JUKI SC-922 Instruction Manual
SC-922
INSTRUCTION MANUAL
CONTENTS
I. SPECIFICATIONS ........................................................................................ 1
II. SET-UP ........................................................................................................ 1
1. Installing to the table ..........................................................................................................................1
2. Installing the motor unit .....................................................................................................................2
3. Installing the control box ................................................................................................................... 2
4. Installing the belt ................................................................................................................................3
5. Adjusting the pulley cover .................................................................................................................3
6. Installation and adjustment for the protecting pin and the belt slip-off preventing bracket ....... 4
7. Connecting the cords ......................................................................................................................... 5
8. Attaching the connecting rod .......................................................................................................... 13
9. Setting procedure of the machine head .........................................................................................14
10. Adjusting the machine head (direct-drive motor type sewing machine only) ............................ 15
III. FOR THE OPERATOR ............................................................................. 16
1. Operating procedure of the sewing machine .................................................................................16
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 ...........................................................................................................22
6. Setting of functions of SC-922 ........................................................................................................25
7. Function setting list ..........................................................................................................................27
8. Detailed explanation of selection of functions ..............................................................................33
9. Automatic compensation of neutral point of the pedal sensor ...................................................47
10.Selectionofthepedalspecications ..............................................................................................47
11.
Stitch alignment for the reverse stitching at the end of sewing (for heavy-weight materials)
12. Input/output function of the hand switch and knee switch ..........................................................49
13. Use of the hand switch and the knee switch ..................................................................................50
14. Setting of the auto lifter function ....................................................................................................51
15. Selecting procedure of the key-lock function ................................................................................52
16. Initialization of the setting data ....................................................................................................... 52
17. External input / output connector ...................................................................................................53
18. How to connect the material edge sensor ......................................................................................54
... 48
IV. MAINTENANCE ....................................................................................... 55
1. Removing the rear cover ..................................................................................................................55
2. Replacing the fuse ............................................................................................................................ 55
3. Error codes ........................................................................................................................................56
i
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 310VA 310VA 310VA
* The electric power is a reference value for the model equipped with the LU-1510N-7 machine head.
It differs by the selected machine head.
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
The SC-922 can be used with the direct-motor type machine head as a stand-alone control box. It can also
be used with the belt-driven type machine head by installing on the motor unit.
This manual describes the procedure for the aforementioned two setup methods.
1. Installing to the table
To use the SC-922 with the direct-motor type machine head, install the control box on the table according to
the following instruction.
This describes the procedure for installing the
SC-922 on the table of the LU-2810-7 sewing ma-
1
1
!0
chine. To use any other machine head, install the
control box on the table referring to the Instruction
Manual for the main body of the relevant sewing ma-
chine. Install the control box suspending plate on the
table with mounting bolts supplied with the unit. At
this time, insert the nuts and washers supplied with
the unit as accessories as shown in the gure so that
the motor unit can be securely xed on the table.
1) Press three bolts 1 supplied with the unit as accessories into the motor hanging bolt hole in the
table and x them.
2) Fix suspending plate 5 supplied with the unit
on the three bolts with plain washer 2, spring
washer 3 and nut 4.
3) Fix rubber 6 on the suspending plate with spring
washer 7 and nut 8.
4) Hang one end of the control box on the threaded
part of rubber on the side which has two bolts.
Then, hang the other end of the control box on
the opposite side.
5) Temporarily x the other threaded part of rubber
with plain washer 9 and nut !0. In this case, the
spring washer is not used.
6) Adjusting the installing position of the control box.
Then, securely tighten the nuts.
2
3
4
9
6
5
7
8
– 1 –
2. Installing the motor unit
To use the SC-922 with the belt-drive type machine head, install the control box on the motor unit according
to the following instruction.
Install the motor unit on the table with the tting bolt
asm. supplied with the unit as accessories.
1
Nat
Spring washer
Convex washer
At this time, insert the nuts and washers supplied
with the unit as accessories as shown in the gure
so that the motor unit can be securely xed on the
table.
1) Press three bolts 1 supplied with the unit as ac-
cessories into the motor hanging bolt hole in the
table and x them.
2) Temporarily tighten convex washer, spring
washer and nut on the side where two bolts are
attached.
3) Hang the motor unit to the washer which has
been temporarily tightened, and attach convex
washer, spring washer and nut to the other bolt
on the opposite side.
4) After adjusting the installing position of the motor,
securely tighten the respective nuts.
3. Installing the control box
1
1) Attach bracket 1 supplied with the unit using
four supplied screws (M5 x 10) as shown in the
gure.
2
3
2) Loosen four screws 2 supplied with the motor unit as accessories, tighten screws
2
after
hanging control box unit 3 to the screws, and x
control box unit 3.
– 2 –
4. Installing the belt
15mm (9.8N)
1
5. Adjusting the pulley cover
b
Belt
a
1
1) The belt distance, between sewing machine pul-
ley and motor pulley, must be parallel.
2) The belt tension should be adjusted by turning
the tension adjust nuts 1 to change height of the
motor, so that the belt sinks down by about 15
mm (9.8N) when it is depressed by band at the
center of the belt span.
If the belt tension is not tight, speed is unstable
at low-speed or medium-speed operation, and
the needle will not stop exactly in position.
1) After adjusting the belt tension, adjust the pulley
cover 1 so that the clearances between the belt
and the pulley cover 1, a and b should be the
same.
2) After the completion of adjustment, tighten screws
located on the side of pulley cover
2
securely x the pulley cover
slip out of position.
so that it does not
1
1
and
1
2
– 3 –
6. Installation and adjustment f or the protecting pin and the b e l t slip-off
preventing bracket
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 ascertaining that the motor is at rest.
1) Attaching hole for the protecting pin
To attach protecting pin 1, select either attaching
hole A or attaching hole B in the motor pulley
cover in accordance with the direction of rotation
of the sewing machine and attach the pin in the
selected hole using screw 2 and washer 3 sup-
plied with the unit.
a))
If the motor shaft rotates in direction A in the
gure on the above:
Attach protecting pin 1 in attaching hole A .
→
b)
If the motor shaft rotates in direction B in the
gure on the above:
Attach protecting pin 1 in attaching hole B .
→
2
3
1
Belt
Attaching
hole
A
Belt
A
4 mm or less
B
Attaching
hole
B
1
4 mm or less
Adjusting position for protecting pin
Pulley
cover
Motor
pulley
Belt
3 mm or less
5
4
Adjusting position for belt slip-off preventing bracket
2) Adjustment for the protecting pin and the belt
slip-off preventing bracket
Adjust the position of protecting pin 1 and belt
slip-off preventing bracket 4 in accordance with
the gure on the left.
a) Adjusting the protecting pin
Loosen screw 2 and adjust so that protecting
pin 1 is positioned at the location indicated
in the gure on the left.
b) Adjusting belt slip-off preventing bracket
Loosen screw 5 and adjust so that belt slip-
off preventing bracket 4 is positioned at the
location indicated in the gure on the left.
If protecting pin 1 is not properly adjusted,
it is possible that your ngers may be caught
in the clearance provided between the pulley
and the belt resulting in injury. If belt slip-off
preventing bracket 4 is not properly ad-
justed, it is possible to allow the belt to slip off
causing safety hazard.
3) After the adjustment, tighten screws 2 and 5
so as to secure protecting pin 1 and belt slip-off
preventing bracket 4 to prevent these compo-
nents to uctuate because of vibration.
4) Before starting the operation of the sewing ma-
chine, ascertain that protecting pin 1 and belt
slip-off preventing bracket 4 do not come in
contact with the pulley and the belt.
– 4 –
7. 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 specifications, be sure to
connectallthecorrespondingconnectorstothespeciedplaces.
• 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.
Following connectors are prepared on the SC-922. Connect the connectors coming from the machine head
to the corresponding places so as to t the devices mounted on the machine head.
2
!1
1
CN30 Motor signal connector
1
CN33 Needle bar position detector (+5V type): It
2
detects the needle bar position.
CN36 Machine head solenoid: Provided with sole-
3
noids for thread trimming, reverse feed stitching, one-touch type reverse feed switch.
CN37 Presser foot lifting solenoid (Only for the auto-
4
matic presser foot lifter type)
CN38 Operation panel: Various kinds of sewing can
5
be programmed. (For details of the operation
panel other than CP-18, refer to the Instruction
Manual for the panel to be used.)
CN39 Standing machine pedal : JUKI standard
6
PK70, etc. Sewing machine can be controlled
with external signals.
CN40 Single-needle control solenoid: It is used with
7
the LH-4100 sewing machine provided with a
single-needle control device.
CN41 Stepping motor: It is used only with the DLU-
8
5494N-7.
5 6
!5!2
9
3 4 7 8
!0
CN43 Synchronizer (+12V type) : It detects the
9
CN44 Hand switch: Hand switch other than the
!0
CN48 Safety switch (standard) : When tilting the
!1
CN51 Extended input/output connector
!2
CN55LED lamp (+5 V type): The LED lamp can be
!3
CN58 Extended input connector (for the sensor
!4
CN59 Extended output connector (for the solenoid
!5
!4
needle bar position.
touch-back switch.
sewing machine without turning the power
OFF, the operation of the sewing machine is
prohibited so as to protect against danger.
OPTION switch: Input function can be changed
by changing over the internal function with this
switch.
connected optionally. (Refer to
touch setting" p.20
quantity of light.)
input, etc.)
valve output)
!3
"III-4. One-
for how to adjust the
– 5 –
A
2
B
3
1
1) Pass cords 1 of the thread trimmer solenoid,
reverse feed solenoid and detector cords
2
through table hole A and route them under the
table. (Detector cord 2 is not provided for the
direct-motor type machine head.)
[For the belt-drive type machine head]
!1
!0
9
5 7
48
2) Loosen screw B in cover 3 with a screwdriver to
open the cover.
For the direct-motor type machine head, proceed
to step 4).
3) Connect 14P code 4 coming
from the machine head to connector 5 (CN36).
When the optional AK device
is attached, connect 2P connector 6 coming from the AK
device to connector
(CN37).
7
Insert connector 8 coming
from the detector into connec-
6
tor 9 (CN33).
Connect 9P connector !0 com-
ing from the motor to connector
(CN30) on the circuit board.
!1
Proceed to step 5).
(Caution)
WhenusingtheAKdevice,setwhether tousetheAK deviceafterconrminghowtoselectthe
auto-lifter function. (Refter to “III-14. Setting of the auto lifter function” p. 51.)
[For the direct-motor type machine head]
!1
!0
5 7
4
– 6 –
6
4) Connect 14P cord 4 coming
from the machine head to con-
nector 5 (CN36). Connect 2P
connector 6 to connector
7
(CN37).
Connect 9P connector
!0
coming from the motor to connector !1 (CN30) on the circuit
board.
Proceed to step 5).
[Connecting the connector for the operation panel]
!3
!2
[ Connection of the pedal of standing-work machine ]
!5
5) The connector for the operation panel is provided.
Paying attention to the orientation of the connec-
tor !2, connect it to connector (CN38) !3 located
on the circuit board. After connecting, securely
lock the connector.
(Caution) Be sure to turn OFF the power before
connecting the connector.
6) To use the pedal unit with the sewing machine
for standing work, insert PK70 connector !4 into
connector !5 (CN39: 12P) on the PCB.
(Caution) Be sure to turn OFF the power before
connecting the connector.
!4
(Caution) 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 connectors
are inserted properly. In addition, not only the problem of error warning or the like occurs, but
also the sewing machine and the control box are damaged.
[How to bundle all cords]
7) After inserting the connector, put all cords togeth-
er with cable clip band !6 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, re-
!6
Howtoxcableclipband
How to remove cable clip band
mov e it fro m the wir e saddl e and
remove it while pressing the hook of
the cable clip band.
Panel
Pull
Push the
hook.
– 7 –
Panel
Push
Pushing the
hook portion,
push the band
to remove it.
B
3
8) Close cover
screw
(Caution) Take care not to allow the cord to be
with a screwdriver.
B
caught under cover 3.
and fix the cover by tightening
3
@0
!9
[ForCEspecicationsonly]
!8
!7
@1
9) Connect connector 4P
to connector
!7
!
locat
8
ed
on the side of the box.
10) Connect motor
outpu
t cord !9 of the power switch
to connector @0.
Connect motor output cord @1 to connector @2 located on the side of the box.
CE 1ø 230V
@2
Brown
Blue
Green / Yellow
(ground wire)
AC
220V-240V
Installing power switch
Connect power supply cord to the power switch.
[CEspecications]
Single phase 230V : Power supply cords :
Brown, Blue
and green/yellow (ground wire)
,
– 8 –
[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.
A
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
1
2
3
YELLOW
WHITE
BLACK
GREEN/
(Plug side)
B
Wiring for the 3-phase 200 V
(Box side)
WHITE
BLACK
RED
GREEN/
YELLOW
1
2
3
YELLOW
(Plug side)
WHITE
BLACK
RED
GREEN/
C
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
1
2
3
YELLOW
WHITE
BLACK
GREEN/
(Plug side)
1
By making the following two changes, the SC-922 can
be used with three different power supplies, i.e., singlephase 100 - 120 V, single-phase 200 to 240 V and
3-phase 200 to 240 V.
* Only the control box which uses PWR-T PCB can
be changed.
Replacement of the power cords
1
Changing-round of connector 1 on the PWR PCB
2
1) Turn OFF the power with the power switch after
checking that the sewing machine has stopped.
2)
Draw out the power cord from the power receptacle
after checking that the power switch has been turned
OFF. Then wait for 5 minutes or more.
3) Loosen the screws which are used to secure the
rear lid of the control box cover. Carefully open the
rear cover.
4) Changing procedure of the power voltage
(Caution)
If the supply power changing is carried out
in a wrong manner, the control box can
break. Be extremely careful when taking
the supply voltage changing procedure.
A. To change over the supply voltage from 200 - 240 V
to 100 - 120 V
Change the power cord with the JUKI genuine cord
・
with the part number (M90355800A0). Change
the earth cord with the one with the part number
(M90345800A0).
Change over supply voltage changeover connector 1
・
mounted on the PWR PCB with the connector for 100 V.
Connect the crimp style terminal of AC input cord to
・
the power plug as shown in the gure A.
B,C. To change over the supply voltage from 100 - 120
V to 200 - 240 V
Change the power cord with the JUKI genuine cord
・
with the part number
Change over supply voltage changeover connector 1
・
M90175800A0).
（
mounted on the PWR PCB with the connector for 200 V.
Connect the crimp contact of the AC input cord to the
・
power plug as illustrated in Fig. B for the 3-phase power
supply or as illustrated in Fig. C for the single-phase one.
5) Before closing the rear lid of the cover, ascertain again
that the relevant parts have been correctly changed
without fail.
6) Close the read lid while pressing it, taking care not to
allow the wiring to be caught between the read lid of
the cover and the main body of the control box. Then,
secure the lid with the screws.
(Caution) Be sure to remove the
connector while holding its locking section
with your fingers. Be
extremely careful not
to pull the connector
Locking section
forcibly.
– 9 –
[In case of using the power switch for LA]
@1
@2
JA 3ø 220V
JA 1ø 120V
Black
Red
White
Green / Yellow
(ground wire)
Black
White
Green / Yellow
(ground wire)
AC
200V-240V
AC
100V-120V
Connect motor output cord @1 to connector @2 located on the side of the box.
Installing power switch
Connect power supply cord to the power switch.
[JAspecications]
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)
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
A
1
the machine table as illustrated in the sketch.
Loosen screw B in underside cover
2
to open
A
the cover.
B
Change over the cord shown in the red-line circle
3
following the steps of procedure described below.
– 10 –
F
C
D
E
Remove two screws C to remove clamping plate
4
from the main body of the control box.
D
Remove connector E while holding its locking
5
section
with your ngers.
F
F
D
G
Turn connector G to remove the cord locking
6
section.
Loosen nut H to remove the connector from
7
clamping plate D.
H
– 11 –
I
J
D
Put locknut I on the power cord and draw out
8
the cord J from inside clamping plate D.
J
I
J
I
D
Install clamping plate D back to the control box.
9
Pass power cord J through conduit K.
!0
Fix conduit K with locknuts I with clamping
!1
plate D placed between the locknuts.
K
B
A
– 12 –
Close underside cover A and secure the cover
!2
with screw B.
@3
@3
11) Make sure that the power switch is turned OFF
and insert power supply cord coming from the
power switch into the power plug socket.
(Caution) 1. Top end of power supply cord var-
ies in accordance with destination or
supply voltage. Check again the sup-
ply voltage and the voltage designat-
ed on the control box when installing
the switch.
2. Be sure to prepare power plug
conformed to the safety standard.
3. Be sure to connect the ground wire (
green / yellow).
@3
8. 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.
2
1
3
B
A
1) Fix connecting rod 1 to installing hole B of ped-
al lever 2 with nut 3.
2) Installing connecting rod 1 to installing hole
A
will lengthen the pedal depressing stroke, and
the pedal operation at a medium speed will be
easier.
– 13 –
9. 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
of SC-922" p.25
tion setting No. 95.
543
543
6
2) The type of machine head can be
selected by pressing switch 5 (
* Refer to the "List of machine heads"
on the separate sheet or the Instruc-
tion Manual for the machine head of
your sewing machine for the type of
the machine head.
6
"III-6. Setting of functions
, and call the func-
switch
6
).
3) After selecting the type of machine
head, by pressing switch 3 (
switch
94 or 96, and the display automati-
cally changes to the contents of the
setting corresponding with the type
of machine head.
543
6
), the step proceeds to
4
– 14 –
10. Adjusting the machine head (direct-drive motor type sewing machine only)
(Caution) 1. When the slip between the marker dot on the handwheel and the concave of the cover is ex-
cessive after thread trimming, adjust the angle of the machine head by the operation below.
2. The machine head parts of which are connector to CN33 or CN43 does not need adjustment.
(Refer to “II-7. Connecting the cords” p. 5.)
3
A
54
6
B
1) Simultaneously pressing switch
and switch 5, turn ON the
4
power switch.
2) is displayed (A) in the indica-
tor and the mode is changed over to
the adjustment mode.
3) Turn the pulley of the machine head
by hand until the main-shaft reference
signal is detected. At this time, the de-
gree of an angle from the main-shaft
reference signal is displayed on the
indicator B.
(The value is the reference value.)
8
543
6
7
4) In this state, align marker dot 7 on the pulley
with recess 8 on the pulley cover.
5) Press switch
adjustment work. (The value is the
reference value.)
to nish the
6
543
6
– 15 –
III. FOR THE OPERATOR
1. Operating procedure of the sewing machine
1) Press ON button 1 of the power switch to turn
ON the power.
(Caution) If the power indication LED does not
light up even when turning ON the power
switch, immediately turn OFF the power
switch and check the voltage.
In addition, in such a case as this, re-turn
12
2) For some machine head installed, the needle bar automatically rotates to its upper position if the needle
bar is not there.
(Caution) WhenthepowertothesewingmachineisturnedONforthersttimeafterinstallation,itmay
require a longer time to get ready for operation since it carries out initialization procedure. In
addition, be sure not to place hands or any other article under the needle since the needle bar
may move when the power is turned ON.
3) When depressing front part
sewing machine rotates at the number of revolu-
tions in accordance with the depressing amount.
5
4
When the pedal is returned to the neutral posi-
tion, the sewing machine stops.
4) When lightly depressing back part 4 of the
3
pedal, the presser goes up. (PFL type only)
5) When strongly depressing back part 5 of the
pedal, thread trimming is performed.
Presser foot operation
6
by pedal
Pedal depressing depth
for thread trimming
6) For some types of the sewing machine heads, it
is possible to program various sewing patterns,
using the operation panel, such as the reverse
feed stitching at sewing start and that at sewing
end. When you use CP-18 6 with your sewing
machine, refer to
the sewing pattern" p.18
use any other operation panel with your sewing
machine, refer to the Instruction Manual for the
respective operation panel. (The gure given illustrates the case of the LU-1510N-7.)
ON the power switch when 2 to 3 minutes or more have passed after turning
OFF the power switch.
of the pedal, the
3
PFL KFL
Enabled Disabled
Deep Shallow
"III-3. Operating procedure of
for details. When you
7
7) For some types of the sewing machine heads, reverse feed is performed by pressing touch-back
switch 7. (The gure given illustrates the case of
the LU-1510N-7.)
2
8) When sewing is completed, press OFF button
the power switch to turn OFF the power switch after
conrming that the sewing machine has stopped.
– 16 –
2
of
2. Operation panel (CP-18)
1
2
A
1
C
D
3
switch : Used for changing over effective/ineffective of the reverse feed stitching pattern.
switch : Used for changing over effective/ineffective of the overlapped stitching pattern.
4 5 62
B
E
7
3
4
5
6
7
Indicators
LED
: Lights up when the reverse feed stitching pattern is effective.
C
switch : Used for conrming the contents of setting and for changing over effective/ineffective of
the 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.
* The selected process ashes on and off.
switch : Used for changing the content of the selected display (ashing section) and for changing
over effective/ineffective of the reverse stitch at sewing end.
switch : Used for changing the content of the selected display (ashing section).
switch : Used to call the production support function or one-touch setting (by keeping the switch
held pressed for one second).
A
and
: Various pieces of information are displayed.
B
LED D : Lights up when the overlapped stitching pattern is effective.
LED E : Lights up when the production support function is displayed.
Flashes on and off when invoking the one-touch setting.
– 17 –
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