JUKI DDL-8700B-7 User manual

I
DDL-8700B-7
INSTRUCTION MANUAL

i
CONTENTS
I. SPECIFICATIONS........................................................................................ 1
II. SET-UP........................................................................................................ 3
1. Installation .........................................................................................................................................3
2. Installing the pedal sensor............................................................................................................... 4
3. Connecting the connector ............................................................................................................... 4
4. How to install the power plug .......................................................................................................... 5
5. Attaching the connecting rod .......................................................................................................... 5
6. Winding the bobbin thread .............................................................................................................. 6
7. Adjusting the height of the knee lifter.............................................................................................7
8. Installing the thread stand ............................................................................................................... 7
9. Lubrication ........................................................................................................................................8
10. Adjusting the amount of oil (oil splashes)......................................................................................8
11. Attaching the needle....................................................................................................................... 10
12. Setting the bobbin into the bobbin case ...................................................................................... 11
13. Adjusting the stitch length............................................................................................................. 11
14. Presser foot pressure..................................................................................................................... 11
15. Hand lifter ........................................................................................................................................ 11
16. Adjusting the height of the presser bar........................................................................................12
17. Threading the machine head ......................................................................................................... 12
18. Thread tension ................................................................................................................................13
19. Thread take-up spring .................................................................................................................... 13
20. Adjusting the thread take-up stroke ............................................................................................. 13
21. Needle-to-hook relationship .......................................................................................................... 14
22. Height of the feed dog .................................................................................................................... 14
23. Tilt of the feed dog.......................................................................................................................... 15
24. Adjusting the feed timing............................................................................................................... 15
25. Counter knife...................................................................................................................................16
26. Pedal pressure and pedal stroke................................................................................................... 16
27. Adjustment of the pedal ................................................................................................................. 17
28. Marker dots on the handwheel ...................................................................................................... 17
III. FOR THE OPERATOR............................................................................. 18
1. Operating procedure of the sewing machine............................................................................... 18
2. Setting procedure of the machine head .......................................................................................19
3. Operation panel built in the machine head ..................................................................................20
4. Operating procedure of the sewing pattern ................................................................................. 21
5. One-touch setting ........................................................................................................................... 23
6. Setting of functions ........................................................................................................................ 24
7. Production support function ......................................................................................................... 25
8. Function setting list........................................................................................................................ 27
9. Detailed explanation of selection of functions ............................................................................31
10. Automatic compensation of neutral point of the pedal sensor.................................................. 41
11. Selection of the pedal specications ............................................................................................42
12. Setting of the auto lifter function .................................................................................................. 42
13. Selecting procedure of the key-lock function .............................................................................. 43
14. Initialization of the setting data ..................................................................................................... 43
15. LED hand light.................................................................................................................................44
16. Height adjustable one-touch type reverse stitching switch ....................................................... 44
IV. MAINTENANCE....................................................................................... 45
1. Adjusting the machine head .......................................................................................................... 45
2. Error codes...................................................................................................................................... 46

– 1 –
I. SPECIFICATIONS
S : Light- to Medium-weight materials
H : Heavy-weight materials
• The sewing speed preset at the time of shipping : 4,000sti/min.
*1 : Needle used depends on the destination.
Supply voltage 3-phase 200 to 240V Single phase 220 to 240V
Frequency 50Hz/60Hz 50Hz/60Hz
Operating environ-
ment
Temperature : 5 to 35˚C
Humidity 35 - 85 % or less
Temperature : 5 to 35˚C
Humidity 35 - 85 % or less
Input 210VA 210VA
DDL-8700B - 7
Noise
- Equivalent continuous emission sound pressure level (LpA) at the workstation :
A-weighted value of 79.5 dB; (Includes KpA = 2.5 dB); according to ISO 10821- C.6.2 -ISO
11204 GR2 at 4,000 sti/min.
DDL-8700BS-7 DDL-8700BH-7
Application
Light- to Medium-weight materials Heavy-weight materials
S type H type
Light-weight materials Heavy-weight materials
(Schematic drawing of the applicable range)
Max. sewing speed 5,000 sti/min 4,000 sti/min
Thread trimming speed 300 sti/min 300 sti/min
Stitch length 4 mm 5 mm
Presser foot lift (by knee
lifter) 13 mm 13 mm
Needle *1 DB x 1 (#14) #9 to 18 DB x 1 (#21) #20 to 23
Lubricating oil JUKI MACHINE OIL #7 JUKI MACHINE OIL #7

– 2 –
DRAWING OF TABLE
A
B
C
D
E
F
H
G
I
A4xø3.4 on the bottom surface, depth 20 (Drill a hole at the time of set-up.) BInstalling position of drawer stopper (on the reverse side) Cø18 drilled hole D3xø13 drilled hole E2xø3.5, depth 10 F2xø3.5, depth 10 Gø40±0.5 drilled hole Hø16 depth 30 IC1.5 to C2.5 (hinge side only)

– 3 –
II. SET-UP
1. Installation
1) Carry the sewing machine with two persons as
shown in the gure above.
2) Do not put protruding articles such as the screw-
driver and the like at the location where the
sewing machine is placed.
3) Adjust so that the oil pan is supported at the four
corners of the table. Mount rubber hinge seat ❽
on the table and x it on the table with a nail.
4) Two rubber seats ❶for supporting the head por-
tion on the operator side A are xed on the ex-
tended portion of the table by hitting the nail ❷,
and the other two rubber cushion seats ❸on the
hinge side B are xed by using a rubber-based
adhesive. Then, oil pan ❹is placed.
5) Fit knee lifter pressing rod ❻. Fit hinge ❼ into the opening in the machine bed, and t the machine head
to table rubber hinge ❽before placing the machine head on cushions ❾on the four corners.
6) Securely attach head support rod 󱢳to the table until it goes no further.
1. Be sure to install the machine head support bar supplied with the unit.
2. If a pair of scissors or the like is caught between the control box and the table, the control
box cover can break. To prevent such an accident, do not place anything on C section.
Do not hold the handwheel.
❼❽
❶❶
❸
❸
❽
󱢳
❶
❷
❹
❸
AB
19.5mm
23.5mm
❼
❻
❾
C

– 4 –
3. Connecting the connector
2. 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 perpendicu-
lar to the table.
2) After the completion of installation of the pedal
sensor on the table, place the sewing machine
head on the table.
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.
• As for the details of handling respective devices, read carefully the Instruction Manuals supplied
with the devices before handling the devices.
Do not insert the power plug into the wall
outlet.
Check to be sure that the power switch is
turned OFF.
1) Connect pedal sensor cable ❶ and AC input
cable ❷supplied with the machine to the control
box. For the connection ports of the cables, refer
to the connector layout drawing.
Be sure to fully insert the connectors into
the corresponding ports until they are
locked.
2) Draw out cable of the control box through cable
draw-out hole ❸to route it to the underside of
the sewing machine table.
3) Fix the pedal cable and AC input cable
with a staple.
Connector connection diagram
Pedal
AC power supply
❶
❸
Machine head
connector
Underside of the table
AC input cable
Pedal sensor cable Staples
Pedal sensor
Staples
Cable draw-out hole
Slack
❷
❶

– 5 –
5. Attaching the connecting rod
Fix connecting rod ❶to installing hole of pedal lever
❷with nut ❸.
❶
Blue
Brown
Green / Yellow
(ground wire)
4. 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 black, red and while wires (3 ø) and the
blue and brown wires (1 ø) 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.
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 off and a lapse of 5 minutes or more.
3ø 200-240V
Black
Red
White
Green / Yellow
(ground wire)
AC
200-240V
AC
220-240V
1ø 220-240V
(For CE)
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 spec-
ication indicated on the control box.
* The power plug ❶is different in shape ac-
cording to the destination of the sewing
machine.
❶
❷❸
❸

– 6 –
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
following the order as shown in the gure on the
left. Then, wind clockwise the end of the bobbin
thread on the bobbin several times.
(In case of the aluminum bobbin, after winding
clockwise the end of the bobbin thread, wind
counterclockwise the thread coming from the
bobbin thread tension several times to wind the
bobbin thread with ease.)
3) Press the bobbin winder trip latch ❷in the direc-
tion of Aand start the sewing machine. The bob-
bin rotates in the direction of Cand the bobbin
thread is wound up. The bobbin winder spindle ❶
automatically 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 bobbin
thread, loosen setscrew ❹and move bobbin
winding lever ❷to the direction of Aor B. Then
tighten setscrew ❹.
To the direction of A: Decrease
To the direction of B: Increase
6. Winding the bobbin thread
6) In case that the bobbin thread is not wound evenly on the bobbin, loosen screw ❺and adjust the height
of bobbin thread tension ❽.
• 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 Dwhen the winding amount of the bobbin
thread on the lower part of the bobbin is excessive and to the direction Ewhen 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 ❻is 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.
D
E
B❸
❶
❻
❼
❻
❺
❻
A
C
❽
❹
❷

– 7 –
1) The standard height of the presser foot lifted
using the knee lifter is 10 mm.
2) You can adjust the presser foot lift up to 13 mm
using knee lifter adjust screw ❶.
3) When you have adjusted the presser foot lift
to over 10 mm, be sure that the bottom end of
needle bar ❷in its lowest position does not hit
presser foot ❸.
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
7. Adjusting the height of the knee lifter
8. Installing the thread stand
1) Assemble the thread stand unit, and insert it in
the hole in the machine table.
2) Tighten nut ❶.
❶
❷
❸
❶

– 8 –
① Amount of oil (oil splashes) conrmation paper ② Position to conrm the amount of oil (oil splashes)
Closely t the paper against the wall
surface of the bed.
Oil splashes conrmation paper
3 - 10 mm
25 mm
70 mm
* When carrying out the procedure described below in 2), remove the slide plate and take extreme caution
not to allow your ngers to come in contact with the hook.
1) If the machine has not been sufciently warmed up for operation, make the machine run idle for approxi-
mately three minutes. (Moderate intermittent operation)
2) Place the amount of oil (oil spots) conrmation paper under the hook immediately after the machine stops
running.
3) Conrm the height of the oil surface in the oil reservoir is within the range between “HIGH” and “LOW”.
4) Conrmation of the amount of oil should be completed in ve seconds. (Check the period of time with a
watch.)
WARNING :
Be extremely careful about the operation of the machine since the amount of oil has to be checked
by turning the hook at a high speed.
10. Adjusting the amount of oil (oil splashes)
(1) Conrmation of the amount of oil in the hook
9. Lubrication
1) Before starting the sewing machine, ll oil pan ❶
with JUKI MACHINE OIL #7 up to “HIGH” mark
A.
2) Add oil before the oil surface comes down to
reach the “LOW” mark B.
3) When you operate the machine after lubrication,
you will see splashing oil through oil sight window
❷if the lubrication is adequate.
4) Note that the amount of the splashing oil is unre-
lated to the amount of the lubricating oil.
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 lubrication, purchase JUKI NEW DEFRIX OIL No. 1 (Part No. : MDFRX1600C0) or
JUKI MACHINE OIL #7 (Part No. : MML007600CA).
3. Be sure to lubricate clean oil.
4. When the oil surface is lower than the LOW mark, the oiling may be inconsistent. To prevent
inconsistent oiling, add oil before the oil surface comes down to reach the LOW mark.
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. If oil is mistakenly swallowed, diarrhea or vomitting may occur. Put oil in a place where children
cannot reach.
❶
A
B
❷

– 9 –
1) The amount of oil shown in the samples on the
left should be nely adjusted in accordance with
sewing processes. Be careful not to excessively
increase/decrease the amount of oil in the hook.
(If the amount of oil is too small, the hook will be
seized (the hook will be hot). If the amount of oil
is too much, the sewing product may be stained
with oil.)
2) Check the oil amount (oil splashes) three times
(with three sheets of paper).
Splashes of oil from the hook
1 mm
Appropriate amount of oil (large)
Appropriate amount of oil (small)
1) Turning the oil amount adjustment screw at-
tached on the hook driving shaft front bushing in
the “+” direction (in direction A) will increase the
amount of oil (oil spots) in the hook, or in the “–”
direction (in direction B) will decrease it.
2) After the amount of oil in the hook has been
properly adjusted with the oil amount adjustment
screw, make the sewing machine run idle for
approximately 30 seconds to check the amount
of oil in the hook.
A
B
(2) Adjusting the amount of oil (oil spots) in the hook
(3) Sample showing the appropriate amount of oil in the hook
2 mm
Splashes of oil from the hook
①Amount of oil (oil splashes) conrmation paper
② Position to conrm the amount of oil
(oil splashes)
Oil splashes
conrmation paper
25 mm
70 mm
(4) Conrmation of the amount of oil supplied to the face plate parts
* When carrying out the work described below in
2), remove the face plate and take extreme cau-
tion not to allow your ngers to come in contact
with the thread take-up lever.
1) If the machine has not been sufciently warmed
up for operation, make the machine run idle for
approximately three minutes. (Moderate intermit-
tent operation)
2) Place the amount of oil (oil spots) conrmation
paper under the hook immediately after the ma-
chine stops running.
3) Conrm the height of the oil surface in the oil
reservoir is within the range between “HIGH” and
“LOW”.
4) The time required for the conrmation of the
amount of oil (oil splashes) should be completed
in ten seconds. (Measure the period of time with
a watch.)

– 10 –
1) Adjust the amount of oil supplied to the thread
take-up and needle bar crank ❷by turning adjust
pin ❶.
2) The minimum amount of oil is reached when
marker dot Ais brought close to needle bar
crank ❷by turning the adjust pin in direction B.
3) The maximum amount of oil is reached when
marker dot Ais brought to the position just
opposite from the needle bar crank by turning the
adjust pin in direction C.
Minimum
Maximum
❶
❷
A
B
C
❶
(6) Sample showing the appropriate amount of oil supplied to the face plate parts
1) The state given in the gure shows the appropri-
ate amount of oil (oil splashes). It is necessary to
nely adjust the amount of oil in accordance with
the sewing processes. However, do not exces-
sively increase/decrease the amount of oil in the
hook. (If the amount of oil is too small, the face
plate parts will be hot or seize. If the amount of oil
is too much, the sewing product may be stained
with oil.)
2) Check the oil amount (oil splashes) three times
(with three sheets of paper).
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
direction 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.
4) Securely tighten screw ❷.
5) Check that long groove Cof the needle is facing
exactly to the left in direction D.
When polyester lament thread is used, if the indented part of the needle is tilted toward opera-
tor's side, the loop of thread becomes unstable. As a result, hangnail of thread or thread break-
age may occur. For the thread that such phenomenon is likely to occur, it is effective to attach
the needle with its indented part slightly slanting on the rear side.
11. Attaching the needle
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
S plashes of oil from the thread take-up lever
1 mm
Appropriate amount of oil (large)
Appropriate amount of oil (small)
2 mm
S plashes of oil from the thread take-up lever
(5) Adjusting the amount of oil supplied to the face plate parts
❶
❷
C
DB
A

– 11 –
1) Pass the thread through thread slit A, and pull
the thread in direction C. By so doing, the thread
will pass under the tension spring and come out
from notch B.
2) Check that the bobbin rotates in the direction of
the arrow when thread is pulled.
29 to 32 mm
12. Setting the bobbin into the bobbin case
13. Adjusting the stitch length
14. Presser foot pressure
15. Hand lifter
* The dial calibration is in millimeters (reference
value).
1) Turn stitch length dial ❶in the direction of the
arrow, and align the desired number to marker
dot Aon the machine arm.
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 pressure regulating thumb
screw is 29 to 32 mm.
1) The presser foot is lifted by moving the lever
upward.
2) The presser foot is lowered by moving the lever
downward.
❷
❶
A
B
A
❶
B
C
A

– 12 –
1) Loosen setscrew ❶, and adjust the presser bar
height or the angle of the presser foot.
2) After adjustment, securely tighten the setscrew
❶.
❶
16. Adjusting the height of the presser bar
17. Threading the machine head
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
In the case the thread clamp is used.

– 13 –
(1) Changing the stroke of thread take-up
spring ❶
1) Loosen setscrew ❷.
2) As you turn tension post ❸clockwise (in direc-
tion A), the stroke of the thread take-up spring
will be increased.
3) As you turn tension post ❸counterclockwise (in
direction B), the stroke will be decreased.
(2) Changing the pressure of thread take-up
spring ❶
1) Loosen setscrew ❷, and remove thread tension
asm. ❺.
2) Loosen setscrew ❹.
3) As you turn tension post ❸clockwise (in direc-
tion A), the pressure will be increased.
4) As you turn the tension post counterclockwise (in
direction B), the pressure will be decreased.
1) When sewing heavy-weight materials, move
thread guide ❶to the left (in direction A) to
increase the length of thread pulled out by the
thread take-up.
2) When sewing light-weight materials, move thread
guide ❶to the right (in direction B) to decrease
the length of thread pulled out by the thread take-
up.
3) Normally, thread guide ❶is positioned in a way
that marker line Cis aligned with the center of
the screw.
(1) Adjusting the needle thread tension
1) The length of thread remaining at the needle tip
after thread trimming is shortened by turning ten-
sion regulating nut No. 1 ❶clockwise in direction
A.
2) It is lengthened by turning the nut counterclock-
wise in direction B.
3) The needle thread tension is increased by turning
tension regulating nut No. 2 ❷clockwise in direc-
tion C.
4) It is decreased by turning the nut counterclock-
wise in direction D.
(2) Adjusting the bobbin thread tension
1) The bobbin thread tension is increased by turning
tension regulating screw ❸clockwise in direction
E.
2) It is decreased by turning the screw counterclock-
wise in direction F.
18. Thread tension
19. Thread take-up spring
20. Adjusting the thread take-up stroke
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
❶
❷
❸
❹
❺
❶
B
A
❶
C
B
A
A
B
C
D
EF
❶
❷
❸

– 14 –
To adjust the height of the feed dog :
1) Loosen screw ❷of crank ❶.
2) Move the feed bar up or down to make adjust-
ment.
3) Securely tighten screw ❷.
If the clamping pressure is insufcient,
the motion of the forked portion becomes
heavy.
Adjust the timing between the needle and
the hook as follows :
1) Turn the handwheel to bright the needle bar
down to the lowest point of its stroke, and loosen
setscrew ❶.
Adjusting the needle bar height.
2) Align marker line Aon needle bar ❷with the
bottom end of needle bar lower bushing ❸, then
tighten setscrew ❶.
Adjusting position of the hook a.
3) Loosen the three hook setscrews, turn the
handwheel and align marker line Bon ascending
needle bar ❷with the bottom end of needle bar
lower bushing ❸.
4) After making the adjustments mentioned in the
above steps, align hook blade point ❺with the
center of needle ❹. Provide a clearance of 0.04
mm to 0.1 mm (reference value) between the
needle and the hook, then securely tighten set-
screws in the hook.
If the clearance between the blade point
of hook and the needle is smaller than the
specied value, the blade point of hook
will be damaged. If the clearance is larg-
er, stitch skipping will result.
0.75 to 0.85 mm
21. Needle-to-hook relationship
22. Height of the feed dog
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
❶
❷
0.04 to 0.1 mm
❷
❸
❹
❺
AB
A
B
a
❶

– 15 –
1) Loosen screws ❷and ❸in feed eccentric cam
❶, move the feed eccentric cam in the direction
of the arrow or opposite direction of the arrow,
and rmly tighten the screws.
2) For the standard adjustment, adjust so that the
top surface of feed dog and the top end of needle
eyelet are ush with the top surface of throat
plate when the feed dog descends below the
throat plate.
3) To advance the feed timing in order to prevent
uneven material feed, move the feed eccentric
cam in the direction of the arrow.
4) To delay the feed timing in order to increase
stitch tightness, move the feed eccentric cam in
the opposite direction from the arrow.
Be careful not to move the feed eccentric
cam too far, or else needle breakage may
result.
1) The standard tilt (horizontal) of the feed dog is
obtained when marker dot Aon the feed bar
shaft is aligned with marker dot Bon feed rocker
❶.
2) To tilt the feed dog with its front up in order to
prevent puckering, loosen the setscrew, and
turn the feed bar shaft 90˚ in the direction of the
arrow, using a screwdriver.
3) To tilt the feed dog with its front down in order to
prevent uneven material feed, turn the feed bar
shaft 90˚ in the opposite direction from the arrow.
Whenever the feed dog tilt is adjusted,
the feed dog height will be changed. So, it
is necessary to check the height after tilt
adjustment.
aFront up bStandard
cFront down dThroat plate
Standard feed timing
Advanced feed timing
Delayed feed timing
❶
❷
❸
23. Tilt of the feed dog
24. Adjusting the feed timing
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
❶
ABa
b
c
d

– 16 –
If the knife does not cut thread sharply, immediately
re-sharpen counter knife ❶as illustrated in Fig. A
and re-install it properly.
1) If the mounting position of the counter knife is
moved in direction Afrom the standard mounting
position, the thread length after thread trimming
will be increased accordingly.
2) If the mounting position is moved in direction B,
the thread length will be decreased accordingly.
aMoving knife bCenter of needle
cStandard : 4.0mm
❶
A
B
Fig. A
a
❶
b
c
(1) Adjusting the pressure required to
depress the front part of the pedal
1) This pressure can be changed by changing the
mounting position of pedaling pressure adjust
spring ❶.
2) The pressure decreases when you hook the
spring on the left side.
3) The pressure increases when you hook the
spring on the right side.
(2) Adjusting the pressure required to
depress the back part of the pedal
1) This pressure can be adjusted using regulator
screw ❷.
2) The pressure increases as you turn the regulator
screw in.
3) The pressure decreases as you turn the screw
out.
(3) Adjusting the pedal stroke
1) The pedal stroke increases when you insert
connecting rod ❸into the right hole.
26. Pedal pressure and pedal stroke
25. Counter knife
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
When sharpening again the counter knife ❶, extra special care must be taken on the handling of
the knife.
❷
❸
❶

– 17 –
(1) Installing the connecting rod
1) Move pedal ❸to the right or left as illustrated
by the arrows so that motor control lever ❶and
connecting rod ❷are straightened.
(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 ❺.
27. Adjustment of the pedal
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
❶
❷
❺
❸
❹
28. Marker dots on the handwheel
❸(Red)
❷(White)
❶
The upper stop position of the needle bar is reached
when marker dot ❶on the cover is aligned with
white marker dot ❷on the handwheel.
The operating timing of the thread trimming cam is
when marker dot ❶on the cover is aligned with red
marker dot ❸on the handwheel.

– 18 –
1) Press the power switch ❶to turn the power ON.
The 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.
If the power indicator LED on the panel
does not light up after having turned ON
the power switch ❶, immediately turn
OFF the power switch ❶and check the
supply voltage.
In addition, in such a case as this, re-turn
ON the power switch ❶when 2 to 3 min-
utes or more have passed after turning
OFF the power switch.
2) When the power switch ❶is turned ON, the
sewing machine automatically turns to bring the
needle bar to its UP position in the case the nee-
dle bar is not in that position.
When turning ON the power, the needle
bar moves. Do not put your hands or
things under the needle.
3) The pedal is operated in the following four steps:
a. The machine runs at low sewing speed when you
lightly depress the front part of the pedal. ❷
III. FOR THE OPERATOR
1. Operating procedure of the sewing machine
5) When one-touch type reverse feed switch ❻is
pressed, the sewing machine performs reverse
feed stitching.
4) Reverse feed stitching at the beginning of sewing,
reverse feed stitching at the end of sewing and
various sewing patterns can be set on built-in panel
❺of the machine head.
b. The machine runs at high sewing speed when you further depress the front part of the pedal. ❷
(If the automatic reverse feed stitching has been preset, the machine runs at high speed after it completes
reverse feed stitching.)
c. The machine stops (with its needle up or down) when you reset the pedal to its original position.
d. The machine trims threads when you fully depress the back part of the pedal. ❹
* When the auto-lifer (AK device) is used, one more operating switch is provided between the sewing ma-
chine stop switch and thread trimming switch. The presser foot goes up when you lightly depress the back
part of the pedal ❸, and if you further depress the back part ❹, the thread trimmer is actuated.
6) When you have nished sewing, conrm rst that the sewing machine has stopped. Then, press the pow-
er switch ❶to turn the power OFF.
In the case the machine is not used for a long time, remove the power plug from the plug recep-
tacle.
❻
❸
❷
❹
1
4
2
0
3
❶
❺