1. Setting the belt . .................................................................................................................................... 3

2. Installing the thread stand .................................................................................................................. 4

3. Installing the belt cover� the bobbin winder base and the bobbinwinder ...................................... 5

4. Installing the hemming binder . ........................................................................................................... 6

5. Applycation of grease ......................................................................................................................... 7

#. INSTALLATI�N (DLN�6390�7)....................................................................................... 8

1. Installing and settIng of SC�921 ......................................................................................................... 8

2. Wiring the cords .................................................................................................................................. 9

3. Installing the knee switch ................................................................................................................. 10

4. Piping pneumatic components and wiring electric components ................................................. 11

$. INSTALLATI�N (DLN�6390) . ....................................................................................... 12

1. Selecting the motor pulley and the belt . .......................................................................................... 12

2. Installing the motor ........................................................................................................................... 13

3. Set�up of the hemming binder open/close mechanism ................................................................. 14

4. Set�up of the presser foot lifting mechanism ................................................................................. 15

5. Simultaneous operation of the presser foot lifting and open/close of the hemming binder ....................... 16

%. LU�RICATI�N AND DRAINING . ................................................................................. 17

1. Lubrication ......................................................................................................................................... 17

2. Draining .............................................................................................................................................. 18

3. Adjusting the amount of oil .............................................................................................................. 19

^. �PERATI�N ................................................................................................................ 21

1. Attaching the needle ......................................................................................................................... 21

2. Setting the bobbin into the bobbin case ......................................................................................... 21

3. Threading the machine head ............................................................................................................ 22

4. Adjusting the stitch length ............................................................................................................... 23

5. Winding the bobbin thread ............................................................................................................... 24

6. Thread tension ................................................................................................................................... 25

7. Theead take�up spring ...................................................................................................................... 25

8. Adjusting the thread take�up stroke ................................................................................................ 25

&. ADJUSTING THE SEWING MACHINE ....................................................................... 26

1. Adjusting the height of the needle bar ............................................................................................ 26

2. Installing position of the hook . ......................................................................................................... 27

3. Adjusting the needle stop position . ................................................................................................. 28

4. Explanation and adjustment of the pedal components ................................................................. 29

5. Adjusting the wiper ........................................................................................................................... 30

6. Hand lifter ........................................................................................................................................... 31

7. Adjusting the presser foot pressure (upper feed roller) and

the height of the presser foot (upper feed roller) ........................................................................... 31

8. Adjusting the presser foot pressure (presser foot (asm.)) and

the height of the presser foot (presser foot (asm.)) ....................................................................... 32

*. TR�U�LES IN SEWING AND C�RRECTIVE MEASURES ....................................... 33

(. THREAD TRIMMER C�MP�NENTS .......................................................................... 36

1. Checking the receding position of the moving knife and the correcting method . ...................... 36

2. Checking the thread trimmer cam timing . ....................................................................................... 37

3. Counter knife . ..................................................................................................................................... 38

). SETUP �� PTI�NAL C�MP�NENTS ..................................................................... 39

1. Needle cooler ..................................................................................................................................... 39

_. SETTING �� SC�921 . .................................................................................................. 44

1. Setting of the auto lifter function ..................................................................................................... 44

C�NTENTS

Inhaltsverzeichnis