JUKI LZ-2280A Series User manual

LZ-2280A Series
INSTRUCTION MANUAL

CONTENTS
1. SPECIFICATIONS......................................................................................................... 1
2. INSTALLATION............................................................................................................. 4
2-1. Installation of the sewing machine...............................................................................................4
2-2. Attaching the belt cover ................................................................................................................4
2-3. Inserting the needle .......................................................................................................................5
2-4. Installing the control panel ........................................................................................................... 6
3. PREPARATION OF THE SEWING MACHINE ............................................................. 6
3-1. Lubrication......................................................................................................................................6
3-2. Adjusting the amount of oil in the hook ......................................................................................7
3-3. Adjusting the amount of oil (oil splashes)................................................................................... 8
3-4. Winding the bobbin thread............................................................................................................9
3-5. Inserting the bobbin case and the bobbin................................................................................. 10
3-6. Threading the machine head ...................................................................................................... 11
3-7. Adjusting the pedal...................................................................................................................... 11
4. ADJUSTING THE SEWING MACHINE ...................................................................... 12
4-1. Adjusting the thread tension ......................................................................................................12
4-2. Adjusting the zigzag width..........................................................................................................13
4-3. Adjusting the pressure of the presser foot ............................................................................... 14
4-4. Adjusting the height of the presser bar .....................................................................................14
4-5. Adjusting the micro-lifting mechanism of the presser foot ..................................................... 14
4-6. Adjusting the stitch length..........................................................................................................15
4-7. Adjusting the denser stitching ...................................................................................................15
4-8. Height and inclination of the feed dog....................................................................................... 16
4-9. Attaching/removing the hook .....................................................................................................16
4-10. Adjusting height of the needle bar ............................................................................................. 17
4-11. Adjusting the needle-to-hook timing and the needle guard..................................................... 17
4-12. Adjusting the stop position of the needle..................................................................................18
4-13. Adjusting the thread trimmer...................................................................................................... 19
4-14. Needle thread feeding device ..................................................................................................... 20
4-15. Position of the wiper.................................................................................................................... 20
5. OPERATION OF THE SEWING MACHINE................................................................ 21
5-1. How to operate the pedal (In the case of the direct-drive type sewing machine).................. 21
5-2. One-touch type reverse feed switch .......................................................................................... 21
5-3. Changing over the needle-throwing method............................................................................. 22
5-4. LED light ....................................................................................................................................... 22
6. OPTIONAL .................................................................................................................. 23
6-1. Pedal-operated reverse feed device (RF-1) ............................................................................... 23
6-2. Joining foot for the lockstitch presser foot............................................................................... 23
6-3. Auxiliary thread take-up kit .........................................................................................................23
7. MOTOR PULLEY AND BELT ..................................................................................... 24
8. TROUBLES AND CORRECTIVE MEASURES .......................................................... 25

– 1 –
Model LZ-2280A * LZ-2284A * LZ-2287A
Type of zigzag
Standard zigzag Selectable between standard
zigzag stitching and 3-step
zigzag stitching
Selectable between
3-step zigzag stitching
and 24-stitch standard
scallop zigzag stitching
Motor-drive
specication
V-belt V-belt/
Direct
drive
Direct
drive
V-belt/
Direct
drive
V-belt
Specication
[ * section]
A (Narrow width) B (Wide width) - -7 T -
Stitch diagram or or
Max. zigzag
width (mm)
5
[4 at the time of delivery]
8 3-step zigzag : 10
[8 at the time of delivery]
Standard zigzag : 5
[5 at the time of delivery]
10
[8 at the time of delivery]
Max. feed pitch
(mm)
2.5 (Normal/reverse feed)
[2 at the time of delivery]
5 (Normal feed)
4 (Reverse feed)
2.5 (Normal/reverse feed)
[2 at the time of delivery]
2.5 (Normal/reverse feed)
[2 at the time of delivery]
Max. sewing
speed (sti/min)
5,000 5,000
(3-step zigzag : Zigzag width
= less or 8 mm)
4,000
(3-step zigzag : Zigzag width
= more than 8 mm)
5,000
(Zigzag width
= less or 8 mm)
4,000
(Zigzag width
= more than 8 mm)
Needle SCHMETZ 438SUK (Nm75) : Nm65 to 90, DP x 134 (#10) : #9 to 14
Oil JUKI CORPORATION GENUINE OIL 7
Noise
-Equivalent continuous emission sound
pressure level (LpA) at the workstation:
A-weighted value of 80 dB; (Includes KpA
= 2.5 dB); according to ISO 10821- C.6.2 -
ISO 11204 GR2 at 4,500 sti/min.
-Equivalent continuous emission sound pressure level
(LpA) at the workstation:
A-weighted value of 80 dB; (Includes KpA = 2.5 dB);
according to ISO 10821- C.6.2 - ISO 11204 GR2 at 4,400
sti/min.
-Sound power level (LWA);
A-weighted value of 84.6 dB; (Includes KWA = 2.5 dB);
according to ISO 10821- C.6.2 - ISO 3744 GR2 at 4,500
sti/min.
1. SPECIFICATIONS

– 2 –
■DRAWING OF TABLE
(1) For the V-belt type
195
480
(525)
40
(21)
15
390
100
22.5
136
(22.5)
181 0
-1 110
(244)
80
68.1±0.5
80
R20
R22.5
Z
Z
R30
R30
Y
Y
R18
R22.5
T T
R10
R10
R20
R22.5
29
50
50
90
1200
U U
W
W
C1.5～C2.5（ひんじ側のみ）
VV
R18
R22.5
40
70
200
535
25.5
10
R30
R30
R30
R30
R6
R6
50
91
500 300
(591)
28
141 139
43 86.5
21.5
21.5 84
18
75
52
9
14
R242.5
R242.5
17 55
27.5
100
195
52.5
90
R27.5
R27.5
S
S
20
360
810
R8
R8
R8
R8
R8
R8
R8
R8
40
125
X
239.7±1
（172.2）
R10
29
R10
X
80
140
137
（110） 225
225
188
140
159
66.5
476.5
112 40
54
50±1
70±1
308
C1
C1
R2
40
27
R2
R2
R30
R2
R2
6
W-W
R2
R2
R2
R2
R30
R30
R2
R2
R2
R2
14
10
U-U
17.5±0.5
X-X
22.5±0.5
Y-Y
18.5 ±0.5
Z-Z T-T
1
∅8.5
8
∅26
V-V(1:1)
21 +0.5
0
20
+0.5
0
S-S
J
A
B
C
D
E
F
H
G
I
K
L
A 4×ø3.4 on the bottom surface, depth 20 (drill a hole at the time of set-up.) B Installing position of drawer stopper (on the reverse side) C ø16 depth 30 D ø18 drilled hole E 3×ø13 drilled hole F 2×ø3.5 depth 10
G 2×ø3.5 depth 10 H 2×ø3.4 on the bottom surface, depth 10 (drill a hole at the time of set-up.) I ø35±0.5 drilled hole J JUKI logotype K 2×ø3.4 on the bottom surface, depth 20 L 2×ø3.5 depth 4
(Hinge side only)

– 3 –
50
20
X
X
Y
Y
Ｚ
Ｚ
125
310
166.5
VV
V V
144
195
480
(525)
40
(21)
15
390
100
22.5
136
(22.5)
181 0
-1
110
(244)
80
68.1±0.5
80
R20
R22.5
Z
Z
R30
R30
Y
Y
R18
R22.5
T
T
R10
R10
R20
R22.5
29
90
1200
U
U
WW
VV
R18
R22.5
40
70
535
10
R30
R30
R30
R30
R6
R6
50
91
500 300
(591)
141 139
43 86.5
21.5
21.5 84
18
75
52
9
14
R242.5
R242.5
17
55
27.5
100
195
52.5
90
R27.5
R27.5
S
S
20
360
810
R8
R8
R8
R8
R8
R8
40
125
X
239.7±1
（172.2）
R10
29
R10
X
80
140
137
188
C1.5～C2.5（ひんじ側のみ）
17.5±0.5
X-X
22.5±0.5
Y-Y
18.5 ±0.5
Z-Z T-T
1
∅8.5
8
∅26
V-V(1:1)
C1
C1
R2
40
27
R2
R2
R30
R2
R2
6
W-W
R2
R2
R2
R30
R30
R2
R2
R2
R2
14
10
U-U
21
+0.5
0
20
+0.5
0
S-S
R2
J
A
B
C
D
E
F
H
G
I
(2) For the direct-drive type
A 4×ø3.4 on the bottom surface, depth 20 (drill a hole at the time of set-up.) B Installing position of drawer stopper (on the reverse side) C ø16 depth 30 D ø18 drilled hole E 3×ø13 drilled hole
F 2×ø3.5 depth 10 G 2×ø3.5 depth 10 H 2×ø3.4 on the bottom surface, depth 10 (drill a hole at the time of set-up.) I ø40±0.5 drilled hole J JUKI logotype
(Hinge side only)

– 4 –
1) Securely attach two belt cover studs ❶to the screw holes in the machine arm.
2) Put setscrews ❸in hole Aof belt cover A ❷and section B, and x them with setscrew washers ❹.
3) Attach belt cover A ❷to the machine arm from the slanted rear side so that it covers the belt.
2-2. Attaching the belt cover
2) Attaching the oil pan
Hammer the nails ❷on the two support rubber
seats ❶of the machine head on operators' side
A of the protruding section of the table, and x
the two cushion seats ❸of the machine head on
hinging side Bwith rubber adhesive agent. Now,
put the oil pan ❹on the cushions.
3) Attaching the hinge
Fit the hinge ❶in the hole in the bed and engage
it with the rubber hinge ❷of the table. Put the
machine head down on the cushions located at
the four corners.
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) Carry the sewing machine with two persons as
shown in the gure.
2-1. Installation of the sewing machine
2. INSTALLATION
❶
❷❸
❹
AB
22.5 mm 18.5 mm
❷
❶
❶
❷
❺
❹
❸
❻
❼
❽❾
A
BC
❼

– 5 –
■In case of using a market-available needle positioner
Adjust so that the needle always stops at the position higher than the cloth to make the sewing work very
effective. In this case the needle positioner can be used.
Install the needle positioner in the manner as described below.
If the commercially-available needle positioner is used, a separately-available exclusive part should
be purchased.
•Synchronizer support ❷part No. : 22535462 1 pc
•Adapter ❸part No. : 40109125 1 pc
4) Fix setscrews ❸to the screw holes in the machine arm, and washers ❺and setscrews ❻to the belt
cover supports.
5) Insert belt cover B asm. ❼from the rear of belt cover A ❷ and x it at the position where rubber section
Cof belt cover B asm. ❼lightly comes in contact with the belt cover A. At this time, attach the belt cover
B asm. at the position where the light and left sides are equal in terms of the long hole of the table with
wood screw ❽and washer ❾.
1) Install adapter ❸to the rear end section of the
main shaft.
2) Loosen four setscrews in belt cover A ❶and
temporarily tighten them.
3) Remove the setscrew in hole Aamong the four
setscrews and x synchronizer support ❷to the
belt cover stud.
Then perform nal tightening of the setscrews of
the whole belt cover.
4) Attach the synchronizer ❹of the needle position-
er as shown in the gure on the left.
❶
❸
❷
A
❹
1) Turn the handwheel by hand to raise the needle
bar to the highest point.
2) Loosen the needle clamp screw ❷. Hold the
needle ❶so that the long groove Bon the nee-
dle 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 ❷.
5) Conrm that the long groove Bon the needle
faces toward you.
2-3. 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.
❶
BA
❷

– 6 –
1) Put foamed polyurethane pad ❶in the oil pan ❷.
2) Fill the oil pan ❷with JUKI CORPORATION GEN-
UINE OIL 7 up to the level of “HIGH” mark A.
3) Add the oil as soon as the oil level comes down
to “LOW” mark Bor lower.
4) Run the sewing machine after the lubrication. As
long as the machine is lubricated normally, the oil
splash is seen through the oil sight window ❸.
(The amount of splashing oil does not depend on
the amount of oil.)
* If dust has gathered in the oil pan, remove it.
When changing the sewing machine oil, squeeze
urethane foam ❶and remove dust from it.
 1. Whenusinganewsewingmachineforthersttimeorusingthesewingmachinewhichhasnot
been used for a long time, run the sewing machine at a low speed (approximately 2,000 sti/min)
for approximately ten minutes.
2. When the machine is continuously used at a low speed (2,000 sti/min or less), make the machine
run idle at a high speed (4,000 sti/min or more) for approximately 5 minutes once a week.
3. Use clean oil and when the oil becomes dirty, replace it with clean oil as soon as possible. When
you continue to use the machine with dirty oil, the trouble will be caused.
3-1. Lubrication
3. PREPARATION OF THE SEWING MACHINE
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.
2-4. Installing the control panel
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.
In the case the sewing machine with a direct-drive
motor is used, install the control panel to the sewing
machine.
The control panel comes in four different types.
Panel Part No. Remarks
CP-18A 40088591 Simplied type
CP-180A 40088333 Multi-functional type
IT-10 40108380 Intelligent terminal
(Simplied type)
IT-100 40108876 Intelligent terminal
(Multi-functional type)
❶SM4051255SP
❷WP0501016SD
❷
❶
❸
A B❶ ❷

– 7 –
1. After the adjustment, idle the sewing machine at the sewing speed to be used for sewing about
30 seconds. Then, check the oil quantity by comparing with the sample which shows the appro-
priate oil splash (marks).
2. When adjusting the amount of oil in the hook, perform the adjustment in a way of reducing the
oil amount after somewhat increasing it.
3. The amount of oil in the hook has been adjusted at the max. sewing speed at the time of delivery.
When you always use the sewing machine at low sewing speed, there is a possibility that trouble
occurs due to the lack of amount of oil in the hook. When the sewing machine is used always at
low sewing speed, perform the adjustment of the amount of oil in the hook.
4. There is a possibility of causing oil leakage from the hook shaft section since oil does not return
to the oil tank when oil amount adjustment screw ❶is used in fully-tightened state. Do not use
the screw in fully-tightened state. In addition, when the amount of oil in the hook is not obtained
unless oil amount adjustment screw ❶is near in fully-tightened state, it is considered that hook
shaft oil wick (JUKI Part No. 11015906) is clogged or the like. Replace the hook shaft oil wick.
5. Never adjust screw ❷ofthehookoilquantityadjustingvalvesinceitisxed.
Tilt the machine head, and adjust the amount of oil in
the hook by turning the oil amount adjustment screw
❶mounted on the gear box B.
Turn the adjusting screw in the “+” direction (counter-
clockwise) to increase the amount of oil in the hook.
Turn the adjusting screw in the “–” direction (clockwise)
to decrease it.
3-2. Adjusting the amount of oil in the hook
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.
❶
❷

– 8 –
①Amountofoil(oilsplashes)conrmationpaper ② Positiontoconrmtheamountofoil(oilsplashes)
Approx. 25 mm
Approx. 70 mm
* Whencarryingouttheproceduredescribedbelowin1)and2),conrmthestatethattheneedle
thread from the thread take-up lever to the needle and the bobbin thread are removed, the presser
foot is lifted and the slide plate is removed. At this time, take extreme caution not to allow your
ngerstocomeincontactwiththehook.
1) If the machine has not been sufciently warmed up for operation, make the machine run idle for approxi-
mately three minutes. (Moderate intermittent operation)
2) Place the amount of oil (oil spots) conrmation paper under the hook immediately after the machine stops
running.
3) Conrm the height of the oil surface in the oil reservoir is within the range between “HIGH” and “LOW”.
4) Conrmation of the amount of oil should be completed in ve seconds. (Check the period of time with a
watch.)
WARNING :
Be extremely careful about the operation of the machine since the amount of oil has to be checked
by turning the hook at a high speed.
3-3. Adjusting the amount of oil (oil splashes)
(1)Conrmationoftheamountofoilinthehook
1) The amount of oil shown in the samples on the left should be nely adjusted in accordance with sewing
processes.
Be careful not to excessively increase/decrease the amount of oil in the hook. (If the amount of oil is too
small, the hook will be seized (the hook will be hot). If the amount of oil is too much, the sewing product
may be stained with oil.)
2) Adjust the amount of oil in the hook so that the oil amount (oil splashes) should not change while checking
the oil amount three times (on the three sheets of paper).
Splashes of oil from the hook
Min. 0.5 mm
Appropriate amount of oil (large)
Appropriate amount of oil (small)
(2) Sample showing the appropriate amount of oil in the hook
Max. 1 mm
Splashes of oil from the hook
Hook
Oilsplashesconrmationpaper
Approx. 10 mm
* Use any paper available regardless of the material.