Computer-controlled, High-speed, Bartacking Machine
The Juki LK-1901B is provided with a material-drawing mechanism which draws the right and left parallel portions of an eyelet buttonhole near to one another. The Juki LK-1901B performs bartacking with the right and left parallel portions of the eyelet buttonhole drawn near to one another after the buttonhole is clamped under the work clamp foot, thereby finishing highly durable and well-tensed eyelet buttonholes.
The Juki LK-1901B 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.
Excellent workability and operability. (Low-noise and low-vibration)
The direct-drive head (with no belt), which is directly connected to a compact 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.
Excellent seam quality.
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.)
The machine is provided as standard with the active tension (electronic thread tension control mechanism).
Since the Juki LK-1901B 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 IP-420U 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.
|Model name||Eyelet buttonhole
|Belt-loop attaching machine|
|Juki LK-1901B-SS||Juki LK-1902B-SS||Juki LK-1902B-HS|
|Application||Standard||Standard|| For heavy-weight
|Max. sewing speed||3,000sti/min✽|
|Sewing area||30mm (L) × 40mm (W)|
|Needle bar stroke||41.2mm|
|Lift of the work clamp foot|| Standard 14mm
(by using the reverse-rotation needle-up function 17mm)
|Auto-lifter||Provided as standard (stepping motor type)|
|Needle thread tension||Active tension (electronic thread tension control mechanism)|
|Needle (at the time of delivery)||DP×5 (#14)||DP×5 (#14)||DP×17 (#21)|
|Hook||Standard shuttle hook|
|Number of stitches
that can be stored in memory
|Max. 20,000 stitches|
|Applicable pattern number||11, 12, 13|| 17, 18 (19, 20, 21, 22*)
*This device has been factory-set to
“ invoking prohibited ”
status at the time of delivery.
|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|
|Material drawing amount||Max. 3mm||–|
|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|