JUKI MO-2000 Series Manual de usuario

MO-2000 Series

SERVICE MANUAL

No.00

40267028

2-Needle, 2/3/4-Thread Overlock Sewing Machine

CONTENTS

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

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

1. Appearance ................................................................................................................. 2

2. Inside of the cover...................................................................................................... 3

3STANDARD ADJUSTMENT / DISASSEMBLY AND ASSEMBLY... 4

1. Removing the top cover............................................................................................. 4

2. Removing the cloth plate cover ................................................................................ 6

3. Removing the bottom plate ....................................................................................... 7

4. Removing the looper cover ....................................................................................... 7

5. Removing the side cover........................................................................................... 8

6. Removing the rear cover

Removing the front cover .......................................................................................... 9

7. Removing the looper cover guide............................................................................11

9. Installation of the throat plate ................................................................................. 12

10. Height of the needle bar......................................................................................... 14

11. Position of the feed dog......................................................................................... 16

12. Adjusting the stroke of the sub feed dog............................................................. 18

13. Height of the feed dog............................................................................................ 20

14. Feed dog timing...................................................................................................... 22

15. Position of the balance weights and the cams.................................................... 24

16. Projecting amount of the upper looper ................................................................ 26

17. Radius of the lower looper .................................................................................... 28

18. Adjustment of the loop lift ..................................................................................... 30

19. Timing between upper and lower looper.............................................................. 32

20. Installation of the needle guards .......................................................................... 34

21. Adjusting the looper thread take-up..................................................................... 36

22. Height and lateral position of the presser foot.................................................... 38

23. Presser foot height by the knee lifting lever........................................................ 40

24. Height of the presser foot by the micro lifter (only for the MO-2500)................ 42

25. Adjusting the oating of the disk of the thread tension controller ................... 44

26. Adjusting the tension of the thread tension controller....................................... 46

To avoid the risk of re, electric shock, injury to persons or damage to components,

especially keep the following:

• When disassembling, assembling or adjusting the sewing machine, remove the power plug.

• When assembling, be careful about the electrical cord being caught with other components,

damage to the covered parts of the cord or miswiring.

• When replacing the part(s), use the genuine part(s).

WARNING :

27. Position of the needle thread take-up thread guide............................................ 48

28. Tension of the belt.................................................................................................. 50

29. Adjusting the needle bar connection guide of the needle threader .................. 52

30. Adjusting the needle threader hook ..................................................................... 54

31. Adjusting the looper threader timing ................................................................... 56

32. Adjusting the pump unit ........................................................................................ 58

33. Position of the lower knife..................................................................................... 60

34. Engagement of the upper knife with the lower knife .......................................... 62

35. Adjusting the timing of the upper knife................................................................ 64

36. Adjusting the thread sliding segment .................................................................. 66

37. Adjusting the safety switch ................................................................................... 68

38. Position of the cloth plate...................................................................................... 70

4CIRCUIT DIAGRAM....................................................................... 72

5MAINTENANCE ............................................................................. 74

1. Lubrication................................................................................................................ 74

2. Grease application ................................................................................................... 74

3. Looper threader........................................................................................................ 74

6TROUBLES AND CORRECTIVE MEASURES ............................. 75

–1 –

No. Items Description

1 Model name 2-Needle, 2/3/4-Thread Overlock Sewing Machine (with

di󰀨erential feed adjusting)

2 Stitch choice 2 needles, 4 thread overlock

2 needles, 3 thread overlock

1 needle, 3 thread overlock

1 needle, 2 thread overlock

3 Sewing speed Up to 1,500 sti/min Rating 1,350±150 sti/min

4 Needle gauge Overlocking: 2.2 mm

5 Overedge width 2 needles, 4 thread: 4.5 to 7.0 mm

1 needle, 3 thread (right hand needle): 2.5 to 5.0 mm

1 needle, 3 thread (left hand needle): 4.5 to 7.0 mm

Roll hemming: 2.0 mm

Knife width 2.5 to 5.0 mm

6 Thread sliding segment The thread sliding segment is in synchronism with the lower

knife at its standard position.

The amount of travel of the thread sliding segment must be

nely adjustable with the overedge width adjustment knob.

7 Stitch length 1.0 to 4.0 mm (Standard 2.5 mm)

8Di󰀨erential feed 1：0.7 to 2

9 Needle bar stroke 29.4 mm

10 Presser foot height 5.8 mm to 6.0 mm

11 Presser foot height by the knee lifting lever 6.0 mm

12 Presser foot height by the micro lifter (*1) 2.5 mm

13 Feed dog height 1.3 mm (This side end of the sub feed dog P = 2.5 mm;

di󰀨erential feed ratio: 1:1)

14 Needle system (Japan) ORGAN needle HA×11SP # 11 (Standard) to # 14

Needle system (Overseas) SCHMETZ (130/705H 15X1H) # 80

15 Number of needles Max. 2

16 Number of threads to be used Max. 4

17 Needle threader Operated by the manual lever

18 Looper threader Automatic threading by the air pump

19 Air pump Piston pump driven by the motor

Motor: DC 12V

20 Power switch Rocker switch

21 Light LED 5V x 2

22 Motor 100V : 100 to 120W

110/120V : 100 to 120W

220 to 240V : 100 to 130W

23 Foot control No-heat method (semi-conductor control type)

24 Driving system Timing belt drive

25 Machine size 350 mm (W) × 310 mm (D) × 340 mm (H)

26 Machine weight 10 kg

1SPECIFICATIONS

* 1: Only for MO-2500 types

–2 –

Caution: Be sure to turn o󰀨 the power switch

before opening the looper cover.

2NAME OF EACH COMPONENT

1. Appearance Thread guide support

Open thread guide

■ View with looper cover open

Lower looper thread tension dial

Upper looper thread tension dial

Right needle thread tension dial

Left needle thread tension dial

Thread take-up cover

Stitch length adjustment dial

Di󰀨erential feed adjustment dial

Cloth plate

Handwheel

Machine socket

Main Power/Light switch

Looper cover with built in

knife guard

Looper cover opening indent

Thread cutter

Presser foot lifter

Stitch plate

Needle clamp

Upper knife

Presser foot

Automatic needle threader

Thread guide No. 1

Magnet needle tray

Micro-lifter dial *1

Top cover

Spool holder pin

Anti - vibration cone

Foam pad

Thread stand

Upper knife changeover knob

TWA

(Tweak Width Adjustment)

Upper looper

Lower looper

Threading hole

Lower knife

Upper knife xing screw

Cutting width adjusting dial

Selection lever for overlocking

or roll hemming

Air-control pushbutton

Threading changeover

lever

Presser foot pressure

regulating knob

*1: Only for MO-2500 type

Magnet needle tray

Roll hemming thread

tension lever

Knee lifting lever hole

Front cover

Retractable support rod

–3 –

Safety switch

Looper threading

mechanism

Knife

Power PCB

Air pump motor

Motor

2. Inside of the cover

Safety switch

Front face

Rear face

*1: Only for MO-2500 type

Knee lifting mechanism

Micro lifting

mechanism *1

Needle threading mechanism

–4 –

❸

1. Removing the top cover

○Remove roll hemming thread tension lever ❶by pulling it out toward you.

○Loosen presser foot pressure regulator knob ❷and remove it.

○Turn micro lifter knob ❸to move it downward until it will go no further. Then, pull it upward until it comes

o󰀨.

(When assembling the aforementioned parts, install presser foot pressure regulator knob ❷by turning it

after you have installed the top cover. For the micro lifter knob ❸, adjust rstly so that the at portion of

the shaft faces in the same direction as the at portion of presser foot pressure regulator knob ❷. Then,

t micro lifter knob ❸over the shaft until it will go no further.)

❶

❷

❸

Flat portion of the knob

Flat portion of the shaft

When assembling

STANDARD ADJUSTMENT / DISASSEMBLY AND ASSEMBLY

Assembly should be carried out in the reverse order of the disassembly procedure.

–5 –

Rear face

○Remove one screw ❹to remove the thread stand.

○Remove two screws ❺to remove the thread stand base.

○Remove two screws ❻.

○While lifting up the rear side of the top cover, remove it by prying out the claws on the side face (at four

locations on the right and left) with a at-blade screwdriver or the like.

○While lifting up the rear side of the top cover further, remove the top cover from the four claws on the front

face by pushing them in the forward direction.

❹❺

❻

Claws

Claws (after the top cover is removed)

Claws

–6 –

❶

❷

Cable clip band

Safety switch

❸

Safety switch cable

❹

2. Removing the cloth plate cover

○Remove two screws ❶of the bottom plate.

○Remove one screw ❷from the rear side face of the cloth plate.

○For the cloth plate front and rear parts of which are hinged together, remove two safety switch setscrews

❸and remove the two cable clip bands.

○Remove one setscrew ❹of the cloth plate, small. Remove the cloth plate, small by turning it diagonally

upward.

Bottom face

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