JUKI AW-3SD User manual

1
INSTRUCTION MANUAL
Ver：1.00
AW-3SD

i
CONTENTS
1. GENERAL ..........................................................................................1
1-1. Specications of AW-3SD .............................................................................................. 1
1-2. Conguration .................................................................................................................. 2
2. INSTALLATION .................................................................................. 4
2-1. Installing the AW-3SD ..................................................................................................... 4
2-2. Installation location ........................................................................................................ 4
3. OPERATION PROCEDURE............................................................... 5
3-1. Opening/closing the cover door.................................................................................... 5
3-2. Removing the device cover ........................................................................................... 6
3-3. How to thread the device with the bobbin thread........................................................ 7
3-4. How to set a bobbin........................................................................................................ 9
3-5. Length of remaining thread to be removed................................................................ 11
3-6. Device operation lamp.................................................................................................. 11
3-7. Behavior of the AW-3SD device when the power is turned ON ................................ 12
3-8. Program mode list ........................................................................................................ 12
3-9. Basic operation and setting......................................................................................... 15
3-10. Operating the AW ........................................................................................................ 16
3-11. Setting the AW number-of-stitches input mode, AW operation mode and
remaining-thread allowance length......................................................................... 19
3-12. Example of operation ................................................................................................. 24
3-13. Turning OFF of the power .......................................................................................... 29
3-14. Error display and error handling procedure ............................................................ 29
3-15. Detection of errors related to the AW........................................................................ 31
3-16. List of errors................................................................................................................ 32
3-17. Cautions....................................................................................................................... 33
4. MAINTENANCE ............................................................................... 34
4-1. Attaching / removing the cover ................................................................................... 34
4-2. Cleaning......................................................................................................................... 35
4-3. Replacing the fuse ........................................................................................................ 37
4-4. Replacing the gripper tube .......................................................................................... 37
4-5. Adjusting the air ow for the remaining thread guide .............................................. 38
5. TROUBLESHOOTING ..................................................................... 39

– 1 –
1. GENERAL
1 Applicable bobbin, bobbin case Exclusive double-capacity bobbin and bobbin case.
2 Applicable thread count #5 to #30 (Japan), 135 to 45 (TEX), 020 to 060 (TKT)
3 Applicable type of thread Synthetic thread
4 Remaining-thread removal and
bobbin winding operation
Possible while the sewing machine is in operation.
5Condition setting according
to the thread type
Conditions to be met to unravel the thread at the beginning of wind-
ing a bobbin can be set.
6Line voltage 200,220,240 Vac ±10 %, Single phase 50/60 Hz
7Power consumption 100 VA
8Air pressure used 0.4 to 0.5 MPa
* Adjustment of the air pressure may be required depending on the
thread to be used. (The air pressure for the AW-3SD has been
factory-set to 0.5 MPa at the time of shipment.)
9Air consumption 156 Nℓ / min (max. value)
10 Dimensions 700 mm (W ) × 650 mm (L ) × 430 mm (H ) (Accessories included)
11 Mass of the device 38 kg
12
Operating temperature range
5 ˚C to 35 ˚C
13
Operating humidity range
35 % to 85 % (No dew condensation)
14 Noise - Equivalent continuous emission sound pressure level (LpA) at
the workstation : A-weighted value ≦ 80.0 dB ; (Includes KpA =
2.5 dB) ; according to ISO 10821- C.6.2 -ISO 11204 GR2.
Conventionally, a series of operations including the replacement of a bobbin in the sewing machine hook,
removal of thread remaining on a bobbin, winding of a bobbin, threading of the bobbin case tension spring,
threading of the thread guide claw hole and trimming of thread have been carried out manually. Now, this
device is developed to carry out the series of operations full-automatically. This device is provided with new
functions in addition to the conventional AW-3's functions, thereby not only helps increase e󰀩ciency of sew-
ing work but also improves convenience.
Refer to the technical data on the JUKI industrial computer-controlled sewing machine PLK-J, "Sewing
machine head", "Operation panel" and "Control device" for information about the main body of the sewing
machine.
1-1. Specications of AW-3SD

– 2 –
1-2. Conguration
* The illustration shows the PLK-J6040R.
❸
❹
❺
❻
󱢴
󱢵
❶
❾
󱢶
❽
󱢳
󱢷
❷
❼

– 3 –
Name Function
❶Main body of device It is mounted under the sewing machine bed and is the mechanical
section of the device which carries out replacement of the bobbin,
removal of thread remaining on the bobbin, winding of thread on a
bobbin, threading, thread trimming and thread unraveling automatical-
ly.
❷Angle section It connects the main body of the AW device to the sewing machine
bed.
❸Carrier arm It is the mechanism for carrying a bobbin case to the hook, bobbin
setting section, remaining thread removal section and bobbin winding
section.
❹Bobbin setting section It serves as an intermediary place used in the case of putting/removing
a bobbin on/from the device.
❺Remaining thread removal
section
It is the mechanism for removing the thread remaining on the bobbin
taken out from the hook. It consists of the remaining thread removal
roller, suction vacuum, etc.
❻Thread unraveling section It is the mechanism for unraveling the tip of thread to be wound on a
bobbin at the beginning of bobbin winding. It consists of the bobbin
unraveling roller, etc.
❼Nozzle Thread from the bobbin thread cone comes from the tip of the noz-
zle by way of the thread path. The thread coming out of the nozzle is
wound on a bobbin.
❽Bobbin thread winding
section
It is the mechanism for winding thread on a new bobbin, threading the
bobbin case and trimming the thread. It consists of the clutch plate,
threader, thread trimming knife, etc.
❾Thread feeding unit It is used to feed the thread bit by bit from the tip of the nozzle and
accurately measure the length of thread wound on a bobbin during
bobbin winding.
󱢳Electrical control box of
the device
It is the box which contains the PCB for controlling the operation of
the device. This electrical control box is di󰀨erent from the one for the
sewing machine.
󱢴Device operation lamp It indicates that the device is in operation.
󱢵Dust bag It is the place to store the remaining thread removed from the bobbin.
󱢶Cover It is used to prevent the operator from coming in contact with the mov-
ing part of the device.
󱢷Power source distribution
box
It distributes the power source to the sewing machine side and the AW
device side.

– 4 –
2. INSTALLATION
2-1. Installing the AW-3SD
Refer to the "Engineer's Manual for the AW-3SD" for details.
2-2. Installation location
For the installation location, carefully check the following points.
(1) This device uses an optical sensor. In order to protect the optical sensor from malfunctioning, do not in-
stall the device near a window or in any other location where it is likely to be exposed to direct sunlight.
Alternatively, install the device in a direction where it will not be exposed to direct sunlight.
(2) In order to avoid malfunctioning, do not use the device near any equipment that generates large elec-
trical noise. In addition, it is preferable to keep the power supply line away from the aforementioned
equipment.
* Be aware that the warranty may no apply if the aforementioned conditions are not met.

– 5 –
3. OPERATION PROCEDURE
3-1. Opening/closing the cover door
It is necessary to open cover door ❶on the top of the table to set up a bobbin in the device. When you want
to open cover door ❶, twist switch ❷on the front face of the sewing machine by hand in the direction of the
arrow in the gure. Then, the end portion of the cover door goes up from the top of the table. Remove cover
door ❶holding its end portion with your hand.
To close cover door ❶, insert protruding portion ❸of cover door ❶until it comes in contact with the table
opening section and release your hand from it. Cover door ❶is closed by twisting switch ❷in the opposite
direction of the arrow in the gure.
Be sure to close cover door ❶ for the sake of safety whenever you carry out sewing.
In addition, if cover door ❶ is not closed securely, the sensor will detect that the door is in
the opened state to disable starting of sewing.
It should be noted, however, origin retrieval and inching operation are allowed to start. So,
be careful.
WARNING :
Turn OFF the power before starting the work so as to prevent accidents caused by abrupt start of
the sewing machine.
❶
❷
❶
❸

– 6 –
3-2. Removing the device cover
It is necessary to remove device cover ❶when passing the bobbin thread or conducting maintenance.
Loosen hand-turned knob ❷ as shown in the gure. Then, shift device cover ❶to the left to remove the de-
vice cover ❶downward.
Be sure to close device cover ❶ for the sake of safety whenever you carry out sewing.
❶
❷

– 7 –
3-3. How to thread the device with the bobbin thread
In order to accurately measure the length of thread from the bobbin thread cone ❶to be wound on a bobbin,
guide the thread from the bobbin thread cone ❶through the bobbin thread feeding unit and draw the thread
out from the nozzle as illustrated in the gure.
Install the spool holder disk to the lowest possible position. If it is installed at a high position, an excessive
tension will be applied to the thread drawn from the bobbin thread cone ❶, causing a trouble.
❶❶
❾❾
❺❺
❻❻
❼❼
❽❽
❷❷
❸❸
❹❹
1) Insert the power plug to a receptacle and turn ON the power to the device. Press , Wait until initial-
ization operation of the device is completed. (Approx. 10 seconds)
2) Pass the thread drawn from bobbin thread cone ❶through thread tension controller ❷.
3) Wind the thread on thread length measuring roller ❸by one layer.
4) Pass the thread through thread guide ❻by way of tension controllers ❹and ❺.
It should be noted that the tube extending between thread tension controllers ❹and ❺is intended to
prevent thread from tangling on the shaft of the respective thread tension controllers. Pass the thread
through the space inside the curved part of tube ❾.
5) Pass the thread through the hole in the tip of thread feed arm ❼.
6) Press Aon the standard screen 2. When the AW operation panel is displayed, press B.
Be aware that the thread feed arm ❼ may operate when B is pressed.
A
B

– 8 –
󱢴
󱢳
When the thread is put in thread path tube ❽,
it is sucked. Put the thread in the tube, while
pulling the thread from the bobbin thread cone,
until the length of thread coming out of the tip of
nozzle 󱢳becomes approximately 13 cm. If the
thread stops halfway, pull it back slightly several
times.
At this time, the bobbin winder nozzle is at
its advanced position. In this state, adjust the
length of thread while observing the scale on
label 󱢴as a guide.
7) Suction is stopped by pressing B
again.

– 9 –
3-4. How to set a bobbin
This device uses two bobbin cases each of which is tted with a bobbin.
(1) How to t a bobbin in the bobbin case
Load the bobbin case tted with a bobbin, as de-
scribed in (1), in bobbin setting section ❷ of the
device.
Open the cover door according to "3-1. Opening/
closing the cover door" p.5. Put your hand
through the cover door to place a bobbin in the de-
vice.
Set the bobbin case in such a way that its opening
section ❸aligns with lock member ❹.
Place the bobbin case in the device with the claw
of bobbin case raised. Push the bobbin case in the
device fully until it will go no further.
Before tting a bobbin in the bobbin
case, wipe the bobbin case to remove
oil and dust. In particular, wipe the
shaft section of bobbin case to remove
oil and dust. In addition, blow out, with
an air gun, oil and dust gathering under
the bobbin idling prevention spring in
the bobbin case.
Fit a bobbin in the bobbin case so that clutch holes
❶(at two locations) of bobbin are brought to the
open side.
❶
(2) How to load a bobbin in the device
❹
❷
❸
If the bobbin case is not correctly placed in the bobbin setting section ❺ of the device, an
error such that the gripper fails to catch the bobbin case can occur.
If the bobbin case is not correctly placed in the device, the bobbin case can drop from the
device without raising its claw.
After you have set the bobbin case in the device, make sure that the bobbin case has not
dropped from the device.
(3) How to remove/set the bobbin from/in the hook section
1) Turn the power ON.
2) When you press Aon the standard
screen 2, the AW operation screen is displayed.
A

– 10 –
❷
3) Take out the bobbin from bobbin setting section
❷by hand.
4) When you press Bicon on the AW
operation screen, the bobbin placed in the de-
vice (or in the hook) is carried to bobbin setting
section ❷.
5) Take out the bobbin from bobbin setting section
❷by hand.
When you want to take out the bob-
bin that is placed in the hook, be sure
to rstly press Bto carry the
bobbin from the hook to the bobbin
setting section. Then, take out the
bobbin from the bobbin setting sec-
tion. If you directly remove the bobbin
from the hook, the sewing machine
may run with no bobbin placed in the
hook.
6) Place the rst bobbin in bobbin setting section
❷by hand.
・
In the case of an empty bobbin, press
C.
・
Press Din the case of a bobbin that
has already been wound with thread.
The bobbin is carried to the hook.
7) Subsequently, place the second bobbin in bob-
bin setting section ❷.
・
As with step 6), press Cin the case
of an empty bobbin.
・
Press Din the case of a bobbin that
has already been wound with thread.
8) Press Eto return to the standard screen 2.
If one of the bobbins placed in the bobbin setting
section is an empty bobbin, the device will wind
thread on the bobbin. After the device completes
winding of the bobbin, it will enter the standby state
in preparation for bobbin replacement.
B
E
D
C

– 11 –
3-5. Length of remaining thread to be removed
During the remaining-thread removal operation, bob-
bin clutch holes ❶turn as the bobbin rotates. The
device recognizes that the remaining thread is being
removed by detecting turning of the bobbin clutch
holes ❶.
The maximum length of remaining
thread that can be removed in 8 m.
Be aware that a remaining-thread re-
moval error may occur if the bobbin is
wound with thread to such an extent
that the bobbin clutch holes ❶ are
hidden by the thread.
If the remaining thread length ex-
ceeds 8 m, change the setting under
the program mode. ( Refer to "3-8.
Program mode list ●AWRL : Setting of
the upper limit of the remaining thread
removal amount" p.14.)
3-6. Device operation lamp
Lamp ❶mounted next to the power switch indicates
that the device is in operation.
Lamp status Meaning
Light up (ON state) Indicates that the device is in operation. While the lamp lights up, the device is en-
gaged in removal of remaining thread from the bobbin or winding of a bobbin. Do not
turn the power OFF unless there is an emergency.
Light o󰀨 (OFF state) Indicates that the device is in the standby state. Make sure that the lamp has gone out
before turning the power OFF.
1. In the case the power is turned OFF while the lamp is in the ON state intentionally or
unintentionally due to power failure or the like, it is necessary to remove the cover to
check whether or not the device is tangled with thread. ( Refer to "3-2. Removing the
device cover" p.6.)
2. If the device is tangled with thread, remove the thread and draw out thread from the
bobbin winder nozzle by approximately 13 cm. Then, attach the cover back. ( Refer to "3-
3. How to thread the device with the bobbin thread" p.7.)
❶
❶

– 12 –
3-7. Behavior of the AW-3SD device when the power is turned ON
This device operates on the premise that bobbins wound with thread are placed in the
hook and bobbin setting section when the power is turned ON. If the power is turned ON
in any state other than the above, operate this device to load bobbins. (Refer to "3-9. Basic
operation and setting" p.15 for details.)
When or is pressed after the power is turned ON, the AW-3SD carries out its initialization opera-
tion if it is operated for the rst time.
3-8. Program mode list
Group Digital Function name Setting
range
Editing
unit Initial value
Bobbin
winding AWRC
Determination of the bobbin thread remaining
amount
(0: Manual, 1: Auto)
0 to 1 1 0
：
Manual
Bobbin
winding AWMV Manual threshold for the determination of the bob- bin thread remaining amount 1 to 9999 1100
Bobbin
winding AWWL Setting of the bobbin thread winding length 20 to 2000 150
：
5.0m
Bobbin
winding AWML Setting of the remaining thread allowance length 1 to 350 1 350
：
3.5m
Bobbin
winding AWCS Setting of the thread unraveling strength 0 to 5 1 0
Bobbin
winding AWEL Setting of the bobbin thread end pull-in amount 0 to 100 1 0
Bobbin
winding AWRW
Timing to determine the bobbin thread remaining
amount shortage
(0: By pattern, 1: By thread trimming)
0 to 1 1 0
：
By pat-
tern
Bobbin
winding AWTR
Enable/disable of the bobbin thread release at the
time of changing the bobbin
(0: Disable, 1: Enable)
0 to 1 1 0
：
Disable
Bobbin
winding AWSM Setting of the bobbin winding operation mode (0: Normal mode, 1: Power mode) 0 to 1 1 0
：
Normal
mode
Bobbin
winding AWNM Setting of the nozzle operation mode (0: Normal mode, 1: Power mode) 0 to 1 1 0
：
Normal
mode
Bobbin
winding AWRM
Setting of the remaining thread removal operation mode
(0: Normal mode, 1: Power mode) 0 to 1 1 0
：
Normal
mode
Bobbin
winding AWDM Setting of the threading operation mode (0: Normal mode, 1: Power mode) 0 to 1 1 0
：
Normal
mode
Bobbin
winding AWSA Setting of the retry of bobbin winding (0: Normal retry, 1: Short retry) 0 to 1 1 0
：
Normal
retry
Bobbin
winding AWRT
Setting of the remaining thread removal error de-
termination time
(0: Short, 1: Long)
0 to 1 1 0
：
Short
Bobbin
winding AWRL
Setting of the upper limit of the remaining thread
removal amount
(0: Limited (8 m), 1: Not limited)
0 to 1 1 0
：
Limited
(8 m)
Bobbin
winding AWDP Setting of the stop position at the time of threading (0: Normal, 1: Far side) 0 to 1 1 0
：
Normal
Bobbin
winding AWES ON/OFF of disabling of forced stop of the AW de- vice ON/OFF -OFF

– 13 –
●AWRC : Determination of the bobbin thread remaining amount,
AWMV
：Manual threshold for the determination of the bobbin thread remaining amount
Refer to "3-11-1. Bobbin thread remaining amount determination method" p.20.
●AWWL : Setting of the bobbin thread winding length
Refer to "3-11-2. Bobbin-thread winding length" p.21.
●AWML : Setting of the remaining thread allowance length
Refer to "3-11-3. Remaining thread allowance length" p.22.
●AWCS : Setting of the thread unraveling strength
Refer to "3-11-4. Thread unraveling strength" p.22.
●AWEL : Setting of the bobbin thread end pull-in amount
Refer to "3-11-5. Setting the bobbin thread end pull-in amount" p.22.
●AWRW : Timing to determine the bobbin thread remaining amount shortage
The timing to determine whether the remaining amount of bobbin thread is insu󰀩cient for the sewing pat-
tern is set.
If the bobbin thread amount is determined to be insu󰀩cient, change the bobbin.
0 : By pattern …… Determination is made at the start or end of sewing.
1 : By thread trimming …… Determination is made after thread trimming during sewing in addition to the
start or end of sewing.
●AWTR : Enable/disable of the bobbin thread release at the time of changing the bobbin
For the large model of the PLK-J, the thread trimming knife holds the bobbin thread. However, if the bob-
bin thread remains held when changing the bobbin, the bobbin sometimes may not be normally taken out
of the hook. To prevent this problem, the thread trimming knife is operated to release the bobbin thread.
●AWSM : Setting of the bobbin winding operation mode
In the case of using thick thread or bond thread that cannot be wound easily, the bobbin winding motor
operates more strongly to wind the thread on a bobbin.
Instead of the stronger operation of the motor, the speed is decreased, thereby increases the bobbin
winding time.
●AWNM : Setting of the nozzle operation mode
When using thick thread, the nozzle increases its force for remaining at the current position to prevent the
nozzle from slipping out of position since it is pulled by the thread during bobbin winding.
●AWRM : Setting of the remaining thread removal operation mode
When removing thick thread or bond thread from a bobbin, the remaining thread removal motor operates
more strongly to remove the thread from the bobbin.
Instead of the stronger operation of the motor, the speed is decreased, thereby increases the remaining
thread removal time.
●AWDM : Setting of the threading operation mode
When conducting threading after winding a bobbin, the bobbin carrier arm increases its force for re-
maining at the current position to prevent the bobbin from slipping out of position since it is pulled by the
thread.
●AWSA : Setting of the retry of bobbin winding
If the thread fails to be wound on a bobbin during bobbin winding, the thread is unraveled again and
wound on a bobbin. If unraveling of the thread is not necessary, this operation can be skipped.
0 : Normal retry …… Thread is unraveled every time it is wound on a bobbin.
1 : Short retry …… Thread is not unraveled at retry of bobbin winding.
●AWRT : Setting of the remaining thread removal error determination time
If the remaining amount of thread is large, an error may occur at the start of removal of the remaining
thread. In such a case, set this item to "1: Long".

– 14 –
●AWRL : Setting of the upper limit of the remaining thread removal amount
If the remaining thread length exceeds 8 m, set this item to "1: Not limited".
●AWDP : Setting of the stop position at the time of threading
When conducting threading after winding a bobbin, the thread sometimes slips out of the tension spring.
In such a case, set this item to "1: Far side".
●AWES : ON/OFF of disabling of forced stop of the AW device
OFF : The AW device stops in conjunction with a midpoint stop/error of the sewing machine. After the
device has stopped, turn the power OFF. If the device stops during removal of the remaining thread
or during winding of a bobbin, the thread may remain on the bobbin. In such a case, remove the
thread from the bobbin.
After turning the power ON, adjust the length of thread coming out of the nozzle following the steps 6)
to 7) in "3-3. How to thread the device with the bobbin thread" p.7.
ON : The AW device does not stop in conjunction with a midpoint stop/error of the sewing machine.

– 15 –
3-9. Basic operation and setting
The PLK-J is provided with the independent operation function for carrying out setup of the AW-3SD and the
setting function related to the automatic bobbin changing.
Open the AW operation screen when carrying out the independent operation, or the AW thread information
setting screen when carrying out setting.
* Both the AW operation screen and the AW thread information setting screen can be opened from
the standard screen 2.
Icons and display Description
A
The AW operation screen is opened up.
On the AW operation screen, setup of the AW such as loading/changing of
bobbins can be carried out.
B
The AW thread information setting screen is opened.
On the AW thread information setting screen, setting of data related to the
automatic bobbin changing such as the bobbin thread winding quantity can
be carried out.
While the AW-3SD is in operation and while the sewing machine is running (engaged in
sewing), there will be no response if you press AW operation icon A. (Icon operation
is disabled)
AB

– 16 –
3-10. Operating the AW
When you press Aon the standard screen 2,
the AW operation screen is displayed.
At this time, the bobbin check screen is displayed
when no bobbin is loaded in the device, or the error
screen is displayed when an AW error has occurred.
On these screens, the error will be reset by complet-
ing loading of a bobbin.
The AW operation screen is displayed after resetting
the error.
On the AW operation screen, the independent op-
eration of the AW can be carried out respectively by
pressing the below-stated icons.
Press Bto close the screen.
Ⓐ : Bobbin change icon
Ⓑ: Bobbin take-out icon
Ⓒ : Empty bobbin loading icon
Ⓓ : Threaded bobbin loading icon
Ⓔ : Nozzle air icon
Detailed explanation will be given from the next
page.
Be aware that an error can be caused
if the bobbin in hook ❶ is directly
changed, etc. by hand without oper-
ating the AW operation screen after
turning the power ON.
A
Ⓐ
Ⓑ
Ⓒ
Ⓓ
Ⓔ
B

– 17 –
Ⓐ: Bobbin change icon
This button is used for winding a bobbin with new
thread in the case of changing the thread, etc. When
you press Ⓐ, the bobbin placed in hook ❶
is changed with the bobbin in bobbin setting section
❷. Then, the thread remaining on the bobbin in
hook ❶is removed and new thread is wound on the
empty bobbin.
Ⓑ : Bobbin take-out icon
This button is used for taking out the bobbin loaded
in hook ❶. Take out the bobbin placed in bobbin
setting section ❷by hand before pressing
Ⓑ. When you press Ⓑ, the bobbin placed
in hook ❶is moved to bobbin setting section ❷.
Place an empty bobbin in bobbin setting section ❷. Then, press Ⓒ.
• If no bobbin is present in hook ❶, the empty bobbin placed as described above will be brought to hook ❶.
Then, the device waits until the display is restored to the previous one and the next bobbin is placed.
The device starts winding a bobbin when Ⓒor Ⓓis pressed after placing the next
bobbin in the hook ❶.
• If a bobbin is already present in hook ❶, the device will start winding of the bobbin.
Be sure to check that the bobbin to be loaded in the hook ❶ is empty before pressing
Ⓒ. If a threaded bobbin is loaded in the hook ❶, a malfunction can occur when
winding the bobbin or removing the thread remaining on the bobbin.
Ⓒ : Empty bobbin loading icon
This button is used for loading an empty bobbin in the hook ❶.
❶
❷

– 18 –
Ⓓ : Threaded bobbin loading icon
This button is used for loading a threaded bobbin in
the hook ❶.
Ⓔ: Nozzle air icon
This button is used for operating nozzle air ❺to feed thread ❹from nozzle ❸. Every time Ⓔis
pressed, nozzle air ❺status will be changed over between "ON" and "OFF".
Place a threaded bobbin in bobbin setting section ❷.
Then, press Ⓓ.
• If no bobbin is present in hook ❶, the thread-
ed bobbin placed as described above will be
brought to hook ❶. Then, the device waits until
next bobbin is placed at the bobbin case stand-
by position.
• If a threaded bobbin is present in hook ❶, the
device will stand ready as it is.
Be sure to check the bobbin to be
loaded in the hook ❶ is wound with
thread before pressing Ⓓ. If
an empty bobbin is loaded in the hook
❶, a malfunction can occur during
sewing.
Be aware that the thread feed arm may operate when Ⓔ is pressed.
❺
❹
❸