JUKI LH-3500 Series User manual

ENGLISH
LH-3500 Series
INSTRUCTION MANUAL

i
CONTENTS
1. SPECIFICATIONS............................................................................................................ 1
2. NAME OF EACH COMPONENT ..................................................................................... 3
3. INSTALLATION................................................................................................................ 4
3-1. Caution at the time of set-up ................................................................................................................................ 4
3-2. Installation of the sewing machine ...................................................................................................................... 5
3-3. Adjusting the height of the knee lifter ................................................................................................................. 7
3-4. Installation of thread stand................................................................................................................................... 7
4. PREPARATION OF THE SEWING MACHINE ................................................................8
4-1. Method of lubrication ............................................................................................................................................ 8
4-2. Lubrication to the oil tank..................................................................................................................................... 9
4-3. Draining of oil from the oil tank ......................................................................................................................... 10
4-4. Adjusting the amount of oil in the hook ............................................................................................................ 10
4-5. Oil in the feed box ............................................................................................................................................... 12
4-6. Applying grease................................................................................................................................................... 13
4-7. Installing the belt cover and the bobbin thread winder ................................................................................... 16
4-8. Attaching the needles ......................................................................................................................................... 16
4-9. How to take out the bobbin case ....................................................................................................................... 17
4-10. Insertlng a bobbin in a bobbin case ................................................................................................................ 17
4-11. Threading the machine head ............................................................................................................................ 18
4-12. Thread tension................................................................................................................................................... 19
4-13. Thread take-up spring....................................................................................................................................... 20
4-14. Adjusting the stitch length ............................................................................................................................... 21
4-15. Needle-to-hook relation .................................................................................................................................... 21
4-16. Adjusting the needle stop position.................................................................................................................. 23
4-17. Pedal pressure and pedal stroke ..................................................................................................................... 24
4-18. Adjustment of the pedal.................................................................................................................................... 24
5. OPERATION OF THE SEWING MACHINE .................................................................. 25
5-1. Pedal Operation ................................................................................................................................................... 25
5-2. Hand lifter............................................................................................................................................................. 25
5-3. Adjusting the pressure of the presser foot ....................................................................................................... 26
5-4. Micro-lifter ............................................................................................................................................................ 26
5-5. Thread tension release changeover when using the knee lifter ..................................................................... 27
5-6. One-touch manual reverse feed (One-touch reverse feed type)..................................................................... 27
6. MAINTENANCE ............................................................................................................. 28
6-1. Changing procedure to bottom feed and the adjustment (for LH-3528 only)................................................ 28
6-2. Changing procedure to needle feed and the adjustment (for LH-3528 only)................................................. 29
6-3. Adjusting the hook needle guard....................................................................................................................... 30
6-4. Adjusting the inner hook guide.......................................................................................................................... 30
6-5. Adjusting the height and the inclination of the feed dog ................................................................................ 31
6-6. Replacing the gauge ........................................................................................................................................... 32
6-7. Adjusting the thread presser spring.................................................................................................................. 33
6-8. Adjusting the position of the moving knife....................................................................................................... 34
6-9. Position of the wiper ........................................................................................................................................... 35
6-10. Caution when installing the attachments........................................................................................................ 35
6-11. Replacing the bobbin thread slack preventer sprlng (For LH-3568, 3568-7, 3588, 3588-7) ........................ 36
6-12.
Stop of the needle bars and angle of corners for corners stitching (For LH-3568, 3568-7, 3588, 3588-7).... 36
7. STITCH-TO-ANGLE TABLE BY GAUGE (PITCH AND mm CONVERSION TABLE).. 37
8. GAUGE SETS................................................................................................................ 38
9. TROUBLES AND CORRECTIVE MEASURES ............................................................. 47
10. MOTOR PULLEY AND BELT ...................................................................................... 48

– 1 –
1. SPECIFICATIONS
Model name LH-3528 LH-3528-7
(with automatic thread trimmer)
Application For light - and medium - weight materials
S type : standard,F type : foundation, A type : light-weight materials, G type : jeans
Hook Small hook Small hook
Thread trimmer Not provided Provided
Separately
driven needle bar
mechanism
Not provided Not provided
Max. sewing speed 3,000 sti/min
Needle DP x 5 #9 to #16 (For F,A and S types), DP x 5 #16 to #22 (G type)
Gauge size 3/32" to 1-1/2" 1/8" to 1-1/4"
2.4 to 38.1 mm 3.2 to 31.8 mm
Lift of presser foot 13 mm by knee lifter, 7 mm by hand lifter lever
Lubrication JUKI NEW DEFRIX OIL No. 1 or JUKI MACHINE OIL #7
Noise
Workplace-related noise at sewing speed
n = 2,750 min–1 : LpA ≦84 dB(A)
Noise measurement according to DIN 45635-48-A-1.
Model name LH-3568
(with incorporating corner stitching)
LH-3568-7
(with automatic thread trimmer incorporating
corner stitching)
Application For light- and medium-weight materials
S type : standard, G type : jeans
Hook Small hook Small hook
Thread trimmer Not provided Provided
Separately
driven needle bar
mechanism
Provided Provided
Max. sewing speed 3,000 sti/min
Needle DP x 5 #9 to #16 (S type), DP x 5 #16 to #22 (G type)
Gauge size 1/8" to 3/4"
3.2 to 19.1 mm
Lift of presser foot 13 mm by knee lifter, 7 mm by hand lifter lever
Lubrication JUKI NEW DEFRIX OIL No. 1 or JUKI MACHINE OIL #7
Noise
Workplace-related noise at sewing speed
n = 3,000 min–1 : LpA ≦83.5 dB(A)
Noise measurement according to DIN 45635-48-A-1.

– 2 –
Model name LH-3578 LH-3578-7
(with automatic thread trimmer)
Application For medium - weight materials
G type : jeans
Hook Large hook Large hook
Thread trimmer Not provided Provided
Separately
driven needle bar
mechanism
Not provided Not provided
Max. sewing speed 3,000 sti/min
Needle DP x 5 #16 to #22 (G type)
Gauge size 3/16" to 1-1/12" 3/16" to 3/8"
4.8 to 38.1 mm 4.8 to 9.5 mm
Lift of presser foot 13 mm by knee lifter, 7 mm by hand lifter lever
Lubrication JUKI NEW DEFRIX OIL No. 1 or JUKI MACHINE OIL #7
Noise
Declaration
- Equivalent continuous emission sound pressure level (LpA) at the workstation :
A-weighted value of 86.5 dB ; (Includes KpA = 2.5 dB) ; according to ISO 10821- C.6.2
-ISO 11204 GR2 at 3,000 sti/min.
- Sound power level (LWA) :
A-weighted value of 91.5 dB ; (Includes KpA = 2.5 dB) ; according to ISO 10821- C.6.2
-ISO 11204 GR2 at 3,000 sti/min.
Model name LH-3588
(with incorporating corner stitching)
LH-3588-7
(with automatic thread trimmer incorporating
corner stitching)
Application For medium - weight materials
G type : jeans
Hook Large hook Large hook
Thread trimmer Not provided Provided
Separately
driven needle bar
mechanism
Provided Provided
Max. sewing speed 3,000 sti/min
Needle DP x 5 #16 to #22 (G type)
Gauge size 3/16" to 3/8"
4.8 to 9.5 mm
Lift of presser foot 13 mm by knee lifter, 7 mm by hand lifter lever
Lubrication JUKI NEW DEFRIX OIL No. 1 or JUKI MACHINE OIL #7
Noise
Declaration
- Equivalent continuous emission sound pressure level (LpA) at the workstation :
A-weighted value of 85 dB ; (Includes KpA = 2.5 dBA) ; according to ISO 10821- C.6.2
-ISO 11204 GR2 at 3,000 sti/min.
- Sound power level (LWA) :
A-weighted value of 89.5 dB ; (Includes KpA = 2.5 dBA) ; according to ISO 10821- C.6.2
-ISO 11204 GR2 at 3,000 sti/min.

– 3 –
2. NAME OF EACH COMPONENT
1Separately driven needle changeover lever
(LH-3568, 3568-7, 3588, 3588-7)
2Thread take-up cover
3Finger guard
4Thread tension controller
5Control box
6Pedal
7Knee padKnee pad
!0
2
3
6
5
8
7
4
9
!2
!4
!3
!5
!1
1
8Power switch
9Reverse feed switchReverse feed switch
!0 Operation panel
!1 Bobbin winder
!2 Thread stand
!3 Oil supply opening
!4 Reverse feed control lever
!5 Hand lifter lever