Juki LZ-2290A Service Manual
R
Computer-controlled, Direct-drive,
High-speed, 1-needle, Lockstitch,
Zigzag Stitching Machine
LZ-2290A / IP-100 / SC-915
INSTRUCTION MANUAL
NOTE : Read safety instructions carefully and understand them before using.
Retain this Instruction Manual for future reference.
E-No.03
40012702
R
INTERNATIONAL SALES H.Q.
8-2-1, KOKURYO-CHO,
CHOFU-SHI, TOKYO 182-8655, JAPAN
PHONE : (81)3-3430-4001 to 4005
FAX : (81)3-3430-4909 • 4914 • 4984
TELEX : J22967
Copyright C
All rights reserved throughout the world.
2003-2004 JUKI CORPORATION.
Please do not hesitate to contact our distributors or agents in your area for further information when necessary.
＊ The description covered in this instruction manual is subject to change for improvement of the
commodity without notice.
04 · 04 Printed in Japan (E)
IMPORTANT SAFETY INSTRUCTIONS
Putting sewing systems into operation is prohibited until it has been ascertained that the sewing systems in
which these sewing machines will be built into, have conformed with the safety regulations in your country.
Technical service for those sewing systems is also prohibited.
1. Observe the basic safety measures, including, but not limited to the following ones, whenever you use the
machine.
2. Read all the instructions, including, but not limited to this Instruction Manual before you use the machine.
In addition, keep this Instruction Manual so that you may read it at anytime when necessary.
3. Use the machine after it has been ascertained that it conforms with safety rules/standards valid in your
country.
4. All safety devices must be in position when the machine is ready for work or in operation.
The operation without the specified safety devices is not allowed.
5. This machine shall be operated by appropriately-trained operators.
6. For your personal protection, we recommend that you wear safety glasses.
7. For the following, turn off the power switch or disconnect the power plug of the machine from the
receptacle.
7-1 For threading needle(s), looper, spreader etc. and replacing bobbin.
7-2 For replacing part(s) of needle, presser foot, throat plate, looper, spreader, feed dog, needle guard, folder,
cloth guide etc.
7-3 For repair work.
7-4 When leaving the working place or when the working place is unattended.
7-5 When using clutch motors without applying brake, it has to be waited until the motor stopped totally.
8. If you should allow oil, grease, etc. used with the machine and devices to come in contact with your eyes or
skin or swallow any of such liquid by mistake, immediately wash the contacted areas and consult a medical
doctor.
9. Tampering with the live parts and devices, regardless of whether the machine is powered, is prohibited.
10. Repair, remodeling and adjustment works must only be done by appropriately trained technicians or
specially skilled personnel. Only spare parts designated by JUKI can be used for repairs.
11. General maintenance and inspection works have to be done by appropriately trained personnel.
12. Repair and maintenance works of electrical components shall be conducted by qualified electric
technicians or under the audit and guidance of specially skilled personnel.
Whenever you find a failure of any of electrical components, immediately stop the machine.
13. Before making repair and maintenance works on the machine equipped with pneumatic parts such as an air
cylinder, the air compressor has to be detached from the machine and the compressed air supply has to be
cut off. Existing residual air pressure after disconnecting the air compressor from the machine has to be
expelled. Exceptions to this are only adjustments and performance checks done by appropriately trained
technicians or specially skilled personnel.
14. Periodically clean the machine throughout the period of use.
15. Grounding the machine is always necessary for the normal operation of the machine. The machine has to
be operated in an environment that is free from strong noise sources such as high-frequency welder.
16. An appropriate power plug has to be attached to the machine by electric technicians. Power plug has to be
connected to a grounded receptacle.
17. The machine is only allowed to be used for the purpose intended. Other used are not allowed.
18. Remodel or modify the machine in accordance with the safety rules/standards while taking all the effective
safety measures. JUKI assumes no responsibility for damage caused by remodeling or modification of the
machine.
19. Warning hints are marked with the two shown symbols.
Danger of injury to operator or service staff
Items requiring special attention
i
FOR SAFE OPERATION
1. To avoid electrical shock hazards, neither open the cover of the electrical box nor
touch the components mounted inside the electrical box.
1. To avoid personal injury, never operate the machine with any of the finger guard or
safety devices removed.
2. To prevent possible personal injuries caused by being caught in the machine, keep
your fingers, head and clothes away from the handwheel while the machine is in
operation. In addition, place nothing around it.
3. To avoid personal injury, never put your hand under the needle when you turn “ON”
the power switch or operate the machine.
4. To avoid personal injury, never put your fingers into the thread take-up cover while the
machine is in operation.
5. The hook rotates at a high speed while the machine is in operation. To prevent possible
injury to hands, be sure to keep your hands away from the vicinity of the hook during
operation. In addition, be sure to turn OFF the power to the machine when replacing
the bobbin.
6. To avoid possible personal injuries, be careful not to allow your fingers in the machine
when tilting/raising the machine head.
7. To avoid possible accidents because of abrupt start of the machine, turn OFF the
power to the machine when tilting the machine head or performing replacement of
parts, adjustment of the machine, etc.
8. The motor does not produce noise while the machine is at rest. To avoid possible
accidents due to abrupt start of the machine, be sure to turn OFF the power to the
machine.
9. To avoid electrical shock hazards, never operate the sewing machine with the ground
wire for the power supply removed.
10. To prevent possible accidents because of electric shock or damaged electrical
component(s), turn OFF the power switch in prior to the connection/disconnection of
the power plug.
11. To prevent fires, periodically draw out the power plug from the plug socket and clean
the root of the pins and the space between pins.
12. Do not turn OFF the power switch while the machine is in operation.
13. Hold the upper side of the machine head with both hands and perform the work quietly
so as not to allow your fingers or the like to be caught in the machine when tilting the
machine head or returning it to the home position.
14. Be careful that any load is not applied to the operation panel section.
ii
CAUTION BEFORE OPERATION
WARNING :
To avoid malfunction and damage of the machine, confirm the following.
• Remove the air-vent cap (red color) attached to the sewing machine bed.
• Be sure to fill the oil tank with oil before use.
• Remove the needle bar stopper.
• Clean the sewing machine thoroughly before using it for the first time.
• Remove all dust collected on the sewing machine during the transportation.
• Confirm that the voltage and phase are correct.
• Confirm that the power plug is properly connected.
• Never use the sewing machine in the state where the voltage type is different from the designated one.
• The direction of rotation of the sewing machine is counterclockwise as observed from the handwheel side.
Be careful not to rotate it in reverse direction.
• Do not tilt the machine head toward this side since oil leakage or parts breakage occurs.
•A safety switch is installed so that the sewing machine cannot be operated with the machine head tilted.
When operating the sewing machine, turn ON the power switch after properly setting the head on the table.
• Before starting a test run, remove the bobbin case and the needle thread from the machine.
• For the first month after set-up, use the machine at a reduced sewing speed of 3,000 rpm or less.
• Operate the handwheel after the sewing machine has totally stopped.
iii
CONTENTS
1. NAME OF EACH COMPONENT ............. 1
2. SPECIFICATIONS ................................... 2
2-1. Specifications of the machine head .......... 2
2-2. Specifications of the electrical box ........... 2
3. STITCH PATTERN TABLE ..................... 3
4. INSTALLATION ....................................... 4
4-1.
Installation of the sewing machine head ........
4-2. Removing the needle bar stopper ............. 5
4-3. Attaching the knee-lifter ............................. 5
4-4. Adjusting the height of the knee lifter ....... 5
4-5. Installing the electrical box ........................ 6
4-6. Connecting the power switch cord ............ 6
4-7. Installing the
operation panel (IP-100) ...... 7
4-8. Connecting the cords ................................. 7
(1) Preparation of wiring ........................................ 7
(2) Connecting the connectors .............................. 8
4-9. Attaching the connecting rod................... 11
4-10. Adjustment of the pedal ......................... 11
4-11. Installing the thread stand ...................... 12
4-12.
Installing the bird’s nest prevention (CB)
type sewing machine ..................................
4-13. Lubrication
(LZ-2290A-SS • A-SU (-7)) ......
12
13
4-14. Test run .................................................... 14
(1) Turn ON the power .........................................14
(2) How to operate the pedal ................................14
5. PREPARATION BEFORE SEWING ..... 15
5-1. Inserting the needle .................................. 15
5-2. Removing the bobbin case ....................... 15
5-3. Winding the bobbin thread ....................... 15
5-4.
Placing the bobbin case and the bobbin .....
5-5. Threading the machine head .................... 17
5-6. Adjusting the stitch length ....................... 17
5-7.
Adjusting the condensation stitching ........
6.
HOW TO USE THE OPERATION PANEL ...
6-1.
Names and functions of the respective sections ....
6-2. Before setting the pattern ......................... 20
(1) Limitation of the max. zigzag width .................20
(2) Setting the reference of stitch base line ..........22
6-3. Basic screen .............................................. 23
6-4.
List of the display pictographs of each screen...
6-5. Setting the sewing pattern ....................... 35
(1) Selecting the zigzag pattern ............................ 35
6-6. Setting of the sewing shape ..................... 37
(1) Standard zigzag, 2-step zigzag and
3-step zigzag stitch ......................................... 37
(2) Scallop stitching ..............................................38
(3) Blind stitch sewing ..........................................40
(4) Custom pattern stitching ................................. 41
6-7. Reverse feed stitching .............................. 42
(1) Standard condensation .................................. 43
(2) 2-point condensation ...................................... 44
(3) Condensation custom ..................................... 45
(4)
Comparision table of the reverse stitch of each shape ....
6-8. Selection of the kind of stitching ............. 48
(1) Overlapped stitching ...................................... 48
(2) Programmed stitching .....................................48
6-9. Custom pattern .......................................... 50
(1) Custom pattern setting ....................................50
(2) New creation of the custom pattern ................ 51
(3) Custom pattern edit ......................................... 52
(4)
Registration, copy and deletion of the custom pattern ...
6-10. Condensation Custom ............................ 53
(1) Condensation custom setting ......................... 54
(2) Condensation custom edit ..............................55
6-11. Pattern stitching ...................................... 56
(1) Setting the pattern stitching ............................56
(2) Registering the pattern stitching .....................57
(3) Copy and deletion of the pattern stitching ....... 58
6-12. Continuous stitching .............................. 59
(1) New creation of the continuous stitching ........60
(2) Continuous stitching edit .................................60
(3)
Copy and deletion of the continuous stitching ...
16
17
18
18
24
47
52
62
6-13. Cycle stitching ......................................... 63
(1) New creation of the cycle stitching ................. 63
(2) Cycle stitching edit ..........................................63
(3) Copy and deletion of the cycle stitching .......... 65
(4) Teaching ........................................................ 66
(5) Performing the programmed stitching using
the cycle stitching ...........................................67
6-14. Counter ..................................................... 67
4
(1) Thread trimming counter .................................67
(2) Bobbin thread counter ..................................... 67
6-15. Information ............................................... 68
(1) Sewing common data .....................................69
•
Limiting procedure of max. zigzag width limitation ...
• Max.zigzag width limitation value ......................... 69
• Reference of stitch base line ................................ 69
• Mirror function setting ........................................... 69
•
Position of the stitch base line of condensation custom . 70
• Counter function ................................................... 70
• Key lock ................................................................ 70
• Selection of max. zigzag width limitation display
when the power is turned ON .............................. 70
(2) Sewing management information ...................71
(3) Communication mode .....................................74
6-16. Setting for functions ............................... 78
(1)
How to change over to the function setting mode ..
(2) Function setting list ......................................... 81
(3)
Detailed explanation of selection of functions ....
6-17. External interface .................................... 91
(1) Smart media slot .............................................91
(2) RS-232C port ..................................................91
(3)
General input port (Production control switch
connecting connector) .....................................91
7. SEWING................................................. 92
7-1. Adjusting the thread tension .................... 92
Adjusting the pressure of the presser foot ........
7-2.
One-touch type reverse feed stitching mechanism ...
7-3.
Hand switch ............................................ 95
7-4.
8. STANDARD ADJUSTMENT ................. 96
8-1.
Adjusting the amount of oil in the hook
(LZ-2290A-SS • A-SU (-7)) ..............................
Adjusting the amount of lubricating to face
8-2.
plate section (LZ-2290A-SS•A-SU(-7)) ..... 96
Adjusting the height of the presser bar ..........
8-3.
8-4.
Adjusting the micro-lifting mechanism
of the presser foot ........................................
Height and inclination of the feed dog ........
8-5.
8-6. Hook adjusting mode ................................ 99
8-7. Attaching / removing the hook ............... 100
8-8. Adjusting height of the needle bar ........ 101
8-9. Adjusting the needle-to-hook
timing and the needle guard .................. 101
8-10.
Adjusting the stop position of the needle .
8-11. Adjusting the thread trimmer ............... 102
Adjusting the needle thread feeding device
8-12.
(Thread trimmer type only) .........................
8-13. Adjusting the bird’s nest
prevention (CB) type wiper ................... 104
8-14.
Replacing procedure of the bird’s nest
prevention (CB) type presser knife ........
9. MAINTENANCE
(1) Replacing the power fuse ............................ 106
(2) Power voltage changeover procedure
(power voltage setting procedure) ............... 107
(3)
Adjusting the contrast of the operation panel display
(4) Draining
(5)
Cleaning the dust bag
(6) Cleaning the cooling fan .............................. 109
(7) Cleaning the hook section ............................ 109
(8) Cleaning the rear cover of the control box ....109
(9) Cleaning the operation panel screen ........... 109
(10)
Replacing procedure of the hook shaft oil wick ...
...................................
(Bird’s nest prevention (CB) type only)
(Bird’s nest prevention
(CB) type only)
10. AT A TIME LIKE THIS !..................... 111
11. ERROR DISPLAY.............................. 112
11-1.
Error code list (Error display in panel)
12. TROUBLES AND CORRECTIVE
MEASURES ....................................... 116
.......
69
78
85
93
93
96
97
97
98
102
103
105
106
108
108
108
110
113
iv
1. NAME OF EACH COMPONENT
!5
!4
4
3
2
!6
!3
!2
!1
!7
9
1
5
!0
!8
8
6
7
1Needle thread draw-out device 8Knee lifter lever !5Tension controller No. 1
(LZ-2290A(U)-7) (Pre-tension)
2Wiper switch (WB,CB type) 9Power switch !6Thread stand
3Thread take-up cover !0Hand switch !7Oil supply opening
4Finger guard !1Stitch length dial !8Mirror inversion switch
5Thread tension controller (Rotary tension) !2Condensation dial
6Electrical box !3Control panel
7Pedal !4Bobbin winder
1
2. SPECIFICATIONS
2-1. Specifications of the machine head
Model LZ-2290A-SS LZ-2290A-SS-7 LZ-2290A-SU LZ-2290A-SU-7
Application Light-weight materials to medium-weight materials
Max. sewing speed 5,000 rpm (*1) 4,500 rpm (*1)
Max. zigzag width 10 mm (*2)
Max. feed pitch 5 mm (stepless fine adjustment) 2.5 mm (stepless fine adjustment)
Stitch pattern 8 kinds 14 patterns (custom pattern : up to 500 stitches, 20 kinds can be stored.)
Needle SCHMETZ 438, ORGAN DPX5 : #65 to #90
Oil used JUKI New Defrix Oil No. 1
Thread trimmer Without With Without With
Feed method Standard feed Material slippage prevention
Noise Workplace-related noise at sewing speed
Model
Application Light-weight materials to medium-weight materials
Max. sewing speed 4,000 rpm (*1)
Max. zigzag width 10 mm (*2)
Max. feed pitch 5 mm (stepless fine adjustment) 2.5 mm (stepless fine adjustment)
Stitch pattern 8 kinds 14 patterns (custom pattern : up to 500 stitches, 20 kinds can be stored.)
Needle SCHMETZ 438, ORGAN DPX5 : #65 to #90
Thread trimmer Without With Without With
Feed method Standard feed Material slippage prevention
Noise Workplace-related noise at sewing speed
Minute-quantity
（ ）
lubricating type
(Dry-head type)
n=4500 min-1 : LPA ≦ 81.5 dB(A)
Noise measurement according to DIN 45635-48-A-1.
LZ-2290A-DS LZ-2290A-DS-7 LZ-2290A-DU LZ-2290A-DU-7
n=4000 min-1 : LPA ≦ 81 dB(A)
Noise measurement according to DIN 45635-48-A-1.
* 1. The max. sewing speed is limited by the amount of zigzag width per stitch.
Up to 4 mm : 5,000 rpm (LZ-2290A-SU : 4,500 rpm, LZ-2290A-DS • A-DU (-7) : 4,000 rpm),
up to 5 mm : 4,000 rpm, up to 6 mm : 3,500 rpm, up to 8 mm : 3,000 rpm
• Properly set the number of revolution in accordance with the product to be sewn and process.
* 2. Max. zigzag width is limited to 8 mm at the time of standard delivery.
2-2. Specifications of the electrical box
■ For general export
Supply voltage Single phase 200V / 220V / 240V 3-phase 200V / 220V / 240V
Frequency 50 Hz / 60 Hz
Rated currency 4.6A / 4.3A / 4.0A 3.0A / 2.7A / 2.3A
Operating environment
■ For CE
Supply voltage Single phase 220V / 230V / 240V
Frequency 50 Hz/60 Hz
Rated currency 4.3A / 4.2A / 4.0A
Operating environment
■ For JUS
Supply voltage Single phase 100V / 110V / 120V 3-phase 200V / 220V / 240V
Frequency 50 Hz / 60 Hz
Rated currency 8.0A / 7.5A / 7.0A 3.0A / 2.7A / 2.3A
Operating environment
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
2
3. STITCH PATTERN TABLE
Name of pattern
Straight stitch
Standard zigzag stitch
2-step zigzag stitch
3-step zigzag stitch
Scallop
(right)
Standard
scallop
Crescent
scallop
Stitch
pattern
Number of stitches
for pattern
1
2
4
6
24
Max.zigzag width
—
10
10
10
10
Remarks
Equal-width
scallop
Equal-width
scallop
Scallop
(left)
Blind stitch (right)
Standard
scallop
Crescent
scallop
Equal-width
scallop
Equal-width
scallop
12
24
12
10
a
Blind stitch (left)
Custom pattern
—
2+a
a
500
10
10
3
4. INSTALLATION
WARNING :
• Perform the installation of the sewing machine by the technical personnel who have been trained.
• To prevent personal injury, ask our dealer or the electrician for electric wiring.
• Be sure to perform the work with two persons or more when transporting the sewing machine and use a
lorry when moving it.
• To prevent personal injury caused by abrupt start of the sewing machine, do not connect the power plug
until the set-up of the sewing machine is completed.
• Be sure to earth the ground wire to prevent personal injury caused by leak.
• Be sure to attach safety protection cover, figer guard, etc.
4-1. Installation of the sewing machine head
■ Installing the under cover
1) The under cover should rest on the four corners of
3
3
the machine table groove.
23.5 mm
3
8
7
1
1
A
5
4
1
19.5 mm
B
2) Fix two rubber seats 1 on side A (operator’s side)
using nails 2 as illustrated above. Fix two cushion
seats 3 on side B (hinged side) using a rubberbased adhesive. Then place under cover 4 on the
fixed seats.
32
3) Remove air vent cap 5 attached to the machine
bed. (Be sure to attach cap 5 when transporting
the machine head in the state that the machine head
is removed from the machine table.)
If the sewing machine is operated
Cau tion
without removing air vent cap 5, oil
leakage from gear box portion 7
may occur.
4) Fit hinge 1 into the opening in the machine bed,
and fit the machine head to table rubber hinge 8
before placing the machine head on cushions 3
on the four corners.
4
1
5) Attach head support rod 6 to the machine table.
(However, this step is not necessary for the machine
7
6
with AK device.)
4
4-2. Removing the needle bar stopper
Remove needle bar stopper 1 for transportation.
1
4-3. Attaching the knee-lifter
Insert knee-lifter into attaching hole 2 and tighten it
with bolt 3.
* Adjust the position of knee lifter pad 1 to a
220
Keep the needle bar stopper which has
been removed, and install this needle
bar stopper when transporting the
Cau tion
convenient place. For the reference dimension, the
position is 180 mm from the bottom face of table.
sewing machine.The needle bar
stopper may be cut when it is strongly
drawn out. Slightly move the needle bar
to the right or left and slowly draw out
the needle bar stopper.
2
1
3
4-4. Adjusting the height of the knee lifter
1) The standard height of the presser foot lifted using
the knee lifter is 10 mm.
2) You can adjust the presser foot lift using knee lifter
adjust screw 1.
Cau tion
1
Do not operate the sewing machine
in the state that presser foot 3 is
lifted by 10 mm or more since needle
bar 2 and presser foot 3, or wiper
4 and presser foot 3 come in
contact with each other.
2
4
3
5
4-5. Installing the electrical box
5
6
7
1
Install the electrical box on the underside of the table
at the location illustrated using round-head bolt 1, plain
washer 2, spring washer 3 and nut 4 supplied with
the machine, and using bolt having hexagonal
indentation on the head 5, plain washer 6 and spring
washer 7 supplied with the machine.
2
3
4
4-6.
Connecting the power switch cord (Japan and general export area)
1) Loosen screw 1 located on the side of the power
switch supplied as accessories and remove the
power switch cover.
2) Connecting the input power cord of electrical box
¡
When the input power cord of electrical box is 4P
1
Put 4P cord from hole A of the power switch and
securely fix green/yellow cord to 5, white cord to
2, black cord to 3 and red cord to 4 with screws.
¡
When the input power cord of electrical box is 3P
Put 3P cord from hole A of the power switch and
securely fix green/yellow cord to 5, brown cord to
2 and sky blue cord to 3 with screws.
3)
Connecting the power cable supplied as accessories
2
6
¡In case of 3-phase power cable
Put power cable from hole B of the power switch,
A
9
and securely fix green/yellow cord to 9, white cord
to 6, black cord to 7 and red cord to 8 with screws.
¡In case of single phase power cable
B
Put power cable from hole B of the power switch,
and securely fix green/yellow cord to 9 and other
cords to 6 and 7 with screws. 8 is not used.
5
4
3
8
7
4) Installing the power switch cover
Securely tighten screw 1 located on the side of
the power switch.
4-7. Installing the operation panel (IP-100)
1) Install operation panel 1 on the machine head using
1
screws 3 which have been assembled to panel
installing bracket 2.
2
3
3
3
Cau tion
6
Do not disassemble the operation
panel to prevent it from breakage.
4-8. 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 connect all the
corresponding connectors to the specified 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.
(1) Preparation of wiring
A
1) Pass the cords coming from the machine head to
the underside of the table through hole A in the table.
D
2) Loosen screws D and lift cord presser plate C of
cord passing hole B located on the front cover to
B
C
the top and temporarily tighten the plate.
3) Remove four screws E fixing the rear cover of the
electrical box. When opening the rear cover,
pressing it with your hands, slowly open it by
approximately 90˚ until it stops as illustrated.
Slowly
E
Cau tion
Be sure to lend your hand to the rear
cover in order not to let the rear
cover fall. In addition, do not apply
force to the rear cover opened.
b
a
e
f
c
d
g
How to remove the cord clamp
* See P.11 for how to lock the cord clamp.
4) Remove the locks of cord clamps a, b, c, d, e, and f.
1
1 Lightly pressing
2 Pull down the clamp.
3 The clamp goes up.
3
1
2
7
(2) Connecting the connectors
• Each connector has the inserting direction. Check the direction and securely insert it.
(In case of the type with lock, insert up to the lock.)
Cau tion
• If the connector is forcibly inserted, trouble or accident will be caused.
• Never pull out the connectors inserted at the time of delivery.
• The sewing machine fails to work if the connectors are not properly inserted. Not only
the problem such as the error warning or the like but also breakage of the sewing machine
or electrical box will occur.
B
1
5) Insert yellow/green earth cord 1 coming from the
machine head inside the electrical box through front
cover through hole B, and pass it through cord clamp
Connect cords in the following order.
b
“b” as illustrated and tighten it with screw at the
position 2 in the illustration.
2
6) Insert white square connector 9P black cord 3
coming from the machine head inside the electrical
box through front cover through hole B, and insert
B
it into connector CN38 4 of the circuit board
attached to the front cover.
3
4
5
7
7) Insert white connector 4P black cord 5 coming from
the machine head inside the electrical box through
front cover through hole B, and insert it into
connector CN21 6 of the circuit board attached to
6
the front cover.
8) Insert white connector 26P cord 7 coming from the
control panel inside the electrical box through front
cover through hole B, pass it through cord clamps
“b”, “c” and “d”, insert it into connector CN34 8,
and lock it.
b
d
c
8
8
9) Insert black connector 4P white cord 9 coming from
the machine head inside the electrical box through
front cover through hole B, and insert it into
connector CN31 !0.
9
b
c
!0
10) Insert gray round connector 7P cord !1 coming
from the machine head inside the electrical box
through front cover through hole B, pass it through
!1
cord clamp “a”, and insert it into connector CN30
!2.
a
!2
11) Insert white connector 12P cord !3 coming from
the machine head inside the electrical box through
front cover through hole B, pass it through cord
clamps “b”, “c”, “d” and “g”, and insert it into
connector CN53 !4.
Close cord clamps “b”, “c” and “d”.
!3
g
!4
12) Insert white connector 6P three cords !5 coming
from the machine head inside the electrical box
through front cover through hole B, pass it through
!5
cord clamps “a” and “e”, and insert it into connector
CN54 !6.
e
!6
13) Insert white connector 10P cord !7 and blue
connector 2P cord !8 coming from the machine
head inside the electrical box through front cover
through hole B, pass them through cord clamps
!7
!8
f
e
a
“a”, “e” and “f”, and insert the white 10P into
connector CN51 !9 and the blue 2P into CN46 @0.
@0
!9
Cau tion
The blue 2P connector is attached only
for the machine with thread trimmer.
Close cord clamps “a”, “e” and “f”.
9
@2
@1
f
e
a
When the Auto-lifter (AK121) is used :
14) Insert white connector 2P cord @1 coming from
the machine head inside the electrical box through
front cover through hole B, pass it through cord
clamps “a”, “e” and “f”, and insert it into connector
CN40 @2.
Change the setting of function setting No. 23
from “0” to “1” after completing all set-up
procedure. For the details, see p.78 and p.81.
@6
@3
e
@4
@5
a
b
c
When the bird’s nest prevention device is used
(CB type)
15) Insert white small connector 6P cord @3 coming
from the machine head inside the electrical box
through front cover through hole B, pass it through
cord clamps “a” and “e”, and insert it into connector
CN52 @4.
When foot pedal for standing work (PK70 or 71) is used :
16) Insert black connector 12P cord @5 inside the
electrical box through front cover through hole B
coming from the foot pedal for standing work, pass
it through cord clamps “b” and “c”, and insert it
into connector CN32 @6.
10
@7
@7
@8
#0
@9
17) Connect white connector 2P of cord @7 supplied
as accessories to which red connector 2P and
white connector 2P are attached to white
connector 2P @8 of under cover of the machine
head.
Fix omega lock @9 supplied as accessories with
the neighboring cords and cord @7 as shown in
the figure.
18) Insert red connector 2P side of cord @7 supplied
as accessories to which red connector 2P and
white connector 2P are attached inside the
electrical box through front cover through hole, and
insert it into red connector CN25 #0.
How to lock the cord clamp
When the insertion of the connector is completed, lock
the cord clamps.
4
4Lightly press the corner of clamp.
(Cord clamp is locked with a click.)
2
C
1
B
A
4
3
Clamp
4-9. Attaching the connecting rod
3
q Take care so that the cord is not caught between
the rear cover and the electrical box main body,
close the rear cover while pressing section A on
the lower side of the rear cover, and tighten four
screws 1.
w Press down cord presser plate C of cord through
hole B of the front cover, press the cord, and tighten
screws 2.
1) Fix connecting rod 1 to installing hole B of pedal
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.
2
1
B
A
4-10. Adjustment of the pedal
2
1
3
4
■ Installing the connecting rod
1) Move pedal 3 to the right or left as illustrated by
the arrows so that motor control lever 1 and
connecting rod 2 are straightened.
■ Adjusting the pedal angle
1) The pedal tilt can be freely adjusted by changing
the length of the connecting rod.
2) Loosen adjust screw 4, and adjust the length of
connecting rod 2.
11
4-11. Installing the thread stand
1) Assemble the thread stand unit, and insert it in the
hole in the machine table.
2) Tighten locknut 1 to fix the thread stand.
2
1
4-12. Installing the bird’s nest prevention (CB) type sewing machine
3) For ceiling wiring, pass the power cord through spool
rest rod 2.
(bottom surface of the machine table)
106107
75
291
1
2
34
(mm)
233
3
4
1) Punch dots on the positions of the setscrews of
solenoid valve (asm.) and regulator (asm.) on the
bottom surface of the machine table.
Besides, awling is performed on JUKI genuine table.
2) Fix solenoid valve (asm.) 1 with wood screw 2
supplied with the sewing machine as accessories.
3) Fix regulator (total asm.) 3 with wood screw 4
supplied with the sewing machine as accessories.
4) Connect 6 and 8 hoses attached to regulator (total
asm.) 3 to the respective solenoid valves.
5) Insert dust bag 5 into the top end of hose 4 for
dust bag and fix it with band 6 supplied with the
sewing machine as accessories.
9
9
6
5
5
12
φ
φ
!1
8
!2
7
6) Adjust solenoid valve cord (asm.) 7 to the solenoid
valve and the hot marker of the cord, and connect it.
Connect 6P connector !0!1 to CM52 connector
inside the electrical box.(Refer to “When the bird’s
4
!0
nest prevention device is used, p. 10".)
7) Connect air hose ø4 coming from the machine head
to the solenoid valve section and air hose ø8 to the
dust bag suction port respectively.
8) Fix the solenoid valve and the air hose on the table
with staple 8 supplied as accessories.
1. Fix the staple to such an extent that
the air hose is not crushed.
2. Determine the position of the staple
so that the cord and the air hose
8
!1
!0
Cau tion
do not hang from the table.
9) Connect the air pipe !2 and set the air pressure to
0.6 MPa.
4-13. Lubrication (LZ-2290A-SS • A-SU (-7) )
WARNING :
1. Do not connect the power plug until the lubrication has been completed so as to prevent accidents
due to abrupt start of the sewing machine,
2. To prevent the occurrence of an inflammation or rash, immediately wash the related portions if oil
adheres to your eyes or other parts of your body.
3. If oil is mistakenly swallowed, diarrhea or vomitting may occur. Put oil in a place where children
cannot reach.
Fill the oil tank with oil for hook lubrication before
operating the sewing machine.
1) Remove oil hole cap 1 and fill the oil tank with JUKI
New Defrix Oil No. 1 using the oiler supplied with
the machine.
2) The amount of oil should reach up to the engraved
marker line of oil tank 2.
If the oil is filled excessively, it will leak from the air
vent hole in the oil tank or proper lubrication will be
not performed. So, be careful.
3) When you operate the sewing machine, refill oil if
the top end of oil amount indicating rod 3 comes
down to the lower engraved marker line of oil
amount indicating window 4.
Cau tion
2
3
2
1
Upper engraved
marker line
Lower engraved
marker line
• When you use a new sewing
machine or a sewing machine
after an extended period of
disuse, run your machine at 3,000
to 3,500 rpm for the purpose of
break-in.
• For the oil for hook lubrication,
purchase JUKI New Defrix Oil No.
1 (Part No. : MDFRX1600C0).
13
4-14. Test run
(1) Turn ON the power
WARNING :
• Check again the power voltage before connecting the power cord.
• Check that the power switch is turned OFF and connect the power cord to the power receptacle.
• Be sure to connect the earth wire.
• In case where the buzzer keeps beeping immediately after turning ON the power, there is a possibility
of the wrong connection of cord or wrong power voltage. Turn OFF the power.
1) When the needle bar is in its UP position, zigzag origin detection is performed.
2) When the needle bar is in the position other than UP position :
Display as shown in the figure below appears. Turn the handwheel to bring the needle bar to needle UP
position and the display changes to the next screen. Then the needle moves left and right, and zigzag
origin detection is performed.
(2) How to operate the pedal
h
A
B
C
D
E
The pedal is operated in four stages.
1) Lightly depress the front part of the pedal for low-
speed operation B .
2) Further depress the front part of the pedal for high-
speed operation A. (Note that the sewing machine
will enter the high-speed operation mode after the
completion of reverse feed stitching if the automatic
reverse feed stitching function is specified with the
corresponding switch.)
3) Bring the pedal back to its neutral position, and the
sewing machine will stop running C.
(The needle stops in the highest / lowest position.)
4) Strongly depress the back part of the pedal, and
the thread trimmer will be actuated E.
Lightly depress the back part of the pedal, and the
presser foot will go up D. Further depress the back
part of the pedal, and the thread trimmer will be
actuated.
14
5.PREPARATION BEFORE SEWING
5-1. 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.
1) Turn the handwheel by hand to raise the needle to
its highest position.
2) Loosen the needle clamp screw 2 . Hold the needle
B
1
2
5-2. Removing the 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.
A
1so that the long groove B on the needle is facing
exactly toward you.
3) Insert the needle deep into the hole of the needle
bar in the direction of the arrow until it will go no
further.
4) Securely tighten the screw 2 .
5) Confirm that the long groove B on the needle faces
toward you.
1
5-3. Winding the bobbin 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.
1
7
5
6
B
A
C
2
8
3
1) Turn the handwheel by hand to raise the needle to
its highest position.
2) Raise bobbin case latch 1 and remove the bobbin
case.
1) Insert the bobbin deep into the bobbin winder spindle
5 until it will go no further.
2) Pass the bobbin thread pulled out from the spool rested
on the right side of the thread stand following the order
from 1 as shown in the figure on the left. Then, wind
the end of the bobbin thread on the bobbin several times.
3) Press the bobbin winder adjusting plate 6 in the
direction of A and start the sewing machine. The
bobbin rotates in the direction of C and the bobbin
thread is wound up. The bobbin winder spindle 5 will
automatically stop as soon as the winding is finished.
4) Remove the bobbin and cut the bobbin thread with
the thread cut retainer 8 .
5) To adjust the winding amount of the bobbin thread,
loosen setscrew 7 and move bobbin winder adjusting
plate 6 to the direction of A or B. Then, tighten
setscrew 7.
To the direction A : The amount is decreased.
To the direction B : The amount is increased.
15
(Threading)
2
6) In case that the bobbin thread is not wound evenly
on the bobbin, loosen the nut 4 and turn the bobbin
thread tension to adjust the height of the thread
tension disk 2.
A
2
4
• It is the standard that the center of the bobbin is
as high as the center of the thread tension disk.
• Move the position of the thread tension disk 2 to
the direction A as shown in the figure on the left
B
2
when the winding amount of the bobbin thread on
the lower part of the bobbin is excessive and to
the direction B as shown in the figure on the left
when the winding amount of the bobbin thread on
the upper part of the bobbin is excessive.
After the adjustment, tighten the nut 4 .
1
7) Turn the thread tension nut 3 to adjust the tension
of the bobbin thread winder.
3
2
Note 1. When winding bobbin thread, start winding
in the state that the thread between bobbin
and thread tension disk 2 is tense.
2. When winding bobbin thread in the state that
the sewing is not performed, remove needle
thread from the thread path of the thread
take-up and remove bobbin from the hook.
5-4. Placing the bobbin case and the bobbin
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) Turn the handwheel by hand to raise the needle to
its highest position.
2) Take a bobbin by your right hand with the thread
drawn out about 5 cm from the thread end of the
bobbin and place it into the bobbin case as
illustrated.
3) Thread the bobbin case in the order of the numbers
and pull it out through the thread path as illustrated.
The bobbin rotates in the bobbin case in the direction
shown by arrow when bobbin thread is drawn.
4) Raise bobbin case latch 1 and hold it between your
two fingers as shown in the figure on the left.
5) Insert the bobbin case into the sewing hook shaft as
far as it will go by putting your hand from the under
cover of the inner hook. (Click sounds.)
6) Release the bobbin case latch to let it steadily rest
in the closing position.
■How to use the bobbin case thread hole
1) Use hole A mainly for zigzag stitches other than
standard zigzag stitch and scallop zigzag stitch.
2) Use hole B mainly for standard zigzag stitch and
scallop zigzag stitch.
1
3
2
A
1
B
A
Cau tion
There may be a case where several stitches at the start of sewing are difficult to be knotted when
thread trimmer is used with thin filament thread such as (#50, #60 or #80) using hole B. At this time,
use the other hole or perform the sewing starting from the right.
16
5-5. Threading the machine head
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.
4
1
3
2
LZ-2290A-7
With thread
trimmer
LZ-2290A
Without thread
trimmer
With auxiliary
thread take-up
1) Turn the handwheel by hand to bring the needle to the most raised position.
2) Pass the thread in the order of the numbers as illustrated.
3)
Pull out the thread about 10 cm from the needle after passing it through the needle.
Without auxiliary
thread take-up
5
5-6. Adjusting the stitch length
A
1
2
1) Turn the stitch length dial 1 in the direction of the
arrow so that the number corresponding to the desired
stitch length meets the marker dot A engraved on
the machine arm.
2) Numbers on the stitch length dial are calibrated in
mm.
3) To perform reverse feed stitching, press down the
feed lever 2 . The sewing machine performs reverse
feed stitching as long as you keep the feed lever held
pressed. The feed lever will return to its home position
and the sewing machine will run in the normal stitching
direction when you release the feed lever.
5-7. Adjusting the condensation stitching
Turn the thread
once.
Stitch length can be reduced at the start or end of
sewing. This feature is used for fastening stitch.
B
1) Turn condensation stitching adjusting dial 3 in the
direction of the arrow mark, and adjust the desired
number to engraved dot B on the machine arm.
2) The number of the graduation is shown in the unit of mm.
3
1
3) Turn condensation stitching adjusting dial 3 in the
direction of + to reduce the reverse feed stitch length.
Example : When stitch length dial 1 is used with the
graduation of +2, the maximum adjustment value of
condensation stitching adjusting dial 3 becomes -2.
(It is possible to adjust within the range of -2 to +2.)
Maximum feed amount is regulated to ±2 according to the gauge delivered (feed dog : 22581508).
Reference
Adjustment can be performed up to the range of maximum +5 to -4 by replacing the gauge
(feed dog : 22540009).
4) Note that the graduations on the dial are mere reference. Adjust the condensation stitching while actually
observing the finished seam.
17
6. HOW TO USE THE OPERATION PANEL
6-1. Names and functions of the respective sections
13 4
!8
!6
!7
2
1 Re-sewing switch
2 Needle up/down compensating switch
3 Screen changeover switch
4
With/without reverse feed stitch at sewing start switch
5
With/without reverse feed stitch at sewing end switch
6Reset switch
7 Teaching switch
5
!0
!4
8 Information switch
9 Edge sensor switch
!0 One-shot stitching switch
!1
With/without automatic thread trimmer switch
!2Thread trimming prohibiting switch
!3Counter value setting switch
!4
Max.speed limitation variable resistor
!1 8
9
!2
!5
6 !3
7
!5Power display lamp
!6 Smart media cover
!7 Smart media slot
(Smart media inserting opening)
!8 Smart media
Optional :
（ ）
Part No.HX005750000
1 Re-sewing switch
2 Needle up/down
compensating switch
3 Screen changeover
switch
4 With/without reverse feed stitch
at sewing start switch
5 With/without reverse feed stitch
at sewing end switch
6 Reset switch
This switch is used to continue sewing from the step on the way
after replacing bobbin thread when bobbin thread has run out during
program stitching step.
This is the switch to perform needle up/down compensating stitching.
(Needle up/down compensating stitching and one stitch compensating
stitching can be changed over with function setting No. 22.)
This is the switch to change over the screen.
This is the switch to turn ON/OFF automatic reverse feed stitch at sewing start.
* This switch cannot be used with the sewing machine which is not provided with
automatic reverse feed stitching device.
For the details, see p. 42.
This is the switch to turn ON/OFF automatic reverse feed stitch at sewing end.
* This switch cannot be used with the sewing machine which is not provided with
automatic reverse feed stitching device.
For the details, see p. 42.
This is the switch to make the value of bobbin thread counter or
sewing counter the set value.
For the details, see p. 67.
18
7 Teaching switch
This is the switch to set the setting of the number of stitches with
the value of number of stitches which has been actually sewn.
8 Information switch
9 Edge sensor switch
!0
One-shot stitching switch
!1 With/without automatic
thread trimmer switch
!2 Thread trimming
prohibiting switch
!3 Counter value setting
switch
This is the switch to perform various function settings.
This switch cannot be used with LZ-2290A.
When this switch is set to effective at the time of program stitching,
the sewing machine automatically operates up to the specified
number of stitches.
When this switch is set to effective at the time of program stitching,
the sewing machine automatically performs thread trimming when
the specified number of stitches has been completed.
This switch prohibits all thread trimmings.
* This switch cannot be used with the sewing machine which is not
provided with the automatic thread trimming device.
This is the switch to set the value of bobbin thread counter or No. of
pcs. counter.
!4 Max. speed limitation variable
resistor
!5 Power display lamp
!6Smart media cover
!7 Smart media slot
(Smart media inserting opening)
When moving the resistor in the left direction, max. speed is limited.
This lamp lights up when the power switch is turned ON.
This is the cover for smart media inserting opening.
To open the cover, place your finger on the notch located on the
side of the cover as shown in the figure and push the cover in the
direction of left slanting rear.
* The respective functions of the operation panel do not work with
the cover opened.
Do not close the cover unless smart media is completely inserted.
For the details, see p. 75.
To set smart media, insert smart media into smart media slot and
push it until it is almost hidden.
To remove smart media, push it further again and it protrudes to the
position where it can be held between your fingers. Now, draw it out.
* Be very careful of the inserting direction of smart media.
For the details, see p. 75.
19
6-2. Before setting the pattern
WARNING :
Provide a clearance of 0.5 mm or more between the needle and the gauges when replacing the gauges
such as presser foot, throat plate, etc.
If the clearance is smaller than the specified value, it is in danger of
causing the needle to be broken or the like.
(1) Limitation of the max. zigzag width
1
Impor tant
■Changeover of limiting procedure of max. zigzag width limitation value
2
• Max. zigzag width can be limited in accordance with the gauge.
• There are two kinds of limitations of max. zigzag width.
(1) Zigzag width symmetrical in the center
(2) Specifying left/right positions
Max. zigzag width limitation value and reference of stitch base line are displayed when the
power is turned ON.
1：
Max. zigzag width limitation value (Screen changes in case of specifying left/right positions.)
2：Reference of stitch base line
Max. zigzag width limitation value and reference of stitch base line can be performed with ON/OFF.
1) Press switch 1.
0.50.5
3
3
1
2) Press switch 2.
2
3) Figure on the left side is the
zigzag width symmetrical in
the center mode.
Every time switch 3 is
pressed, specifying left/
right positions and zigzag
width symmetrical in the
center can be changed
over alternately.
⇔
(1) Zigzag width symmetrical in the center
20
(2) Specifying left/right positions
■
How to set max. zigzag width limitation value
Determine whether limitation of zigzag width
symmetrical in the center or limitation of left/right
positions in the order of 1) to 3) of the previous page
in accordance with the gauge used.
Limitation of zigzag
width symmetrical
in the center
0.0 0.0
L = -3.3
Setting
Limitation of left/
right positions
R = +4.7
Setting
Max. zigzag
width limitation
value
–4.0 +4.0 –3.3 +4.7
(A) In case of zigzag width symmetrical in the center
4
4
8.0
limitation area
1
Max. zigzag
width limitation
value
8.0
Zigzag
1) Press +/– of switch 4 and
set the limitation value.
In case of the example, set the
value to 8.0.
2) Press switch 1 and the
screen returns to the
previous one.
(B) In case of specifying left/right positions
5
5
6
6
1
Change of left side position
limitation
1) Press +/– of switch 5 to
set the left side limitation
value.
In case of the example, set the
value to -3.3.
Change of right side position
limitation
2) Press +/– of switch 6 to
set the right side limitation
value.
In case of the example, set the
value to +4.7.
3) Press switch 1 and the
screen returns to the
previous one.
21
(2) Setting the reference of stitch base line
• Reference position of stitch base line can be set to left, center and right.
Reference of left
stitch base line
0.0 0.0 0.0
■How to set
Reference of center
stitch base line
Reference of right
stitch base line
1) Press switch 1.
2
3
3
1
1
2) Press switch 2.
3) Figure on the left side
shows the reference of
center stitch base line.
Every time switch 3 is
pressed, reference of left
stitch base line, that of right
stitch base line and that of
center stitch base line are
changed over and set
alternately.
Reference of left
stitch base line
Reference of center
stitch base line
Reference of right
stitch base line
22
4) Press switch 1 and the
screen returns to the
previous one.
6-3. Basic screen
The screen after turning ON the power source becomes the screen at the time of turning OFF the power source
for the last time.
Every time
Example) Free stitching of standard zigzag with reverse feed stitching (Contents of display change depending
■
Sewing shape list first screen
Selection of each shape is
performed.
* Free stitching means the
■
Sewing shape setting screen
Setting of zigzag width, position of stitch base line, etc. is performed.
switch is pressed, the screen changes as follows :
on the set values.)
general sewing.
Press .
s
Press .
t
Press .
■ Sewing shape list second screen
Press .
■Reverse feed stitching setting screen
Setting of kind of condensation, number of stitches, etc. is performed.
Press .
Impor tant
When is pressed for approximately three seconds in a screen other than the sewing
shape list screen, the screen directly transits to the sewing shape list screen.
23
6-4. List of the display pictographs of each screen
■Sewing shape list first screen
Straight stitch
Standard zigzag stitch
Blind stitch
■Sewing shape list second screen
Continuous stitching
2-step zigzag stitch
PatternCustomScallop
3-step zigzag stitch
Cycle stitching
■Scallop selection pop-up screen
Right standard Right crescent
Left equal 12 stitchesLeft equal 24 stitchesLeft standard Left crescent
Right equal 12 stitchesRight equal 24 stitches
24
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