JUKI LZ-2280A Instruction Manual
LZ-2280A Series
INSTRUCTION MANUAL
CONTENTS
1. SPECIFICATIONS ......................................................................................................... 1
2. INSTALLATION
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
............................................................................................................. 4
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. SPECIFICATIONS
Model LZ-2280A * LZ-2284A * LZ-2287A
Type of zigzag
Motor-drive
specication
Specication
[ * section]
Standard zigzag Selectable between standard
zigzag stitching and 3-step
zigzag stitching
V-belt V-belt/
Direct
drive
Direct
drive
V-belt/
Direct
drive
A (Narrow width) B (Wide width) - -7 T -
Selectable between
3-step zigzag stitching
and 24-stitch standard
scallop zigzag stitching
V-belt
Stitch diagram
Max. zigzag
width (mm)
Max. feed pitch
(mm)
5
[4 at the time of delivery]
2.5 (Normal/reverse feed)
[2 at the time of delivery]
8 3-step zigzag : 10
5 (Normal feed)
4 (Reverse feed)
[8 at the time of delivery]
Standard zigzag : 5
[5 at the time of delivery]
2.5 (Normal/reverse feed)
[2 at the time of delivery]
or
[8 at the time of delivery]
2.5 (Normal/reverse feed)
[2 at the time of delivery]
5,000 5,000
(3-step zigzag : Zigzag width
Max. sewing
speed (sti/min)
= less or 8 mm)
4,000
(3-step zigzag : Zigzag width
= more than 8 mm)
= 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 K
= 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:
pA
A-weighted value of 80 dB; (Includes K
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.
or
10
5,000
(Zigzag width
= less or 8 mm)
4,000
(Zigzag width
pA
= 2.5 dB);
– 1 –
■DRAWING OF TABLE
(1) For the V-belt type
0
+0.5
S-S
20
R2
U-U
R2
（110）
70
50
R30
18
50
90
75
225
54
476.5
159
810
188
D
50±1
25.5
28
R8
137
R242.5
L
I
C
140
V
140
V
66.5
X
S
R8
70±1
R10
T
R10
E
R30
R2
535
225
360
141
43
21.5
W
R8
84
9
14
F
R8
R20
R22.5
R10
80
29
T
29
R10
80
68.1±0.5
239.7±1
X
0
+0.5
21
R30
R2
200
R8
R18
R22.5
139
55
27.5
21.5
R6
R8
R27.5
R8
86.5
R8
52
R242.5
R27.5
10
R2
R2
R2
14
40
17
40
R30
40
100
195
125
52.5
195
S
90
R2
R2
C1
H
G
2×ø3.5 depth 10
2×ø3.4 on the bottom surface, depth 10 (drill a hole at the time of set-up.)
ø35±0.5 drilled hole
JUKI logotype
2×ø3.4 on the bottom surface, depth 20
2×ø3.5 depth 4
480
(Hinge side only)
C1.5～C2.5（ひんじ側のみ）
G
H
I
J
K
L
1200
T-T
（172.2）
Y
308
U
K
112
40
(244)
A
R22.5
Z
R20
Z
R30
(22.5)
80
136
-1
181
0
R22.5
Y
R18
R30
22.5
110
15
C1
R2
U
Z-Z
27
R30
R2
Y-Y
500 300
(591)
(525)
X-X
1
18.5
±0.5
22.5±0.5
17.5±0.5
8
B
20
50
100
R30
W
390
J
R6
10
91
W-W
40
(21)
R2
R30
∅26
R2
V-V(1:1)
6
∅8.5
4×ø3.4 on the bottom surface, depth 20 (drill a hole at the time of set-up.)
Installing position of drawer stopper (on the reverse side)
ø16 depth 30
ø18 drilled hole
3×ø13 drilled hole
2×ø3.5 depth 10
A
B
C
D
E
F
– 2 –
(2) For the direct-drive type
0
+0.5
S-S
20
R2
U-U
R2
70
D
188
144
R242.5
50
R30
20
18
90
75
166.5
R30
R2
535
360
141
43
21.5
WW
84
F
9
14
E
R8
S
R8
V
R20
I
V
Ｚ
137
C
310
125
V
810
V
R10
X
140
T
V V
R10
X
R22.5
R10
Ｚ
80
29
T
29
R10
80
68.1±0.5
X
239.7±1
X
0
+0.5
21
R30
R2
86.5
R8
52
R242.5
139
55
27.5
21.5
R6
R8
R8
R27.5
Y
R18
Y
R22.5
R8
R27.5
10
R2
R2
R2
14
40
17
40
R30
40
100
195
125
52.5
195
S
90
R2
R2
C1
H
G
2×ø3.5 depth 10
2×ø3.5 depth 10
2×ø3.4 on the bottom surface, depth 10 (drill a hole at the time of set-up.)
ø40±0.5 drilled hole
480
(Hinge side only)
C1.5～C2.5（ひんじ側のみ）
F
G
JUKI logotype
H
I
J
1200
（172.2）
Y
R22.5
Z
U
R20
Z
(22.5)
(244)
80
R30
136
-1
181
0
A
R22.5
Y
R18
R30
22.5
110
C1
U
500 300
R2
27
(591)
(525)
T-T
18.5
±0.5
Z-Z
R30
R2
22.5±0.5
Y-Y
17.5±0.5
X-X
15
8
1
B
20
100
R30
390
J
50
40
R6
(21)
R30
10
W-W
91
R2
∅26
R2
6
V-V(1:1)
∅8.5
4×ø3.4 on the bottom surface, depth 20 (drill a hole at the time of set-up.)
Installing position of drawer stopper (on the reverse side)
ø16 depth 30
ø18 drilled hole
3×ø13 drilled hole
A
B
C
D
E
– 3 –
2. INSTALLATION
2-1. Installation of the sewing machine
22.5 mm
❶
❹
18.5 mm
1) Carry the sewing machine with two persons as
shown in the gure.
❷
❶
2-2. Attaching the belt cover
❷
A
B
❸
2) Attaching the oil pan
Hammer the nails ❷ on the two support rubber
seats ❶ of the machine head on operators' side
A of the protruding section of the table, and x
the two cushion seats ❸ of the machine head on
hinging side B with rubber adhesive agent. Now,
put the oil pan ❹ on the cushions.
3) Attaching the hinge
Fit the hinge ❶ in the hole in the bed and engage
it with the rubber hinge ❷ of 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.
❶
❾
❸
❼
❻
❷
A
❹
B
❼
C
❽
❺
1) Securely attach two belt cover studs ❶ to the screw holes in the machine arm.
2) Put setscrews ❸ in hole A of belt cover A ❷ and section B, and x them with setscrew washers ❹.
3) Attach belt cover A ❷ to the machine arm from the slanted rear side so that it covers the belt.
– 4 –
4) Fix setscrews ❸ to the screw holes in the machine arm, and washers ❺ and setscrews ❻ to the belt
cover supports.
5) Insert belt cover B asm. ❼ from the rear of belt cover A ❷ and x it at the position where rubber section
C of belt cover B asm. ❼ lightly 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 ❽ and washer ❾.
■ 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.
1) Install adapter ❸ to the rear end section of the
❸
❶
❹
main shaft.
2) Loosen four setscrews in belt cover A ❶ and
temporarily tighten them.
3) Remove the setscrew in hole A among the four
setscrews and x synchronizer support ❷ to the
belt cover stud.
Then perform nal tightening of the setscrews of
the whole belt cover.
4) Attach the synchronizer ❹ of the needle position-
❷
er as shown in the gure on the left.
A
If the commercially-available needle positioner is used, a separately-available exclusive part should
be purchased.
• Synchronizer support ❷ part No. : 22535462 1 pc
• Adapter ❸ part No. : 40109125 1 pc
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
❷
B
A
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 ❶ 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 ❷.
5) Conrm that the long groove B on the needle
faces toward you.
– 5 –
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
❶
❷
❶ SM4051255SP
❷ WP0501016SD
machine.
The control panel comes in four different types.
Panel Part No. Remarks
CP-18A 40088591 Simplied type
CP-180A 40088333 Multi-functional type
IT-10 40108380
IT-100 40108876
Intelligent terminal
(Simplied type)
Intelligent terminal
(Multi-functional type)
3. PREPARATION OF THE SEWING MACHINE
3-1. Lubrication
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
1) Put foamed polyurethane pad ❶ in the oil pan ❷.
2) Fill the oil pan ❷ with JUKI CORPORATION GENUINE 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 B or 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.)
❷
A B❶
❸
* If dust has gathered in the oil pan, remove it.
When changing the sewing machine oil, squeeze
urethane foam ❶ and remove dust from it.
1. Whenusinganewsewingmachineforthersttimeorusingthesewingmachinewhichhasnot
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.
– 6 –
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.
Tilt the machine head, and adjust the amount of oil in
the hook by turning the oil amount adjustment screw
❶ mounted on the gear box B.
Turn the adjusting screw in the “+” direction (counter-
clockwise) to increase the amount of oil in the hook.
❶
❷
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 ❶ is 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 ❶ is 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 ❷ofthehookoilquantityadjustingvalvesinceitisxed.
Turn the adjusting screw in the “–” direction (clockwise)
to decrease it.
– 7 –
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