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蠶 . EXPLANATION OF THE LK-1903A, COMPUTER-CONTROLLED HIGH-
SPEED LOCKSTITCH BUTTON SEWING MACHINE
1. Specifications
Different specifications from those of the LK-1900A only are described.
1) Sewing speed .............................................. Max. 2,700rpm
2) Needle ......................................................... DPx17 #14
3) Lifting method of the work clamp foot.......... Stepping motor
4) Lift of the work clamp foot ........................... Max. 13mm
5) Number of standard patterns....................... 50 patterns
6) Wiper method .............................................. Interlocked with work clamp foot lifter driven by stepping
motor
* The needle thread clamp device is set to prohibition (state of standard delivery) with memory
switch No. 35. Refer to 6. Thread clamp device of [6] OPERATION OF THE SEWING MACHINE
(ADVANCED).
2.
Installation of the sewing machine and preparation of the operation
1) Installation of the sewing machine head and the
control box is the same as that of the LK-1900A.
Refer to the instruction manual for the LK-1900A.
2) Install a set of the button tray base to a convenient
place for the work as the set is included in the
accessories.
3) The way of operation is the same as that of the
LK-1900A.
Make sure before operation that the
needle does not strike against the button
hole.
Set of button
tray base
3. Needle and thread
Needle and thread will vary in accordance with the
sewing conditions. When using the needle and the
thread, select them referring to the left table. Cotton
thread and polyester spun thread are recommended.
Needle Needle thread
#60
#60
#50
#40
Bobbin thread
#80
#60
#60
#60
DPx17 #14
WARNING :
Be sure to perform the work with two persons or more when moving the sewing machine.
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