Table Of Contents - JUKI LH-3500A series Instruction Manual

Lh-3500a series

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Instruction manual (58 pages)

Quick start manual (2 pages)

Table of 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 ............................................................................................................. 6

3-4. Installation of thread stand ............................................................................................................................... 6

4. PREPARATION OF THE SEWING MACHINE .............................................................. 7

4-1. Method of lubrication ........................................................................................................................................ 7

4-2. Lubrication to the oil tank ................................................................................................................................. 8

4-3. Draining of oil from the oil tank ....................................................................................................................... 9

4-4. Adjusting the amount of oil in the hook .......................................................................................................... 9

4-5. Oil in the feed box ........................................................................................................................................... 10

4-6. Applying grease............................................................................................................................................... 11

4-7. Setting up the SC-920 ..................................................................................................................................... 14

4-8. Installing the belt cover (For LH-3528A, 3568A, 3578A and 3588A) ........................................................... 18

4-9. Attaching the needles ..................................................................................................................................... 18

4-10. How to take out the bobbin case ................................................................................................................... 19

4-11. Inserting a bobbin in a bobbin case .............................................................................................................. 19

4-12. Threading the machine head .......................................................................................................................... 20

4-13. Thread tension ................................................................................................................................................. 23

4-14. Winding the bobbin thread ............................................................................................................................. 24

4-15. Thread take-up spring ..................................................................................................................................... 25

4-16. Adjusting the stitch length ............................................................................................................................. 27

4-17. Needle-to-hook relation .................................................................................................................................. 27

4-18. Pedal pressure and pedal stroke ................................................................................................................... 29

4-19. Adjustment of the pedal .................................................................................................................................. 29

5. OPERATION OF THE SEWING MACHINE ................................................................ 30

5-1. Pedal Operation ............................................................................................................................................... 30

5-2. Hand lifter ......................................................................................................................................................... 30

5-3. Adjusting the pressure of the presser foot ................................................................................................... 31

5-4. Micro-lifter ........................................................................................................................................................ 31

5-5. Thread tension release changeover when using the knee lifter ................................................................. 32

5-6. One-touch manual reverse feed (One-touch reverse feed type) ................................................................. 32

6. MAINTENANCE ........................................................................................................... 33

6-1. Procedure of changing over between bottom feed and needle feed and the adjustment (for LH-3528A

only) .................................................................................................................................................................. 33

6-2. Changing the feed timing ............................................................................................................................... 35

6-3. Adjusting the thread trimming cam ............................................................................................................... 36

6-4. Adjusting the hook needle guard ................................................................................................................... 37

6-5. Adjusting the inner hook guide ...................................................................................................................... 37

6-6. Adjusting the height and the inclination of the feed dog ............................................................................ 38

6-7. Replacing the gauge ....................................................................................................................................... 39

6-8. Adjusting the thread presser spring.............................................................................................................. 39

6-9. Adjusting the position of the moving knife ................................................................................................... 40

6-10. Position of the wiper ....................................................................................................................................... 41

6-11. Caution when installing the attachments ...................................................................................................... 41

6-12. Replacing the bobbin thread slack preventer spring (For LH-3568A, 3568A-7, 3588A and 3588A-7) ..... 42

6-13. Stop of the needle bars and angle of corners for corners stitching (For LH-3568A, 3568A-7, 3588A and

3588A-7)............................................................................................................................................................ 42

7. STITCH-TO-ANGLE TABLE BY GAUGE (PITCH AND mm CONVERSION TABLE) 43

8. GAUGE SETS .............................................................................................................. 44

9. TROUBLES AND CORRECTIVE MEASURES ........................................................... 53

10. MOTOR PULLEY AND BELT ...................................................................................... 55

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