JUKI SC-920 Instruction Manual

SC-920

INSTRUCTION MANUAL

I. SPECIFICATIONS ........................................................................................ 1

II. SET-UP ........................................................................................................ 1

1. Changing over the voltage between 100 V and 200 V ......................................................................... 2

2. Installing to the table .............................................................................................................................. 3

3. Installing the control panel .................................................................................................................... 5

4. Connecting the cords ............................................................................................................................. 6

5. Attaching the connecting rod ..............................................................................................................12

6. Setting procedure of the machine head ............................................................................................. 13

7. 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) ....................................................................................................................... 17

3. Operating procedure of the sewing pattern ....................................................................................... 18

(1) Reverse feed stitching pattern .............................................................................................................. 18

(2) Overlapped stitching pattern ................................................................................................................ 19

4. One-touch setting ................................................................................................................................. 20

5. Production support function ...............................................................................................................21

6. Setting of functions of SC-920 ............................................................................................................24

7. Function setting list ..............................................................................................................................25

8. Detailed explanation of selection of functions .................................................................................. 29

9. Automatic compensation of neutral point of the pedal sensor ........................................................ 39

10. Selection of the pedal specications ..................................................................................................39

11. Setting of the auto lifter function ........................................................................................................40

12. Selecting procedure of the key-lock function .................................................................................... 41

13. Connection of the pedal of standing-work machine .........................................................................41

14. External input / output connector .......................................................................................................42

15. Connection of the material end sensor ..............................................................................................43

16. Initialization of the setting data ........................................................................................................... 44

IV. MAINTENANCE ....................................................................................... 44

1. Removing the rear cover......................................................................................................................44

2. Replacing the fuse ................................................................................................................................ 45

(1) PWR PCB ................................................................................................................................................ 45

(2) CTL PCB .................................................................................................................................................. 46

3. Error codes............................................................................................................................................46

I. SPECIFICATIONS

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

Input 320VA 320VA 320VA

* The power consumption values shown in the above table are reference values in the case the main body of

the sewing machine used with the SC-920 is DDL-9000B.

The power consumption differs with the machine head to be selected.

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

II. SET-UP

SC-920 is a discrete control box and can be used with the DD (direct-drive) system sewing machine head.

To use a compact motor unit, the motor unit has to be installed on the table in prior to the installation of the con-

trol box on it. To connect the SC-920 to a compact motor, assemble them referring to "M92 SUPPLEMENTARY

SETUP INSTRUCTIONS".

In the case the SC-920 is used for the DD (direct-drive) type sewing machine head, install the control box on the

table following the instructions give below.

SC-920 control box

SC-920 control box (For installing the compact motor)

– 1 –

1. 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.

* The illustration below shows the PWR-T PCB.

The type of PCB differs by destination.

Wiring for the single-phase 100 V

(Box side)

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.

WHITE

BLACK

RED

GREEN/ YELLOW

YELLOW

WHITE BLACK

GREEN/

(Plug side)

Wiring for the 3-phase 200 V

(Box side)

WHITE

BLACK

RED

GREEN/ YELLOW

YELLOW

(Plug side)

WHITE BLACK RED

GREEN/

Wiring for the single-phase 200 V

(Box side)

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.

WHITE

BLACK

RED

GREEN/ YELLOW

WHITE BLACK

YELLOW

(Plug side)

GREEN/

❶

Depending on specications of the control box, the number of phases and the voltage of the power supply can be changed over among "single-phase 100 - 120 V," "single-phase 200 - 240 V" and "3-phase 200 - 240 V."

Replacement of the power cords

①

Changing-round of connector ❶ on the PWR PCB

②

1) Turn OFF the power with the power switch after checking that the sewing machine has stopped.

Draw out the power cord from the power receptacle after checking that the power switch has been turned OFF. Then wait for 5 minutes or more.

3) Loosen the screws which x the cover of the control box. Open the cover in a slow manner.

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

mounted on the PWR PCB with the

❶

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

mounted on the PWR PCB with the

❶

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 door, check to be sure again that the voltage has been changed without mistake.

6) Close the back lid and secure with the screws pressing the lid, while taking extra care to prevent the cord from being caught between the cover and the main body of the control box.

(Caution) Be sure to remove the connec-

tor while holding its locking

section with your ngers. Be

extremely careful not to pull

Locking section

the connector forcibly.

– 2 –

2. Installing to the table

In the case the SC-920 is used for the DD (direct-drive) type sewing machine head, install the control box on the

table following the instructions give below.

The description given below refers to the case the

SC-920 is installed on the table of the DDL-9000B. To

❶

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 the control box to the table with the tting

bolt (asm.) ❶ supplied with the unit as acces-

sories. At this time, insert the nut and washer

supplied with the unit as accessories as shown

in the gure so that the control box is securely

xed.

2) After having installed the control box (and the

compact motor) on the table, mount the sewing

machine head on the table. (Refer to the Instruc-

tion Manual for the sewing machine to be used.)

Plain washer

Spring washer

Hexagonal nut

– 3 –

[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.

❸

❽

❼

❾

❼

Undersurface of table

󱢳

󱢴

❸

❽

SC-920

❷ ❹

❺

❶

❾

󱢵

❶

󱢴

󱢳

❻

󱢴

❽

1) Connect the terminals of power cord ❶ of the

SC-920 to reactor-box PCB asm. ❷ and to

reactor box mounting plate ❸.

Connect brown wire A to the rst connector

and blue wire B to the third connector respec-

tively from the top of terminal block on the

reactor box PCB asm. using screws. Connect

green/yellow wire C to reactor box mounting

plate ❸ with earth setscrew ❹.

2) Attach cable clip ❺ to the power cord of SC-

920. 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

and ❼ of the reactor box.

❶

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 󱢵 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) 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.

Power box

Operator’s side

󱢷 ❼

200 mm

– 4 –

3. 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.

❶

❹

❸

❺

❷

1) Remove side plate setscrews ❶ from the side

plate.

2) Install control panel ❷ on the machine head using

screws ❺, at washers ❸ and rubber seat ❹ sup-

plied with the control panel as the accessories.

(Caution) 1. DDL-9000B (Not provided with AK) is

given as an example of installing proce-

dure.

2. Screw to install the panel changes

according to the machine head used.

Refer to Table 1 and conrm the kind of

screw.

< The relation between the respective machine heads and the positions of installing hole of the bracket are as described in the table. >

Table 1

① ② ⑤ ⑥③ ④

Installing

hole

(Provided with AK)

DDL-9000B

LH-3500A

DLN-9010

DDL-8700 series

DDL-5500 series

LZ-2280 series

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.

①

②

③

M5 X 14

⑤

(Not provided with AK) M5 X 12

- ⑤M5 X 14 Side plate setscrew

- ⑤3/16-28 L=12

- ⑤11/64-40 L=7.8

Screw

Side plate setscrew

Screw supplied with panel as accessories

Screws supplied with machine head

(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/setscrews 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 machine 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 sup-

plied with panel as accessories.

4. If you want to use the panel with the machine head for heavy-weight materials, install it referring to the "Supplementary Instructions" for the machine head.

– 5 –

4. Connecting the cords

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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.

The SC-920 is provided with the connectors listed below. Connect the sewing-machine connectors to the corresponding control-box connectors according to the devices installed on the sewing machine.

(Caution) FortheSC-920Series,themachineheadtobeusedwithistobeselectedinthecourseof

the function setting procedure. To prevent an insertion error, remove the resistor pack for the machine head selection before use.

󱢵

❻

󱢴

CN30 Motor signal connector

❶

CN38 Operation panel: Various kinds of sewing

❷

can be programmed. (For details of the operation panel other than CP-18, refer to the Instruction Manual for the panel to be used.)

CN33 Synchronizer : It detects the needle bar

❸

position.

CN37 Presser foot lifting solenoid (Only for the

❹

automatic presser foot lifter type)

CN48 Safety switch (standard) : When tilting the

❺

sewing machine without turning the power OFF, the operation of the sewing machine is prohibited so as to protect against danger.

❸

󱢶

❽

❹❾❼❷❺❶

󱢳

CN42 Thread trimming safety switch

❻

CN39 Standing machine pedal : JUKI standard

❼

PK70, etc. Sewing machine can be controlled with external signals.

CN58 +24 V external power source

❽

CN57 Simplied production control counter input

❾

CN36 Machine head solenoid: Provided with so-

󱢳

lenoids for thread trimming, reverse feed stitching, one-touch type reverse feed switch.

CN54 Material end detection sensor, etc.

󱢴

CN50 Optional function/device input/output.

󱢵

CN34 Pedal sensor: The pedal sensor supplied

󱢶

with the SC-920 is to be connected to this connector to operate the sewing machine.

– 6 –

❶

1) Pass cords ❶ of the thread trimming solenoid,

reverse-stitching solenoid, etc. and the cord from

the motor through hole A in the table to route them

down under the machine table.

❶

2) Loosen screw B in cover ❷ with a screwdriver to

open the cover.

❷

3) Connect 14P code ❸ coming from

the machine head to connector ❻

(CN36).

4) When the optional AK device is attached, connect 2P connector ❹ coming from the AK device to con-

nector ❼ (CN37).

5) Connect connector ❺ coming from

the motor to connector ❽ (CN30) on

❺

❽

❾

❼

❻󱢳

❹

❸

the circuit board.

6) Insert 4P cord ❾ coming from the ma-

chine head into connector 󱢳(CN48).

(Caution) 1. When using the AK device, set whether to use the AK device after conrming how to select

the auto-lifter function. (Refer to “III-11. Setting of the auto lifter function” p.40.)

2. Be sure to securely insert the respective connectors after checking the inserting directions

since all connectors have the inserting directions. (When using a type with lock, insert the

connectors until they go to the lock.) The sewing machine is not actuated unless the con-

nectors 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]

󱢵

󱢴

– 7 –

The SC-920 is provided with a connector for the op-

eration panel. Fully insert connector 󱢴 into connector

(CN38) 󱢵 on the PWB until it locks without fail while

carefully checking the orientation of connector 󱢴.

(Caution) Be sure to turn OFF the power before

connecting the connector.

[ Connection of the pedal of standing-work machine ]

Connect the connector of PK70 󱢶 to connector 󱢷

(CN39 : 12P) of SC-920.

󱢷

󱢶

󱢸

How to x cable clip band

Panel

(Caution) Be sure to turn OFF the power before

connecting the connector.

7) After inserting the connector, put all cords together

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 procedure.

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 remove cable clip band

Panel

Push the

hook.

Pushing the hook portion, push the band to remove it.

Pull

󱢺

󱢹

❷

󱢻

󱢼

Push

8) Close cover ❷ and x the cover by tightening screw

with a screwdriver.

(Caution) Take care not to allow the cord to be

caught under cover ❷.

󱢽

9) Connect connector 4P 󱢹 to connector 󱢺 locat

on the side of the box.

10) Connect motor

outpu

t cord 󱢻 of the power switch to

connector 󱢼.

11) Bundle the machine head cables with a cable clip

supplied with the operation panel at one location

󱢽

as shown in the gure.

– 8 –

3ø 200V-240V

1ø 100V-120V

220V-240V

Black

Red

White

Green / Yellow (ground wire)

Black

White

Green / Yellow (ground wire)

[For CE specications only]

AC 200V-240V

AC 100V-120V

AC 220V-240V

󱢾

12) Connect the power supply cord to the power plug

socket. Connect, as shown in the gure, the white

and black (and red) conductors or the brown and

blue conductors to the power supply side and the

green/yellow conductor to the grounding side.

(Caution) 1. Be sure to prepare the power plug

which conforms to the safety standard.

2. Be sure to connect the earth cable (green/yellow) properly.

Connect motor output cord 󱢾 to connector 󱢿 locat-

ed on the side of the box.

CE 1ø 230V

󱢿

Brown

Blue

Green / Yellow (ground wire)

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)

(Caution) 1. Be sure to prepare the power plug

which conforms to the safety standard.

2. Be sure to connect the earth cable (green/yellow) properly.

– 9 –

[In case of using the power switch for LA]

󱢾

󱢿

Connect motor output cord 󱢾 to connector 󱢿 located

on the side of the box.

3ø 220V

1ø 120V

Black

Red

White

Green / Yellow

(ground wire)

Black

White

Green / Yellow

(ground wire)

200V-240V

100V-120V

Installing power switch

Connect power supply cord to the power switch.

[LA 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)

(Caution) 1. Be sure to prepare the power plug

which conforms to the safety standard.

2. Be sure to connect the earth cable (green/yellow) properly.

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.

Place the control box with its frame side down on

①

the machine table as illustrated in the sketch.

Loosen screw B in underside cover A to open the

②

cover.

Remove two screws C to remove clamping plate D

④

from the main body of the control box.

– 10 –

Change over the cord shown in the circle following

③

the steps of procedure described below.

Remove connector E while holding its locking sec-

⑤

tion F with your ngers.

Turn connector G to remove the cord locking sec-

⑥

tion.

Loosen nut H to remove the connector from clamp-

⑦

ing plate D.

Put locknut I on the power cord and draw out the

⑧

cord J

from inside clamping plate D.

Install clamping plate D back to the control box.

⑨

Pass power cord J through conduit K.

⑩

Fix conduit K with locknuts I with clamping plate

⑪

placed between the locknuts.

Close underside cover A and secure the cover with

⑫

screw B.

󱣀

13) 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) Top end of power supply cord 󱣀 varies

in accordance with destination or supply

voltage. Check again the supply voltage

and the voltage designated on the con-

trol box when installing the switch.

– 11 –

5. Attaching the connecting rod

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.

❷

1) Fix connecting rod ❶ to installing hole B of pedal

lever ❷ with nut ❸.

2) Installing connecting rod ❶ to installing hole A will

lengthen the pedal depressing stroke, and the pedal

operation at a medium speed will be easier.

❹

❸

❺

❶

3) The pressure increases as you turn reverse de-

pressing regulator screw ❹ in, and decreases as

you turn the screw out.

(Caution) 1. If the screw is excessively loosened,

the spring will come off.

Loosen the screw to such an extent

that the top of the screw can be observed from the case.

2. Whenever you have adjusted the screw, be sure to secure the screw by tightening metal nut ❺ to prevent the screw from loosening.

– 12 –

6. 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

SC-920” p.24

“III-6. Setting of functions of

, and call the function

setting No. 95.

❺❹❸

❻

2) The type of machine head can be

selected by pressing switch ❺ (

switch ❻).

* Refer to the

"MACHINE HEAD LIST"

on the separate sheet or the Instruc-

tion Manual for the machine head of

your sewing machine for the type of

the machine head.

❺❹❸

❻

3) After selecting the type of machine

head, by pressing switch ❸ (

switch ❹), the step proceeds to

96 or 94, and the display automatically

changes to the contents of the setting

corresponding with the type of ma-

chine head.

❺❹❸

❻

– 13 –

7. Adjusting the machine head (direct-drive motor type sewing machine only)

(Caution) When the slip between the white marker dot on the handwheel and the concave of the cov-

er is excessive after thread trimming, adjust the angle of the machine head by the opera-

tion below.

Ⓐ

1) Simultaneously pressing switch

and switch ❺, turn ON the

❹

power switch.

2) is displayed (Ⓐ) in the indica-

tor and the mode is changed over to

the adjustment mode.

❺❹❸

❻

Ⓑ

3) Turn the pulley of the machine head

by hand until the main-shaft reference

signal is detected. At this time, the de-

gree of an angle from the main-shaft

reference signal is displayed on the in-

dicator Ⓑ. (The value is the reference

value.)

❺❹❸

❻

4) In this state, align the white dot ❼ of the handwheel

with the concave ❽ of the pulley cover as shown in

the gure.

❽

❼

5) Press switch ❻ to nish the

adjustment work. (The value is the ref-

erence value.)

❺❹❸

❻

– 14 –

III. FOR THE OPERATOR

1. Operating procedure of the sewing machine

1) Press ON button ❶ of the power switch to turn ON the power.

(Caution) If the power indicator LED on the panel

does not light up after having turned ON the power switch, immediately turn OFF the power switch and check the supply voltage. In addition, in such a case as

❶

2) When the needle bar is not in UP position, it auto-

matically turns to the UP position.

(Caution) When turning ON the power for the rst

3) The pedal is operated in the following four steps:

a. The machine runs at low sewing speed when you

❺

❹

❸

* 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 ❹, and if you further depress the back part ❺, 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 immediate-

ly following high or low speed sewing.

• The machine will completely perform thread trimming even if you reset the pedal to its neutral position im-

mediately after the machine started thread trimming action.

lightly depress the front part of the pedal.

b. The machine runs at high sewing speed when you

further depress the front part of the pedal. ❸

(If the automatic reverse feed stitching has been

preset, the machine runs at high speed after it com-

pletes 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.

this, re-turn ON the power switch when 2 to 3 minutes or more have passed after turning OFF the power switch.

time, there is the case where the timing

is slightly retarded to perform the ini-

tialization work. When turning ON the

power, the needle bar moves. Do not put

your hands or things under the needle.

❸

❺

PFL KFL

Presser foot operation by pedal Enabled Disabled

Pedal depressing depth for thread trimming Deep Shallow

– 15 –

❻

❼

4) 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 stitch-

ing at sewing start and that at sewing end. Refer to

“III-3. Operating procedure of the sewing pat-

tern” p.18

for details when using CP-18 ❻. For the operation panel other than CP-18 ❻, refer to the Instruction Manual for the operation panel to be used.

(The gure given illustrates the case of the DDL-

9000B.)

5) For some types of the sewing machine heads,

reverse feed is performed by pressing touch-back

switch ❼.

(The gure given illustrates the case of the DDL-

9000B.)

❷

6) 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.

– 16 –

2. Operation panel (CP-18)

❶

Ⓒ

Ⓓ

❸

switch : Used for changing over effective/ineffective of the reverse feed stitching pattern.

❶

switch : Used for changing over effective/ineffective of the overlapped stitching pattern.

❷

Ⓐ

❹ ❺ ❻❷

Ⓑ

Ⓔ

❼

switch : Used for conrming the contents of setting and for changing over effective/ineffective of the

❸

reverse feed stitching at sewing start.

switch : Used for selecting the process (A, B, C, D) the number of stitches for which is to be changed.

❹

* The selected process ashes on and off.

switch : Used for changing the content of the selected display (ashing section) and for changing over

❺

effective/ineffective of the reverse stitch at sewing end.

switch : Used for changing the content of the selected display (ashing section).

❻

switch : Used to call the production support function or one-touch setting (by keeping the switch held

❼

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.

– 17 –

3. Operating procedure of the sewing pattern

(Caution) For the operation panel other than CP-18, refer to the Instruction Manual for the operation

panel to be used.

(1) Reverse feed stitching pattern

Reverse feed stitching at sewing start and reverse feed stitching at sewing end can be separately programmed.

[Setting procedure of the reverse feed stitching]

1) Effective/ineffective of the reverse feed

stitching pattern can be changed over

by pressing switch ❶.

Ⓒ

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

❷

❺❹❸

❻

❼

sewing end is displayed on indicator

Ⓑ

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 ❺ and 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.

2) When the number of reverse feed

Ⓒ

❶

Ⓐ

Ⓑ

stitches display is not ashing on and

off, every press on switch ❸ changes over the reverse feed stitch-

Ⓓ

ing mode from the "reverse feed stitching at sewing start," "double reverse feed stitching at sewing start" and "no reverse feed stitching at sewing start."

❷

Without reverse stitching :

Double reverse stitching :

❺❹❸

❻

Reverse stitching :

❼

In addition, every time switch ❺

is pressed, the reverse feed stitching

feature changes over from the reverse

feed stitching at sewing end to the

double reverse stitch at sewing end,

then to no reverse feed stitching at

sewing end, in turn.

(Caution) For some types of the ma-

chine head, reverse feed

stitching patterns are not

available.

– 18 –

(2) Overlapped stitching pattern

Overlapped stitching pattern can be programmed.

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 repeat-

Ⓐ

Ⓒ

❶

ed as A → B → C → B → C.

[Setting procedure of the overlapped

Ⓑ

stitching]

1) Effective/ineffective of the overlapped

stitching pattern can be changed over

Ⓓ

by pressing switch ❷.

When the overlapped stitching pattern

is rendered effective, LED Ⓓ lights up.

2) Select a process (A, B, C or D) the

number of stitches for which is to be

❷

❺❹❸

❻

❼

changed by using switch ❹.

The number which is ashing on and

off represents the process which is be-

ing set.

3) Change the number of stitches for the selected process by using switch ❺ and 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.

– 19 –

4. One-touch setting

A part of function setting items can be easily changed in the normal sewing state.

(Caution) For the setting of functions other than those covered in this part, refer to

functions of SC-920” p.24

“III-6. Setting of

Ⓓ

Ⓒ

❷

❶

Ⓐ

❺❹❸

❻

Ⓔ

Ⓑ

❼

3) To return to the normal sewing state, press switch

(Caution) The setting is conrmed by pressing switch

Thread trimming function ( )

①

: Thread trimming operation is not performed (solenoid output prohibition: Thread trimmer, wiper)

: Thread trimming operation is effective.

Wiper function ( )

②

: Wiper does not operate after thread trimming : Wiper operates after thread trimming

❼

[One-touch setting procedure]

1) Keep switch

❼

one second to place the panel in the function setting mode.

2) Change over the item to be set by

using switch

❸

Then, the set value can be changed

by using

switch

❺

switch ❻.

❼

held pressed for

switch

and

❹

One-shot automatic stitching function ( )

③

One-shot automatic stitching function is ineffective.

One-shot automatic stitching is effective.

(Caution) This function is rendered effective when the material end sensor function is set. It is not

possible to prohibit the one-shot operation during overlapped sewing operation. The number of revolution is the value which is set for setting No. 38.

Setting of the max. speed of stitch ( )

④

The highest speed of stitch of the machine head is set. The upper limit of the set value differs with the type

of machine head to which the SC is connected.

Setting range : 150 - Max. value [sti/min]

Material end sensor function ( )

⑤

: Material end sensor function is ineffective.

: Once the material end is detected, the sewing machine stops running after having sewn the num-

ber of stitches set with

* This function is rendered effective when the material edge sensor is set up.

Thread trimming function by material end sensor ( )

⑥

( ).

⑦

: Automatic thread trimming function after the detection of material end is ineffective.

: Once the material end is detected, the sewing machine performs thread trimming after having

sewn the number of stitches set with ⑦ ( ).

* This function is rendered effective when the material edge sensor is set up.

Number of stitches for material end sensor ( )

⑦

The number of stitches to be sewn from the detection of material end to the stop of the sewing machine

Number of stitches that can be set: 0 to 19 (stitches)

(Caution) If the number of stitches specied is inadequate, the sewing machine can fail to stop within

the preset number of stitches depending on the number of revolutions of the sewing machine.

– 20 –

5. Production support function

The production support function consists of three different functions (six different modes) such as the production

volume management function, operation measuring function and bobbin counter function. Each of them has its

own production support effect. Select the appropriate function (mode) as required.

Production volume management function

■

Target No. of pcs. display mode [F100]

Target/actual No. of pcs difference display mode [F200]

The target number of pieces, actual number of pieces and the difference between the target and actual

number of pieces along with the operation time are displayed to notify the operators of a delay and advance

in real time. Sewing machine operators are allowed to engage sewing while constantly checking his/her

work pace. This helps raise target awareness, thereby increasing productivity. In addition, a delay in work

can be found at an early stage to enable early detection of problems and early implementation of corrective

measures.

Operation measuring function

■

Sewing machine availability rate display mode [F300]

Pitch time display mode [F400]

Average number of revolutions display mode [F500]

Sewing machine availability status is automatically measured and displayed on the control panel. The data

obtained can be used as basic data to perform process analyses, line arrangement and equipment efcien-

cy checkup.

Bobbin counter function

■

Bobbin counter display mode

In order to change bobbins before the current bobbin runs out of thread, the time for replacing the bobbin is

notied.

[To use the production support mode]

Ⓓ

Ⓒ

❷

❶

Ⓐ

❺❹❸

❻

Ⓑ

❼

(Caution) Modes F100 to F500 have been factory-set in the

OFF state at the time of delivery.

The mode state is changed over to ON/OFF

according to the setting of the bobbin thread

counter function (function setting No. 6).

Keep switch ❼ held pressed (one

second) in the normal sewing state to

call the one-touch setting screen.

Then, press switch ❶ or

switch ❷ to set each production support

mode in ON/OFF state to call the one-

touch setting screen.

Press switch ❸ or switch ❹ to

select the mode to be set in the ON/OFF

state.

ON/OFF of the display can be changed

over by pressing switch ❺ or

switch ❻.

To return to the normal sewing state,

press switch ❼.

– 21 –

Sewing can be performed with the production support data displayed on the control panel.

[Basic operation of the production support modes]

1) When switch ❼ is pressed in

the normal sewing state, LED Ⓔ lights

Ⓒ

❶

Ⓐ

Ⓑ

up to enter the production support

mode.

Ⓓ

2) Production support function can be

changed over by pressing switch

or switch ❹.

❸

❷

❺❹❸

❻

Ⓔ

❼

3) Data attached marked with (*1) in Table 1 "Indicator Ⓐ" can be changed by means of switch ❺ and

switch ❻.

4) When you keep switch ❻ held pressed for two seconds, indicator Ⓑ and LED Ⓔ ash on and off.

While they are ashing on and off, data marked with (*2) in Table 1 "Display under modes" can be changed

by pressing switch ❺ and switch ❻.

When you press switch ❼, the value marked with (*2) is conrmed and indicator Ⓑ and LED Ⓔ stop

ashing on and off.

5) The value with a sharp mark (*3) in Table 1 "Display of modes" can be changed only immediately after re-

setting by using switch ❺ and switch ❻.

6) Refer to the table "Mode resetting operation," for the resetting procedure of data.

7) To return to the normal sewing state, press switch ❼.

Data to be displayed under the respective modes are as described in the table below.

Table 1: Display of modes

Mode name Indicator

Target No. of pcs. display mode (F100)

Target/actual No. of pcs.

difference display mode

(F200)

Sewing machine availabili-

ty rate display mode (F300)

Pitch time display mode (F400)

Average number of revolu-

tions display mode (F500)

Bobbin counter display

mode

Actual number of pieces

(Unit : piece)

Difference between target

number of pieces and actual number of pieces

(d : piece) (*1)

oP-r Sewing machine availabili-

Pi-T Pitch time in the previous

ASPd Average number of rev-

bbn Bobbin counter value (*3) -

(*1)

Ⓐ

Indicator

Target number of pieces

(Unit : piece)

Target pitch time

(Unit : 100 msec) (*2)

ty rate in the previous sew-

ing (Unit : %)

sewing (Unit : 1sec)

olutions in the previous

sewing (Unit : sti/min)

Ⓑ

(*2)

Indicator Ⓑ (when

switch ❺ is pressed)

Display of average

availability rate of sewing

machine (Unit : %)

Display of average pitch time (Unit : 100 msec)

Display of average num-

ber of revolutions

(Unit : sti/min)

– 22 –

Table 2: Mode resetting operation

Mode name

Target No. of pcs. dis-

play mode (F100)

Target/actual No. of

pcs. difference display

mode (F200)

Sewing machine

availability rate display

mode (F300)

Pitch time display

mode (F400)

Average number of rev-

olutions display mode

(F500)

Bobbin counter display

mode

switch ❺ (held pressed for 2 seconds) switch ❺ (held pressed for 4 seconds)

Resets the actual number of pieces

Resets the difference between target num-

ber of pieces and actual number of pieces

Resets the actual number of pieces

Resets the difference between target num-

ber of pieces and actual number of pieces

Resets average availability rate of sewing

machine

Resets average pitch time Resets average availability rate of sewing

Resets average number of revolutions of

sewing machine.

Resets the bobbin counter value

(Note that only the bobbin counter is imme-

Resets average availability rate of sewing

machine.

Resets average pitch time.

Resets average number of revolutions of

sewing machine.

machine.

Resets average pitch time.

Resets average number of revolutions of

sewing machine. Resets average availability rate of sewing

machine.

Resets average pitch time.

Resets average number of revolutions of

sewing machine.

diately reset by pressing switch ❺.)

[Detailed setting of production volume management function (F101, F102)]

When switch ❼ is held pressed

❶

(for three seconds) under the target No.

of pcs. display mode (F100) or the target/

actual No. of pcs. difference display

mode (F200), the detailed setting of the

production volume management function

can be carried out.

The setting state of the number of times

of thread trimming (F101) and that of the

❷

❺❹❸

❻

Ⓔ

❼

target achievement buzzer (F102) can be

changed over by pressing switch ❸

or switch ❹.

The number of times of thread trimming for sewing one piece of garment can be set by pressing switch ❺

or switch ❻ in the setting state of the number of times of thread trimming (F101).

It is possible to set whether the buzzer sounds or not when the actual number of pieces has reached the target

volume by pressing switch ❺ or switch ❻ in the setting state of the target achievement buzzer (F102).

– 23 –

6. Setting of functions of SC-920

Functions can be selected and specied.

(Caution) For the function setting procedure of any operation panel other than CP-18, refer to the Instruction

Manual for the operation panel to be used.

1) Turn ON the power with switch

Ⓓ

Ⓒ

Ⓐ

❺❹❸

Ⓐ

❻

Ⓔ

❼

Ⓑ

held pressed.

❼

(The item which has been changed

during the previous work is displayed.)

* If the screen display does not change,

re-carry out operation described in

step 1).

(Caution) Be sure to re-turn ON the power

switch when one or more seconds have passed after turning it OFF. If the power switch is re-turned ON immediately after turning it OFF, the sewing machine may fail to operate normally. In such a case, be sure to turn ON the power switch again properly.

2) To move the setting No. forward, press

Ⓓ

Ⓒ

switch ❹. To move the setting

No. backward, press switch ❸.

(Caution)

❺❹❸

Ⓐ

❻

Ⓔ

❼

Ⓑ

If the setting No. is moved forward

(or backward), the previous (or subsequent) content of the setting is conrmed. Be careful when the content of a setting is changed (when

the

switch is touched).

Example)

Changing the maximum number of revolu-

tions (setting No. 96)

Press switch ❸ or switch ❹

to call setting No. "96."

The current set value is displayed on

indicator Ⓑ.

❺❹❸

❻

Ⓔ

❼

Press switch ❺ to change the

setting to "2500."

* The content of setting of the setting No. returns to the initial value by pressing switch ❺ and switch ❻

simultaneously.

After completion of the changing procedure, press switch ❸ or switch ❹ to conrm the updated value.

(Caution) If the power is turned OFF before carrying out this procedure, the changed content is not updated.

When switch ❸ is pressed, the display on the panel changes to the previous setting No. When

switch ❹ is pressed, the display on the panel changes to the subsequent setting No. After com-

pletion of the operation, the machine is returned to the normal sewing state by turning OFF the power

and re-turning it ON.

– 24 –

7. Function setting list

No. Item Description

1 Soft start function The number of stitches to be sewn at a low speed when the

2 Material end

sensor function

3 Thread trimming

function by material end sensor

4 Number of

stitches for material end sensor

5 Flicker reducing

function

6 Bobbin thread

counting function

7 Unit of bobbin

thread counting

down

8 Number of

rotation of reverse feed stitching

9 Thread trimming

prohibiting function

10 Setting of needle

bar stop position when the sewing

machine stops.

11 Operation

conrmation

sound for operation panel

12 Optional switch

function selection

13 Function of

prohibiting start of the sewing machine by bobbin thread

counter

14 Sewing counter Counting function of sewing (number of completion of process)

15 Thread wiping

function after thread trimming

21 Function of

automatic presser foot lifting at pedal's neutral position

22 Needle up/down

correction switch changeover function

* Do not change the set values with asterisk (*) mark as they are functions for maintenance. If the standard set value set at the

time of delivery is changed, it is in danger of causing the machine to be broken or the performance to be deteriorated. If it is necessary to change the set value, please purchase the Engineer’s Manual and follow the instructions.

soft-start function is used at the start of sewing.

0 : The function is not selected.

1 to 9 : The number of stitches to be sewn under the soft-

start mode.

Material end sensor function (to be used only with CP-18).

0 : Material end detection function is not operative. 1 : After detecting material end, the specied number of

stitches (No. 4) will be sewn, and the sewing machine will stop.

Thread trimming function by material end sensor (to be used only with CP-18).

0 : Automatic thread trimming function after detection of

material end is not operative.

1 : After detecting material end, the specied number of

stitches (No. 4) will be sewn, and the sewing machine will stop and perform automatic thread trimming.

Number of stitches for material end sensor (to be used only with CP-18). Number of stitches from detection of material end to stop of the sewing machine.

Flicker reducing function

0 : Flicker reducing function is not operative.

1 : Flicker reducing function is effective

Bobbin thread counting function

0 : Bobbin thread counting function is not operative. 1 : Bobbin thread counting function is operative.

Unit of bobbin thread counting down

0 : 1 Count/10 stitches 1 : 1 Count/15 stitches 2 : 1 Count/20 stitches 3 : 1 Count/thread trimming

Sewing speed of reverse feed stitching 150 to

Thread trimming prohibiting function (to be used only with CP-

18). 0 : Thread trimming is effective. 1 : Thread trimming is prohibited. (Output of solenoid is prohibited. : Thread trimmer and

wiper)

Position of needle bar is specied when the sewing machine stops.

0 : The needle bar stops at its lower position. 1 : The needle bar stops at its upper position.

Operation conrmation sound for operation panel

0 : Operation conrmation sound is not generated 1 : Operation conrmation sound is generated.

Switching of function of optional switch.

Function of prohibiting start of the sewing machine by bobbin thread counting

0 : When counting is out (-1 or less) Function of prohibiting

start of the sewing machine is not operative.

1 : When counting is out (-1 or less) Function of prohibiting

start of the sewing machine after thread trimming is oper-

ative.

2 : When counting is out (-1 or less), the sewing machine

stops once. Function of prohibiting start of the sewing machine after thread trimming is operative.

0 : Sewing counter function is not operative. 1 : Sewing counter function is operative. (Every time thread

trimming is performed)

2 : With the sewing counting switch input function

Thread wiping operation after thread trimming is specied.

0 : Thread wiping is not carried out after thread trimming 1 : Thread wiping is carried out after thread trimming

Function of lifting presser foot when the pedal is in neutral

position.

0 : Function of neutral automatic presser lifting is not opera-

tive.

1 : Selection of function of neutral presser lifting.

Function of the needle up/down correction switch is changed

over.

0 : Needle up/down compensation

1 : One stitch compensation

Setting

range

0 to 9

(stitches)

0/1

0 to 19

(stitches)

0/1

0 to 3

3,000

(sti/min)

0/1

0 to 2

0/1

Indication of function setting

8 1 9 0 0

1 0

1 1

1 2 o P T _

1 3

1 4

1 5

2 1

2 2

Ref.

page

– 25 –

No. Item Description

25 Thread trimming

operation after turning the handwheel by han

29 Setting of one-

touch type reverse feed solenoid pull-in time

30 Function of

reverse feed stitching on the way

31 Number of

stitches of reverse feed stitching on the way

32 Effective condition

of reverse feed stitching on the way when the sewing machine

is stopping.

33 Thread trimming

function by reverse feed stitching on the way

35 Number of

rotation at a low speed

36 Number of

rotation of thread trimming

37 Number of

rotation of softstart

38 One-shot speed One-shot speed (The max. value depends on the number of

39 Pedal stroke

at the start of rotation

40 Low speed

section of pedal

41 Starting position

of lifting presser foot by pedal

42 Starting position

of lowering presser foot

43 Pedal stroke 2 for

starting thread

trimming

44 Pedal stroke

for reaching the

maximum number

of rotation

45 Compensation of

neutral point of the pedal

47 Auto-lifter

selecting function

48 Pedal stroke 1 for

starting thread trimming

49 Lowering time of

presser foot

50 Pedal

specication

51 Compensation of

solenoid-on timing of reverse feed stitching at the start of sewing

* Do not change the set values with asterisk (*) mark as they are functions for maintenance. If the standard set value set at the

Thread trimming operation after moving the needle away from its upper or lower position by turning the handwheel by hand is

specied.

0 : Thread trimming operation is carried out after turning the

handwheel by hand

1 : Thread trimming operation is not carried out after turning

the handwheel by hand

This function sets the suction time of initial motion of back-tack

solenoid.

50 ms to 500 ms

Function of reverse feed stitching on the way

0 : Normal one-touch type reverse feed stitching function

1 : Function of reverse feed stitching on the way is opera-

tive.

Number of stitches of reverse feed stitching on the way.

Effective condition of reverse feed stitching on the way

0 : Function is not operative when the sewing machine

stops.

1 : Function is operative when the sewing machine stops.

Thread trimming function by reverse feed stitching on the way

0 : Automatic thread trimming function after completion of

reverse feed stitching on the way is not operative.

1 : Automatic thread trimming after completion of reverse

feed stitching on the way is performed.

Lowest speed by pedal (The MAX value differs by machine head.)

Thread trimming speed

(The MAX value differs by machine head.)

Sewing speed at the start of sewing (soft-start) (The MAX value differs by machine head.)

rotation of the sewing machine head.) Position where the sewing machine starts rotating from pedal

neutral position (Pedal stroke)

Position where the sewing machine starts accelerating from pedal neutral position (Pedal stroke)

Position where the cloth presser starts lifting from pedal neutral position (Pedal stroke)

Starting position of lowering presser foot Stroke from the neutral position

Position 2 where the thread trimming starts from pedal neutral position (When the function of lifting presser foot by pedal is provided.) (Pedal stroke) (Effective only when Item No. 50 is set at 1.)

Position where the sewing machine reaches its highest sewing speed from pedal neutral position (Pedal stroke) 10 to 150

Compensation value of the pedal sensor

Limitation time of waiting for lifting solenoid type auto-lifter

device

Position where thread trimming starts from pedal neutral position (Standard pedal) (Pedal stroke) (Effective only when Item No. 50 is set at 0.)

Sets the time required until the lowering of the presser foot is completed after a depress on the pedal

Type of pedal sensor is selected.

0 : KFL 1 : PFL

Refer to

p.39

Compensation of starting the solenoid for reverse feed

stitching when reverse feed stitching at the start of sewing is

performed.

“III-10. Selection of the pedal specications”

Setting

range

0/1

50 to 500

(ms)

0/1

0 to 19

(stitches)

0/1

150 to MAX

(sti/min)

100 to MAX

(sti/min)

100 to MAX

(sti/min)

150 to MAX

(sti/min)

10 to 50

(0.1 mm)

10 to 100

(0.1 mm)

– 60 to –10

(0.1mm)

8 to 50

(0.1 mm)

– 60 to –10

(0.1 mm)

–15 to 15

10 to 600

(second)

– 60 to – 10

(0.1 mm)

0 to 500

(10 ms)

0/1

– 36 to 36

(10°)

Indication of function setting

2 5

2 9

3 0

3 1

3 2

3 3

3 5

3 6

3 7

3 8 2 5 0 0

3 9

4 0

4 1

4 2

4 3

4 4

4 5

4 7

4 8

4 9

5 0

5 1

2 5 0

2 0 0

4 2 0

8 0 0

3 0

6 0

– 2 1

1 0

– 5 1

1 5 0

6 0

– 3 5

1 4 0

– 8

Ref.

page

– 26 –

No. Item Description

52 Compensation of

solenoid-off timing of reverse feed stitching at the start of sewing

53 Compensation

of solenoid-off timing of reverse feed stitching at the end of sewing

55 Foot lift after

thread trimming

56 Reverse

revolution to lift the needle after thread trimming

58 Function

of holding predetermined upper/lower position of the needle bar

59 Function of Auto/

Manual change-

over of reverse feed stitching at the start of sewing

60 Function of stop

immediately after reverse feed stitching at the start of sewing

64 Change-

over speed of condensation

stitch or EBT (end back tack)

70 Function of soft-

down of presser foot

71 Double reverse

feed stitching function

72 Sewing machine

startup selecting function

73 Retry function This function is used when needle cannot pierce materials .

74 With/without

thread trimmer for

76 One-shot function One-shot operation up to the material end is specied. (to be

84 Initial motion

suction time of

presser foot lifting solenoid

* Do not change the set values with asterisk (*) mark as they are functions for maintenance. If the standard set value set at the

Compensation of releasing the solenoid for reverse feed

stitching when reverse feed stitching at the start of sewing is

performed.

Compensation of releasing the solenoid for reverse feed

stitching when reverse feed stitching at the end of sewing is

performed.

Function of lifting presser foot at the time of (after) thread

trimming

0 : Not provided with the function of automatic lifting of

work-clamp after thread trimming

1 : Provided with the function of lifting presser foot automati-

cally after thread trimming

Function of reverse revolution to lift the needle at the time of

(after) thread trimming

0 : Not provided with the function of reverse revolution to lift

the needle after thread trimming

1 : Provided with the function of reverse revolution to lift the

needle after thread trimming

Function of holding predetermined upper/lower position of the needle bar

0 : Not provided with the function of holding predetermined

upper/lower position of the needle bar

1 : Provided with the function of holding predetermined

upper/lower position of the needle bar (holding force is weak.)

2 : Provided with the function of holding predetermined

upper/lower position of the needle bar (holding force is medium.)

3 : Provided with the function of holding predetermined

upper/lower position of the needle bar (holding force is strong.)

This function can specify the sewing speed of reverse feed

stitching at the start of sewing.

0 : The speed will depend on the manual operation by ped-

al, etc.

1 : The speed will depend on the specied reverse feed

stitching speed (No. 8).

Function at the time of completion of reverse feed stitching at the start of sewing

0 : Not provided with the function of temporary stop of the

sewing machine at the time of completion of reverse feed stitching at the start of sewing

1 : Provided with the function of temporary stop of the

sewing machine at the time of completion of reverse feed

stitching at the start of sewing.

Initial speed when starting condensation stitch or EBT

Presser foot is slowly lowered.

0 : Presser foot is rapidly lowered. 1 : Presser foot is slowly lowered.

Effective/ineffective of double reverse feed stitching is changed over. (to be used only with CP-18)

0 : Ineffective

1 : Effective

Current limit at the startup of sewing machine is specied.

0 : Normal (Current limit is applied during startup) 1 : Rapid (Current limit is not applied during startup)

0 : Retry function is not provided. 1 - 10 : Retry function is provided. 1: Needle-bar returning force before operating the retry

function: 1 (small) - 10 (large)

With/without thread trimmer for MF is selected.

0 : Not provided with the tread trimmer 1 : Provided with the thread trimmer

used only with CP-18)

0 : One-shot operation is not performed. 1 : One-shot operation is performed.

Suction motion time of presser foot lifting solenoid

Setting

range

– 36 to 36

(10°)

– 36 to 36

(10°)

0/1

0 to 3

0/1

0 to 250

(sti/min)

0/1

0 to 10

0/1

50 to 500

(ms)

Indication of function setting

5 2

5 3

5 5

5 6

5 8

5 9

6 0

6 4

7 0

7 1

7 2

7 3

7 4

7 6

8 4

1 0

1 5

1 8 0

1 4 0

Ref.

page

– 27 –

No. Item Description

87 Function of pedal

curve selection

90 Initial motion up

stop function

91 Function of

prohibiting compensation operation after turning handwheel by hand

92 Function of

reducing speed of reverse feed stitching at the start of sewing

93 Function added to

needle up/down compensating switch

94 Continuous +

One-shot nonstop function

95 Head selection

function

96 Max. number of

rotation setting

100 Number of

stitches sewn before thread clamp works at the beginning of sewing

103 Needle cooler

output OFF delay time

120 Main shaft

reference angle compensation

121 Up position

starting angle compensation

122 DOWN position

starting angle compensation

124 Setting of energy-

saving function during standby

* Do not change the set values with asterisk (*) mark as they are functions for maintenance. If the standard set value set at the

Pedal curve is selected. (Improving pedal inching operation)

Number of rotations

Automatic UP stop function is set immediately after turning ON the power.

0 : off 1 : on

It is effective in combination with the machine head provided

with tension release function.

0 : Tension release function is ineffective. 1 : Tension release function is effective. 0/1

Function to reduce speed at the time of completion of reverse

feed stitching at the start of sewing.

0 : Speed is not reduced. 1 : Speed is reduced.

Operation of needle up/down compensating switch is changed

after turning ON the power or thread trimming.

0 : Normal (needle up/down compensating stitching only)

1 : One stitch compensating stitching is performed only

when aforementioned changeover is made. (Upper stop / upper stop)

The function that does not stop the sewing machine by combining continuous stitching with one-shot stitching using the

program sewing function which is available in the IP operation panel.

0 : Normal (The sewing machine stops when a step is com-

pleted.)

1 : The sewing machine does not stop when a step is com-

pleted and proceeds to next step.

Machine head to be used is selected. (When the machine head is changed, each setting item is changed to the initial value of the machine head.)

Max. number of rotation of the sewing machine head can be set. (The MAX value differs by machine head.)

Sets the number of stitches to be sewn at the beginning of sewing before the thread clamp solenoid (CN36-7) starts operating

0 : Thread clamp solenoid does not operate.

1 to 9 : The number of stitches to be sewn before the thread

clamp solenoid operates

Delay time from the stop of sewing machine to the output OFF is specied using the needle cooler output function.

Main shaft reference angle is compensated.

Angle to detect UP position starting is compensated.

Angle to detect DOWN position starting is compensated.

Setting to reduce the power consumption while the sewing machine is in standby state

0 : Energy-saving mode is ineffective 1 : Energy-saving mode is effective

Pedal stroke

Setting

range

0/1/2

0/1

150 to MAX

(sti/min)

0 to 9

(stitches)

100 to 2000

(ms)

–60 to 60

–15 to 15

0/1

Indication of function setting

8 7

9 0

9 1

9 2

9 3

9 4

9 5 d L b M

9 6 4 0 0 0

1 0 0

1 0 3

1 2 0

1 2 1

1 2 2

1 2 4

5 0 0

– 2 3

Ref.

page

– 28 –

8. Detailed explanation of selection of functions

Selection of the soft-start function (Function setting No. 1)

①

The needle thread may fail to interlace with the bobbin thread at the start of sewing when the stitching pitch (stitch

length) is small or a thick needle is used. To solve such problem, this function (called “soft-start”) is used to limit

the sewing speed, thereby assuring successful formation of the starting stitches.

0 : The function is not selected. 1 to 9 : The number of stitches to be sewn under the soft-start mode.

1 0

The sewing speed limited by the soft-start function can be changed.

Data setting range

3 7 08 0

100 to MAX sti/min <10 sti/min> (The MAX value differs by machine head.)

Material end sensor function (Function setting No. 2 to 4, 76)

②

This function is possible when the material end sensor is attached.

For details, refer to

material end sensor.

(Caution) This function is rendered effective only with the CP-18.

Flicker reducing function (Function setting No. 5)

③

The function reduces ickering of the hand lamp at the start of sewing.

0 : Flicker reducing function is ineffective

1 : Flicker reducing function is effective

(Caution) When the icker reducing function is set at the "Flicker reducing function is effective," the startup

Bobbin thread counting function (Function setting No. 6)

④

When the control panel is used, the function subtracts from the predetermined value and indicates the used

amount of bobbin thread.

For the details, refer to the instruction manual for the control panel.

0 : Bobbin thread counting function is not operative.

1 : Bobbin thread counting function is operative.

(Caution) If “0” is set, the LCD indication on the control panel will go out and the bobbin thread counting

5 0

speed of the sewing machine decreases.

6 1

“III-15. Connection of the material end sensor” p.43

function will be invalid.

(Function setting No. 37)

and the Instruction Manual for the

Thread trimming prohibiting function (Function setting No. 9)

⑤

This function turns OFF thread trimming solenoid output and wiper solenoid output when thread trimming is

actuated.

(Caution) This function is rendered effective only with the CP-18.

By this function, separate sewing material can be spliced and sewn without trimming thread.

0 : off Thread trimming is operative. (thread can be trimmed). 1 : on Thread trimming is inoperative. (thread can not be trimmed).

Setting of the needle bar stop position when the sewing machine stops (Function setting No. 10)

⑥

The position of the needle bar when the pedal is in its neutral position is specied.

0 : Down The needle bar stops in the lowest position of its stroke.

1 : Up The needle bar stops in the highest position of its stroke.

(Caution) If the stop position of the needle bar is set to the highest position, the thread trimming action will

Panel operating sound (Function setting No. 11)

⑦

Whether the panel operation generates sound or not can be selected.

0 : off Operation conrmation sound is not generated

1 : on Operation conrmation sound is generated.

9 0

1 0 0

be taken after the needle bar comes down once to the lowest position.

1 1 1

– 29 –

Selection of the optional input/output function (Function setting No. 12)

⑧

❶

Ⓐ

Ⓑ

❷

1 2 TPo _

TPo _

0i 1 ** *

1i 2

0o 1 ** *

0o 3

nE_ d

_ni _

Tuo _

❺❹❸

Select function setting No. 12 with the operating procedure of function setting procedures 1) through 3). Select the items of "End", "in" and "ouT" with keys ❺ and ❻.

[When "in" is selected]

The input function setting connector indication number is shown on indicating section Ⓐ. Designate the indication number by means of key ❸ or ❹. Specify the function of the pin of the connector corresponding to the indication number by means of key ❺ or ❻. Function code and abbreviation are displayed alternately on indicator Ⓑ.

(For the relation between signal input No. and connector pin array, refer to the separate list.)

[When "ouT" is selected]

The output function setting connector indication number is shown on indicating section Ⓐ. Designate the indication number by means of key ❸ or ❹. Specify the function of the pin of the connector corresponding to the indication number by means of key ❺ or ❻. Function code and abbreviation are displayed alternately on indicator Ⓑ.

(Refer to the separate table for the relation between the signal output numbers and the connector pin conguration.)

❻

❼

* Example) To assign the thread trimming function to the input function setting connector indication

number "i01" (CN36-4)

1 2 TPo _

TPo _

_ni _

0i 1 on P

0i 1 ST W

Lighting alternately

L 4

0i 1

L 4

H 4

0i 2 SFS W

TPo _

_ni _

1. Select function setting No. 12 with the operating procedure of function setting procedures 1) through 3).

2. Select the item of "in" with keys ❺ and ❻.

3. Select the port of the indication number "i01" by means of key ❹.

4. Select the thread trimming function, "TSW" with keys ❺ and ❻.

5. Determine the thread trimming function, "TSW" with key ❹.

6. Set ACTIVE of the signal with keys ❺ and ❻.

Set the display to "L" when the signal is "Low" and performing thread trim-

ming, and set the display to "H" when the signal is "High" and performing thread trimming.

7. Determine the aforementioned function with key ❹.

8. Finish the optional input with key ❹.

TPo _

nE_ d

9. Select the item of "End" with keys ❺ and ❻ to return to the function setting mode.

– 30 –

Input function list

Function

code

Abbrevia-

tion

0 noP No function (Standard setting)

1 HS Needle up / down compensat-

ing stitching

2 bHS Back compensating stitching Reverse feed stitching is performed at low speed while

3 EbT Function of canceling once re-

verse feed stitching at the end of sewing

4 TSW Thread trimming function This function is actuated as the thread trimming

5 FL Presser foot lifting function This function is actuated as the foot lifter switch.

6 oHS One stitch compensating

stitching

7 SEbT Function of cancel of reverse

feed stitching at start/end

8 PnFL Presser lifting function when

pedal is neutral

9 Ed Material edge sensor input This function works as the input signal of material

10 LinH Function of prohibiting de-

pressing front part of pedal

11 TinH Function of prohibiting thread

trimming output

12 LSSW Low speed command input This function works as low speed switch for standing

13 HSSW High speed command input This function works as high speed switch for standing

14 USW Needle lifting function UP stop motion is performed when switch is pressed

15 bT Reverse feed stitching switch

input

16 SoFT Soft start switch input The speed of stitch is limited to the predetermined

23 Tiin Tsw command prohibition input Thread trimming command is prohibited.

24 USTP Lsw command prohibition/nee-

oSSW

bKoS

SFSW

MES

AUbT

CUnT

One-shot speed command switch input

Backward one-shot speed

command switch input

Safety switch input Rotation is prohibited.

Thread trimming safety switch input

Automatic reverse feed stitching cancellation/addition switch

Sewing counter input Every time the switch is pressed, the sewing counter

dle-up stop input

Function item Remarks

Every time the switch is pressed, normal feed stitching by half stitch is performed. (Same operation as that of up / down compensating stitching switch on the panel.)

the switch is held pressing. (It is effective only when a constant-dimension sewing is selected.)

By depressing the back part of the pedal after press-

ing the switch, operation of reverse feed stitching is

canceled once.

switch.

Every time the switch is pressed, one stitch stitching operation is executed.

By operating the optional switch, ineffective/effective can be alternately changed over.

Every time the switch is pressed, the function whether

automatically lifting the presser foot when the pedal is

neutral or not can be selected.

edge sensor.

Rotation by pedal is prohibited.

Output of thread trimming is prohibited.

sewing machine.

during DOWN stop.

Reverse feed stitching is output as long as the switch is held pressed.

soft-start speed as long as the switch is held pressed.

This function works as one-shot speed command as

long as the switch is pressed.

Reverse feed stitching is performed in accordance with

the one-shot speed command as long as the switch is

held pressed.

It operates as an input signal of the thread trimmer

safety switch.

Every time the switch is pressed, reverse feed stitch-

ing at sewing start or reverse feed stitching at sewing

end is cancelled or added.

value is increased.

Sewing by means of the pedal switch is prohibited.

The sewing machine stops with its needle up during

sewing.

– 31 –

Output function list

Function

code

10 CooL Needle cooler output Output for needle cooler

11 bUZ Buzzer output

12 LSWo Revolution command output Revolution demanding command state is output.

13 TSWo Tsw command monitor output Thread trimming command status is output.

Abbrevi-

ation

0 noP No function (Standard setting)

1 TrM Thread trimming output Output of thread trimming signal

2 WiP Thread wiper output Output of thread wiper signal

3 TL Thread release output Output of thread release signal

4 FL Presser lifter output Output of presser lifting signal

5 bT Reverse feed stitching output Output of reverse feed stitching signal

6 EbT EBT cancel monitor output State of one time cancel of reverse feed stitching at

7 SEbT Reverse feed stitching at start/

end cancel monitor output

8 AUbT Sewing start/end cancellation/

addition monitor output

9 SSTA

Sewing machine stop state output

Function item Remarks

end function is output.

State of cancel of reverse feed stitching at start/end is

output.

State of cancel or addition of automatic reverse feed

stitching is output.

Sewing machine stop state is output.

It is output when the bobbin counter set value has been

exceeded, an error has occurred or the bobbin thread remaining amount is detected.

Input function setting connectors

Connector No. Pin No. Display No. Initial value of function setting

CN36 4 i01 noP (No function setting)

CN48 2 i02 SFSW (Safety switch input)

CN50 12 i03 SoFT (Soft-start speed limit input)

CN36 5 i04 bT (Reverse feed stitching switch input)

CN50 11 i05

7 i06 TSW (Thread trimming switch input)

CN39

CN57 1 i10

CN42 2 i11 noP (No function setting)

CN54 3 i12 noP (No function setting)

Output function setting connector

Connector No. Pin No. Display No. Initial value of function setting

CN50

11 i07 LSSW (Low-speed revolution switch input)

9 i08

5 i09 FL (Presser foot lifting switch input)

7 o01 bT (Reverse feed stitching output)

8 o02 TrM (Thread trimming output)

9 o03 LSWo (Revolution request input)

LinH (Input of prohibition of depress on front part of pedal)

HSSW (High-speed revolution switch input)

CUnT (Sewing counter input)

– 32 –

Sewing counting function (Function setting No. 14)

⑨

The function counts up every time thread trimming is completed and counts the number of completion of the

sewing process.

0 : off Sewing counting function is inoperative.

1 4 1

1 : on Sewing counting function is operative. (Every time thread trimming is

performed)

2 : on External sewing counter switch input.

(Caution) The sewing counter can only be operative when the CP-180 is used with the sewing machine.

The counter indication changes as shown below according to the combination of setting No. 6 and setting No.

14.

Setting No. 6 Setting No. 14 Counter

1 1 Bobbin counter 1 0 Bobbin counter 0 1 Sewing counter (only with CP-180) 0 0 Counter function is ineffective.

Neutral automatic presser lifting function (with AK device only) (Function setting No. 21)

⑩

This function can automatically lift the presser foot when the pedal is in the neutral position.

Automatic lifting time of the pedal depends on the automatic lifting time after thread trimming and when the

presser foot is automatically lowered, it is automatically lifted at the second neutral position after it has come off

the neutral position once.

0 : off Function of neutral automatic presser lifting is not operative.

2 1 0

1 : on Selection of function of neutral automatic presser lifting

Needle up/down switch function changeover function (Function setting No. 22)

⑪

The needle up/down switch function can be changed over between the needle up/down compensation and one

stitch compensation.

0 : Needle up / down compensating stitching

2 2 0

1 : One stitch compensating stitching

Setting of the suction time of the back-tack solenoid (Function setting No. 29)

⑫

This function can change the suction time of the back-tack solenoid.

It is effective to decrease the value when the heat is high.

(Caution) When the value is excessively decreased, failure of motion or defective pitch will follow.

Be careful when changing the value.

Setting range : 50 to 500 ms <10 / ms>

2 9 52 0

– 33 –

Function of reverse feed stitching on the way (Function setting Nos. 30 to 33)

⑬

Functions of the limit of number of stitches and thread trimming command can be added to the touch back switch on the sewing machine head.

Function setting No. 30 Function of reverse feed stitching on the way is selected.

0 : off Normal back-tack function

3 0 0

1 : on Function of reverse feed stitching on the way

Function setting No. 31 Number of stitches performing reverse feed stitching is set.

Setting range

3 1 4

0 to 19 stitches

Function setting No. 32 Effective condition of reverse feed stitching on the way

3 2 0

0 : off Inoperative when the sewing machine stops. (Reverse feed stitching

on the way functions only when the sewing machine is running.) 1 : on Operative when the sewing machine stops. (Reverse feed stitching on the way functions both when the sewing

machine is running and stops.)

(Caution) Either condition is operative when the sewing machine is running.

Function setting No. 33

0 : off Without thread trimming

3 3 0

Thread trimming is performed when reverse feed stitching on the way is completed.

1 : on Thread trimming is executed.

Application

❶

Function setting

No. 30 No. 32 No. 33

0 0 or 1 0 or 1 It works as normal touch-back switch.

Output function

When operating touch-back switch at the time of depressing front part of the

❷

1 0 0

pedal, reverse feed stitching as many as the number of stitches specied by the

function setting No. 31 can be performed. When operating touch-back switch at the time of either stop of the sewing ma-

❸

1 1 0

chine or depressing front part of the pedal, reverse feed stitching as many as the

number of stitches specied by the function setting No. 31 can be performed.

When operating touch-back switch at the time of depressing front part of the

❹

1 0 1

pedal, automatic thread trimming is performed after reverse feed stitching as

many as the number of stitches specied by the function setting No. 31 has been

performed. When operating touch-back switch at the time of either stop of the sewing ma-

❺

1 1 1

chine or depressing front part of the pedal, automatic thread trimming is per-

formed after reverse feed stitching as many as the number of stitches specied by

the function setting No. 31 has been performed.

Actions under each setting state

Used as the normal reverse feed stitching touch-back switch.

❶

Used for reinforcing seam (press sewing) of the pleats. (It works only when the sewing machine is running.)

❷

Used for reinforcing seam (press sewing) of the pleats.

❸

(It works either when the sewing machine stops or when the sewing machine is running.)

Used as starting switch for reverse feed stitching at the sewing end.

❹

(Used as the substitute for thread trimming by depressing back part of the pedal. It works only when the sewing

machine is running. It is especially effective when the sewing machine is used as the standing-work machine.)

Used as starting switch for reverse feed stitching at the sewing end.

❺

(Used as the substitute for thread trimming by depressing back part of the pedal. It works either when the sewing

machine stops or when the sewing machine is running. It is especially effective when the sewing machine is used as the standing-work machine.)

Number of rotation of one-shot stitching (Function setting No. 38)

⑭

This function can set, by the pedal operation of one time, the sewing speed of one-shot stitching when the sew-

ing machine continues stitching until completing the number of stitches specied or detecting the material end.

Setting range

3 8 052 0

150 to MAX. sti/min <50 / sti/min>

(Caution) The max. number of rotation of one-shot stitching is limited by the model of the sewing machine

head.

– 34 –

Holding time of lifting presser foot (Function setting No. 47)

⑮

This function automatically lowers the presser foot when the time set with the setting No. 47 has passed after

lifting the presser foot.

When the pneumatic type presser foot lifter is selected, the holding time control of lifting presser foot is limitless regardless of the set value.

Setting range

4 7 6 0

10 to 600 sec <10 / sec>

Compensation of timing of the solenoid for reverse feed stitching (Function setting No. 51 to 53)

⑯

When the normal and reverse feed stitches are not uniform under the automatic reverse feed stitching action, this function can change the ON / OFF timing of the solenoid for back tack and compensate the timing.

Compensation of on-timing of solenoid for reverse feed stitching at the start of sewing (Function setting No.

❶

51)

On-timing of solenoid for reverse feed stitching at the start of sewing can be compensated by the unit of

angle.

Adjusting range

– 36 to 36 <1 / 10˚>

Set value Compensation angle

5 1 – 8

Number of stitches of

compensation

– 36 – 360° – 1

– 18 – 180° – 0.5

0 0° 0 18 180° 0.5 36 360° 1

– 360˚ – 180˚

180˚ 360˚

* When the point

before 1 stitch is

regarded as 0˚,

compensation is

0˚

possible by 360˚ (1

stitch) in front and in

the rear.

Compensation of off-timing of solenoid for reverse feed stitching at the start of sewing (Function setting No.

❷

52)

Off-timing of solenoid for reverse feed stitching at the start of sewing can be compensated by the unit of

angle.

Adjusting range

– 36 to 36 <1 / 10˚>

Set value Compensation angle

5 2 1 0

Number of stitches of

compensation

– 36 – 360° – 1

– 360˚

– 180˚

0˚ 180˚ 360˚

– 18 – 180° – 0.5

0 0° 0 18 180° 0.5 36 360° 1

Compensation of off-timing of solenoid for reverse feed stitching at the end of sewing (Function setting No.

❸

53)

Off-timing of solenoid for reverse feed stitching at the start of sewing can be compensated by the unit of

angle.

Adjusting range

5 3 1 5

– 36 to 36 <1 / 10˚>

Set value Compensation angle

Number of stitches of

compensation

– 36 – 360° – 1

– 18 – 180° – 0.5

– 360˚ – 180˚

0˚ 180˚ 360˚

0 0° 0

18 180° 0.5

36 360° 1

– 35 –

Foot lift function after thread trimming (Function setting No. 55)

⑰

This function can automatically lift the presser foot after thread trimming. This function is effective only when it

is used in combination with the AK device.

0 : off Function of automatically lifting the presser foot is not provided.

5 5 1

(Presser foot does not automatically go up after thread trimming.)

1 : on Function of automatically lifting the presser foot is provided.

(Presser foot automatically goes up after thread trimming.)

Reverse revolution to lift the needle after thread trimming (Function setting No. 56)

⑱

This function is used to make the sewing machine rotate in the reverse direction after thread trimming to lift the

needle bar almost to highest position. Use this function when the needle appears under the presser foot and it

is likely to make scratches on the sewing products of heavy-weight material or the like.

0 : off Function of making the sewing machine rotate in the reverse direction

5 6 0

1 : on Function of making the sewing machine rotate in the reverse direction

(Caution) The needle bar is raised, by rotating the machine in the reverse direction, almost to the highest

dead point. This may result in slip-off of the needle thread. It is therefore necessary to adjust the

length of thread remaining after thread trimming properly.

to lift the needle after thread trimming is not provided.

to lift the needle after thread trimming is provided.

Function of holding predetermined upper / lower position of the needle bar (Function setting No. 58)

⑲

When the needle bar is in the upper position or in the lower position, this function holds the needle bar by ap-

plying a brake slightly.

0 : off Not provided with the function of holding predetermined upper/lower

5 8 0

1 : on Provided with the function of holding predetermined upper/lower posi-

2 : on Provided with the function of holding predetermined upper/lower posi-

3 : on Provided with the function of holding predetermined upper/lower posi-

Change-over function of AUTO / Pedal for sewing speed of the reverse feed stitching at the start of sew-

⑳

ing (Function setting No. 59)

This function selects whether the reverse feed stitching at the start of sewing is performed without a break at the

speed set by the function setting No. 8 or the stitching is performed at the speed by the pedal operation.

0 : Manual The speed is indicated by the pedal operation.

5 9 1

1 : Auto Automatic stitching at the specied speed

(Caution) 1. The max. sewing speed of the reverse feed stitching at the start of sewing is limited to

the speed set by the function setting No. 8 regardless of the pedal.

2. When “0” is selected, stitches of reverse feed stitching may not match those of normal feed stitching.

position of the needle bar

tion of the needle bar (holding force is weak.)

tion of the needle bar (holding force is medium.)

tion of the needle bar (holding force is strong.)

Function of stop immediately after the reverse feed stitching at the start of sewing (Function setting No. 60)

󰼼

This function temporarily stops the sewing machine even when keeping depressing the front part of the pedal

at the time of completion of process of reverse feed stitching at the start of sewing.

It is used when sewing a short length by reverse feed stitching at the start of sewing.

6 0 0

0 : Not provided with the function of temporary stop of the sew-

ing machine immediately after the reverse feed stitching at the start of sewing

1 : Provided with the function of temporary stop of the sewing

machine immediately after the reverse feed stitching at the start of sewing

Stop the sewing machine

temporarily to change

direction of sewing products.

– 36 –

Function of soft-down of presser foot (with AK device only) (Function setting No. 70 and 49)

󰽇

This function can softly lower the presser foot.

This function can be used when it is necessary to decrease contact noise, cloth defect, or slippage of cloth at

the time of lowering the presser foot.

Note : Change the time of function setting No. 49 together at the time of selecting the function of soft-down

since the sufcient effect cannot be obtained unless the time of function setting No. 49 is set longer

when lowering the presser foot by depressing the pedal.

0 to 500 ms

4 9 41 0

10 ms/Step

0 : Function of soft-down of presser foot is not operative. (Presser foot is rapid-

7 0 0

ly lowered.)

1 : Selection of function of soft-down of presser foot

Function of reducing speed of reverse feed stitching at the start of sewing (Function setting No. 92)

󰽈

Function to reduce speed at the time of completion of reverse feed stitching at the start of sewing : Normal use

depending on the pedal condition (Speed is accelerated to the highest without a break.)

This function is used when temporary stop is used properly. (Cuff and cuff attaching)

0 : Speed is not reduced.

9 2 0

1 : Speed is reduced.

Retry function (Function setting No. 73)

󰽉

Temporary stop

Sew without stopping

without a break.

When the retry function is used, if the sewing material is thick and not pierced with needle, this function makes

the needle pierce in the material with ease.

0 : Retry function is not provided.

7 3 1

1 - 10 : Retry function is provided. 1: Needle-bar returning force before operating the retry function: 1

(small) - 10 (large)

Presser foot lifting solenoid suction time setting (Function setting No. 84)

󰽊

Suction time of presser foot lifting solenoid can be changed. When heating is great, it is effective to lessen the

value.

(Caution) When the value is excessively small, malfunction will be caused. So, be careful when changing the

value.

Setting range : 50 to 250ms <10/ms>

8 4 41 0

Function of pedal curve selection (Function setting No. 87)

󰽋

This function can perform the selection of the curve of number of rotation of the sewing machine against the

depressing amount of the pedal.

Change to this function when you feel that inching operation is hard or that pedal response is slow.

8 7 0

0 : Number of rotation of the sewing ma-

chine in terms of the depressing amount

of the pedal increases linearly.

1 : Reaction to intermediate speed in terms

of the depressing amount of the pedal is

delayed.

2 : Reaction to intermediate speed in terms

of the depressing amount of the pedal is

Number of rotation

(sti/min)

Pedal stroke (mm)

advanced.

– 37 –

Initial motion UP stop position move function (Function setting No. 90)

󰽌

Effective/ineffective of automatic return to UP stop position immediately after turning ON the power can be set.

0 : Ineffective

9 0 1

1 : Effective

Function added to the needle up / down compensating switch (Function setting No. 93)

󰽍

One stitch operation can be performed only when the needle up / down compensating switch is pressed at the

time of upper stop immediately after turning ON the power switch or upper stop immediately after thread trim-

ming.

0 : Normal (Only needle up / down compensating stitching operation)

1 : One stitch compensating stitching operation (upper stop / upper stop) is

Continuous stitching + one shot stitching nonstop function (Function setting No. 94)

󰽎

This function is used to proceed a step to the next one without stopping the sewing machine at the end of the

step when performing sewing with the continuous sewing and one-shot sewing combined using the program-

ming function of the operation panel IP.

0 : Normal (Stop when a step has completed.) 1 : The sewing machine proceeds to next step without stopping after a step

9 3 0

performed only when aforementioned changeover is made.

9 4 0

has completed.

Setting of max. number of rotation of the sewing machine head (Function setting No. 96)

󰽏

This function can set the max. number of rotation of the sewing machine head you desire to use.

Upper limit of the set value varies in accordance with the sewing machine head to be connected.

150 to Max. [sti/min] <50 / sti/min>

9 6 004 0

Main shaft reference angle compensation (Function setting No. 120)

󰽐

Main shaft reference angle is compensated

Setting range

21 0 2– 3

– 60 to 60˚ <1 / ˚>

UP position starting angle compensation (Function setting No. 121)

󱞥

Angle to detect UP position starting is compensated.

Setting range

21 1 5

– 15 to 15˚ <1 / ˚>

DOWN position starting angle compensation (Function setting No. 122)

󱞦

Angle to detect DOWN position starting is compensated.

Setting range

21 2 0

– 15 to 15˚ <1 / ˚>

Setting of energy saving function during standby (Function setting No. 124)

󱞧

It is possible to reduce power consumption while the sewing machine is in standby state. It should be noted that

the startup of the sewing machine may delay for a moment if this function is set.

21 4 0

0 : Energy-saving mode is ineffective.

1 : Energy-saving mode is effective.

– 38 –

9. Automatic compensation of neutral point of the pedal sensor

Whenever the pedal sensor, spring, etc. are replaced, be sure to perform following operation :

❶

Ⓐ

Ⓑ

1) Pressing switch ❹, turn ON the

power switch.

2) Compensated value is displayed on

indicator Ⓑ.

(Caution) 1. At this time, the pedal sen-

sor does not work properly

if the pedal is depressed.

Do not place the foot or any

object on the pedal. Warn-

❷

❺❹❸

❻

❼

2. If any display ("-0-" or "-8-")

ing sound "blips" and the

correct compensation value

is not displayed.

other than a numeric value

appears on indicator Ⓑ, re-

fer to the Engineer's Manual.

3) Turn OFF the power switch, and turn ON the power switch again to return to the normal mode.

(Caution) Be sure to re-turn ON the power switch when one or more seconds have passed after turning it OFF.

(If the ON-OFF operation is carried out faster than the above, the setting may not change normally.)

10. Selection of the pedal specications

When the pedal sensor has been replaced, change the set value of function setting No. 50 according to the newly

connected pedal specications.

0 : KFL

1 : PFL

(Caution) Pedal sensor with two springs

located at the back part of the

pedal type is PFL, and that

with one spring type is KFL.

Set the pedal sensor to PFL

when lifting the presser foot by

depressing the back part of the

pedal.

❷

❶

Ⓐ

❺❹❸

❻

Ⓑ

❼

– 39 –

11. Setting of the auto lifter function

WARNING :

When the solenoid is used with the air drive setting, the solenoid may be burned out. So, do not mistake the setting.

When the auto-lifter device (AK) is attached, this function makes the function of auto-lifter work.

❶

Ⓐ

Ⓑ

1) Turn ON the power switch with

switch ❺ held pressed.

2) “FL ON” is displayed on indicators Ⓐ

and Ⓑ with a blip to make the auto

lifter function effective.

3) Turn OFF the power switch, and turn ON the power switch again to return to the normal mode.

4) Repeat the operation 1) to 3), and LED display is turned to “FL OFF”. Then, the

❷

❺❹❸

❻

❼

function of auto-lifter does not work.

FL ON : Auto-lifter device becomes effective. Selection of the auto-lifter device of solenoid drive (+33V) or

of air drive (+24V) can be performed with switch ❻. (Changeover is performed to drive power +33V or +24V of CN37.)

Solenoid drive display (+33V)

Air drive display (+24V)

FL OFF : Auto-lifter function does not work. (Similarly, the presser foot is not automatically lifted when pro-

grammed stitching is completed.)

(Caution) 1. To perform re-turning ON of the power, be sure to perform after the time of one second or more has

passed. (If ON / OFF operation of the power is performed quickly, setting may be not changed over well.)

2. Auto-lifter is not actuated unless this function is properly selected.

3. When “FL ON” is selected without installing the auto-lifter device, starting is momentarily delayed at the start of sewing. In addition, be sure to select “FL OFF” when the auto-lifter is not installed since the touch-back switch may not work.

– 40 –

12. Selecting procedure of the key-lock function

Setting of the number of stitches for a pattern can be prohibited by enabling the key lock function.

❶

❷

4) While the key lock function is effective, "KEY LOCK" is displayed on the indicators when turning the power ON.

5) When you carry out steps 1) to 3) in repetition, "KEY LOCK" is not displayed when turning the power ON and

the key lock function is rendered ineffective.

• KEY LOCK display when turning the power ON

Display appears: The key lock function is effective.

Display does not appear: The key lock function is ineffective.

In the case the key lock function is effective, the operation of the panel will be as shown in the table below. (Pattern

indication number)

Ⓐ

❺❹❸

❻

Ⓑ

❼

1) Turn ON the power switch with

switch ❺ and switch ❻ held

pressed.

2) "KEY LOCK" is displayed on indicators

and Ⓑ with a blip to make the key-

Ⓐ

lock function effective.

3) The panel returns to the normal oper-

ation after displaying "KEY LOCK" on

the indicators.

• In the case the operation is disabled Setting of the number of stitches for a pattern (❹)

• Functions that are operated in the same

procedure as in the case of normal operation state

Change of the sewing pattern (❶ and ❷) Changeover of the reverse feed stitching (❸ and ❺) Production support function (❼)

13. Connection of the pedal of standing-work machine

1) Connect the connector of PK70 to connector ❶ (CN39 : 12P) of SC-920.

2) Tighten the cord of PK70 together with other cords

with cable clip band ❷ attached to the side of the

box after passing it through the cable clamp.

(Caution) Be sure to turn OFF the power before con-

necting the connector.

❷

❶

– 41 –

14. External input / output connector

External input/output connector (CN50) ❶ which can take out the following signals that are convenient when in-

stalling counter or the like outside is prepared.

(Caution) When using the connector, note that the engineer who has the electrical knowledge has to work.

❶

Table of assignment of connector and signal

CN50 Signal name Input / output Description Electric spec.

1 +5V - Power source

2 MA Output Rotation signal 360 pulses/rotation DC5V

3 MB Output – DC5V

4 UDET(N) Output “L” is output when needle bar is at LOW position. DC5V

5 DDET(N) Output “L” is output when needle bar is at UP position. DC5V

6 HS(N) Output Rotation signal 45 pulses/rotation DC5V

7 BTD(N) Output “L” is output when the back-tack solenoid works. DC5V

8 TRMD(N) Output “L” is output when the thread trimmer solenoid works. DC5V

9 LSWO(P) Output Rotation request (pedal or the like) monitor signal DC5V

10 S.STATE(N) Output “L” is output when the sewing machine is in the stop

state.

11 LSWINH(N) Input Rotation by pedal is prohibited while “L” signal is being

inputted.

12 SOFT Input Rotation speed is limited to the soft-speed while “L” sig-

nal is being inputted.

13 SGND - 0V

JUKI genuine part No. Connector : Part No. HK016510130 Pin contact : Part No. HK016540000

DC5V

DC5V, –5mA

– 42 –

15. Connection of the material end sensor

❶

❷

Pin No. Signal name Remarks

1 +12V

2 +5V

3 OPT_S

4 GND

Power supply is selected

according to the sensor

used.

Sensor input is assigned to the material end sen-

sor.

1) Connect the connector of material end sensor to

connector ❶ (CN54 : 4P) of SC-920.

2) Tighten the cord of the material end sensor togeth-

er with other cords with cable clip band ❷ attached

to the side of the box after passing it through the cable clamp.

3) Assign CN54 to the material end sensor input

referring to

input/output function (Function setting No. 12)”

p.30

4) To use the material end sensor with the CP-18, set

up the sensor functions on the control box through the function setting procedure. Selectable functions

and the corresponding selection numbers are as

follows:

•

Material end sensor function (function setting No. 2)

The material end sensor is enabled.

0: Material end sensor is not used. 1: Material end sensor is enabled.

“III-8-⑧ Selection of the optional

• Thread trimming function by means of the material

end sensor (function setting No. 3)

The automatic thread trimmer is activated after the

detection of the material end.

0: Automatic thread trimming is not carried out. 1: Automatic thread trimming is carried out.

• The number of stitches after the activation of the

material end sensor (function setting No. 4)

The number of stitches to be sewn until the sewing

machine stops after the material end sensor has

detected the material end can be specied.

Data setting range: 0 - 19 <1/stitch>

• One-shot function (function setting No. 76)

The one-shot operation until the material end is

detected can be set.

7 6

0: One-shot operation is not carried out. 1: One-shot operation is carried out.

(Caution) 1. Be sure to turn OFF the power before

connecting the connector.

2. For the use of the material end sensor,

refer to the Instruction Manual attached to the material end sensor.

JUKI genuine

part number

Connector HK042310040 Pin connector HK042340000

– 43 –

16. Initialization of the setting data

All contents of function setting of SC-920 can be returned to the standard set values.

❶

❷

(Caution) Do not turn OFF the power on the way of initializing operation. Program of the main unit may be bro-

ken.

4) Turn OFF the power switch and turn ON the power switch after closing the front cover. The machine returns to

the normal motion.

(Caution) 1. When you carry out the aforementioned operation, the neutral position correction value for the ped-

al sensor is also initialized. It is therefore necessary to carry out automatic correction of the pedal

sensor neutral position before using the sewing machine. (Refer to “III-9. Automatic compensation

of neutral point of the pedal sensor” p.39.)

2. When you carry out the aforementioned operation, the machine-head adjustment values are also

initialized. It is therefore necessary to carry out adjustment of the machine head before using the

sewing machine. (Refer to “II-7. Adjusting the machine head (direct-drive motor type sewing ma-

chine only)” p.14.)

3. Even when this operation is performed, the sewing data set by the operation panel cannot be ini-

tialized.

Ⓐ

❺❹❸

❻

Ⓑ

❼

1) Turn ON the POWER switch with all

of switch ❹, switch ❺ and

switch ❻ held pressed.

2) "rS" is displayed on indicator Ⓑ with a

blip to start initialization.

3) The buzzer sounds after approximately

one second (single sound three times,

“peep”, “peep”, and “peep”), and the

setting data returns to the standard

setting value.

IV. MAINTENANCE

1. Removing the rear cover

WARNING :

To prevent personal injuries caused by electric shock hazards or abrupt start of the sewing machine, remove the cover after turning OFF the power switch and a lapse of 5 minutes or more. To prevent personal injuries, when a fuse has blown out, be sure to replace it with a new one with the same capacity after turning OFF the power switch and removing the cause of the blown-out of the fuse.

1) Press the OFF button of the power switch to turn

OFF the power after conrming that the sewing ma-

chine has stopped.

2) Draw out the power cord coming from the power

plug socket after conrming that the power switch

is turned OFF. Perform the work of step 3) after

conrming that the power has been cut and it has

passed for 5 minutes or more.

– 44 –

3) Loosen setscrew

in cover ❶. Open cover ❶.

❷

❶

❷

4) To close cover

, re-tighten setscrew ❷ while pay-

❶

ing attention to the orientation of cable clip band

mounted on the side face of the box.

❸

2. Replacing the fuse

(1) PWR PCB

(Caution) The illustration below shows the PWR-T PCB. The type of PCB differs by destination.

1) Remove all the cables

which are connected to

the control box.

2) Remove the connecting

❶

❷

rod.

3) Remove the control box

from the table stand.

4) Holding the glass section

of fuse ❶, remove the

fuse.

❸

(Caution) There is a risk of electrical shock when removing the fuse. Be sure to remove the fuse after LED

has totally gone out.

5) Be sure to use a fuse with the designated capacity.

: 6.3 A/250 V Time-lag fuse (Power circuit protective fuse)

❶

Part number: KF000000080

6) Install the control box on the table stand. (Refer to

7) Connect all the cables to the control box. (Refer to

8) Fit the connecting rod back in place. (Refer to

“II-2. Installing to the table” p.3.)

“II-4. Connecting the cords” p.6.)

“II-5. Attaching the connecting rod” p.12.)

– 45 –

❷

(2) CTL PCB

1) Open the cover of the control box.

2) Pick up the glass section of fuse ❸ mounted

❸

on the CTL PCB with ngers to remove it.

(Caution) In order to protect against the pos-

sibility of electric shock, it is neces-

sary to remove the fuse after LED ❷

of the PWR PCB has totally gone off.

3) Be sure to use a fuse with the designated capacity.

: 6.3 A/250 V Time-lag fuse (Solenoid power circuit protection fuse)

❸

Part number: KF000000030

4) Close the cover of the control box.

3. Error codes

In case of the following, check again before you judge the case as trouble.

Phenomenon Cause Corrective measure

When tilting the sewing machine,

the buzzer beeps and the sewing

machine cannot be operated.

Solenoids for thread trimming

Solenoids for thread trimming,

reverse feed, wiper, etc. fail to work. Hand lamp does not light up.

Even when depressing the pedal immediately after turning ON the

power, the sewing machine does not run. When depressing the pedal after depressing the back part of pedal

once, the sewing machine runs.

The sewing machine does not stop even when the pedal is returned to

its neutral position.

Stop position of the sewing machine

varies (irregular).

Presser foot does not go up even when auto-lifter device is attached.

Touch-back switch fails to work. Presser foot is going up by auto-liter de-

UP position move fails to work when all lamps on the panel light up.

Sewing machine fails to run. Motor output cord (4P) is disconnected. Connect the cord properly.

When tilting the sewing machine without

turning OFF the power switch, Action giv-

en on the left side is taken for safety sake.

When the fuse for solenoid power protec-

tion has blown out

Neutral position of the pedal has varied. (Neutral position may be shifted when

changing spring pressure of the pedal or

the like.)

When tightening the screw in the hand-

wheel is forgotten at the time of adjust-

ment of needle stop position.

Auto-lifter function is OFF. Select “FL ON” by auto-lifter func-

Pedal system is set to KFL system

Cord of auto-lifter device is not connected to connector (CN37).

vice.

Auto-lifter device is not attached. However, auto-lifter function is ON.

The mode is in the function setting mode. The switch on the CTL p.c.b. is pressed by

the bound cords and the aforementioned

mode resulted.

Connector (CN30) of motor signal cord is disconnected.

Tilt the sewing machine after turn-

ing OFF the power.

Check the fuse for solenoid power protection.

Execute the automatic neutral correction function of the pedal sensor.

Securely tighten the screw in the

handwheel.

tion selection.

Change the jumper to PFL setting

to lift the presser foot by depress-

ing the back part of the pedal.

Connect the cord properly.

Operate the switch after the press-

er foot lowered.

Select “FL OFF” when auto-lifter device is not attached.

Remove the under cover. Bundle

the cables by routing them according to the normal routing method as

described in the Instruction Manual.

Connect the cord properly.

– 46 –

In addition, there are the following error codes in this device. These error codes interlock (or limit function) and

inform the problem so that the problem is not enlarged when any problem is discovered. When you request our

service, please conrm the error codes.

[Checking procedure of the error code]

❶

Ⓐ

Ⓑ

1) Turn ON the power switch with

switch ❸ held pressed.

2) The latest error number is displayed on

indicator Ⓑ with a blip.

3) Contents of previous errors can be

checked by pressing switch ❸

or switch ❹. (When the con-

❷

❺❹❸

❻

❼

rmation of the contents of previous

error advanced to the last, the warning

sound peeps in single tone two times.)

(Caution) When switch ❸ is pressed, the previous error code of the currently displayed one is displayed.

When switch ❹ is pressed, the next error code of the currently displayed one is displayed.

Error code list

No.

E000 Execution of data

E003 Disconnection of syn-

E004 Synchronizer lower

E005 Synchronizer upper po-

E007 Overload of motor • When the machine head is locked.

E011(*) Media is not inserted. • Media is not inserted. • Turn the power OFF and check the media. E012(*) Read error • Data of media cannot be read. • Turn the power OFF and check the media. E013(*) Write error • Data of media cannot be written. • Turn the power OFF and check the media. E014(*) Write protect • Media is in the state of writing prohi-

E015(*) Format error • Formatting cannot be performed. • Turn the power OFF and check the media. E016(*) External media capaci-

E019(*) File size over • File is too large. • Turn the power OFF and check the media. E032(*) File interchangeability

E041(*) Sewing recorder error • This error number is displayed in the

* The error number attached with an asterisk (*) is displayed only in the case a fault occurs when the IP/IT panel

is connected to the sewing machine.

Description of error

detected

− Media cover open • Cover of the slot of media is open. • Close the cover.

initialization (This is not the error.)

chronizer connector

position sensor failure

sition sensor failure

ty over

error

Cause of occurrence expected Items to be checked

• When the machine head is changed.

• When the initialization operation is executed.

• When position detection signal is not

input from the sewing machine head

synchronizer.

• When the synchronizer has broken.

• Belt is loose.

• Machine head is not proper.

• Motor pulley is not proper.

• When sewing extra-heavy material

beyond the guarantee of the machine

head.

• When the motor does not run.

• Motor or driver is broken.

bition.

• Capacity of media is short. • Turn the power OFF and check the media.

• There is no interchangeability of le. • Turn the power OFF and check the media.

event of a sewing recorder data fault.

• Check the synchronizer connector (CN33) for loose connection and disconnection.

• Check whether the synchronizer cord has

broken since the cord is caught in the ma-

chine head.

• Check the belt tension.

• Check the setting of the machine head.

• Check the setting of the motor pulley.

• Check whether the thread has been entangled in the motor pulley.

• Check the motor output connector (4P) for loose connection and disconnection.

• Check whether there is any holdup when turning the motor by hand.

• Turn the power OFF and check the media.

• Check whether the data has any fault.

– 47 –

No.

E044(*) Date and time error • This error number is displayed in the

E053(*) Notication of produc-

E055(*) Production manage-

E056(*) Work management

E057(*) Pitch time monitor error • This error number is displayed in the

E065(*) Network transmission

E067(*) ID reading failed • This message is displayed in the

E070 Slip of belt • When the machine head is locked.

E071 Disconnection of motor

E072 Overload of motor at

E204(*) USB insertion • This message is displayed in the

E205(*) Warning of ISS buffer

E220 Grease-up warning • When the predetermined number of

E221 Grease-up error • When the predetermined number of

E302 Fall detection switch

* The error number attached with an asterisk (*) is displayed only in the case a fault occurs when the IP/IT panel

is connected to the sewing machine.

Description of error

detected

tion support function

initialization (This is not an error)

ment error

error

failed

output connector

the time of thread trimming motion

remaining amount

failure

(When the safety switch works)

(Thread trimming knife sensor)

Cause of occurrence expected Items to be checked

• Check whether the data has any fault.

event of operation/data fault concern-

ing date or time of day.

• This error number is displayed after

the execution of initialization of the

production support function or up-

grading of the program.

• This error number is displayed in the event of production management

work management data fault.

• This error number is displayed in the

event of data fault.

event of pitch time monitor data fault.

• This message is displayed in the case data cannot be sent to the personal

computer by way of the network.

case data in the ID le is broken.

• Belt is loose.

• Disconnection of motor connector. • Check the motor output connector for loose

• Same as E007. • Same as E007.

case the sewing machine is activated

with the USB thumb drive inserted.

• This message is displayed in the case the buffer storage for storing the

ISS data is almost full.

If the sewing machine is continuously

used with the buffer storage full, the stored pieces of data will be erased

from the earliest one.

stitches has been reached.

stitches has been reached and the

sewing is not possible.

• When fall detection switch is input in the state that the power is turned ON.

• Machine-head tilt detector's connecter has come off.

• Thread trimming knife position is not

correct.

• Check whether the data has any fault.

• Check whether the network has any fault.

• Check whether the data has any fault.

• Check whether there is any holdup when turning the motor by hand.

• Check the belt tension.

connection and disconnection.

• Remove the USB thumb drive.

• Output the data.

• Replenish the specied places with grease and reset.

(For the details, refer to the data of the ma-

chine head.)

• Replenish the specied places with grease and reset.

(For the details, refer to the data of the ma-

chine head.)

• Check whether the machine head is tilted

without turning OFF the power switch

(sewing machine operation is prohibited for safety sake).

• Check whether the fall detection switch cord is caught in the sewing machine or the like.

• Check whether the fall detection switch lever is caught in something.

• Check whether the contact of the tilt detec-

tion switch lever with the machine table is

inadequate. (The table has a dent or the mounting location of the bed strut is too far)

• Check the machine-head tilt detector's connector (CN48) for looseness and slip-off.

• Positioning of the thread trimming sensor

• Set the function setting No. 74 to 0 (zero)

when the thread trimmer is not installed on

the sewing machine.

– 48 –

No.

E303 Semicircular plate sen-

E499 Simplied program

E703(*) Operation panel is

E704(*) System version mis-

E730 Encoder failure • When the motor signal is not properly E731 Motor hole sensor fail-

E733 Inverse rotation of mo-

E799 Thread trimming opera-

E808 Solenoid short circuit • Solenoid power does not become

E809 Holding motion failure • Solenoid is not changed over to hold-

E810 Solenoid current abnor-

E811 Abnormal voltage • When voltage higher than guaranteed

E906 Operation panel trans-

E924 Motor driver failure • Motor driver has broken.

E942 Faulty EEPROM

* The error number attached with an asterisk (*) is displayed only in the case a fault occurs when the IP/IT panel

is connected to the sewing machine.

Description of error

detected

sor error

data fault

connected to the unexpected sewing ma-

chine. (Error of sewing machine model)

match

ure

tor

tion time-out

mality

mission failure

Cause of occurrence expected Items to be checked

• Semicircular plate sensor signal can-

not be detected.

• Command parameter data is out of specied range.

• The operation panel and the sewing machine model do not match in the

initial communication.

• The system version is different from the correct one in the initial communi-

cation.

inputted.

• This error occurs when the motor is running at 500 sti/min or more in the opposite direction of that of rotation

indication during motor is running.

• The thread trimming control operation is not completed within the predeter-

mined time (within three seconds).

normal voltage.

ing motion.

• Solenoid rare short-circuit. • Solenoid resistance.

one is inputted.

• 200V has been inputted to SC-920 of 100V specications.

• JA : 220V is applied to 120V box.

• CE : 400V is applied to 230V box.

• When voltage lower than guaranteed one is inputted.

• 100V has been inputted to SC-920 of 200V specications.

• JA : 120V is applied to 220V box

• Inner circuit is broken by the applied overvoltage

• Disconnection of operation panel cord.

• Operation panel has broken.

• Data cannot be written on the EEPROM.

• Check whether the machine head corresponds with the machine type setting.

• Check whether the motor encoder connector is disconnected.

• Re-enter the relevant simplied program.

• Set the simplied program in disable.

• Connect the operation panel to the correct model of the sewing machine.

• Re-write the system version to the one that can be used with the operation panel.

• Check the motor signal connector (CN30) for loose connection and disconnection.

• Check whether the motor signal cord has

broken since the cord is caught in the ma-

chine head.

• Check whether the inserting direction of the motor encoder connector is wrong.

• Check whether the machine head corresponds with the machine type setting.

• Check whether the main-shaft motor encoder wire is connected incorrectly.

• Check whether the main-shaft motor wire for power supply is connected incorrectly.

• Check whether the machine head actually

installed is different from the machine head

selection.

• Check whether the motor-pulley diameter does not match its setting (effective diameter).

• Check whether the belt has slackened.

• Check whether the machine head cord is caught in the pulley cover or the like.

• Check whether the solenoid is abnormally heated. (CTL circuit board asm. Circuit is broken.)

• Check whether the applied power voltage is higher than the rated voltage + (plus) 10% or more.

• Check whether 100V/200V changeover connector is improperly set.

In the aforementioned cases, POWER p.c.b is broken.

• Check whether the voltage is lower than the rated voltage - (minus) 10% or less.

• Check whether 100V/200V changeover connector is improperly set.

• Check whether fuse or regenerative resistance is broken.

• Check the operation panel connector (CN38) for loose connection and disconnection.

• Check whether the operation panel cord

has broken since the cord is caught in the

machine head.

• Turn the power OFF.

– 49 –

JUKI SC-920 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

I. SPECIFICATIONS

II. SET-UP

1. Changing over the voltage between 100 V and 200 V

2. Installing to the table

3. Installing the control panel

4. Connecting the cords

5. Attaching the connecting rod

6. Setting procedure of the machine head

7. Adjusting the machine head (direct-drive motor type sewing machine only)

III. FOR THE OPERATOR

1. Operating procedure of the sewing machine

2. Operation panel (CP-18)

3. Operating procedure of the sewing pattern

(1) Reverse feed stitching pattern

(2) Overlapped stitching pattern

4. One-touch setting

5. Production support function

6. Setting of functions of SC-920

7. Function setting list

8. Detailed explanation of selection of functions

9. Automatic compensation of neutral point of the pedal sensor

11. Setting of the auto lifter function

12. Selecting procedure of the key-lock function

13. Connection of the pedal of standing-work machine

14. External input / output connector

15. Connection of the material end sensor

16. Initialization of the setting data

IV. MAINTENANCE

1. Removing the rear cover

2. Replacing the fuse

(1) PWR PCB

(2) CTL PCB

3. Error codes