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1. Specifications
No. Application
LK-1900A LK-1901A LK-1902A LK-1903A
1 Application Bartacking
Eyelet buttonhole bartacking
Belt-loop attaching
Lock stitch button sewing
2 Sewing area
X-Direction (right, left) 40mm; Y-Direction (forward, backward) 30mm
3 Button size Type: Round-shaped, flat button
ø 8 to ø32mm, Standard (ø8 to ø20mm)
4 Max. sewing * 3000rpm max. * 3000rpm max. * 2700rpm max.
speed
5 Stitch length 0.1mm to 10.0mm (adjustable in 0.1mm step)
6
Feed motion of work clamp foot
intermittent feed (2-shaft drive by stepping motor)
7 Meddle bar stroke 41.2mm 45.7mm
8 Needle DPX5 #14 DPX17 #14
DPX5#11 (F, M) (DPX17#21
(DPX17#21 heavy-weight material)
heavy-weight material)
9 Work clamp lifting Pulse motor
system
10 Lifting (lift) amount Standard 14mm, Max.17mm (In the reverse-rotation needle-up Max. 13mm
of work-clamp foot function)
11 Number of standard 50 patterns 3 patterns 6 patterns 50 patterns
patterns
12 Wiper system Interlockly with work clamp foot lifter by pulse motor
13 Needle thread Standard: General 0 Standard: Disable 1
clamp device (Caution) 1.
14
Needle thread tension
Active tension (electronic thread tension control mechanism)
15 Hook
Standard semi-rotary hook
Standard semi-rotary hook
(2-fold semi-rotary hook)
16 Lubrication Hook : minute-quantity lubrication
17 Lubricating oil JUKI NEW Defrix oil (equivalent to ISO VG32) (Lubrication system)
18 Grease 1. Penetration No. 2 lithium grease, 2. Templex N2, 3. Juki Grease A, 4. Juki Grease B (Caution)2.
19 Memory medium EEP-ROM (128Kbyte) EP-ROM (32Kbyte)
20
Number of stitches that
Max. 20,000 stitches
can be stored in memory
21 Enlarging/Reducing X-Direction, Y-Direction: 20 ~ 200% each (1% step)
facility
22
Enlarging/Reducing method
Pattern enlargement/reduction can be done by increasing/decreasing the stitch length
23
Sewing speed limits 450 ~ 3000rpm (100rpm step) (2700rpm max. for the 2-fold semi-rotary hook)
400 ~ 2700rpm (100rpm step)
24
Material clrawing amount
Max. 3mm
25
Pattern selector facility
Pattern No. designation system (1 ~ 200)
26
Bobbin thread counter
Up/Down method (0~9999)
27
Sewing machine motor
450W compact AC servomotor (direct-drive system)
28
External dimensions
W: 1200mm, L: 660mm, H: 1100mm (standard table stand applied)
29 Weight Machine head (include motor): 42kg, Control box: 16.5kg
30
Power consumption
320W
31
Working temperature range
5°C~35°C
32
Working humidity range
35% ~ 85% (no dew condensation permissible)
* Maximum sewing speed should be reduced according to the sewing conditions.
(Caution) 1. LK-1903A is set to needle thread clamp prohibited (no motion) with memory switch No. 35 at
the time of standard delivery.
2. Grease type, refer to (3) Greasing parts of [9] Maintenance.
Model name
Item
(When sewing pitches are less than 5mm in
X-direction and 3.5mm in Y-direction)
(*2700rpm fo the
2-fold semi-rotary hook)
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