JUKI LK-1900B series - Page 3

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IV. EXPLANATION OF THE LK-1903B,
COMPUTER-CONTROLLED HIGH-
SPEED LOCKSTITCH BUTTON
SEWING MACHINE .............................79
1. SPECIFICATIONS ............................................79
2. PREPARATION OF THE SEWING MACHINE 79
2-1. Installation of the sewing machine and
preparation of the operation .......................... 79
2-2. Needle and thread ........................................... 79
2-3. Various sewing modes .................................... 80
3. ADJUSTMENT OF THE SEWING MACHINE .81
3-1. Position of the button clamp jaw lever .......... 81
3-2. Adjusting the feed plate .................................. 82
3-3. Adjusting the button clamp jaw lever ............ 83
3-4. Adjusting the lifting amount of the button
clamp ................................................................ 83
3-5. Adjustment of the pressure of the work
clamp unit ........................................................ 84
3-6. Adjustment of the wiper spring ...................... 84
4. OTHERS ..........................................................85
4-1. Installing the save button bar (accessory
part) .................................................................. 85
4-2. Model classication according to the
button size ....................................................... 85
4-3. Attaching the shank button (optional) ........... 86
V. EXPLANATION OF THE LK-
1903BBS HIGH-SPEED COMPUT-
ER-CONTROLLED FLAT BUTTON
SEWING MACHINE (WITH THE
BIRD'S NEST PREVENTING AND
SHORTER-THREAD REMAINING
TYPE THREAD TRIMMER) .................90
1. SPECIFICATIONS ............................................90
2. PREPARATION OF THE SEWING MACHINE 90
2-1. Installation of the sewing machine and
preparation of the operation .......................... 90
2-2. Installing the regulator and solenoid valve
asm. .................................................................. 91
2-3. Installing the air hose...................................... 91
2-4. Connecting the cords ...................................... 92
2-5. Connecting the air piping ............................... 93
2-6. Installing the cloth chip bag ........................... 95
2-7. Fixing the nger guard .................................... 95
2-8. Needle and thread ........................................... 96
2-9. Various sewing modes .................................... 96
3. ADJUSTMENT OF THE SEWING MACHINE .97
3-1. Adjusting the knife for the shorter thread
remaining thread trimmer ............................... 97
3-2. Adjusting the suction pipe for the shorter-
thread remaining type thread trimmer .......... 98
3-3. Replacing the knife of the shorter-thread
remaining type thread trimmer ...................... 99
3-4. Adjusting the work clamp rod (For
1903BBS only) ............................................... 100
3-5. Replacing the non-slip sheet (For
1903BBS only) ............................................... 100
4. MAINTENANCE .............................................101
4-1. Cleaning the inside of the hook cover......... 101
4-2. Cleaning the thread clamp............................ 101
VI. EXPLANATION OF THE LK-1900BB
COMPUTER-CONTROLLED, HIGH-
SPEED BARTACKING MACHINE
(WITH THE BIRD'S NEST PREVENT-
ING AND SHORTER-THREAD RE-
MAINING TYPE THREAD TRIMMER) .102
1. SPECIFICATIONS ..........................................102
2. PREPARATION OF THE SEWING
MACHINE ....................................................... 103
2-1. Table of the sewing patterns ........................ 103
3. ADJUSTMENT OF THE SEWING MACHINE 105
3-1. Replacing the bird's nest preventing knife . 105
VII. DRAWING OF THE TABLE .............106