JUKI DDL-5530N Handbook page 129

Computer-controlled, High-speed, Lockstitch Button Sewing Machine
LK-1903
The machine provides the maximum number of revolutions of 2,500rpm.
This allows the machine to demonstrate the highest sewing performance
as compared with the conventional lockstitch button sewing machines.
The machine has been developed also to reduce the time required to
lift/lower the button clamp jaw lever, jump and trim the thread.
The LK-1903 is pre-programmed as standard with 33 different sewing
patterns. The machine permits easy changeover of sewing patterns for
effortless execution of an inexhaustible range of sewing specifications.
Moreover, the machine's upgraded flexibility allows the user to combine
any of the sewing patterns stored in memory for cycle sewing.
By electronically controlling the direction of the stitches during bartack
sewing to prevent the seams from being undone, the overall quality of
the finished seams is secured.
LK-1903/BR25
(with a button feeder)
The machine runs under three different operation modes: the automatic
supply mode, in which buttons placed in the feeder bowl are
continuously fed; the individual mode, in which the operator manually
inserts buttons one by one; and the small-lot mode, in which buttons
(five or six buttons) preliminarily prepared on the machine for one
section of a garment are automatically and continuously fed.
The machine is able to respond to diversified production systems
regardless of the lot size by designating the appropriate operation mode
from among the three different alternatives.
With its unique horizontally forced button-feed mechanism to eliminate
button jamming due to static electricity, the machine is able to feed
shell buttons to be attached to consistently garments without error.
SPECIFICATIONS
Model name
Sewing speed
Button size
Needle bar stroke
Needle (at the time of delivery)
Hook
Lift of the work clamp foot
Input pattern
Number of patterns that can be
stored in memory
Number of stitches that can be
stored in memory
Enlarging/Reducing facility
Memory medium
Bobbin thread counter
Supplying and sorting of button
Feeding of buttons
Button supply mode
Lubrication
Lubricating oil
Sewing machine motor
Weight
LK-1903
Max. 2,500rpm (normal 2,200rpm)
Type: Round-shaped, flat button
Size: 8 32mm
(standard 10 20mm)
Max. 13mm
Pattern enlargement/reduction can be done by increasing/decreasing the stitch length
(The bobin thread counter can be changed over to the No. of pcs. counter.)
JUKI New Defrix Oil No.2 (equivalent to ISO VG32)
400W compact AC servomotor (direct-drive system)
Machine head (include motor) 41kg,
Control box 16.5kg
Max. 2,300rpm (normal 2,200rpm)
Type: Round-shaped, flat button
(2-holed, 4-holed)
Size: 9 20mm
For small button:
For medium-sized button: 12
(The machine for sewing buttons of
which diameter is less than
more than
extra order.)
Thickness: 1.8 3.5mm
45.7mm
DP 17 (#14)
Standard shuttle hook
33 patterns are provided as standard
Max. 64 pattern
Max. 10,000 stitches
20% 200% (1% step),
EP-ROM
Provided as standard
Automatic supply mode, individual mode and
Horizontal forced button-feed mechanism
Centralized oil wick lubrication
(Include optional stand leg)
LK-1903
LK-1903/BR25
LK-1903/BR25
10 15mm
18mm
10mm or
18mm is available on an
Max. 11mm
By vibrator
small-lot mode
Total weight 133kg
LK-1903, 1903/BR25 (June, 2001) 1/4
7