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 updates 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.
Thanks to the Bird’s nest preventing / shorter-thread remaining functions, manual thread-nipping is no longer required and gives soft and smooth feeling on the bartaking sections where directly contact skin such as brassieres and tank tops.
The sewing machine eliminates so-called “bird’s nests” (thread tangling in on the wrong side of the material at the beginning of sewing).
The thread is retained at the beginning of sewing and any excess thread is trimmed during sewing. As a result, the length of thread sewn in the seam is shortened, thereby achieving high-quality sewing performance while preventing thread from tangling in on the wrong side “of the material.”
The length of thread remaining on the material at the end of sewing has been reduced to 2 mm or less.*
The newly-developed shorter-thread remaining mechanism trims the thread shorter after the regular thread trimming operation. Additionally, thread waste produced by thread trimming is withdrawn by suction. Thanks to this mechanism, the trouble of manual thread nipping is avoided. * Use #60-80 (TEX22-30) polyester spun thread
The machine achieves sewing speed of 3,200sti/min. The machine’s starting, stopping, thread-trimming and automatic presser lifting speeds have been increased to significantly shorten total cycle time.
The direct-drive head (with no belt), which is directly connected to a compact AC servomotor, achieves outstanding. This head helps create a comfortable working environment with reduced vibration and noise. The arm section of the machine head is fitted with a hand pulley. This allows the operator to visually check the needle entry points.
Needle thread grasping mechanism helps produce consistent knot tying at the beginning of sewing. (This device has been factory-set to “invoking prohibited” status at the time of delivery.)
In cases where the needle entry point for button sewing is to be corrected, the sewing starting point can be corrected without the adjustment of the relevant mechanism.
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 17mm. (Standard 14mm)
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 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 with, improving work efficiency.
The LK-1900BN model comes in five different subclass models, such as S type (standard), H type (for heavy-weight materials), F type (for foundation), M type (for knits and knitted materials), W type (with a large shuttle hook for heavy-weight materials) and (bird’s nest preventing / shorter – thread remaining functions), to offer a choice according to any application. The needle’s penetrating force into the material has been increased. This provides improved responsiveness to heavy-weight materials for the H type machine. The W type has adopted a large shuttle hook, which reduces the frequency of bobbin-thread changing to enable highly efficient sewing work.
|With large hook for heavy-weight|
|Max. sewing speed||3,200sti/min||2,700sti/min|
|Sewing area||30mm (L)×40mm (W)|
|Stitch length||0.1～10mm (0.1mm step)|
|Needle bar stroke||41.2mm|
|Lift of the work clamp||Standard 14mm (17mm when the reverse-rotation needle-up function)|
|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×5 (#14)||DP×17 (#21)||DP×5 (#11)||DP×5 (#11)||DP×17 (#21)|
|Hook||Standard shuttle hook||Large shuttle hook|
|Number of stitches
that can be stored in memory
|Max. 20,000 stitches|
|Number of data
that can be input
|200 patterns (for up to 150 patterns, sewing data can be added.)|
|Enlarging/Reducing facility||20~200% (1% step), Pattern enlargement/reduction can be done by increasing/decreasing the stitch length|
|Memory method||Internal-organs memory|
|Bobbin thread counter||Provided as standard (up/down method)|
|Lubrication||Hook: minute-quantity lubrication|
|Lubricating oil||JUKI New Defrix Oil No.2 (equivalent to ISO VG32)|
|Sewing machine motor||450W compact AC servomotor (direct-drive system)|
|Weight||Machine head (include motor) 42kg, Control box 5.6kg|