

3) Secure pedal sensor cable

❶

and AC

input cable

❷

with staples

❹

[EU-type models]

Install ring core

❺

For one ring core

❺

, clamp the pedal

sensor cable

❶

after 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

❶

on 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

❸

through the rear face of

the power switch. Bundle the cord with cable clip

band

❹

to 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

❶

of the

electrical box to reactor-box PCB asm.

❷

and

to reactor box mounting plate

❸

Connect brown wire

to the rst connector

and blue wire

to the third connector respec-

tively from the top of terminal block on the

reactor box PCB asm. using screws. Connect

green/yellow wire

to reactor box mounting

plate

❸

with earth setscrew

❹

2) Attach cable clip

❺

to 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

❽

to input/output cables

❶

and

❼

of the reactor box. Attach both

bushes in the same manner.

4) Attach reactor box cover

󱀓

to reactor box

mounting plate

❸

with four reactor-box cover

setscrews

❾

At this time, x cord bushes

❽

attached to

input/output cables

❶

and

❼

in 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

❶

and

❼

of 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

❶

❾

󱀓

❸

❾

❸

❶

❻

❷

❹

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

❶

coming 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

❹

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

❶

to installing hole of pedal lever

❷

with 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

❷

❶

❸

(Neutral

position)

– 10 –

2-11-1. Installing the connecting rod

1) Move pedal

❸

to the right or left as illustrated by

the arrows so that motor control lever

❶

and con-

necting rod

❷

are 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.

2) The machine runs at high sewing speed when

you further depress the front part of the pedal.

(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.

4) The machine trims threads when you fully depress

the back part of the pedal.

The presser foot goes up when you lightly depress the back part of the pedal

, 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

during 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

immediately after the machine started thread trimming action.

5) When you depress lightly the back part of pedal at its neutral position

before starting, the pedal is

brought to the rst presser lifting position

. When you depress the back part of pedal further, the pedal is

brought to the second presser lifting position

1) Lightly press the power switch

❶

by hand to turn

the power ON. Power switch

❶

is 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.

❷

❶

– 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

❶

with its

indented part

facing exactly to the right in direc-

tion

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

of the bob-

bin case, and pull the thread in direction

. By

so doing, the thread will pass under the tension

spring and come out from notch

4) Check that the bobbin rotates in the direction of

the arrow when thread is pulled.

5) Pinching latch

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

of the needle is facing exactly to the left in direction

❻

❼

❻

❺

❻

❽

❷

❹

❶

❸

– 14 –

1) Insert the bobbin deep into the bobbin winder

spindle

❶

until 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

❷

in the direction

and start the sewing machine. The bobbin

rotates in the direction of

and the bobbin thread

is wound up. The bobbin winder spindle

❶

auto-

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

❹

and move bobbin

winding lever

❷

to the direction of

. Then

tighten setscrew

❹

To the direction of

: Decrease

To the direction of

: Increase

6) In case that the bobbin thread is not wound evenly

on the bobbin, remove the handwheel, loosen

screw

❺

and 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

❻

to the direction of

when the winding amount of the bobbin

thread on the lower part of the bobbin is excessive and to the direction

when 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

❶

clockwise (in di-

rection

), to shorten the thread length remaining

on the needle after thread trimming or counter-

clockwise (in direction

), to lengthen the thread

length.

2) Turn thread tension nut

❷

clockwise (in direction

) to increase or counterclockwise (in direction

)

to reduce the needle thread tension.

3-5-2. Adjusting the bobbin thread tension

1) Turn tension adjusting screw

❸

clockwise (in

direction

) to increase or counterclockwise (in

direction

) to reduce the bobbin thread tension.

3-5. Thread tension

❸

❶

❷

(Note)

Do not pass this thread

through section

[S type] [H type]

[NB type] [0B type]

(Note)

Be sure to pass the thread

through the section

– 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

❶

clockwise (in direction

), the presser foot

pressure will be increased.

2) As you turn the presser spring regulator

❶

count-

er-clockwise (in direction

), the pressure will be

decreased.

3) After adjustment, tighten nut

❷

The standard value of the height

of presser spring

regulator

❶

is 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)

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

❶

in the direction of the

arrow, and align the desired number to marker dot

on the machine arm.

2) To change over the feed scale mark from "large"

to "small", turn stitch dial

❶

while pressing feed

lever

❷

in the direction of the arrow and pressing

stopper

❸

in the direction of arrow

(toward the

back of the arm).

To change over the feed scale mark from "small" to

"large", turn stitch dial

❶

while pressing stopper

❸

in the direction of arrow

(toward the back of the

arm).

4) Release stopper

❸

to x stitch dial

❶

3-7. Adjusting the stitch length

❸

❶

❷

❻

❽

– 17 –

3-8. Changing the sewing speed

The sewing speed can be changed with

❻

on the normal sewing screen.

[How to change the sewing speed]

1) The sewing speed change screen is dis-

played by pressing

❻

on the

normal sewing screen. On the sewing

speed change screen, the sewing speed

can be changed.

2) Press

❽

to determine the set val-

ue. Then, the sewing machine returns to

the normal sewing state.

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Juki DDL-8000A User manual

Brand: Juki

Model: DDL-8000A

Category: Sewing machines

Type: User manual

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Juki DDL-8000A User manual

Juki DDL-8000A User manual

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