The machine achieves sewing speed of 2,700sti/min The machine’s thread-trimming etc. have been increased to significantly shorten total cycle time. The machine is provided as standard with 50 different sewing patterns at higher productivity. The LK-1903BN is a lockstitch button sewing machine which is not only applicable to many different sewing specifications but also able to carry out cycle sewing and produces high-quality seams.
Data on sewing machine adjustments made according to the product to be sewn can be transferred to a commercially-available Android tablet in contactless mode. This enables quick check for uniform settings as well as confirmation of conditions of sewing machines in a sewing line, thereby facilitating setup changes. The operation panel is also provided as standard with a USB port. Data management and software update can be carried out with ease using a USB thumb drive. Data items of sewing can be numerically managed to ensure “stable quality” and “reduction in time required for setup changes”. Quantified sewing data can be externally taken from the sewing machine using an Android tablet or USB thumb drive. *Android OS Version 6.0 is recommended to use JUKI Smart APP. (Operation is confirmed with respect to Versions 5.0 and later. ) Contact JUKI distributor in your area for how to use the application software.
The machine achieves sewing speed of 2,700sti/min. The machine’s starting, stopping, thread-trimming and automatic presser lifting speeds have been increased to significantly shorten total cycle time.
Needle thread grasping mechanism helps produce consistent knot tying at the beginning of sewing.
The machine is provided as standard with 50 different sewing patterns. The machine permits easy changeover of sewing patterns for effortless execution of an inexhaustible range of sewing specifications.
The LK-1903BN is also able to sew buttons using the same data used for the LK-1903 (Data in EP-ROM are enabled by conversion).
The sewing starting point can be shifted in the X/Y direction. This enables the correction of a sewing pattern in accordance with the presser foot configuration.
Thanks to our advanced dry-head technology, the frame (needle bar and thread take-up) no longer requires lubrication. This prevents the material from being stained with lubricating oil.
Just a small quantity of clean oil is supplied from the oil tank to the hook.
An encoder is installed in the pulse motor, thereby achieving substantially improved power-consumption saving.
The machine is provided as standard with auto-lifter that uses a stepping-motor system. This helps reduce operator fatigue.
It is also possible to change over the stroke of the auto-lifter from a one-step stroke to a double-step stroke, which offers easier positioning of material on the machine. For the double-step stroke, an intermediate stopping height can be established on the operation panel.
The work clamp foot lift can be set to a maximum of 13mm.
Since the machine is provided with an active tension mechanism, it is able to set a needle thread tension that matches various sewing conditions (such as thread, material and sewing speed) on the operation panel, store the data in memory and reproduce it.
The needle thread tension can be separated according to stitching type or portion of a seam, such as the beginning part of the seam, base stitched part, zigzag stitched part and end of the seam (fastening stitch).
When the operation panel is used in combination with the active tension, the needle thread tension can be set on a stitch-by-stitch basis. This helps eliminate undesired thread tension variations at a multi-layered part of a material or with sewing direction, thereby contributing to upgraded seam quality.
The LED light can adjust the light intensity to 5 levels, and Off setting is also possible. The operator can set the brightness which is easy to work, improving work efficiency.
|Max. sewing speed||2,700sti/min|
|Button size||Type : Round-shaped, flat button
|Type : Round-shaped, flat button
|Round-shaped, flat button (2-holed, 4-holed)
For small button：φ10～φ15
For medium-sized button：φ10～φ18
(Those that are smaller than φ10mm or larger than φ18mm must be specially ordered.)
|Stitch length||0.1~10mm (0.1mm step)|
|Needle bar stroke||45.7mm|
|Lift of the work clamp foot||Max. 10mm||Max. 13mm||Max. 11mm|
|Auto-lifter||Provided as standard (stepping motor type)|
|Needle thread tension||Active tension (electronic thread tension control system)|
|Needle (at the time of delivery)||DP×17 (#11)||DP×17 (#14)|
|Hook||Standard shuttle hook|
|Number of stitches that can be stored in memory||Max. 20,000 stitches|
|Number of standard patterns||34 patterns||50 patterns|
|Number of data that can be input||200 patterns|
|Enlarging/Reducing facility||20~200%(1% step), Pattern enlargement /reduction can be done by increasing /decreasing the stitch length|
|Memory medium||Internal-organs memory|
|Bobbin thread counter||Provided as standard (up/down method)|
|Bird’s nest preventing /
Shorter-thread remaining functions
|Supplying and sorting of button||—||—||Vibration system|
|Button feed||—||—||Horizontal forced button-feed mechanism|
|Button feed mode||—||—||Automatic feed mode, non-feed mode, and small-lot sewing mode|
|Lubricating oil||Hook: minute-quantity lubrication
JUKI New Defrix Oil No.2 (equivalent to ISO VG32)
|Sewing machine motor||Compact AC servomotor (direct-drive system)|
|Weight||Machine head (include motor) 42kg, Control box 5.1kg||Machine head (include motor) 42kg, Control box 5.1kg||131kg (include machine head, table and BR35)|