JUKI LBH-1796AN Instruction Manual
LBH-1796AN
INSTRUCTION MANUAL
CONTENTS
I. IMPORTANT SAFETY INSTRUCTIONS ..................................................... 1
II. SPECIFICATIONS ....................................................................................... 1
1. Specications .........................................................................................................................2
2. Standard sewing shape list ...................................................................................................3
3. Conguration .........................................................................................................................4
III. INSTALLATION .......................................................................................... 5
IV. PREPARATION BEFORE OPERATION .................................................. 21
1. Lubrication ...........................................................................................................................21
2. Inserting the needle ............................................................................................................. 22
3. Threading the needle-thread ...............................................................................................23
4. Threading the bobbin case .................................................................................................23
5. Adjusting the bobbin thread tension .................................................................................24
6. Installation of bobbin case ..................................................................................................24
7. Installing the knife ...............................................................................................................25
8. Item to be checked before turning the power ON ............................................................. 25
V. OPERATION OF THE SEWING MACHINE .............................................. 26
1. Explanation of the operation panel switch ........................................................................ 26
2. Basic operation of the sewing machine ............................................................................28
3. How to use the pedal ........................................................................................................... 30
4. Performing pattern selection .............................................................................................. 33
5. Changing needle thread tension ........................................................................................34
6. Performing re-sewing .......................................................................................................... 35
7. Winding bobbin thread ........................................................................................................ 36
8. Using the counter ................................................................................................................37
9. Using the initial value pattern ............................................................................................. 39
10. Changing sewing data ....................................................................................................... 40
11. Method of setting sewing data with/without edit ............................................................42
12. Sewing data list .................................................................................................................. 43
13. Copying sewing pattern ....................................................................................................49
14. How to edit/check the data other than sewing data .......................................................50
15. Using parameter register key ...........................................................................................52
16. Performing continuous stitching .....................................................................................53
17. Performing cycle stitching ................................................................................................ 57
18. How to change the name of cycle/continuous sewing data ..........................................59
19. Explanation of the service patterns .................................................................................60
20. Explanation of plural motions of knife .............................................................................62
21. Method of changing memory switch data .......................................................................63
22. Memory switch data list ....................................................................................................64
23.
How to change the sewing speed while the sewing machine is engaged in sewing ......... 68
i
24. How to adjust the pedal variable resistor ........................................................................ 69
25. How to adjust the contrast ................................................................................................ 70
26. How to set the key lock .....................................................................................................70
27. Communication .................................................................................................................. 71
28. Setting the irregular work .................................................................................................75
VI. MAINTENANCE ....................................................................................... 77
1. Adjusting the needle-to-hook relation ...............................................................................77
2. Adjusting the needle thread trimmer .................................................................................78
3. Adjusting the presser bar pressure ...................................................................................79
4. Adjustment of the bobbin presser unit ..............................................................................79
5. Thread tension .....................................................................................................................80
6. Replacing the fuse ............................................................................................................... 81
7. Adjusting the parallel lifting of the presser foot ...............................................................81
8. Accessory adhesive tape ....................................................................................................82
9. Auxiliary sheet .....................................................................................................................83
10. Material-feed auxiliary sheet (optional) ...........................................................................83
VII. GAUGE COMPONENTS ........................................................................ 85
1. Cloth cutting knife ...............................................................................................................85
VIII. ERROR CODE LIST .............................................................................. 86
1. How to operate the sewing machine in the case an error is displayed .......................... 86
2. Operation procedure to be followed when a message is displayed ............................... 91
IX. TROUBLES AND CORRECTIVE MEASURES ....................................... 92
X. DRAWING OF THE TABLE ...................................................................... 94
XI. INITIAL VALUE DATA FOR EACH SHAPE TABLE ............................... 95
ii
I. IMPORTANT SAFETY INSTRUCTIONS
1) Never operate the machine unless the oiling tank has been properly lubricated.
2) After the completion of a day's work, remove dust and dirt accumulating on the hook, bobbin thread
trimming knife section and lubricating hole of the oil tank. At this time, also check whether or not the oil
quantity is adequate.
3) Be sure to return the starting pedal to the home position after the machine has started to run.
4) This machine is provided with a machine head tilt detector so that it cannot be operated in the state
that the machine head is tilted. When operating this sewing machine, turn the power switch ON after
setting the sewing machine to the bed base properly.
II. SPECIFICATIONS
Main specications of the LBH-1796AN computer-controlled, lockstitch buttonholing machine.
Subclass S
Major application
Buttonholing size
Buttonholing of cloth such as men’s shirts, blouses,
work uniforms, ladies' wear, etc.
Standard : Max. 4 mm
Knife size used :
6.4 to 25.4 mm (1/4' to 1')
Buttonholing sewing length
Max. 220 mm
– 1 –
1. Specications
Sewing speed Standard speed : 3,600 sti/min (Max. : 4,200 sti/min)
(Max. : 3,300 sti/min when dry hook is used)
Needle DP×5 #11J to #14J
Hook DP type full-rotary hook
Needle rocking drive method Drive by stepping motor
Feed drive method Drive by stepping motor
Presser lifting drive method Drive by stepping motor
Lift of presser foot 14 mm (Optional setting available) Max. : 6 mm (In the case of
parallel lifting of the presser foot)
Cloth cutting knife drive method Motor-driven crank system
Standard sewing shape 31 kinds
Number of patterns stored in memory 99 patterns
Mass Machine head 55 kg, Control box 5.5 kg
*1
Power consumption 370 VA
Operating temperature range 5 ˚C to 35 ˚C
Operating humidity range 35% to 85% (No dew condensation)
Line voltage Rated voltage ± 10 % 50/60 Hz
Noise - Equivalent continuous emission sound pressure level (LpA) at
the workstation :
A-weighted value of 81.0 dB ; (Includes ; KpA = 2.5 dB) ; ac-
cording to ISO 10821- C.6.3 -ISO 11204 GR2 at 3,600 sti/min.
*1: In the case of parallel lifting of the work clamp foot, the amount of lift is limited to 4.8 mm at the maximum when
the position of the work clamp foot is in the range of 182.1 to 220.0 mm.
– 2 –
2. Standard sewing shape list
(1) Square type (2) Round type
PANEL
DISPLAY
(8) Eyelet radial
type
PANEL
DISPLAY
(15) Semilunar
taper bar-tacking
type
(9) Eyelet straight
bar-tacking type
(16) Eyelet semi-
PANEL
DISPLAY
PANEL
DISPLAY
lunar type
(3) Radial square
type
PANEL
DISPLAY
(10) Eyelet taper
bar-tacking type
PANEL
DISPLAY
(17) Eyelet round
type
(4) Radial type
PANEL
DISPLAY
(11) Semilunar
type
PANEL
DISPLAY
(18) Square radi-
al type
(5) Radial straight
bar-tacking type
PANEL
DISPLAY
(12) Round
square type
PANEL
DISPLAY
(19) Square
semilunar type
(6) Radial taper
bar-tacking type
PANEL
DISPLAY
(13) Semilunar
square type
PANEL
DISPLAY
(20) Square
round type
(7) Eyelet square
type
PANEL
DISPLAY
(14) Semilunar
straight bar-tack-
ing type
PANEL
DISPLAY
(21) Square
straight bar-tack-
ing type
PANEL
DISPLAY
(22) Square taper
bar-tacking type
PANEL
DISPLAY
(29) Bar-tacking,
left cut
PANEL
DISPLAY
PANEL
DISPLAY
(23) Radial semi-
lunar type
PANEL
DISPLAY
(30) Bar-tacking,
center cut
PANEL
DISPLAY
PANEL
DISPLAY
(24) Radial round
type
PANEL
DISPLAY
(31) Basting + Cloth
cutting knife
PANEL
DISPLAY
PANEL
DISPLAY
(25) Semilunar
radial type
PANEL
DISPLAY
PANEL
DISPLAY
(26) Semilunar
round type
PANEL
DISPLAY
PANEL
DISPLAY
(27) Bar-tacking
PANEL
DISPLAY
PANEL
DISPLAY
(28) Bar-tacking,
right cut
PANEL
DISPLAY
– 3 –
3. Conguration
❻
❷
❸
❹
❺
LBH-1796AN consists of the following components.
Power switch
❶
Machine head (LBH-1796AN)
❷
Operation panel
❸
Control box (MC-602)
❹
Presser lifting and starting pedal
❺
Thread stand device
❻
Power switch (EU type)
❼
❶
❼
– 4 –
III. INSTALLATION
WARNING :
To prevent possible accidents caused by the fall of the sewing machine, perform the work by two
persons or more when the machine is moved.
(1) Preparation for assembly of the control box
❶
1) Fix toothed washers ❷ and rubber cushions ❸ on control box ❶. (At four locations)
* Tighten the toothed washers so that their
height becomes 0.8 mm.
2) Fix control box mounting plate ❹ with plain
washers ❺ and nuts ❼. (At four locations)
* Fix the mounting plate while tting the
screw in the U-groove in the mounting
plate.
0.8 mm
❸
❷
❼
❺
❹
At four locations
– 5 –
(2) Set-up of the table
❷
❺
❻
❼
❾
❽
❶
❹
1) Fix control box ❶, power switch ❸ and pedal sensor ❹ on table ❷.
2) Fix power switch ❸ with a staple.
3) Pass four bed base xed screws ❺ through bed base ❻.
4) Set rubber cushions ❼ to holes ❽ (4 places) for xing bed base and x bed base ❻.
5) Fix head support bar ❾ on table ❷.
6) Place the main unit of the sewing machine on bed base ❻. Then, connect the pedal and pedal
sensor ❹ with connecting rod supplied with the unit.
❸
– 6 –
(3) Connecting the power source cord
• Connecting the power cable
Voltage specications are shown on the power indication tag attached on the power cable and on the
rating plate adhered on the power box. Connect the cable which matches the specications.
Power indication tag
Rating plate
(For example: In the
case of 200V)
Never use under the wrong voltage and phase.
• Connecting single phase 220V, 230V and 240V
Table
Control box
Green/Yellow
Light blue
Brown
Light blue
Brown
Green/Yellow
Plug
Power switch
• Connecting three phase 200V, 220V, 230V and 240V
White
Green/Yellow
Plug
Red
Power switch
Table
Control box
Green/Yellow
White Black
Red
Black
Power source cord
Power source cord
Light
blue
Brown
Green/
Yellow
White
Black
Red
Green/
Yellow
AC
220 V
-240 V
GND
AC
200 V
-240 V
GND
– 7 –
(4) Installing the sewing machine main unit
WARNING :
To prevent possible accidents caused by
the fall of the sewing machine, perform the
work by two persons or more when the
machine is moved.
-1
❷
(rubber)
❸
❶
-2
❷
(metal)
Place hinge plates ❶ and shaft bearings
-1 (rubber) and ❷-2 (metal) in two places
on the head base and x the hinge plates to
the machine head with setscrews ❸ in two
places.
When the rubber hinge and
metal tting hinge are installed
in reverse order, it is dangerous since the sewing machine
shakes when it is tilted. So, be
careful.
❷
– 8 –
(5)
Preparation for installation of the feed plate, sub tables and positioning gauge
The parts listed below should be prepared in order to install the feed plate, sub tables and positioning
gauge on the machine head.
Feed plate
Two setscrews
・
Sub table B
Two setscrews
・
Sub table A
(To be used for fastening the sub
table A to the machine head)
Two setscrews
・
(To be used for fastening
the sub table A to the
sub table B)
Two setscrews
・
(To be used for fastening the sub
table A to the table)
Two setscrews
・
Four washers
・
Two pieces of rubber
・
Four nuts
・
Positioning gauge
Four setscrews
・
Four washers
・
– 9 –
(6) Installing the feed plate
❶
1) Holding section ❶, lift up the presser foot and
place feed plate ❷, which is supplied with the
unit, in position.
Wipe the grease (for rust prevention)
off the top surface of the bed. Then,
attach the feed plate.
❹
0.1 mm
❷
❷
0.1 mm
❸
❷
2) Temporarily put two accessory setscrews ❸
into the corresponding tapped holes.
3) Adjust so that an equal lateral clearances (0.1
mm) is provided respectively between right and
left throat plate bases ❹ and feed plate ❷.
4) Tighten setscrews ❸.
5) Lower the presser foot. Then, move feed plate
back and forth to conrm that the feed plate
❹
❷
can be moved smoothly. (with a force of 30 N
or less).
If feed plate ❷ comes in contact with throat
plate base cover ❹ when moving the former
back and forth, loosen setscrews ❸ and re-position feed plate ❷ appropriately.
1.
Be careful not to place your hand under the presser foot when lowering it.
2. Be aware that the feed mechanism
can lose synchronism if the feed
plate cannot be moved smoothly
due to a hitch or an irregular torque.
3. If the feed plate is moved forward
again when the scissors has projected to reach to thread trimming
position, the feed plate can overpass the closing cam to cause the
sewing machine to lock.
– 10 –
(7) Installing the sub tables
❷
❸
❶
Lightly press
against the
feed plate
1) Move feed plate ❶ forward. Lightly press sub
table B ❷, supplied with the unit. Then, temporarily tighten setscrews ❸.
If the sub table B does not support
the feed plate when the latter moves
forward, the presser foot fails to hold
the material securely, causing stitch
skipping and thread breakage.
On the other hand, if the sub table B
is excessively pressed against the
feed plate, the feed mechanism can
lose synchronism due to an excessive load when it is moved forward.
2) Fit sub table A ❹, supplied with the unit, to the
bed and sub table B ❷.
❺
❹
3) Temporarily fix sub table A ❹, supplied with
the unit, on the machine head with two setscrews ❺.
4) Join sub table A ❹ to sub table B ❷ with two
setscrews ❻ and two washers ❼.
❼
❷
❻
❹
5) Firmly tighten all the setscrews which have
been temporarily tightened.
– 11 –
❾
❼
❽
❼
6) Move the feed plate back and forth to check
that it can be moved smoothly without being
hitched along the sub tables.
If the feed plate and the sub tables are
joined in the state where they interfere with each other, an extra load can
be produced. In this case, the feed
mechanism can lose synchronism.
7) Mount the base of the sub table A on the table
with two sets of setscrew ❾ and nut with
washer ❼ and a piece of rubber ❽ placed between them.
8) Fix the support metal plate which supports
the sub table A with two setscrews $11$ while
pressing it in the direction of the arrow so that it
project the table by 0.1 to 1 mm.
If the sub table A is not closely tted
to the table and not applied with an
adequate pressure, the sub table A
can vibrate heavily at a sewing speed
around 2,000 sti/min to make a noise.
Longitudinal direction
Vertical direction
9) In the case the longitudinal mounting direction of the sub table A is not correct, loosen six setscrews
and re-position the sub table A. Then, x it in the correct position.
In the case the vertical mounting direction of sub table A is not correct, loosen six setscrews and
re-position sub table A. Then, x it in the correct position.
If the sub table A is tted excessively near the bed, it can come in contact with the feed
plate causing the feed mechanism to lose synchronism.
– 12 –
(8) Temporarily installing the positioning gauge
1) Move feed plate ❶ forward.
2) Temporarily fix positioning gauge ❹ on the
❶
❹
❷❸
feed plate with setscrews ❷ and washers ❸
(four pieces each).
(9) Adjusting the positioning gauge
❷
❶
❹
1) Loosen setscrews ❷ (at four locations) of positioning gauge ❶.
2) Fit a ruler respectively at the front side and the far side of positioning gauge ❶ to determine its
position.
3) Once the position of the positioning gauge is determined, tighten three setscrews ❷.
4) Loosen setscrews ❸ of buttonhole interval gauge ❹.
5) Move buttonhole interval gauge ❹ to obtain a desired buttonhole interval.
6) Once the position of the buttonhole interval gauge is determined, tighten setscrews ❸.
(If the positioning gauge is not necessary, it should be removed.)
Adjustable range of the positioning gauge (a distance from the center of the knife slot)
13 mm - 23 mm
1. If setscrew ❷ is tightened with a tightening torque of 2.0 N•m or more, the screw
threads can be damaged. Be careful not to tighten the setscrews excessively.
2. In the case the adjustment range of the positioning gauge is adjusted to less than
13 mm, the gauge can tilt.
❸
Rulers or the like
– 13 –
(10) Tilting the sewing machine head
WARNING :
When tilting/raising the sewing machine head, perform the work so as not to allow your ngers
to be caught in the machine. In addition, to avoid possible accidents caused by abrupt start of
the machine, turn OFF the power to the machine before starting the work.
❶
A
1) Turn the thread stand unit to a position where
it is not an obstacle to the conduct of the following procedure.
2) Whenever you tilt the machine head, go
around behind the sewing machine and check
to make sure that the top cover and the motor cover are securely fixed. Then, holding
A
sections of the machine head with both
hands, carefully tilt the machine head until the
machine head comes in contact with machine
head supporting rod ❶.
– 14 –
1. Make sure that sewing machine
head support bar ❶ is placed on
the table before tilting the sewing
machine.
2. To protect fall-down, be sure to
tilt the sewing machine in a level
place.
3. Never tilt the machine head while
holding it by the sub table.
(11) Connecting the machine head tilt detector
1) Connect machine head tilt detector ❶ with
connector ❷ located on the machine head
side.
2) Adjust detecting plate ❹ so that a clearance
of 1.2 to 2.5 mm is provided between tilt detection sensor ❸ and detecting plate ❹.
Press READY key to conrm that no
error occurs.
In addition, open and close hook cover ❺ to
conrm that detecting plate ❹ does not interfere with bed base ❻.
❺
❸
❷
❶
❹
❻
❹
1.2 to 2.5 mm
If detecting plate ❹ is not properly
adjusted, E302 (machine head tilt error or hook cover open error) can occur to disable the normal operation
of the sewing machine.
❸
❻
(12) Installing the hook oil shield plate
❶
❸
❷
Install hook oil shield plate ❶ onto bed base ❸
with setscrew ❷.
Attach hook oil shield plate ❶ to the
bed base with the sewing machine
raised.
In addition, check to be sure that the
sewing machine does not interfere
with hook oil shield plate ❶ when
tilting/raising the former.
Adjust the mounting of the hook oil
shield plate ❶ to prevent scattered
from the gap between the bed and
cover pot.
– 15 –
(13) Installing the operation panel
(Standard installation)
Fix operation panel asm. ❶ on the table with four wood
❶
❷
Resin panel base
(Installation using the accessory plate)
If the operation panel comes in contact with the sewing material, the accessory plate should be used to
prevent the contact.
screws ❷. Pass the cable through hole ❸ in the table.
❸
❸
❹
❸
❻
❼
❺
1) Remove four tapping screw ❹ from the resin panel base to detach the operation panel.
2) Install panel mounting plate ❺, supplied with the unit, with four accessory setscrews ❻ instead of
the tapping screws.
If panel mounting plate ❺ is installed with tapping screws ❹ which are removed from
the resin panel base, the panel PCB can be damaged.
3) Fix panel mounting plate ❺ on the table with two wood screws ❼. Pass the cable through hole ❸
in the table.
– 16 –
(14) Connecting the cords
❷
❶
❹
1) Loosen four setscrews ❷ of control box cover ❶. Remove control box cover ❶.
2) Connect the cord to the connector on the
MAIN PCB as illustrated in the gure below.
3) Fix the earth cord with setscrew ❸.
4) Install control box cover ❶.
5) Fix control box cover with the washers,
spring washers and nuts ❹.
Earth cord
CN15
CN17
CN32
CN40
CN49
CN39
CN34
Sewing machine head
Operation panel
Electric bobbin winding device (optional)
MAIN circuit board
CN40
MAIN-INT C
CN32
MAIN-INT B
CN34
Panel
CN44
CN39
Pedal
CN49
MAIN-INT A
CN15
Main motor encoder
CN17
Main motor cord
– 17 –
❸
Earth cord
(15) Managing the cord
❶
❸
1) Slowly tilting the sewing machine, check
that the cords are not forcibly pulled.
When you tilt the sewing machine, make sure that the sewing
machine head support bar ❶ is
placed on the table.
2) Bring the cords under the table into the
control box.
3) Put the cord brought into the control box
through cord exit plate ❷ and fix cable
clip band ❸.
❹
❺
❷
4) Install control box lid ❹ with four setscrews ❺.
– 18 –
(16) Installing the eye protection cover
WARNING :
Be sure to attach this cover to protect the eyes from the disperse of needle breakage.
❶
Operator
Be sure to install and use eye protection cover ❶
and use the sewing machine.
(17) Fixing the temporary stop switch
The temporary stop switch has been factory-set in state A at the time of shipment. Loosen setscrews
and x mounting plate ❸ with setscrews ❶. Then, x the switch on mounting plate ❸ with acces-
❶
sory setscrews ❷.
❶
❶
➡
❸
❷
A
– 19 –
(18) Thread guide rod
Thread guide rod
(19) Installing the thread stand
Securely t the thread guide rod so that two side
holes in the thread guide rod face the thread
guide.
1) Assemble the thread stand, and set it in the
hole in the top right corner of the machine
table.
2) Tighten locknut ❶ to x the thread stand.
❶
– 20 –
IV. PREPARATION BEFORE OPERATION
1. Lubrication
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.
Front side
❶
Front
side
1) Lubricating oil to oiling tank
○ Fill the oiling tank with JUKI New Defrix Oil No.1 up to the level indicated by “MAX” ❶. When supply-
ing oil to the oil tank through the lubricating hole, take care not to allow dust to enter the oil tank.
○ Supply oil in the case the oil cannot be visually observed from the front side of the oil tank.
❸
❹
❷
Detailed diagram of oil amount adjusting section
Oil pipe
❷
Increase
Increase
Oil amount
Decrease
Decrease
2) Adjusting the lubrication for the sewing hook
○ The amount of oil is adjusted with oil amount adjusting screw ❷.
○ Amount of supplied oil is reduced when turning the screws ❷ clockwise.
○ When you rst operate your sewing machine after set-up or after an extended period of disuse, re-
move the bobbin case and apply a few drops of oil to the hook race. In addition, apply a few drops oil
from oiling hole ❹ in hook driving shaft front metal ❸ to soak the inside felt in oil.
– 21 –
100 mm
40 mm
2 to 5 mm
* The adequate oil quantity is achieved when the oil spots are made on paper within a
range of 2 to 5 mm in width (oil spots should not be in the form of lines).
3) How to check the hook oil quantity
1. In preparation for checking the hook oil quantity, cut a sheet of paper to make a piece of paper size of
which is approximately 40 mm × 100 mm.
2. After the adjustment of the oil quantity, start the sewing machine at a high speed (3,600 sti/min) by
100 times or more.
3. Insert the piece of paper prepared in Step 1 into the clearance provided between the hook cover and
the bed base so that it is placed near the underside of the hook.
As a guide, insert the paper until it comes in contact with the hook oil shield.
4. Supporting the paper with hand, run the sewing machine by ve cycles using the standard pattern (3,600
sti/min) and check the splashing oil quantity.
In the case the oil quantity is too much even after the oil controlling screw is fully tight-
ened, remove the hook shaft coupling and cut off the excess of oil wick.
Oil wick
Approximately 0.5 mm
Hook shaft coupling
Approximately 0.5 mm
2. Inserting the needle
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.
Hold needle with its recessed part facing toward the operator side A,
insert the needle fully into the needle clamping hole, and tighten needle setscrew ❶. Use a DP×5 (#11J, #14J).
❶
When attaching the needle, turn OFF the power to the
motor.
A
– 22 –
3. Threading the needle-thread
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.
❼
❶
Cotton thread, spun thread
Synthetic lament thread
❷
❻
❽
❹
❸
❺
❾
Pass the needle thread in the order ❶ to as shown in the gures.
The threading can be done easily by using the needle threader supplied with the machine.
Change the thread guide threading method according to the thread to be used.
4. Threading the bobbin case
Whip stitchPurl stitch
❶
❷
Bobbin
Bobbin case
❸
❹
Rotating direction of bobbin and threading
1) Fit the bobbin so that it rotates in the direction of the arrow.
2) Pass the thread through thread slit ❶, then through under the tension spring ❷, again through thread
slit ❸, and pull the thread from ❹.
3) Threading at ❹ for purl stitching is different from that for whip stitching. So, be careful.
❹
– 23 –
5. Adjusting the bobbin thread tension
❷
❶
Adjust the bobbin thread tension as given below when the bobbin thread is pulled up at the position where
thread slit ❶ of bobbin case comes up.
To such an extent that bobbin case quietly comes down when holding
Purl stitch
Whip stitch
Turning tension adjust screw ❷ clockwise will increase bobbin thread tension, and turning it counterclockwise will decrease the tension.
Adjust the bobbin thread tension to lower for synthetic lament thread, and to higher for spun thread. The
thread tension is higher by approximately 0.05N when the bobbin case is set to the hook since idle-prevention spring is provided.
0.05 to 0.15N
0.15 to 0.3N
thread end coming from bobbin case and shaking it quietly up and
down.
To such an extent that bobbin case barely comes down when holding thread end coming from bobbin case and shaking it somewhat
strongly.
When bobbin thread tension is adjusted, check the needle thread tension setting of the
memory switch. (Refer to "V-22. Memory switch data list" p.64.)
6. Installation of bobbin case
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) Lift up and hold bobbin case latch lever between
two ngers.
2) Push the bobbin case into the hook so that it is
supported by the hook shaft ❶ and then snap in
the latch lever.
Press the bobbin case until the predetermined
position is reached, and it will click.
❶
1. If the bobbin case is out of the pre-
determined position, it can jump out
from the hook to cause the needle
thread to tangle on the hook shaft.
Check to be sure that the bobbin
case is properly installed in the correct position.
2. There is a difference in the shape of
bobbin case between the standard
hook and the dry one. They have
nothing in common with each other.
– 24 –
7. Installing the knife
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.
❷
1 to 2 mm
❶
Inch → mm CONVERSION TABLE
Knife size Indication of mm
1/4 6.40
3/8 9.50
7/16 11.10
1/2 12.70
9/16 14.30
5/8 15.90
11/16 17.50
3/4 19.10
13/16 20.60
7/8 22.20
1 25.40
When replacing the knife with a new one, perform as
follows.
1) Knife ❶ can be easily removed together with the
washer when removing knife retaining screw ❷.
2) Lower the knife bar by hand. Now, push the knife
bar down so that the knife goes below the top
surface of the throat plate by 1 to 2 mm, as illustrated in the gure. In this state, place the washer and tighten the setscrew.
When the cloth cutting knife you have is indicated in
inch, set the cloth cutting length (knife size) in mm
using the inch → mm conversion table. (Refer to
12. Sewing data list" p.43
.)
"V-
8. Item to be checked before turning the power ON
If the work clamp foot is the lifted state
before turning the power ON, lower it
rstly and turn ON the power to the
sewing machine.
When lowering the work clamp, take
care not to place your hands near the
knife.
If the power is turned ON with the work
clamp raised and the READY key is
pressed, "E998 Work clamp deviation
error" can occur.
– 25 –
V. OPERATION OF THE SEWING MACHINE
1. Explanation of the operation panel switch
❶
❽
❻
❼
❾
❷ ❺❹❸
– 26 –
No. NAME FUNCTION
LCD display Various data such as pattern No.,
❶
READY key Press this key when starting sew-
❷
RESET key Press this key when releasing
❸
MODE key This key is used for displaying the
❹
PRESSER and
❺
WINDER key
ITEM SELECT
❻
key
DATA
❼
CHANGE key
EDIT key This key is used to display the
❽
RETURN key This key is used to return the
❾
shape, etc. are displayed.
ing.
Every time this key is pressed,
change-over of sewing ready set
state and data set state can be
performed.
error, travelling the feed mechanism to its initial position, counter
resetting, etc.
mode screen.
This key lifts or lowers the presser. When the presser goes up,
the needle bar travels to the origin and when it comes down, the
needle bar travels to the right.
This key is pressed when performing bobbin winding.
This key is used to select the data
No. and other kinds of data.
This key is used to change the
pattern No. and other kinds of
data.
This key is used to move the feed
forward on a stitch-by-stitch basis.
edit screen, to select the item or
to display the detail screen.
screen to the previous one.
No. NAME FUNCTION
CLOTH CUT
LENGTH key
KNIFE
GROOVE
WIDTH key
CLEARANCE
key
THREAD TEN-
SION key
PARAMETER
REGISTRATION key
COUNTER
key
This key selects cloth cut length
display.
This key is used to select the
knife-groove width correction display.
Every time this key is pressed,
S003 (right) and S004 (left) are
displayed alternately.
This key selects clearance display.
Every time this key is pressed,
S022 (first clearance) and S023
(second clearance) are displayed
alternately.
This key is used to select the
thread tension display.
Every time this key is pressed,
the display item is changed over
as described below:
S052 Thread tension at the right
parallel section
S053 Thread tension at the left
parallel section (first cycle
of double stitching)
S054 Thread tension at the right
parallel section (first cycle
of double stitching)
S055 Thread tension at the first
bartacking section
S056 Thread tension at the sec-
ond bartacking section
This is a short cut key that parameter registration is available.
Registration of shortcut to setting
display of an optional pattern,
sewing parameter or adjustment
data is possible. For the setting
procedure, Refer to
parameter register key" p.52
This key selects counter display.
"V-15. Using
.
SEWING
SPEED key
OVEREDGING WIDTH
key
PITCH key
This key is used to display the parameter edit items related to the
sewing speed.
This key selects overedging width
display.
Every time this key is pressed,
S005 and S006 are displayed alternately.
This key selects pitch of parallel
section.
Every time this key is pressed,
S007 and S021 are displayed alternately.
– 27 –
COPY key Press this key when copying pat-
SET READY
LED
NFC mark Bring the tablet or smartphone
tern.
It lights up under the sewing
mode.
close to the NFC mark when
carrying out communication.
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