The JUKI LK-1903S is part of the "Simple Series," designed to provide JUKI's renowned seam quality with essential, user-friendly features. It is a direct-drive, high-speed lockstitch machine specifically engineered for attaching flat round buttons (2 or 4 holes). Its key distinction is the inclusion of a voice guidance system and USB connectivity, which enhance productivity and ease of use on the factory floor .
Key Features
Voice Guidance System: A unique feature for this class of machine. It provides voice prompts to the operator regarding production counts, work progress, and machine operation rate, aiding in production management .
Higher Productivity: Cycle time is reduced thanks to optimized speeds for starting, stopping, thread trimming, and the movement of the button clamp and work clamp .
Versatile Stitching Capabilities:
Comes standard with 50 pre-programmed stitch patterns for various button types and stitching styles (e.g., X, C, Z, U, parallel) .
The pattern enlargement/reduction function allows for easy adjustment of the distance between stitch holes from 20% to 200% via the operation panel .
Compatible with data from the previous LK-1903 model (data conversion required) .
Enhanced Operability:
Auto-Lifter: A standard stepping-motor-driven auto-lifter raises the work clamp foot to a maximum of 13mm, reducing operator fatigue .
LED Light: A bright, long-lasting LED light illuminates the needle entry area. It has 5 brightness levels and an off function .
Direct-Drive System: A compact AC servo motor is directly connected to the main shaft, enabling quick startup, precise stopping, and excellent responsiveness .
User-Friendly Operation Panel:
Equipped with a USB port for easy data management (backup/restore) and software updates .
Assign frequently used patterns to the dedicated pattern keys (P1-P25) for one-touch selection .
Technical Specifications
Specification
Detail
Model Name
LK-1903S-SS
Application
Standard (Attaching flat round buttons)
Max. Sewing Speed
Up to 2,700 sti/min (stitches per minute)
Button Size
φ8 mm – φ32 mm (φ15–φ32 with optional parts)
Needle
DP×17 (#14 at delivery)
No. of Needles
1
Needle Bar Stroke
45.7 mm
Stitch Length
0.1 mm – 10 mm (adjustable in 0.1 mm steps)
Work Clamp Lift
Max. 13 mm (standard with stepping motor auto-lifter)
Lubrication
Semi-dry head (hook requires minute-quantity lubrication)
Standard Patterns
50 patterns
User Programmable
Up to 200 patterns, Max. 20,000 stitches of memory
Pattern Scaling
20% – 200% (in 1% units)
Bobbin Thread Counter
Standard (up/down method)
Motor
Compact AC servomotor (direct-drive system)
Power Supply
Single-phase 200–240V / 250VA
Weight
Machine head (incl. motor): 42 kg, Control box: 5.1 kg