JUKI SC-921 User manual

SC-921
INSTRUCTION MANUAL

i
CONTENTS
I. SPECIFICATIONS........................................................................................ 1
II. SET-UP........................................................................................................ 1
1. Installing to the table.............................................................................................................................. 1
2. Installing the control panel.................................................................................................................... 3
3. Connecting the cords............................................................................................................................. 4
4. Attaching the connecting rod.............................................................................................................. 12
5. Setting procedure of the machine head ............................................................................................. 13
6. Adjusting the machine head (direct-drive motor type sewing machine only) ................................ 14
III. FOR THE OPERATOR............................................................................. 15
1. Operating procedure of the sewing machine.....................................................................................15
2. Operation panel (CP-18)....................................................................................................................... 16
3. Operating procedure of the sewing pattern.......................................................................................17
(1) Reverse feed stitching pattern.............................................................................................................. 17
(2) Overlapped stitching pattern ................................................................................................................ 18
4. One-touch setting.................................................................................................................................19
5. Production support function ............................................................................................................... 20
6. Setting of functions of SC-921 ........................................................................................................... 23
7. Function setting list.............................................................................................................................. 24
8. Detailed explanation of selection of functions ..................................................................................28
9. Automatic compensation of neutral point of the pedal sensor........................................................ 38
10. Selection of the pedal specications..................................................................................................38
11. Setting of the auto lifter function ........................................................................................................ 39
12. Selecting procedure of the key-lock function.................................................................................... 40
13. Connection of the pedal of standing-work machine ......................................................................... 40
14. External input / output connector ....................................................................................................... 41
15. Connection of the material end sensor .............................................................................................. 42
16. Initialization of the setting data ...........................................................................................................43
IV. MAINTENANCE....................................................................................... 43
1. Removing the rear cover......................................................................................................................43
2. Replacing the fuse................................................................................................................................44
(1) PWR PCB ................................................................................................................................................ 44
(2) CTL PCB.................................................................................................................................................. 45
3. Error codes............................................................................................................................................45

I. SPECIFICATIONS
II. SET-UP
Supply voltage Single phase 100 to 120V 3-phase 200 to 240V Single phase 220 to 240V
Frequency 50Hz/60Hz 50Hz/60Hz 50Hz/60Hz
Operating envi-
ronment
Temperature : 0 to 40˚C
Humidity : 90% or less
Temperature : 0 to 40˚C
Humidity : 90% or less
Temperature : 0 to 40˚C
Humidity : 90% or less
Input 450VA 450VA 450VA
SC-921 control box
1. Installing to the table
* The instructions apply to the case the control box is installed on the table of the MF-7800D.
To use any other machine head, install the control box on the table referring to the Instruction Manual
for the main body of the relevant sewing machine.
1) Install control box ❷and sensor bracket ❸ on the table with tting bolt asm. ❶supplied with the unit
as accessories. At this time, insert supplied nuts and washers as shown in the gure so that the con-
trol box and sensor bracket are securely xed.
2) Install the control box (or the one equipped with a small sized motor unit) on the table. Then, install the
sewing machine head on the table. (Refer to the Instruction Manual for the sewing machine.)
3) Install the mounting plate on the CP-18 panel with four tapping screws ❹supplied with the unit.
At this time, take care not to allow the cable to be caught under the mounting bracket.
(To install the CP-18 on the table, install it as shown in Fig. A.)
4) Install CP-18 panel ❺and sensor bracket ❸on the table with wood screws ❻.
* The electric power is a reference value for the model equipped with the LH-3568A machine head.
It differs by the selected machine head.
SC-921 is a discrete control box and can
be used with the DD (direct-drive) system
sewing machine head.
Install the control box on the table accord-
ing to the instructions given below.
Fig. A ❶
❶
❷
❸
❻
❻
❺
❹
❻
Spring
washer
Convex
washer
Hexagonal
nut
– 1 –

– 2 –
[How to install the reactor box]
WARNING :
Be sure to install the reactor box after turning the power OFF.
* For the EU-type models, install the reactor box that is supplied with the sewing machine.
❽
󱢳
󱢴
❸
❶
A
B
C
❷ ❹
❻
❺
❼
❽
❽
❶
❾
󱢳
❸
1) Connect the terminals of power cord ❶of the
SC-921 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 ❺ to the power cord of SC-
921. 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.
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 󱢵at the posi-
tion that is approximately 200 mm away from
the front end of table stand.
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) Insert the connector of FAN cord 󱢶 to CN62
of the SC-921. (Refer to [Connection of the
reactor box fan cord] p.6.)
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.
Operator's side
Power box
󱢷
󱢶
200 mm
❼
SC-921
CN62
❶󱢴
Undersurface of table
󱢵
󱢶
󱢴
❼
SC-921 : CN62
←

2. Installing the control panel
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.
1) Remove side plate setscrews ❶from the side
plate.
❶
2) Install control panel ❷on the machine head using
screws ❺, at washers ❸and rubber seat ❹sup-
plied with the control panel as the accessories.
(Caution) 1. DDL-9000B (Not provided with AK)
is given as an example of installing
procedure.
2. Screw to install the panel changes
according to the machine head used.
Refer to Table 1 and conrm the kind
of screw.
❷
❹
❺
❸
< The relation between the respective machine heads and the positions of installing hole of the
bracket are as described in the table. >
Installing
hole Screw
DDL-9000B ① - ⑤
(Provided with AK)
M5 X 14 Side plate
setscrew
(Not provided with AK)
M5 X 12
LH-3500A ② - ⑤M5 X 14 Side plate
setscrew
DLN-9010 ② - ⑤3/16-28 L=12
Screw supplied
with panel as
accessories
DDL-8700
series ③ - ⑤3/16-28 L=12
Screw supplied
with panel as
accessories
DDL-5500
series *1 ③ - ⑤3/16-28 L=12
Screw supplied
with panel as
accessories
LZ-2280
series *1 ③ - ⑤11/64-40 L=7.8 Screws supplied with machine head
Table 1
*1 For the DDL-5556 and LZ-228*, the machine
head is supplied with an auxiliary bracket for
mounting the control panel as an accessory. Be
sure to install the bracket while referring to the
instruction manual for the machine head.
①②⑤ ⑥③ ④
(Caution) 1. Screws to be used for installing the panel differ with the machine head, i.e., screws supplied
with the panel as accessories and the side plate setscrews. Select appropriate screws/set-
screws referring to Table 1.
2. If the screw type is not correct, the tapped hole can be collapsed.
3. If you want to install the panel on the DDL-8700, be aware that the method to install it on the ma-
chine head differs depending on whether or not the machine head is provided with the AK device.
Machine head with the AK device: Install the panel on the head bracket supplied with the AK.
(The auxiliary bracket should be xed with the side plate setscrews.)
Machine head without the AK device: Remove the side plate setscrews and install the panel on
the side plate using the screws supplied with panel as accessories.
4. If you want to use the panel with the machine head for heavy-weight materials, install it re-
ferring to the "Supplementary Instructions" for the machine head.
– 3 –

WARNING :
• To prevent personal injury caused by abrupt start of the sewing machine, carry out the work after
turning OFF the power switch and a lapse of 5 minutes or more.
• To prevent damage of device caused by maloperation and wrong specifications, be sure to
connect all the corresponding connectors to the specied places.
• 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.
3. Connecting the cords
Following connectors are prepared on the SC-921. Connect the connectors coming from the machine head
to the corresponding places so as to t the devices mounted on the machine head.
❶ CN30 Motor signal connector
❷ CN38 Operation panel: Various kinds of sewing
can be programmed. (For details of the
operation panel other than CP-18, refer to
the Instruction Manual for the panel to be
used.)
❸ CN33 Synchronizer : It detects the needle bar
position.
❹ CN37 Presser foot lifting solenoid (Only for the
automatic presser foot lifter type)
❺ CN48 Safety switch (standard) : When tilting the
sewing machine without turning the power
OFF, the operation of the sewing machine
is prohibited so as to protect against dan-
ger.
OPTION switch: Input function can be
changed by changing over the internal
function with this switch.
❻ CN42 Thread trimming safety switch
❼ CN39 Standing machine pedal : JUKI standard
PK70, etc. Sewing machine can be con-
trolled with external signals.
❽ CN58 +24 V external power source
❾ CN57 Simplied production control counter input
󱢳 CN36 Machine head solenoid: Provided with
solenoids for thread trimming, reverse
feed stitching, one-touch type reverse feed
switch.
󱢴 CN54 Material end detection sensor, etc.
󱢵 CN51 Optional function/device input/output.
󱢶 CN56 Optional function/device output (solenoid
valve output).
󱢷 CN34 Pedal sensor: The pedal sensor supplied
with the SC-921 is to be connected to this
connector to operate the sewing machine.
󱢸CN62 Fan motor power supply (EU type only)
❽
󱢳❹ ❾❼❷❺❶
❸
❻
󱢴
󱢵 󱢸
󱢶
󱢷
– 4 –

3) Connect 14P code ❸coming
from the machine head to con-
nector ❻ (CN36).
4) Insert 3P cord ❾coming from
the machine head into con-
nector 󱢳 (CN42).
5) When the optional AK device
is attached, connect 2P con-
nector ❹ coming from the AK
device to connector ❼ (CN37).
6) Connect connector ❺coming from the motor to connector ❽ (CN30) on the circuit board.
7) Insert pedal sensor cable 󱢴into connector 󱢵 (CN34).
(Caution) 1. When using the AK device, set whether to use the AK device after conrming how to se-
lect the auto-lifter function. (Refer to “III-11. Setting of the auto lifter function” p.39.)
2. Be sure to securely insert the respective connectors after checking the inserting direc-
tions since all connectors have the inserting directions. (When using a type with lock, in-
sert the connectors until they go to the lock.) The sewing machine is not actuated unless
the connectors are inserted properly. In addition, not only the problem of error warning
or the like occurs, but also the sewing machine and the control box are damaged.
[Connecting the connector for the operation panel]
The connector for the operation panel is provided.
Paying attention to the orientation of the connector
󱢶, connect it to connector (CN38) 󱢷located on the
circuit board. After connecting, securely lock the con-
nector.
(Caution) Be sure to turn OFF the power before
connecting the connector.
1) Pass cords ❶of the thread trimming solenoid,
reverse-stitching solenoid, etc. and the cord from
the motor through hole Ain the table to route
them down under the machine table.
2) Loosen screw Bin cover ❷with a screwdriver to
open the cover.
❶ A
❼
❹
❺
❽
❸
❻
❾
󱢵󱢳
󱢴
󱢷
󱢶
– 5 –
❷
B

8) After inserting the connector, put all cords togeth-
er with cable clip band 󱢺located on the side of
the box.
(Caution) 1. Fix the cord clamp and the cable clip
band following the attaching proce-
dure.
2. When removing the connector,
remove it from the wire saddle and
remove it while pressing the hook of
the cable clip band.
How to x cable clip band 󱢺How to remove cable clip band
Pushing the hook portion, push the band to remove it.
Pull Push
Push the hook.
[Connection of the pedal of standing-work machine]
Connect the connector of PK70 󱢸to connector 󱢹
(CN39 : 12P) of SC-921 .
(Caution) Be sure to turn OFF the power before
connecting the connector.
Panel Panel
󱢺
󱢹
󱢸
Connect the connector of reactor box fan cord 󱣂to
connector 󱣃 (CN62 : 6P) of SC-921.
(Caution) Be sure to turn OFF the power before
connecting the connector.
[Connection of the reactor box fan cord]
󱣃
󱣂
– 6 –

9) Close cover ❷ and x the cover by tightening
screw Bwith a screwdriver.
(Caution) Take care not to allow the cord to be
caught under cover ❷.
10) Connect connector 4P 󱢻to connector
󱢼locat
ed
on the side of the box.
11) Connect motor outpu t cord 󱢽of the power switch
to connector 󱢾.
Connect motor output cord 󱢿to connector 󱣀locat-
ed on the side of the box.
CE 1ø 230V
AC
220V-240V
Installing power switch
Connect power supply cord to the power switch.
[CE specications]
Single phase 230V : Power supply cords : Brown, Blue,
and green/yellow (ground wire)
Brown
Blue
Green / Yellow
(ground wire)
[For CE specications only]
󱢿
󱣀
󱢼
󱢾
󱢻
󱢽
– 7 –
❷
B

[Changing over the voltage between 100 V and 200 V]
WARNING :
To prevent personal injuries caused by electric shock hazards or abrupt start of the sewing machine,
carry out the work after turning OFF the power switch and a lapse of 5 minutes or more. To prevent
accidents caused by unaccustomed work or electric shock, request the electric expert or engineer of
our dealers when adjusting the electrical components.
By making the following two changes, the SC-921
can be used with three different power supplies, i.e.,
single-phase 100 - 120 V, single-phase 200 to 240 V
and 3-phase 200 to 240 V.
* Only the control box which uses PWR-T PCB can
be changed.
①Replacement of the power cords
② Changing-round of connector ❶ on the PWR PCB
1) Turn OFF the power with the power switch after
checking that the sewing machine has stopped.
2) Draw out the power cord from the power recepta-
cle after checking that the power switch has been
turned OFF. Then wait for 5 minutes or more.
3) Loosen the screws which are used to secure the
rear lid of the control box cover. Carefully open
the rear cover.
4) Changing procedure of the power voltage
(Caution) If the supply power changing is carried
out in a wrong manner, the control box can
break. Be extremely careful when taking the
supply voltage changing procedure.
A. To change over the supply voltage from 200 -
240 V to 100 - 120 V
• Change the power cord with the JUKI genuine cord
with the part number (M90355800A0). Change
the earth cord with the one with the part number
(M90345800A0).
• Change over supply voltage changeover connector ❶
mounted on the PWR PCB with the connector for 100 V.
• Connect the crimp style terminal of AC input cord to
the power plug as shown in the gure A.
B,C. To change over the supply voltage from 100 -
120 V to 200 - 240 V
• Change the power cord with the JUKI genuine cord
with the part number (M90175800A0).
• Change over supply voltage changeover connector ❶
mounted on the PWR PCB with the connector for 200 V.
• Connect the crimp contact of the AC input cord
to the power plug as illustrated in Fig. B for the
3-phase power supply or as illustrated in Fig. C for
the single-phase one.
5) Before closing the rear lid of the cover, ascertain
again that the relevant parts have been correctly
changed without fail.
6) Close the read lid while pressing it, taking care not
to allow the wiring to be caught between the read lid
of the cover and the main body of the control box.
Then, secure the lid with the screws.
❶
1
2
3
Wiring for the 3-phase 200 V
A
B
C
* The illustration below shows the PWR-T PCB.
The type of PCB differs by destination.
(Plug side)
WHITE
BLACK
RED
GREEN/
YELLOW
WHITE
BLACK
GREEN/
YELLOW
(Plug side)
WHITE
BLACK
RED
GREEN/
YELLOW
WHITE
BLACK
RED
GREEN/
YELLOW
(Plug side)
WHITE
BLACK
RED
GREEN/
YELLOW
GREEN/
YELLOW
1
2
3
WHITE
BLACK
Wiring for the single-phase 100 V
Be sure to connect the wire between 1 and 2.
If it is connected between 1-3 or 2-3, the sewing
machine will be inoperative.
Wiring for the single-phase 200 V
Be sure to connect the wire between 1 and 2.
If it is connected between 1-3 or 2-3, the sewing
machine will be inoperative. (Caution) Be sure to remove the
connector while holding its
locking section with your
ngers. Be extremely care-
ful not to pull the connector
forcibly.
Locking section
(Box side)
(Box side)
(Box side) 1
2
3
– 8 –

Installing power switch
Connect power supply cord to the power switch.
[JA specications]
3-phase 220 V : Power supply cords : black,
white, red and green/yellow
(ground wire)
Single phase 120V : Power supply cords : black,
white, and green/yellow (ground
wire)
[In case of using the power switch for LA]
Connect motor output cord 󱢿to connector 󱣀locat-
ed on the side of the box.
JA 3ø 220V
AC
200V-240V
Black
Red
White
Green / Yellow
(ground wire)
JA 1ø 120V
AC
100V-120V
Black
White
Green / Yellow
(ground wire)
When the metallic conduit is used, be sure to change over the power cord section following the steps of
procedure described below.
(Caution) Be sure to carry out this procedure before installing the control box on the machine table.
1) Place the control box with its frame side down on
the machine table as illustrated in the sketch.
2) Loosen screw Bin underside cover Ato open
the cover.
A
B
3) Change over the cord shown in the red-line circle
following the steps of procedure described below.
󱢿
󱣀
– 9 –

4) Remove two screws
C
to remove clamping plate
D
from the main body of the control box.
5) Remove connector
E
while holding its locking
section
F
with your ngers.
6) Turn connector
G
to remove the cord locking
section.
7) Loosen nut
H
to remove the connector from
clamping plate
D
.
C
D
E
F
F
G
H
D
– 10 –

8) Put locknut
I
on the power cord and draw out
the cord
J
from inside clamping plate
D
.
9) Install clamping plate
D
back to the control box.
10) Pass power cord
J
through conduit
K
.
11) Fix conduit
K
with locknuts
I
with clamping
plate
D
placed between the locknuts.
12) Close underside cover
A
and secure the cover
with screw
B
.
A
B
I
D
J
K
I
ID
J
J
– 11 –

󱣁
Make sure that the power switch is turned OFF
and insert power supply cord coming from the
power switch into the power plug socket.
(Caution) 1. Top end of power supply cord varies
in accordance with destination or
supply voltage. Check again the sup-
ply voltage and the voltage designat-
ed on the control box when installing
the switch.
2. Be sure to prepare power plug 󱣁
conformed to the safety standard.
3. Be sure to connect the ground wire
(green / yellow).
󱣁
❶
❷
BA
❸
4. Attaching the connecting rod
1) Fix connecting rod ❶to installing hole Bof ped-
al lever ❷with nut ❸.
2) Installing connecting rod ❶to installing hole A
will lengthen the pedal depressing stroke, and
the pedal operation at a medium speed will be
easier.
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.
– 12 –

5. Setting procedure of the machine head
(Caution) For the operation panel other than CP-18, refer to the Instruction Manual for the operation
panel to be used for the setting procedure of the machine head.
1) Refer to “III-6. Setting of functions of
SC-921” p.23, and call the function
setting No. 95.
2) The type of machine head can be
selected by pressing switch ❺
( switch ❻).
* Refer to the "List of machine heads"
on the separate sheet or the Instruc-
tion Manual for the machine head of
your sewing machine for the type of
the machine head.
3) After selecting the type of machine
head, by pressing switch ❸
( switch ❹), the step proceeds
to 96 or 94, and the display automat-
ically changes to the contents of the
setting corresponding with the type
of machine head.
❻
❺❹❸
❻
❺❹❸
❻
❺❹❸
– 13 –

❻
❺❹❸
❻
❺❹❸
❻
❺❹❸
Ⓐ
6. Adjusting the machine head (direct-drive motor type sewing machine only)
(Caution) 1. When the slip between the marker dot on the handwheel and the concave of the cover is ex-
cessive after thread trimming, adjust the angle of the machine head by the operation below.
2. It is not necessary to adjust the machine head the part of which is connected to CN33.
(Refer to “II-3. Connecting the cords” p.4.)
1) Simultaneously pressing switch
❹and switch ❺, turn ON the
power switch.
2) is displayed ( Ⓐ) in the indi-
cator and the mode is changed over
to the adjustment mode.
3) Turn the pulley of the machine
head by hand until the main-shaft
reference signal is detected. At this
time, the degree of an angle from
the main-shaft reference signal is
displayed on the indicator Ⓑ.
(The value is the reference value.)
4) In this state, align marker dot ❼on the pulley
with recess ❽on the pulley cover.
The MF-7000 series has two marker lines.
* For the initial setting adjustment, upper marker
line ❼should be used. For the adjustment of
the thread trimming position, lower marker line
❾should be used in the case of the MF-7500
Series, and upper marker line ❼should be used
in the case of the MF-7900 series.
Ⓑ
5) Press switch ❻ to nish the
adjustment work. (The value is the
reference value.)
❼
❽
(MF series only)
❾
– 14 –

❶❷
❼
❷
III. FOR THE OPERATOR
1. Operating procedure of the sewing machine
1) Press ON button ❶of the power switch to turn
ON the power.
(Caution) If the power indication LED does not
light up even when turning ON the power
switch, immediately turn OFF the power
switch and check the voltage.
In addition, in such a case as this, re-turn
ON the power switch when 2 to 3 min-
utes or more have passed after turning
OFF the power switch.
2) When the needle bar is not in UP position, it automatically turns to the UP position.
(Caution) When turning ON the power for the rst time, there is the case where the timing is slightly re-
tarded to perform the initialization work. When turning ON the power, the needle bar moves. Do
not put your hands or things under the needle.
3) When depressing front part ❸of the pedal, the
sewing machine rotates at the number of revolu-
tions in accordance with the depressing amount.
When the pedal is returned to the neutral posi-
tion, the sewing machine stops.
4) When lightly depressing back part ❹of the ped-
al, the presser goes up. (PFL type only)
5) When strongly depressing back part ❺of the
pedal, thread trimming is performed.
8) When sewing is completed, press OFF button ❷
of the power switch to turn OFF the power switch
after conrming that the sewing machine has
stopped.
7) For some types of the sewing machine heads, re-
verse feed is performed by pressing touch-back
switch ❼. (The gure given illustrates the case
of the DDL-9000B.)
❻
PFL KFL
Presser foot operation
by pedal Enabled Disabled
Pedal depressing depth
for thread trimming Deep Shallow
6) For some types of the sewing machine heads, it
is possible to program various sewing patterns,
using the operation panel, such as the reverse
feed stitching at sewing start and that at sewing
end. For the CP-18 ❻, refer to “III-3. Operating
procedure of the sewing pattern” p.17 for de-
tails. For the operation panel other than the CP-
18 ❻, refer to the individual Instruction Manual
for the operation panel to be used.
(The gure given illustrates the case of the DDL-
9000B.)
❹
❸
❺
– 15 –

❸
❶
ⒶⒷ
❹ ❺ ❻❷
Ⓒ
Ⓓ
❼
Ⓔ
2. Operation panel (CP-18)
❶ switch : Used for changing over effective/ineffective of the reverse feed stitching pattern.
❷ switch : Used for changing over effective/ineffective of the overlapped stitching pattern.
❸ switch : Used for conrming the contents of setting and for changing over effective/ineffective of
the reverse feed stitching at sewing start.
❹ switch : Used for selecting the process (A, B, C, D) the number of stitches for which is to be
changed.
* The selected process ashes on and off.
❺ switch : Used for changing the content of the selected display (ashing section) and for changing
over effective/ineffective of the reverse stitch at sewing end.
❻switch : Used for changing the content of the selected display (ashing section).
❼switch : Used to call the production support function or one-touch setting (by keeping the switch
held pressed for one second).
Indicators Ⓐand Ⓑ: Various pieces of information are displayed.
LED Ⓒ : Lights up when the reverse feed stitching pattern is effective.
LED Ⓓ: Lights up when the overlapped stitching pattern is effective.
LED Ⓔ: Lights up when the production support function is displayed.
– 16 –

❻
❺❹❸
❶Ⓑ
Ⓐ
❻
❺❹❸
❶
❷
❷❼
❼
Ⓒ
Ⓓ
Ⓒ
Ⓑ
Ⓐ
Ⓓ
3. Operating procedure of the sewing pattern
Without reverse
stitching :
Reverse
stitching :
Double reverse
stitching :
(Caution) 1. For the operation panel other than CP-18, refer to the Instruction Manual for the operation
panel to be used.
2. For some machine heads, reverse-stitching pattern cannot be used.
(1) Reverse feed stitching pattern
Reverse feed stitching at sewing start and reverse feed stitching at sewing end can be separately pro-
grammed.
[Setting procedure of the reverse feed
stitching]
1) Effective/ineffective of the re-
verse feed stitching pattern can be
changed over by pressing
switch ❶.
When the reverse feed stitching
pattern is rendered effective, LED Ⓒ
lights up, the number of stitches of
the reverse feed stitching at sewing
start is displayed on Ⓐ, and the
number of stitches of the reverse
feed stitching at sewing end is dis-
played on indicator Ⓑ.
2) When the number of reverse feed
stitches display is not ashing on
and off, every press on switch
❸changes over the reverse feed
stitching mode from the "reverse
feed stitching at sewing start," "dou-
ble reverse feed stitching at sewing
start" and "no reverse feed stitching
at sewing start."
In addition, every time switch ❺
is pressed, the reverse feed stitching
feature changes over from the re-
verse feed stitching at sewing end to
the double reverse stitch at sewing
end, then to no reverse feed stitch-
ing at sewing end, in turn.
Select a process (A, B, C or D) the number of stitches for which is to be changed by using switch ❹.
The number which is ashing on and off represents the process which is being set.
Change the number of stitches for the selected process by using switch ❺and switch ❻.
Press switch ❸ to conrm the change you have made. (The number of stitches that can be set is
0 to 15.)
(Caution) The sewing machine cannot perform sewing when the display of the number of stitches for
a process is ashing on and off.
– 17 –

❻
❺❹❸
❶
❷❼
Ⓒ
Ⓐ
Ⓓ
A : Number of stitches of normal stitching setting
0 to 15 stitches
B : Number of stitches of reverse stitching setting
0 to 15 stitches
C : Number of stitches of normal stitching setting
0 to 15 stitches
D : Number of times of repetition
0 to 9 times
(Caution) When process D is set to 5 times, the sewing is re-
peated as A→ B →C → B → C.
Ⓑ
(2) Overlapped stitching pattern
Overlapped stitching pattern can be programmed.
[Setting procedure of the overlapped
stitching]
1) Effective/ineffective of the over-
lapped stitching pattern can be
changed over by pressing
switch ❷.
When the overlapped stitching pat-
tern is rendered effective, LED Ⓓ
lights up.
2) Select a process (A, B, C or D) the
number of stitches for which is to be
changed by using switch ❹.
The number which is ashing on and
off represents the process which is
being set.
A
B
C
B
C
D
3) Change the number of stitches for the selected process by using switch ❺and switch ❻.
4) Press switch ❸ to conrm the change you have made.
(The sewing machine does not run unless the setting has been conrmed by pressing switch ❸.)
(Caution) The overlapped stitching pattern is carried out under automatic operation mode. Once the
pedal is depressed, the sewing machine will automatically perform sewing of the number of
overlapped stitches.
– 18 –