iv
[9] OTHERS ...............................................................................................................................................45
1. Setting the DIP switch ................................................................................................................................... 45
2. Table of the standard pattern specifications ............................................................................................... 46
3. Table of the standard patterns ...................................................................................................................... 47
4. Table of the work clamp foot ......................................................................................................................... 49
5. LK-1900 data ROM ......................................................................................................................................... 51
6. Connection of the optional pedal ................................................................................................................. 51
7. Error list .......................................................................................................................................................... 52
8. Troubles and corrective measures (sewing conditions) ............................................................................ 55
9. Table of the optional parts ............................................................................................................................ 57
2. EXPLANATION OF THE LK-1901A, COMPUTER-CONTROLLED HIGH-SPEED
EYELET BUTTONHOLE BARTACKING MACHINE ................................................. 59
1. Specifications ................................................................................................................................................. 59
2. Installation of the sewing machine and preparation of the operation ...................................................... 59
3. Adjustment of the material closing amount ................................................................................................ 60
4. Adjustment of the lift of the work clamp foot .............................................................................................. 60
5. Adjustment of the pressure of the work clamp unit ................................................................................... 61
6. Setting of the material closing operation .................................................................................................... 61
7. Selection and confirmation of the sewing patterns .................................................................................... 62
3. EXPLANATION OF THE LK-1902A, COMPUTER-CONTROLLED HIGH-SPEED
BELT-LOOP ATTACHING MACHINE ........................................................................ 63
1. Specifications ................................................................................................................................................. 63
2. Installation of the sewing machine and preparation of the operation ...................................................... 63
3. Threading the machine .................................................................................................................................. 63
4. Selection and confirmation of the sewing patterns .................................................................................... 64
5. Combination of the work clamp foot and the feed plate ............................................................................ 64
4. EXPLANATION OF THE LK-1903A, COMPUTER-CONTROLLED
HIGH-SPEED LOCKSTITCH BUTTON SEWING MACHINE ................................... 65
1. Specifications ................................................................................................................................................. 65
2. Installation of the sewing machine and preparation of the operation ...................................................... 65
3. Needle and thread .......................................................................................................................................... 65
4. Various sewing modes .................................................................................................................................. 66
5. Position of the button clamp jaw lever ......................................................................................................... 67
6. Adjusting the feed plate ................................................................................................................................ 68
7. Adjusting the button clamp jaw lever .......................................................................................................... 68
8. Adjusting the lifting amount of the button clamp ....................................................................................... 69
9. Adjustment of the pressure of the work clamp unit ................................................................................... 69
10. Adjustment of the wiper spring .................................................................................................................... 70
11. Installing the save button bar (accessory part) .......................................................................................... 70
12. Model classification according to the button size ...................................................................................... 71
13. Attaching the shank botton (optional) ......................................................................................................... 72
5. DRAWING OF THE TABLE ...................................................................................... 76
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