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LZ-2290A/IT-100D/SC-915
Instruction Manual
122 pgs4.59 Mb0
Table of contents
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JUKI LZ-2290A/IT-100D/SC-915 Instruction Manual

ENGLISH
LZ-2290A / IT-100D / SC-915
INSTruCTIoN MANuAL

CoNTENTS

1. NAME oF EACH CoMPoNENT ..................................................................................................1
2. SPECIFICATIoNS .........................................................................................................................
3. STITCH PATTErN TABLE ........................................................................................................... 3
4. INSTALLATIoN .............................................................................................................................
(1) Preparation of wiring ........................................................................................................................................7
(2) Connecting the connectors ...............................................................................................................................
(1) Turn ON the power ......................................................................................................................................... 14
(2) How to operate the pedal ............................................................................................................................... 14
5.
PrEPArATIoN BEForE SEWING ...........................................................................................
6. HoW To uSE THE oPErATIoN PANEL .................................................................................. 18
(1) Limitation of the max. zigzag width ................................................................................................................20
(2) Setting the reference of stitch base line .........................................................................................................
(1) Selecting the zigzag pattern .......................................................................................................................... 35
(1) 2-step zigzag, 3-step zigzag and 4-step zigzag stitch .................................................................................... 37
(2) Scallop stitching .............................................................................................................................................
(3) Blind stitch sewing ..........................................................................................................................................
(4) Custom pattern stitching .................................................................................................................................
(1) Standard condensation ..................................................................................................................................43
(2) 2-point condensation ......................................................................................................................................
(3) Condensation custom .....................................................................................................................................
(4) Comparison table of the reverse stitch of each shape ...................................................................................
(1) Overlapped stitching ....................................................................................................................................... 48
(2) Programmed stitching ....................................................................................................................................
(1) Custom pattern setting ................................................................................................................................... 50
(2) New creation of the custom pattern ...............................................................................................................
(3) Custom pattern edit ........................................................................................................................................
(4) Registration, copy and deletion of the custom pattern ...................................................................................
(1) Condensation custom setting ......................................................................................................................... 54
(2) Condensation custom edit ..............................................................................................................................
(1) Setting the pattern stitching ............................................................................................................................ 56
(2) Registering the pattern stitching .....................................................................................................................
(3) Copy and deletion of the pattern stitching ......................................................................................................
15
22
38 40 41
44 46 47
48
51 52 52
55
57 58
2
4
8
i
(1) New creation of the continuous stitching ........................................................................................................ 60
(2) Continuous stitching edit ................................................................................................................................
(3) Copy and deletion of the continuous stitching ................................................................................................
60 62
(1) New creation of the cycle stitching ................................................................................................................. 63
(2) Cycle stitching edit .........................................................................................................................................
(3) Copy and deletion of the cycle stitching .........................................................................................................
(4) Teaching .........................................................................................................................................................
(5) Performing the constant-dimension stitching using the cycle stitching ..........................................................
63 65 66 67
(1) Thread trimming counter ................................................................................................................................ 67
(2) Bobbin thread counter ....................................................................................................................................
67
(1) Sewing common data ..................................................................................................................................... 69
(2) Sewing management information ...................................................................................................................
(3) Communication mode ....................................................................................................................................
71 74
(1) How to change over to the function setting mode .......................................................................................... 78
(2) Function setting list ........................................................................................................................................
(3) Detailed explanation of selection of functions ................................................................................................
81 85
(1) Media slot ....................................................................................................................................................... 91
(2) Ethernet port .................................................................................................................................................. 91
(3) RS-232C port .................................................................................................................................................91
(4) General input port (Production control switch connecting connector) ............................................................ 91
7. SEWING ...................................................................................................................................... 94
8. STANDARD ADJUSTMENT ....................................................................................................... 98
9. MAINTENANCE ........................................................................................................................ 108
(1) Replacing the power fuse ............................................................................................................................. 108
(2) Adjusting the contrast of the operation panel display ...................................................................................
(3) Draining (Bird’s nest prevention (CB) type only) ..........................................................................................
(4) Cleaning the dust bag (Bird’s nest prevention (CB) type only) .....................................................................
(5) Cleaning the cooling fan installed on the under cover ..................................................................................
(6) Cleaning the hook section ............................................................................................................................
(7) Cleaning the rear cover of the control box ...................................................................................................
(8) Cleaning the operation panel screen ...........................................................................................................
(9) Replacing procedure of the hook shaft oil wick ............................................................................................
(10) USB port ......................................................................................................................................................111
108 109 109 109 110 110 110 110
10. AT A TIME LIKE THIS ! ........................................................................................................... 112
11. Error DISPLAY
.................................................................................................................... 113
12. TrouBLES AND CorrECTIVE MEASurES ...................................................................... 117
ii

1. NAME oF EACH CoMPoNENT

!5
!4
4
3
2
!6
!3
!2
!1
!7
o
Needle thread draw-out device (LZ-2290A(U)-7)
1
Wiper switch (WB,CB type)
2
Thread take-up cover
3
Finger guard
4
Thread tension controller (Rotary tension)
5
Electrical box
6
Pedal
7
Knee lifter lever
8
Power switch
9
q
t
!0
i
y
u
Hand switch
!0
Stitch length dial
!1
Condensation dial
!2
Operation panel
!3
Bobbin winder
!4
Tension controller No. 1 (Pre-tension)
!5
Thread stand
!6
Oil supply opening
!7
Mirror inversion switch
!8
!8
– 1 –
– 2 –

2. SPECIFICATIoNS

2-1. Specications 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 sti/min (*1) 4,500 sti/min (*1) Max. zigzag width Max. feed pitch 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 - Equivalent continuous emission sound pressure level (L
Model
Application Light-weight materials to medium-weight materials Max. sewing speed 4,000 sti/min (*1) Max. zigzag width Max. feed pitch 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 - Equivalent continuous emission sound pressure level (L
Minute-quantity
（　　　　 ）
lubricating type
(Dry-head type)
10 mm (*2)
5 mm (stepless ne adjustment) 2.5 mm (stepless ne adjustment)
) at the workstation :
pA
A-weighted value of 80.0 dB; (Includes K 11204 GR2 at 4,500 sti/min.
LZ-2290A-DS LZ-2290A-DS-7 LZ-2290A-DU LZ-2290A-DU-7
5 mm (stepless ne adjustment) 2.5 mm (stepless ne adjustment)
A-weighted value of 80.0 dB; (Includes K 11204 GR2 at 4,500 sti/min.
= 2.5 dB); according to ISO 10821- C.6.2 -ISO
pA
10 mm (*2)
) at the workstation :
pA
= 2.5 dB); according to ISO 10821- C.6.2 -ISO
pA
* 1. The max. sewing speed is limited by the amount of zigzag width per stitch. Up to 4 mm : 5,000 sti/min (LZ-2290A-SU : 4,500 sti/min, LZ-2290A-DS
•
A-DU (-7) : 4,000 sti/min),
up to 5 mm : 4,000 sti/min, up to 6 mm : 3,500 sti/min, up to 8 mm : 3,000 sti/min
• 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. Specications 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

3. STITCH PATTErN TABLE

-
Name of pattern
Straight stitch
2-step zigzag stitch
3-step zigzag stitch
4-step zigzag stitch
Stitch pat
tern
Number of stitches
for pattern
1
2
4
6
Max.zigzag width
—
10
10
10
Remarks
Scallop (right)
Scallop (left)
Standard scallop
Crescent scallop
Equal-width scallop
Equal-width scallop
Standard scallop
Crescent scallop
Equal-width scallop
24
12
24
10
10
Equal-width scallop
Blind stitch (right)
Blind stitch (left)
Custom pattern
12
a
2+a
a
500
10
10—
– 3 –
– 4 –

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, nger guard, etc.

4-1. Installation of the sewing machine head

Installing the under cover
■
1) The under cover should rest on the four corners
3
3
of the machine table groove.
23.5 mm
3
2
8
7
1
1
A
5
4
B
1
19.5 mm
3
2) Fix two rubber seats side) using nails
on side
1
as illustrated above. Fix two
2
(operator’s
A
cushion seats 3 on side B (hinged side) using a rubber-based adhesive. Then place under cover
on the xed seats.
4
3) Remove air vent cap bed. (Be sure to attach cap
attached to the machine
5
when transporting
5
the machine head in the state that the machine head is removed from the machine table.)
If the sewing machine is operated with­out removing air vent cap 5, oil leakage from gear box portion 7 may occur.
4) Fit hinge
into the opening in the machine bed,
1
and t the machine head to table rubber hinge 8
before placing the machine head on cushions 3 on the four corners.
6
9
4
1
5) Attach head support rod
to the machine table.
6
(However, this step is not necessary for the ma
chine with AK
device.)
9
-

4-2. Removing the needle bar stopper

1

4-3. Attaching the knee-lifter

220 mm
Remove needle bar stopper
Keep the needle bar stopper which has been removed, and install this needle bar stopper when transporting the 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.
Insert knee lifter pad
into attaching hole
1
for transportation.
1
2
and
tighten it with bolt 3.
* Adjust the position of knee lifter pad 1 to a con-
venient place. For the reference dimension, the
position is 220 mm from the bottom face of table.
2
1
3

4-4. Adjusting the height of the knee lifter

1) The standard height of the presser foot lifted us-
ing the knee lifter is 10 mm.
2) You can adjust the presser foot lift using knee
lifter adjust screw 1.
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.
4
2
3
– 5 –
– 6 –

4-5. Installing the electrical box

5
1
6
7
Install the electrical box on the under side of the
table using round-head bolts
spring washers 3 and nuts
chine at the location illustrated, and using bolt having
hexagonal indentation on the head
and plain washer 7 supplied with the machine at
6
the location illustrated.
2
3
4
4-6. Connecting the power switch cord
1) Loosen screw 1 located on the side of the power
2) Connecting the input power cord of electrical box
When the input power cord of electrical box is 4P
¡
1
8
6
9
B
7
2
A
5
4
3
Put 4P cord from hole A of the power switch and
securely x green/yellow cord to
black cord to 3 and red cord to
When the input power cord of electrical box is 3P
¡
Put 3P cord from hole A of the power switch and
securely x green/yellow cord to 5, brown cord to
2
3) Connecting the power cable supplied as accessories
In case of 3-phase power cable
¡
Put power cable from hole B of the power switch, and
In case of single phase power cable
¡
Put power cable from hole B of the power switch,
4) Installing the power switch cover
Securely tighten screw 1 located on the side of
, plain washers
1
supplied with the ma
4
, spring washer
5
2
,
-
(Japan and general export area)
switch supplied as accessories and remove the power switch cover.
, white cord to
5
with screws.
4
and sky blue cord to 3 with screws.
securely x green/yellow cord to 9, white cord to 6,
black cord to 7 and red cord to 8 with screws.
and securely x green/yellow cord to 9 and other
cords to 6 and 7 with screws. 8 is not used.
the power switch.
2
,

4-7. Installing the operation panel (IT-100D)

1
2
3
3
3
1) Install operation panel using screws 3 which have been assembled to panel installing bracket
on the machine head
1
.
2
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 specications, be sure to connect all the corresponding connectors to the specied places.
• To prevent personal injury caused by maloperation, be sure to lock the connector with lock.
• As for the details of handling respective devices, read carefully the Instruction Manuals supplied with the devices before handling the devices.

(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 xing the rear cover of
the electrical box. When opening the rear cover,
pressing it with your hands, slowly open it by ap
-
proximately 90˚ until it stops as illustrated.
E
Slowly
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.
4) Remove the locks of cord clamps a, b, c, d, e, and f.
b
a
e
f
c
d
How to remove the cord clamp
1
Lightly pressing
1
Pull down the clamp.
2
The clamp goes up.
3
3
2
1
* See P.11 for how to lock the cord clamp.
– 7 –
– 8 –

(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.)
• 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
b
2
B
Connect cords in the following order.
5) Insert yellow/green earth cord
coming from
1
the machine head inside the electrical box
through front cover through hole B, and pass it
through cord clamp “b” as illustrated and tighten
it with screw at the position 2 in the illustration.
6) Insert white square connector 9P black cord 3
coming from the machine head inside the electri
cal box through front cover through hole B, and
insert it into connector CN38 4 of the circuit
board attached to the front cover.
-
3
4
7) Insert white connector 4P black cord 5 coming
from the machine head inside the electrical box
B
through front cover through hole B, and insert it
into connector CN21 6 of the circuit board at-
6
5
tached to the front cover.
8) Insert white connector 26P cord 7 coming
B
from the operation panel inside the electrical
box through front cover through hole B, pass it
through cord clamps “b”, “c” and “d”, insert it into
u
b
connector CN34 8, and lock it.
d
c
i
9) Insert black connector 4P white cord
coming
9
from the machine head inside the electrical box
through front cover through hole B, and insert it
into connector CN31
o
b
c
!0
!0
.
10) Insert gray round connector 7P cord
!1
com-
ing from the machine head inside the electrical
box through front cover through hole B, pass it
through cord clamp “a”, and insert it into connec-
!1
a
!2
tor CN30 !2.
11) Insert white connector 12P cord
coming from
!3
the machine head inside the electrical box through
b
front cover through hole B, pass it through cord
clamps “b”, “c”, “d” and “g”, and insert it into con
-
nector CN53 !4.
c
d
!3
g
!4
Close cord clamps “b”, “c” and “d”.
12) Insert white connector 6P three cords !5 com-
ing from the machine head inside the electrical
box through front cover through hole B, pass it
!5
a
e
!6
a
!7
!8
f
e
through cord clamps “a” and “e”, and insert it into
connector CN54 !6.
13) Insert white connector 10P cord !7 and blue connector 2P cord
coming from the machine
!8
head inside the electrical box through front cover through hole B, pass them through cord clamps “a”, “e” and “f”, and insert the white 10P into con-
!9
@0
nector CN51
The blue 2P connector is attached only for the machine with thread trimmer.
and the blue 2P into CN46
!9
@0
.
Close cord clamps “a”, “e” and “f”.
– 9 –
– 10 –
@2
@1
f
e
a
When the Auto-lifter (AK121) is used :
14) Insert white connector 2P cord
coming from
@
1
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
a
When the bird’s nest prevention device is used (CB type)
15) Insert white small connector 6P cord
@3
com-
ing 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.
@4
When foot pedal for standing work (PK70 or 71) is
b
c
used :
16) Insert black connector 12P cord
inside the
@5
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
@5
@6
.
@7
@7
@8
#0
@9
17) Connect white connector 2P of cord @7 sup-
plied as accessories to which red connector 2P
and white connector 2P are attached to white
connector 2P
of under cover of the machine
@8
head.
Fix omega lock
supplied as accessories with
@9
the neighboring cords and cord @7 as shown in
the gure.
18) Insert red connector 2P side of cord
as accessories to which red connector 2P and
white connector 2P are attached inside the elec
trical box through front cover through hole, and
insert it into red connector CN25 #0.
supplied
@7
-
How to lock the cord clamp
When the insertion of the connector is completed,
lock the cord clamps.
4
Lightly press the corner of clamp.
4
(Cord clamp is locked with a click.)
2
C
1
B
A
4
3
Clamp

4-9. Attaching the connecting rod

3
Take care so that the cord is not caught between
q
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.
Press down cord presser plate C of cord through
w
hole B of the front cover, press the cord, and
tighten screws 2.
1) Fix connecting rod
lever
with nut
2
2) Installing connecting rod
to installing hole
1
.
3
to installing hole A
1
of pedal
B
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 con-
necting 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 –
– 12 –

4-11. Installing the thread stand

1) Assemble the thread stand unit, and insert it in
the hole in the machine table.
2
2) Tighten locknut 1 to x the thread stand.
3) For ceiling wiring, pass the power cord through
spool rest rod 2.
1

4-12. Installing the bird’s nest prevention (CB) type sewing machine

(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.)
with wood screw
1
2
supplied with the sewing machine as accesso-
ries.
3) Fix regulator (total asm.)
with wood screw
3
4
supplied with the sewing machine as accesso-
ries.
4) Connect ø6 and ø8 hoses attached to regulator
(total asm.)
to the respective solenoid valves.
3
9
9
5
5
6
5) Insert dust bag 5 into the top end of hose
dust bag and x it with band
supplied with the
6
sewing machine as accessories.
9
for
ø 8
ø 4
!1
7
!0
8
!1
!0
6) Adjust solenoid valve cord (asm.) 7 to the so­lenoid valve and the hot marker of the cord, and connect it.
Connect 6P connector
to CM52 connector
!0!1
inside the electrical box.(Refer to “When the bird’ s 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
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 do not hang from the table.
supplied as accessories.
8
9) Connect the air pipe
!2
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 inammation 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 ll the oil tank with JUKI New Defrix Oil No. 1 using the oiler supplied with the machine.
2) Fill the oil tank with oil up to the place where the top of oil amount indicating rod 3 aligns with the upper engraved line of oil amount indicating window 2. If the oil is lled 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, rell oil if
the top end of oil amount indicating rod 3 comes down to the lower engraved marker line of oil amount indicating window 2.
2
1
3
2
Upper engraved marker line
Lower engraved marker line
and set the air pressure
!2
• When you use a new sewing ma chine or a sewing machine after an extended period of disuse, run your machine at 3,000 to 3,500 sti/min for the purpose of break-in.
• For the oil for hook lubrication, pur chase JUKI New Defrix Oil No. 1 (Part No. : MDFRX1600C0).
-
-
– 13 –
– 14 –

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 possi bility 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 gure 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 low­speed operation
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 specied 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 posi-
tion.)
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.
B
.
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.
B
1
2
A

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.
1) Turn the handwheel by hand to raise the needle
to its highest position.
2) Loosen the needle clamp screw 2 . Hold the nee-
dle 1 so that the long groove
on the needle is
B
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) Conrm 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
B
A
C
6
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 bob-
bin case.
1) Insert the bobbin deep into the bobbin winder spindle
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 gure on the left. Then, wind the end of the bobbin thread on the bob bin several times.
3)
Press the bobbin winder adjusting plate 6 in the direction of A and start the sewing machine. The bob bin rotates in the direction of C and the bobbin thread is wound up. The bobbin winder spindle
matically stop as soon as the winding is nished.
4) Remove the bobbin and cut the bobbin thread with the thread cut retainer
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
To the direction A : The amount is decreased. To the direction B : The amount is increased.
until it will go no further.
5
.
8
will auto-
5
7
.
-
-
– 15 –
– 16 –
(Threading)
1
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 gure 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 gure 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 .
7) Turn the thread tension nut 3 to adjust the ten­sion of the bobbin thread winder.
Note 1. When winding bobbin thread, start winding
3
2. When winding bobbin thread in the state
2
in the state that the thread between bobbin and thread tension disk 2 is tense.
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 ngers as shown in the gure 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 2-step zigzag stitch and scallop zigzag stitch.
2) Use hole B mainly for 2-step zigzag stitch and scallop zigzag stitch.
1
3
2
1
B
A
There may be a case where several stitches at the start of sewing are difcult to be knotted when thread trimmer is used with thin lament 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.

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.
5
2
3
1
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
4
6

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
B
sewing. This feature is used for fastening stitch.
1) Turn condensation stitching adjusting dial
3
in
the direction of the arrow mark, and adjust the de
3
1
sired number to engraved dot arm.
2)
The number of the graduation is shown in the unit of mm.
3)
Turn condensation stitching adjusting dial
on the machine
B
in the
3
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). 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 actu-
ally observing the nished seam.
– 17 –
-
– 18 –

6. HoW To uSE THE oPErATIoN PANEL

6-1. Names and functions of the respective sections

!7
1 4 5
2
3
!7
Re-sewing switch
1
Teaching 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
Material edge sensor switch
7
One-shot automatic sewing switch
8
With/without automatic thread trimmer switch
9
7
8
96
Thread trimming prohibiting switch
!0
Backlight switch
!1
Reset switch
!2
Information switch
!3
+ switch
!4
– switch
!5
Counter/speed changeover switch
!6
General-purpose switch
!7
Power display lamp
!8
!1 !2 !4 !5
!8
!6!3!0
Re-sewing switch
1
Teaching switch
2
Needle up/down compen­sating switch
3
Screen changeover switch
4
With/without reverse feed stitch at sewing start switch
5
Switch Description
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 set the setting of the number of stitches with the value of number of stitches which has been actu­ally sewn.
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.
Switch Description
With/without reverse feed stitch at sewing end switch
6
Edge sensor switch
7
One-shot automatic sewing
switch
8
With/without automatic
thread trimmer switch
9
Thread trimming prohibiting
switch
!0
Backlight switch
!1
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.
Selects use/disuse of the material edge sensor in the case
the material edge sensor (edge) is installed on the sewing
machine.
When this switch is pressed, the sewing machine automati-
cally operates until the material edge sensor detects the
material edge or until the set number of stitches is reached.
This switch is used to automatically trim the thread when the material edge sensor detects the material edge or until the set number of stitches is reached.
* This switch cannot be used with the sewing machine
which is not provided with the automatic thread trimming
device.
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 switch is used to change over the operation of the
backlight of the LCD between ON and OFF.
Reset switch
!2
Information switch
!3
Plus switch
!4
Minus switch
!5
Counter/speed changeover
!6
switch
General-purpose switch
!7
This is the switch to make the value of bobbin thread coun-
ter or sewing counter the set value. This switch is enabled
after thread trimming.
This switch is used to change over the screen between the
information function screen (sewing common data mode,
function setting mode, communication mode, version dis-
play, etc.) and the normal sewing screen.
This switch is enabled after thread trimming.
This switch is used to increase the set value of the bobbin
thread counter or the number of pcs. counter at the time of
setting. It should be remembered that this switch is enabled
after thread trimming.
This switch is used to decrease the set value of the bobbin
thread counter or the number of pcs. counter at the time of
setting. It should be remembered that this switch is enabled
after thread trimming.
This switch is used to change over the display between the
counter display and the maximum sewing speed limitation
display.
This switch has different functions depending on the
screen.
– 19 –
– 20 –

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 specied value, it is in danger of causing the needle to be broken or the like.

(1) Limitation of the max. zigzag width

q
Changeover of limiting procedure of max. zigzag width limitation value
■
w
• 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.
Max. zigzag width limitation value (Screen changes in case of specifying left/right positions.)
1：
Reference of stitch base line
2：
Max. zigzag width limitation value and reference of stitch base line can be performed with ON/OFF.
0.5
1) Press switch 1.
0.5
e
e
w
q
2) Press switch 2.
3) Figure on the left side is
the zigzag width symmet-
rical in the center mode.
Every time switch
pressed, specifying left/ right positions and zigzag width symmetrical in the center can be changed over alternately.
3
is
⇔
(1) Zigzag width symmetrical in the center
(2) Specifying left/right positions
How to set max. zigzag width limitation value
■
Determine whether limitation of zigzag width symmet-
rical in the center or limitation of left/right positions
in the order of 1) to 3) of the previous page in accor-
dance 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
–4.0 +4.0
(A) In case of zigzag width symmetrical in the center
4
4
Max. zigzag width limitation value
8.0
1
Max. zigzag width limitation value
8.0
–3.3 +4.7
Zigzag
limitation area
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
6
5
6
5
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 limita-
tion 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 –
– 22 –

(2) Setting the reference of stitch base line

• Reference position of stitch base line can be set to left, center and right.
Reference of center
stitch base line
How to set
■
Reference of left
stitch base line
0.0 0.0 0.0
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 alter-
nately.
Reference of left
stitch base line
Reference of center
stitch base line
Reference of right
stitch base line
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
switch is pressed, the screen changes as follows :
Example) Free stitching of
on the set values.)
Sewing shape list rst screen
■
Selection of each shape is performed.
* Free stitching means the general sewing.
Sewing shape setting screen
■
Setting of zigzag width, position of stitch base line, etc. is performed.
2-step zigzag with reverse feed stitching (Contents of display change depending
Sewing shape list second screen
■
Press .
Press .
s
Press .
t
Press .
Reverse feed stitching setting screen
■
Setting of kind of condensation, number of stitches, etc. is performed.
Press .
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 –
– 24 –

6-4. List of the display pictographs of each screen

Sewing shape list rst screen
■
Straight stitch
Scallop Custom Pattern
Sewing shape list second screen
■
2-step zigzag stitch
Continuous stitching
Blind stitch
3-step zigzag stitch
4-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
Blind stitch selection pop-up screen
■
Left blind stitch Right blind stitch
Custom pattern selection pop-up screen
■
Custom pattern new creation
Continuous stitching selection pop-up screen
■
Cycle stitching selection pop-up screen
■
Continuous stitching new creation
Cycle stitching new creation
The key lock level has been set to "1" at the time of delivery, and pictographs of new creation are not dis­played. When performing new creation in each mode, change the key lock level to "0". (Refer to the second screen of sewing common data setting of (1) Sewing common data of 6-15. Information. ) In addition, the display of pattern No. at the time of delivery is "1" only.
– 25 –
– 26 –
Straight stitch sewing shape setting screen
■
Kind of sewing
Free stitching
Programmed stitching
Overlapped stitching
Position of stitch base line
Pattern register
– 5.0
to
5.0
Sewing shape setting screen of 2-step zigzag stitch/3-step zigzag stitch/4-step zigzag stitch
■
Kind of sewing
Free stitching
Programmed stitching
Zigzag width
0
to
10.0
Position of stitch base line
– 5.0
to
5.0
Position at sewing start
Optional
Right
Position at sewing end
Pattern register
Optional
Right
Overlapped stitching
Left
Left
Scallop sewing shape setting screen
■
Kind of sewing
Free stitching
Programmed stitching
Zigzag width
0
to
10.0
Position of stitch base line
– 5.0
to
5.0
Position at sewing start Root • Crest
Root
Crest
Position at sewing end Root • Crest
Optional
Stop position
Pattern register
Optional
Root
Overlapped stitching
Right
Left
* Stop position is displayed when the position at sewing end is optional.
– 27 –
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