JUKI SC-910N User manual

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ENGLISH
SC-910N
INStruCtIoN MaNuaL

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CONTENTS
!. SPECIFICATIONS ..................................................................................... 1
@. SET-UP...................................................................................................... 1
1. Installing M91 small sized motor unit ...............................................................................................1
2. Installing to the table..........................................................................................................................2
3. Adjusting the belt (when M91 is used)..............................................................................................2
4. Adjusting the belt cover (when M91 is used)...................................................................................3
5. Connecting the cords.........................................................................................................................4
6. Attaching the connecting rod.......................................................................................................... 11
7. Setting procedure of the machine head .........................................................................................12
8. Machine head list..............................................................................................................................13
9. Adjusting the machine head (DDL-9000A only) ............................................................................. 14
#. FOR THE OPERATOR ............................................................................ 15
1. Operating procedure of SC-910N ....................................................................................................15
2. Explanation of the operation panel................................................................................................. 17
3. Operating procedure of the sewing pattern ................................................................................... 18
(1) Reverse stitching pattern ..............................................................................................................18
(2) Overlapped stitching pattern.........................................................................................................19
(3) Special setting ..............................................................................................................................20
4. Setting for functions of SC-910N.....................................................................................................22
5. Function setting list..........................................................................................................................24
6. Detailed explanation of selection of functions ..............................................................................31
7. Automatic compensation of neutral point of the pedal sensor ................................................... 40
 8.Selectionofthepedalspecications..............................................................................................40
9. Setting of the auto lifter function ....................................................................................................41
10. Connection of the pedal of standing-work machine .....................................................................41
11. External input / output connector ...................................................................................................42
12. Connection of the material end sensor (ED)..................................................................................42
13. Initialization of the setting data .......................................................................................................43
$. MAINTENANCE ...................................................................................... 44
1. Removing the rear cover..................................................................................................................44
2. Replacing the fuse........................................................................................................................... 44
3. Error codes........................................................................................................................................45

– 1 –
ENGLISH
!. SPECIFICATIONS
@. SET-UP
SC-910N control box can be used for DD (direct-drive) system machine head and the belt-drive system
machine head by connecting the separately-available small-sized motor unit (M91).
When using the small-sized motor unit, it is necessary to install the motor unit to the control box before in-
stalling the control box to the table.
Install the motor unit to the control box following the instructions below.
SC-910N control box
M91 small-sized motor unit (separately-available article)
1. Installing M91 small sized motor unit
1) Lay down the control box while the rear cover is
placed under the control box.
2) Remove tie-mount A.
3) Adjust the hole section of the installing base of
M91 to the hole section of the installing plate.
4) Temporarily tighten ve places with counter-sunk
screws 1supplied with the unit as accessories.
5) Securely tighten them with hexagonal wrench
key 2 supplied with the unit as accessories.
(Caution) 1. When tightening the screw, se-
curely insert the hexagonal wrench
key into the screw hole section to
tighten.
2. Hexagonal wrench key is attached
to M91.
3. Be careful that the motor shaft does
not hit against anything. (If a strong
shock is given to the motor shaft,
there is the possibility that the mo-
tor is damaged.)
Supply voltage Single phase 100 to 120V 3-phase 200 to 240V Single phase 200 to 240V
Frequency 50Hz/60Hz 50Hz/60Hz 50Hz/60Hz
Operating envi-
ronment
Temperature : 0 to 40˚C
Humidity : 90% or less
Temperature : 0 to 40˚C
Humidity : 90% or less
Temperature : 0 to 40˚C
Humidity : 90% or less
Input 350VA 350VA 350VA
1
2
A

– 2 –
2. Installing to the table
1) Install the control box to the table with the tting
bolt (asm.) supplied with the unit as accessories.
At this time, insert the nut and washer supplied
with the unit as accessories as shown in the g-
ure so that the control box is securely xed.
2) Set the machine head to the table after installing the control box (or with small-sized motor) to the
table. (Refer to Instruction Manual for the sewing machine.)
3. Adjusting the belt (when M91 is used)
1) Adjust the belt tension by turning upper and lower
nuts 1 of the adjustment bolt and adjusting the
height of the center of the motor so that the belt
sags 15 mm (9.8N) when the center of the belt is
pressed by hand.
(Caution) 1. When the belt tension is exces-
sively low, medium or low speed
rotation becomes uneven, or stop
accuracy is deteriorated. When the
tension is excessively high, dete-
rioration of the motor is advanced.
So, be careful.
Approx. 15mm / 9.8N
1
Plain washer
Spring washer
Hexagonal nat

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ENGLISH
4. Adjusting the belt cover (when M91 is used)
1) Adjusting the clearance of the cover
Loosen cover setscrew 1and adjust so that the
left and right clearances between the belt cover
and the belt are equal to each other.
(Caution) 1. Perform the adjustment of the cov-
er with the hexagonal wrench key
supplied with the unit as accesso-
ries. At this time, be careful that the
screw is not excessively loosened.
2) Adjusting the roll-in prevention pin
Adjust the roll-in prevention pin with the hexago-
nal wrench key supplied with the unit as acces-
sories so that the clearance between the belt and
roll-in prevention pin 2is approximately 4 mm.
(Caution) 1. Be careful of the direction of rota-
tion of the motor and determine the
position of the pin. (Position shown
in the figure is the installing posi-
tion when the motor rotates in the
direction of the arrow mark.)
2. Perform the adjustment of the cov-
er with the hexagonal wrench key
supplied with the unit as accesso-
ries. At this time, be careful that the
screw is not excessively loosened.
3) Adjusting the off-belt prevention pin
Adjust the off-belt prevention pin with the hexag-
onal wrench key supplied with the unit as acces-
sories so that the clearance between the belt and
off-belt prevention pin 3is approximately 3 mm.
(Caution) 1. Perform the adjustment of the cov-
er with the hexagonal wrench key
supplied with the unit as accesso-
ries. At this time, be careful that the
screw is not excessively loosened.
4) Installing the belt cover
Adjust the notch section of the pulley outer cover
4to the gap of screw 5of the pulley inner cov-
er and insert the outer cover to the inner cover.
5) Tighten screw 5to complete the adjustment of
the cover.
1
2
4
5
3
4mm
3mm

– 4 –
Following connectors are prepared on the front face of SC-910N. Connect the connectors coming from the
machine head to the corresponding places so as to t the devices mounted on the machine head.
1CN30 Synchronizer : it detects the needle bar
position.
2 CN35 CP-170 panel : Various kinds of
programmed sewing can be executed.
(Refer to the Instruction Manual for each
panel for the details of functions.)
3CN31 Machine head connector 4P
4CN42 External input/output connector : input/
output of up/down detection signal, rotation
prohibition signal, etc. is prepared.
5CN48 Safety switch (standard) : When tilting the
sewing machine without turning the power
OFF, the operation of the sewing machine is
prohibited so as to protect against danger.
Optional switch : by changing over the
internal functions, 6 kinds of functions can
be selected.
6CN40 Presser foot lifter solenoid. (For automatic
presser foot lifter type only)
7CN46
Machine head solenid : Thread trimming, reverse-
stitching solenoid, touch-back switch, etc.
8CN47 Optional circuit board connection connector
: Required when using JUKI standard
bobbin thread remaining amount detection
sensor, etc.
9CN39 Motor signal connector
!0 CN32 Standing machine pedal : JUKI standard
PK-70, etc. Sewing machine can be
controlled with the external signal.
!1CN34 IP-110 panel (LCD panel) : Various kinds of
programmed sewing can be executed.
!2 CN45 Material end detection sensor ED-5, etc.
!3 CN43 Fan
* By adding the optional unit A, the following optional
devices of JUKI standard can be connected.
1CN128 Left/right needle detection
2CN127 Thread holding, thread suction, thread
drawing
3CN122 Needle cooler (bottom fan)
4CN121 Bobbin thread remaining amount detection
5CN120 +24V external power source
6CN123 Needle/bobbin thread remaining amount
detection sensor
7CN125 External interface I/F D/A Input
8 CN126 Left/right lock SW, LED
9CN129 Thread holding, thread suction, thread
drawing, bobbin thread remaining amount
detection.
WARNING :
• To prevent personal injury caused by abrupt start of the sewing machine, carry out the work after
turning OFF the power switch and a lapse of 5 minutes or more.
• To prevent damage of device caused by maloperation and wrong specifications, be sure to
connectallthecorrespondingconnectorstothespeciedplaces.
• To prevent personal injury caused by maloperation, be sure to lock the connector with lock.
• As for the details of handling respective devices, read carefully the Instruction Manuals supplied
with the devices before handling the devices.
5. Connecting the cords
Optional unit A
1
2
3
4
5
6
7
8
9
1
7
2
6
3
4
5
9
!0
8
!2
!3
!1

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ENGLISH
1) Pa ss t he c or ds 1of the thread trimming
solenoid, reverse-stitching solenoid, etc., and
the cords of the synchronizer 2, safety switch
3, machine head 4P connector 4, motor signal
5, motor output 6through hole Ain the table to
route them down under the machine table.
2) Loosen setscrew 8in front cover 7.
3) Pressing the side of front cover 7in the direction
of the arrow, open the front cover toward you.
Note : Be sure to open / close the front cover
with your hands.
4) Connect 14P code 1coming from the machine
head to connector A(CN46).
5) Connect 4P connector coming from the machine
head 4to connector B(CN31). (It is not neces-
sary in case of DDL-9000A.)
6) Connect 4P connector 3(safty switch connec-
tor) coming from the machine head to connector
C(CN48).
7) Connect 7P connector 2coming from the ma-
chine head to connector D(CN30).(It is not nec-
essary in case of DDL-9000A.)
8) Connect connector 5coming from the machine
head (motor) to connector E(CN39).
9) When the optional AK138 device is attached,
connect 2P connector 9coming from the AK de-
vice to connector F(CN40).
(Caution) 1. WhenusingtheAKdevice,setwhethertousetheAKdeviceafterconrminghowto
select the auto-lifter function. (Refter to “#-9. Setting of the auto lifter function” p. 41.)
2. Be sure to securely insert the respective connectors after checking the inserting di-
rections 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 ac-
tuated 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.
5
2
1
4
3
6
A
7
8
2
A
D
4
3
F
E
C
B
5
1
9

– 6 –
[ Connection of the connector for CP panel ]
Exclusive connectors are prepared for connection of
the connector for CP-170.
Paying attention to the orientation of the connec-
tor, connect it to connector Blocated on the circuit
board. After connecting, securely lock the connector.
[ Connecting for IP panel ]
The connector for connecting IP-110 is prepared.
When connecting, insert the connector until it is
locked to C.
11) After inserting the connector, put all cords to-
gether with cable clip band !2 located on the side
of the box.
At this time, bundle the connectors which are
arranged above the wire saddle to wire saddle
!3 and those which are arranged below the wire
saddle to wire saddle !4.
(Caution) 1. Fix the cord clamp and the cable
clip band following the attaching
procedure.
2. When removing the connector, re-
move it from the wire saddle and
remove it while pressing the hook
of the cable clip band.
10) Fix all cables coming from the machine head
with cable clip band !0 attached to tie-mount !1.
!3
!2
!4
!0
!1
B
C

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ENGLISH
(Caution) 1. Fix the cable clip band following
the attaching procedure as shown
inthegure.
2. To remove the cable clip band,
push the cable clip band until it
comes off while pressing the hook
of the band following the removing
procedureasshowninthegure.
14) Connect motor output cord 6to connector G
located on the side of the box. Connect connec-
tor 4P !5 of the power switch to connector H.
(Caution) Route the motor output cord from the
front face of the box.
12) Close front cover 7while paying attention to
pinching of the wire.
Lightly press portion Dand insert front cover 7
with “click”.
13) After that, x it with the screw 8.
Howtoxcableclipband!2
Pull
How to remove cable clip band
Push
Pushing the hook portion, push the band to remove it.
Push the hook.
Pull
Push
7
D
8
6
!5
H
G

– 8 –
17) Connect connector 5coming from the power
source cord to lower connector 6 after checking
the direction.
(Caution) When rubber bush 7is off the install-
ing plate, adjust it to the groove of the
installing plate and insert it.
15) Remove three screws 1located on the side of
the control box.
16) Set power source cord set 3and installing
plate 4supplied with the unit as accessories as
shown in the gure, and x them to the control
box main unit with three setscrews 2which have
been removed.
18) Connect motor output cord 8to connector 9located on the side of the box.
19) Fix power source cover !0 supplied with the unit using two screws !1 supplied with the unit.
(Caution) At this time, be careful so that the motor output cord is not caught by the power source
cover and so that the cord enters the recess of the power source cover.
[ForCEspecicationsonly]
CE 1ø 230V
AC
220V-240V
1
3
8
4
2
7
5
6
9
!1
!0
20) Installing power switch
Connect power supply cord to the power switch.
[CEspecications]
Single phase 230V : Power supply cords : Brown, Blue,
and green/yellow (ground wire)
Brown
Blue
Green / Yellow
(ground wire)