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Table of contents
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JUKI LZ-2290A-SR, IT-100E, SC-916 Instruction Manual

ENGLISH
LZ-2290A-SR / IT-100E / SC-916
INSTRuCTIoN MANuAL

CoNTENTS

1. NAME oF EACH CoMPoNENT .................1
2. SPECIFICATIoNS ........................................2
2-1. Specications of the machine head .............2
2-2. Specications of the electrical box ..............2
3. STITCH PATTERN TABLE ..........................3
3-1. Initial value of the stitch pattern and the
table .................................................................4
4. INSTALLATIoN ............................................6
4-6.
Connecting the power switch cord
(Japan and general export area)...................... 8
(1) Preparation of wiring .........................................9
(2) Connecting the connectors ............................ 10
4-12. Installing the bird’s nest prevention
(CB) type sewing machine ...........................15
(1) Turn ON the power ......................................... 18
(2) How to operate the pedal ............................... 18
5. PREPARATIoN BEFoRE SEWING ..........19
6. HoW To uSE THE oPERATIoN PANEL .22
6-1. Names and functions of
the respective sections ................................22
(1) Limitation of the max. zigzag width ................ 24
(2) Setting the reference of stitch base line ......... 26
(3) Setting the feed amount ................................. 27
6-4. List of the display pictographs of
each screen ...................................................29
(1) Selecting the zigzag pattern .......................... 52
(1) 2-step zigzag,
3-step zigzag and 4-step zigzag stitch........... 54
(2) Scallop stitching ............................................. 56
(3) Blind stitch sewing ......................................... 59
(4) Custom pattern stitching ................................ 60
(5) T stitch, left ..................................................... 61
(6) T stitch, right................................................... 62
(7) Pattern 1 ........................................................ 64
(8) Pattern 2 (fagoting) ........................................ 65
(9) Pattern 3 ........................................................ 67
(10) Pattern 4 ...................................................... 69
(1) Standard condensation .................................. 72
(2) 2-point condensation ...................................... 74
(3) Condensation custom .................................... 75
(4) Comparision table of
the reverse stitch of each shape .................... 76
(1) Overlapped stitching ...................................... 77
(2) Programmed stitching .................................... 78
(1) Custom pattern setting ................................... 80
(2) New creation of the custom pattern .............. 81
(3) Custom pattern edit ........................................ 82
(4) Pattern sewing registration,
custom pattern copy and custom pattern deletion of the custom pattern
.... 82
(1) Condensation custom setting ......................... 84
(2) Condensation custom edit ............................. 85
(1) Setting the pattern stitching ........................... 87
(2) Registering the pattern stitching .................... 89
(3) Copy and deletion of the pattern stitching ...... 89
(1) New creation of the continuous stitching ....... 91
(2) Continuous stitching edit ................................ 92
(3)
Copy and deletion of the continuous stitching
.... 94
(1) New creation of the cycle stitching ................. 95
(2) Cycle stitching edit ......................................... 95
(3) Copy and deletion of the cycle stitching ......... 97
(4) Teaching ......................................................... 98
(5) Performing the constant-dimension stitching
using the cycle stitching ................................. 99
(1) Thread trimming counter ................................ 99
(2) Bobbin thread counter .................................... 99
(1) Sewing common data .................................. 101
(2) Sewing management information ................ 103
(3) Communication mode .................................. 106
(1) How to change over to
the function setting mode..............................110
(2) Function setting list ......................................113
(3)
Detailed explanation of selection of functions
.... 117
(1) Media slot ..................................................... 122
(2) Ethernet port ................................................ 122
(3) RS-232C port ............................................... 122
(4) General input port (Production control switch
connecting connector) ................................. 122
7. SEWING ...................................................125
7-2. Adjusting the pressure of the presser foot ....
126
7-3. One-touch type reverse feed stitching
mechanism ..................................................126
i
8. STANDARD ADJuSTMENT ....................129
lubricating to face plate section ...............129
8-4. Adjusting the micro-lifting
mechanism of the presser foot .................130
8-9. Adjusting the needle-to-hook timing
and the needle guard .................................133
8-10. Adjusting the stop position of
the needle ....................................................134
8-12. Adjusting the needle thread
feeding device ............................................135
8-13. Adjusting the bird's nest prevention
(CB) type wiper ...........................................136
8-14. Replacing procedure of the bird’s nest
prevention (CB) type presser knife ...........137
9. MAINTENANCE .......................................138
9-2. Adjusting the contrast of
the operation panel display .......................139
9-3. Draining
(Bird’s nest prevention (CB) type only) ....139
9-4. Cleaning the dust bag
(Bird’s nest prevention (CB) type only) ....139
9-5. Cleaning the cooling fan installed on the
under cover .................................................140
9-7. Cleaning the rear cover of
the control box ...........................................140
9-9. Replacing procedure of
the hook shaft oil wick ...............................141
10. AT A TIME LIKE THIS ! ..........................143
11. ERRoR DISPLAY...................................144
12. TRouBLES AND CoRRECTIVE
MEASuRES.............................................149
ii

1. NAME oF EACH CoMPoNENT

!3
!2
4
3
2
!4
!1
!5
!7
o
Needle thread draw-out device
1
Wiper switch
2
Thread take-up cover
3
Finger guard
4
Thread tension controller (Rotary tension)
5
Electrical box
6
Pedal
7
u
Knee lifter lever
8
Power switch
9
Hand switch
!0
O
peration panel
!1
Bobbin winder
!2
Tension controller No.1
!3
(Pre-tension)
Thread stand
!4
y
q
t
!0
!6
i
Oil supply opening
!5
Mirror inversion switch
!6
Reverse feed control lever
!7
– 1 –
– 2 –

2. SPECIFICATIoNS

2-1. Specications of the machine head
Model
Minute-quantity lubricating type
LZ-2290A-SR-7-WB LZ-2290A-SR-7-CB
Application Light-weight materials to medium-weight materials
Max. sewing speed 5,000 sti/min (*1)
Max. zigzag width 10 mm (*2)
Max. feed pitch 5 mm (normal/reverse feed)
Stitch pattern 14 kinds 20 patterns
Needle SCHMETZ 438 #75 (Needle at the time of delivery)
Oil used JUKI New Defrix Oil No. 1
Thread trimmer With
Feed method Standard feed (Computer controlled system)
Wiper method Front sweeping method Side sweeping method
Thread clamp method ——— Air clamp method
- Equivalent continuous emission sound pressure level (LpA) at the workstation:
Noise
A-weighted value of 80 dB; (Includes KpA = 2.5 dB);
according to ISO 10821- C.6.2 -ISO 11204 GR2, at 4,600 sti/min.
* 1. The max. sewing speed is set to 4,000 sti/min at the time of delivery (depending on the delivery area).
•
The speed is limited by setting of the zigzag width of the sewing pattern and feed amount since the
speed is controlled by the amount of zigzag width per stitch and feed amount.
•
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
Electric power 600VA
Operating environment Temperature : 0 to 40˚C Humidity : 90% or less
For CE
Supply voltage Single phase 220V / 230V / 240V
Frequency 50 Hz / 60 Hz
Electric power 600VA
Operating environment Temperature : 0 to 40˚C Humidity : 90% or less
For JUS
Supply voltage Single phase 100V / 110V / 120V 3-phase 200V / 220V / 240V
Frequency 50 Hz / 60 Hz
Electric power 600VA
Operating environment 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
Standard scallop
Crescent
Scallop (right)
scallop
Equal-width scallop
Equal-width scallop
Stitch pat-
tern
Number of stitches
for pattern
1
2
4
6
24
12
Max.zigzag
width
____
Remarks
Standard scallop
Crescent
Scallop (left)
Blind stitch (right)
Blind stitch (left)
Custom pattern
T stitch (left)
T stitch (right)
scallop
Equal-width scallop
Equal-width scallop
24
10
12
a
2 + a
a
—— 500
3
Pattern 1
Pattern 2 (fagoting)
Pattern 3
Pattern 4
6
– 3 –
– 4 –

3-1. Initial value of the stitch pattern and the table

1 2 3 4 5 6 7 8 9 10 11 12 13
Zigzag width
Normal feed amount
Reverse feed
amount
Number of stitches
Related input
Straight stitch
2-step zigzag
stitch
4-step zigzag
stitch
3-step zigzag
stitch
Scallop 24
stitches
Standard scallop
Crescent scallop
Equal-width scallop
Scallop 12
stitches
Equal-width scallop
—— 4.0 8.0 6.0 8.0 8.0 3.0 —— 3.0 6.0 6.0 6.0 6.0
2.0 1.5 1.0 1.0 0.5 0.8 1.5 —— 2.5 2.5 1.6 2.1 2.0
0.0 0.0 0.0 0.0 0.0 0.0 0.0 —— 0.0 0.0 - 2.0 2.4 - 2.0
—— —— —— —— —— —— 4 —— —— —— —— —— ——
P. 31, 54,
55
P. 32, 54,
55
P. 32, 54,
55
P. 32, 54,
55
P. 32, 33,
56, 57, 58,
101, 102
P. 32, 33,
56, 57, 58,
101, 102
Related mechanical adjustment
Remarks
P. 128 P. 128 P. 127
Blind stitch
a
Custom pattern
T stitch Pattern 1
Pattern 2
(Fagoting)
Pattern 3 Pattern 4
(Left)
———
a
(Right)
P. 34, 59 P. 45, 60,
80, 81, 82,
83, 98, 99,
101, 102
(Left)
(Right)
P. 35, 36,
37, 38, 61,
62, 63
P. 37, 38,
64, 65
P. 39, 40,
65, 66, 67
P. 41, 42,
67, 68
P. 43, 44,
69, 70
There are cas­es where the stitch shapes are not stabilized in case of some patterns which frequently repeat normal and reverse feed stitching.
Use the ma­chine at the sewing speed of approxi­mately 2,000 sti/min.
– 5 –
– 6 –

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, ger 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
2
8
3
7
1
1
A
4
5
B
1
19.5 mm
3
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 rubber-based adhesive. Then place under cover
on the xed seats.
4
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
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 t the machine head to table rubber hinge 8
before placing the machine head on cushions 3 on the four corners.
6
4
1
5) Attach head support rod 6 to the machine table.

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 conve-
mm
220
2
3
* In case of the machine with AK device, knee lifter
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 strong-
ly drawn out. Slightly move the needle
bar to the right or left and slowly draw
out the needle bar stopper.
nient place. For the reference dimension, the posi-
tion is 220 mm from the bottom face of table.
pad 1 is optional. (Part No. 22934251)
1

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 up to 15 mm using knee lifter adjust screw ❶
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
– 7 –
– 8 –

4-5. Installing the electrical box

5
1
6
7
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 sup-
plied with the machine, and using bolt having hex-
agonal 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 x 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 x green/yellow cord to 5, brown cord to
and sky blue cord to 3 with screws.
2
3) Connecting the power cable supplied as accessories
In case of 3-phase power cable
2
6
¡
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 x green/yellow cord to 9 and other
5
4
3
8
7
cords to 6 and 7 with screws. 8 is not used.
4) Installing the power switch cover
Securely tighten screw 1 located on the side of
the power switch.

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

1) Install operation panel 1 on the machine head
1
2
3
3
3
using screws 3 which have been assembled to panel installing bracket 2.
1. Do not disassemble the operation
2. Clamp the cord coming from the
panel to prevent it from breakage.
panel and that of the machine head
with the clip band supplied as ac-
cessories.

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 fixing the rear cover of
the electrical box.
(Caution) Do not touch other screws.
When opening the rear cover, pressing it with your
hands, slowly open it by approximately 70˚ until it
Slowly
E
stops as illustrated.
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)
j
b
a
e
f
c
d
Remove the locks of cord clamps a, b, c, d, e, f and j.
How to remove the cord clamp
1
Lightly pressing
1
Pull down the clamp.
2
The clamp goes up.
3
3
1
2
* See P.14 for how to lock the cord clamp.
– 9 –
– 10 –

(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
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 “b” as illustrated and tighten it with
screw at the position 2 in the illustration.
Connect cords in the following order.
2
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
B
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 “a”, “c” and “d”, insert it into
7
a
d
c
8
connector CN34 8, and lock it.
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
9
a
c
!0
and c.
into connector CN31
through cord clamps a
!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
j
!1
!2
through cord clamp “j”, and insert it into connec-
tor CN30 !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 “a”, “c”, “d” and “g”, and insert it into con-
a
c
d
!3
!4
g
nector CN53 !4.
Close cord clamps “a”, “c” and “d”.
!7
!5
12) Insert white connector 6P cords !5 coming from
the machine head inside the electrical box through
front cover through hole B, pass it through cord
j
clamps “e” and “j”, and insert it into connector
CN54 !6.
e
!6
13)-1 Insert white connector 10P cord connector 2P cord
coming from the machine
!7
and blue
!9
head inside the electrical box through front cover through hole B, pass them through cord
!8
clamps “e”, “f” and “j”, and insert the white 10P into connector CN51 @0 and the blue 2P into CN46 !8.
@0
!9
– 11 –
– 12 –
!9
13)-2 Insert white connector 10P cord !9 coming from
the machine head to the rear of the connector
as shown in the gure.
@1
14) Insert black square connector 8P cord @1 com-
ing from the machine head inside the electrical
box through front cover through hole B, pass
it through cord clamps “e”, “f”, “h” and “j”, and
h
@2
insert the black square 10P into connector CN72
.
@2
15) Insert black connector 4P cord @3 coming from the
machine head inside the electrical box through
front cover through hole B, pass it through cord
@3
@4
h
clamps “e”, “f”, “h” and “j”, and insert the black 4P
into connector CN73 @4.
16) Close cord clamps “e”, “f” and “j”.
j
e
f
@6
f
@7
@8
@5
When the Auto-lifter (AK121) is used :
j
e
j
e
17) Insert white connector 2P cord @5 coming from
the machine head inside the electrical box
through front cover through hole B, pass it
through cord clamps “e”, “f” and “j”, and insert it
into connector CN40 @6.
Change the setting of function setting No. 23
from “0” to “1” after completing all set-up proce-
dure. For the details, see p.110 and p.113.
When the bird’s nest prevention device is used (CB type)
18) Insert white small connector 6P cord @7 com-
ing from the machine head inside the electrical
box through front cover through hole B, pass it
through cord clamps “e” and “j”, and insert it into
connector CN52 @8.
   
#0
#1
#2
When foot pedal for standing work (PK70 or 71)
a
c
@9
#3
is used :
19) Insert black connector 12P cord @9 inside the
electrical box through front cover through hole
B coming from the foot pedal for standing work,
pass it through cord clamps “a” and “c”, and
insert it into connector CN32 #0.
20) Connect white connector 2P of cord #1 sup-
plied as accessories to which red connector 2P
and white connector 2P are attached to white
connector 2P #2 of under cover of the machine
head.
Fix omega lock #3 supplied as accessories with
the neighboring cords and cord #1 as shown in
the gure.
#1
#4
21) Insert red connector 2P side of cord #1 supplied
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 #4.
– 13 –
– 14 –
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
[For CE territory]
4
3
Clamp
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.
22) Install core clamp #5 supplied as accessories at
the position as shown in the gure.
#5

4-9. Attaching the connecting rod

3
2
1
B
A
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.

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
connecting rod
2
, and adjust the length of
4
.

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
to x the thread stand.
1
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)
(mm)
106 107
233
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.
75
291
34
– 15 –
– 16 –
2
1
9
9
3
2) Fix solenoid valve (asm.) 1 with wood screws 2
supplied with the sewing machine as accessories.
4
3) Fix regulator (total asm.) 3 with wood screw 4
supplied with the sewing machine as accessories.
4) Connect ø6 and ø8 hoses attached to regulator
(total asm.) 3 to the respective solenoid valves.
5) Insert dust bag 5 into the top end of hose 9 for
dust bag and x it with band 6 supplied with the
sewing machine as accessories.
φ
φ
6
5
6
5
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
!0
4
nest prevention device is used, p. 13”.)
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.
!1
8) Fix the solenoid valve and the air hose on the table with staple 8 supplied as accessories.
8
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.
7
8
!0
!1
!2
9) Connect the air pipe !2 and set the air pressure to
0.6 MPa.
• When air pressure is used under the specied value, clamp trouble will be caused.

4-13. Lubrication

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.
1
2
3
2
Lower engraved marker line
4
Upper engraved marker line
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.
• 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 sti/ min for the purpose of break-in.
• For the oil for hook lubrication, purchase JUKI New Defrix Oil No. 1 (Part No. : MDFRX1600C0).
• For oiling, perform with oiler (B19210120A0) 4 supplied as accessories. Be careful that dust such as thread waste or the like is not oiled when oiling.
– 17 –

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 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 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 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 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.
One stitch only becomes soft start (approximately 200 sti/min) by pedal operation immediately after turning ON the power.
– 18 –

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.
B
A
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.
2) Loosen the needle clamp screw 2. Hold the nee­dle 1 so 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.
q

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 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 gure 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 auto-
matically stop as soon as the winding is nished.
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.
– 19 –
– 20 –
(Threading)
1
w
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
w
r
• 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
w
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 that
2
in the state that the thread between bobbin and thread tension disk 2 is tense.
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.
q
e
w
q
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
1
2
3
4
6
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.

5-6. Adjusting the stitch length

1)
Adjustment of the stitch length is performed with the operation panel. For the setting procedure of the respective sewing patterns, refer to “6-5. Setting the sewing pattern”.
Normal feed : Press +/– keys of to input.
Reverse feed : Press +/– keys of to input.
2) Numerical value of the operation panel is indicated in mm.
1
There may be the cases where the feed amount of the operation panel and the actual sewing pitch are differ­ent from each other in case of the use in the state other than the standard delivery or material used. Compen­sate the pitch in accordance with the sewing product.
3) When performing the reverse feed stitching, press down reverse feed control lever 1. The sewing machine performs reverse feed stitching as long as you keep the lever held pressed. The reverse feed control lever will return to its home position and the sewing machine will run in the nor­mal stitching direction when you release the reverse feed control lever.
Example) In case of normal feed : the sewing range becomes normal feed +4 to –3. The maximum amount
of reverse feed becomes –3 when reverse feed control lever 1 is pressed. Besides, it is possible to adjust the stitch length of normal/re­verse feed up to 5 mm at the maximum by inputting.
+4 and reverse feed :
Turn the thread once.
–3,

5-7. Adjusting the condensation stitching

Condensation stitching means that feed pitch amount is reduced and tie stitching is performed by operating the reverse feed control lever at the start or end of sewing.
1) Adjustment of the stitch length is performed with the operation panel.
Reverse feed : Press +/– keys of to input. Tie stitching can be per-
formed by inputting the reverse feed amount to “0”.
2) Note that the tie stitching value is mere reference. Adjust the condensa-
tion stitching while actually observing the nished seam.
3) Numerical value of the operation panel is indicated in mm.
It is possible for the gauge delivered (feed dog part No. : 40018430) to adjust up to 5 mm of normal/reverse feed at the maximum. There is a possibility that material is apt to fall in case of the process where the feed amount is small. Use the gauges such as feed dog and the like in accordance with the process.
– 21 –
– 22 –

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
Switch Description
Re-sewing switch This switch is used to continue sewing from the step on the
1
Teaching switch This is the switch to set the setting of the number of stitches
2
Needle up/down compen­sating switch
3
Screen changeover switch
4
With/without reverse feed stitch at sewing start switch
5
way after replacing bobbin thread when bobbin thread has run out during program stitching step.
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
❻
Edge sensor switch
❼
One-shot automatic sewing
switch
❽
With/without automatic
thread trimmer switch
❾
Thread trimming prohibiting
switch
󱢳
Backlight switch
󱢴
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 automat-
ically 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
󱢵
Information switch
󱢶
Plus switch
󱢷
Minus switch
󱢸
Counter/speed changeover
󱢹
switch
General-purpose switch
󱢺
Power display lamp This lamp lights up when the power switch is turned ON.
󱢻
This is the switch to make the value of bobbin thread count-
er 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.
– 23 –
– 24 –

6-2. Before setting the pattern

WARNING :
• When using presser foot, throat plate and feed dog other than those delivered as standard, needle may come in contact with throat plate and breaks, or feed dog may come in contact with throat plate in case of some set values. Be sure to perform the regulation of limitation values of 1, 3 and 4 in accordance with the gauge used. The regulation at the time of delivery is as follows :
Max. zigzag width : 8 mm Max. feed amount : 5 mm
• When replacing the gauge, provide a clearance of 0.6 mm or more between needle, and presser foot and throat plate, and between throat plate and feed dog.

(1) Limitation of the max. zigzag width

Max. zigzag width limitation value, reference of stitch base line, normal feed amount limitation
1 2 3 4
• 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
value and reverse feed amount limitation value 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. reverse feed amount limitation value
3
: Max. normal feed amount limitation value
4
Display of max. zigzag width limitation value, reference of stitch base line, normal feed amount limitation value and reverse feed amount limitation value can be performed with ON/OFF.
0.6
0.6
0.6
Changeover of limiting procedure of max. zigzag width limitation value
1) Press switch 1.
q
2) Press switch 2.
w
e
3) Figure on the left side is
the zigzag width symmet-
rical in the center mode.
Every time switch 3 is
pressed, specifying left/ right positions and zigzag width symmetrical in the center can be changed
e
over alternately.
⇔
(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 sym-
metrical in the center or limitation of left/right posi-
tions 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
–4.0 +4.0
(A) In case of zigzag width symmetrical in the center
4
4
M a x . z i g z ag width limitation value
8.0
1
M a x . z i g za g 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 pre-
vious one.
(B) In case of specifying left/right positions
6
5
6
5
1
Change of left side posi-
tion 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 posi-
tion 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 pre-
vious one.
– 25 –
– 26 –

(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
Reference of center
stitch base line
Reference of right
stitch base line
How to set
0.0 0.0
2
3
0.0
1) Press switch 1.
1
2) Press switch 2.
Reference of left
stitch base line
3
Reference of center
stitch base line
1
Reference of right
stitch base line
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.
4) Press switch 1 and the screen returns to the pre­vious one.

(3) Setting the feed amount

• Max. possible setting range in the normal direction and max. possible setting range in the reverse direc­tion can be set in accordance with the gauge used.
Setting procedure
2
1
Change in the reverse direction
1) Press +/– of switch 1 to
set the limitation value in
the reverse direction. In case of the example, the feed amount is –3.6.
2
1
Level of the standard delivery of key lock is “1”. To perform all settings, it is necessary to set the
key lock to level “0”. For the details, see p.102.
3
Change in the normal direction
2) Press +/– of switch 2 to
set the limitation value in
the normal direction.
In case of the example, the feed amount is +4.8.
3) When switch 3 is pressed,
the screen returns to the
previous one.
– 27 –
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