Juki LH-4128 Bruksanvisning

Juki Symaskin LH-4128

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ENGLISH

LH-4128, 4128-7

LH-4168-7, 4188-7

INSTRUCTION MANUAL

CONTENTS

1. SPECIFICATIONS ........................................................................................................... 1

2. NAME OF EACH COMPONENT .................................................................................... 2

3. INSTALLATION ............................................................................................................... 3

3-1. Installing the bottom cover .................................................................................................................................. 3

3-2. Opening and closing of the control box (SC-910) ............................................................................................. 4

3-3. Adjusting the height of the knee lifter ................................................................................................................ 5

3-4. Installation of thread stand .................................................................................................................................. 5

3-5. Caution when installing the panel ...................................................................................................................... 5

3-6. Connecting the cord ............................................................................................................................................. 6

3-7. Managing the cord ................................................................................................................................................ 8

3-8. Adjusting the knee lifter detection seat (asm.) ................................................................................................ 10

4. PREPARATION OF THE SEWING MACHINE ............................................................. 11

4-1. Lubrication .......................................................................................................................................................... 11

4-2. Cleaning the lter ............................................................................................................................................... 12

4-3. Adjusting the amount of oil in the hook .......................................................................................................... 13

4-4. Attaching the needles ........................................................................................................................................ 13

4-5. How to take out the bobbin case ...................................................................................................................... 14

4-6. Inserting a bobbin in a bobbin case ................................................................................................................. 14

4-7. Threading the machine head ............................................................................................................................. 15

4-8. Thread tension .................................................................................................................................................... 16

4-9. Thread take-up spring ........................................................................................................................................ 16

4-10. Adjusting the stitch length .............................................................................................................................. 17

4-11. Winding the bobbin thread .............................................................................................................................. 18

4-12. Adjusting the needle stop position ................................................................................................................. 19

4-13. Pedal pressure and pedal stroke .................................................................................................................... 20

4-14. Adjustment of the pedal ................................................................................................................................... 20

5. OPARATION OF THE SEWING MACHINE .................................................................. 21

5-1. Pedal operation ................................................................................................................................................... 21

5-2. Hand lifter ............................................................................................................................................................ 22

5-3. Adjusting the pressure of the presser foot ...................................................................................................... 22

5-4. Thread tension release changeover when using the knee lifter .................................................................... 23

5-5. Separately driven needle changeover switch (for LH-4168-7 and 4188-7) .................................................... 24

5-6. One-touch reverse feed switch lever (for touch-back) ................................................................................... 25

6. MAINTENANCE ............................................................................................................ 25

6-1. Changing procedure to bottom feed and the adjustment (LH-4128 without thread trimmer only)............. 25

6-2. Changing procedure to needle feed (for LH-4128 only) ................................................................................. 27

6-3. Adjusting the inner hook guide ......................................................................................................................... 28

6-4. Needle-to-hook relation ..................................................................................................................................... 29

6-5. Adjusting the height and the inclination of the feed dog ............................................................................... 32

6-6. Adjusting the presser foot ................................................................................................................................. 32

6-7. Move (adjustment) of the hook shaft saddle when replacing the gauge ...................................................... 33

6-8. Adjusting the thread presser spring ................................................................................................................. 33

6-9. Adjusting the position of the moving knife ...................................................................................................... 34

6-10. Replacing the bobbin thread slack preventer spring (for LH-4168-7 and 4188-7) ...................................... 35

6-11. Adjusting the hook needle guard .................................................................................................................... 35

6-12. Stop of the needle bars and angle of corners for corners stitching (for LH-4168-7 and 4188-7) ............... 36

6-13. Caution when installing the gauge to the bed slide ...................................................................................... 36

6-14. Position of the wiper ........................................................................................................................................ 37

6-15. Replenishing grease to the specied places (for LH-4168-7 and 4188-7)

................................................... 37

6-16. Cleaning the inside of the needle bar bushing .............................................................................................. 39

STITCH-TO-ANGLE TABLE BY GAUGE (PITCH AND mm CONVERSION TABLE)

... 40

8. GAUGE SETS ............................................................................................................... 41

9. TROUBLES AND CORRECTIVE MEASURES ............................................................ 46

– 1 –

1. SPECIFICATIONS

*1 3,500 sti/min when the stitch length exceeds 4 mm.

*2 S : Standard, F : Foundation, G : Jeans

Model name LH-4128

LH-4128-7

(with automatic

thread trimmer)

LH-4168-7

(with automatic

thread trimmer

incorporating corner

stitching)

LH-4188-7

(with automatic

thread trimmer

incorporating corner

stitching)

Application For light-, medium-

and heavy-weight materials

For medium- and

heavy-weight

materials

Specication type *2S, F, G S, G G

Hook Standard hook Large hook

Thread trimmer Not provided Provided

Separately

driven needle bar

mechanism

Not provided Provided

Max. sewing speed 4,000 sti/min *13,200 sti/min

Needle DP x 5 #9 to #16 (For S type), DP x 5 #9 to #11 (For F type), DP x 5 #16 to #22 (G type)

Gauge size 1/8" to 1-1/2"

3.2 to 38.1 mm

5/32" to 1-1/4"

4 to 31.8 mm

5/32" to 1"

4 to 25.4 mm

5/32" to 1"

4 to 25.4 mm

Lift of presser foot 12 mm by knee lifter, 5.5 mm by hand lifter lever, 9 mm by knee lifter with wiper

Lubrication New Defrix Oil No. 1

Noise

• LH-4128 / 4128-7

- Equivalent continuous emission sound pressure level (LpA) at the workstation :

A-weighted value of 83.5 dB ; (Includes K

pA = 2.5 dB) ; according to ISO 10821- C.6.2 -ISO

11204 GR2 at 4000 sti/min.

- Sound power level (LWA);

A-weighted value of 88.0 dB ; (Includes K

WA = 2.5 dB) ; according to ISO 10821- C.6.2 -ISO

3744 GR2 at 4000 sti/min.

• LH-4168-7

- Equivalent continuous emission sound pressure level (LpA) at the workstation :

A-weighted value of 78.0 dB ; (Includes K

pA = 2.5 dB) ; according to ISO 10821- C.6.2 -ISO

11204 GR2 at 3200 sti/min.

• LH-4188-7

- Equivalent continuous emission sound pressure level (LpA) at the workstation :

A-weighted value of 84.5 dB ; (Includes K

pA = 2.5 dB) ; according to ISO 10821- C.6.2 -ISO

11204 GR2 at 3200 sti/min.

- Sound power level (LWA) ;

A-weighted value of 89.0 dB ; (Includes K

WA = 2.5 dB) ; according to ISO 10821- C.6.2 -ISO

3744 GR2 at 3200 sti/min.

Produktspecifikationer

Varumärke:	Juki
Kategori:	Symaskin
Modell:	LH-4128
Färg på produkten:	Blue, Grey
Inbyggd display:	Ja
Förpackningens vikt:	1200 g
Förpackningens bredd:	205 mm
Djuppackning:	280 mm
Förpackningshöjd:	75 mm
Husmaterial:	Metaal
Typ av belysning:	LED
Kraftkälla:	AC
Skärm diagonal:	4.3 "
Videoformat som stöds:	AVI
Videoinspelning:	Ja
Medföljande kablar:	AC, USB
Kompatibla minneskort:	MicroSD (TransFlash)
Antal batterier/batterier som stöds:	1
Megapixlar:	12 MP
Bildsensortyp:	CMOS
Bildsensorstorlek:	1/4 "
Optisk zoom:	55 x
vitbalans:	Handmatig
Bildformat som stöds:	JPEG
Inbyggd kamera:	Ja
Stöder Windows:	Ja
Stöder Mac-operativsystem:	Ja
Filtertyp:	Ultraviolet (UV) filter voor camera's
USB:	Ja
Kameraupplösning:	4032 x 3024 Pixels
Färgskärm:	Ja
Bordsbredd:	100 mm
Ljusstyrka kontroll:	Ja
AC-ingångsspänning:	110–220 V
Drifttemperatur (TT):	-20 - 70 °C
Batterier-ingår:	Ja
Type beeldscherm:	LCD
Batterityp:	CR2025
Exponering:	Ja
Fjärrkontrollfunktion:	Ja
Maximal förstoring:	220 x
Linsmaterial:	Glas
Typ av mikroskop:	Digitale microscoop
Minneskortplats:	Ja
Minsta förstoring:	3 x
Handinställning:	Ja
Bordsdjup:	160 mm
Groffocus:	23 mm
Spektralområde:	410 - 1100 nm