Juki LBH-1790S Computer-controlled, High-speed, Buttonholing Machine, Servo motor, T-Stand, 31 Standard Buttonhole Styles, 99 Pattern Storage

• Setting of functions such as the pattern number and the needle thread tension can be entered through the operation panel with ease. It is also possible to easily change the distance between buttonholes by means of the enlargement / reduction function.
  
• The operation panel is provided as standard with a USB port. This means that the sewing machine data management and software updating can be carried out with ease by means of the USB port.
  
  This sewing machine achieves higher productivity with its improved capabilities such as the maximum sewing speed of 4,200 sti/min, quick acceleration at the beginning of sewing and quick deceleration at the end of sewing, increased thread trimming speed and the auto-lifter performance.
  
  Main functions driven electrically
  The electric-driven mechanism has been adopted for the work clamp foot lifter, needle / bobbin thread trimmers, work clamp foot pressure regulator, cloth trimming knife and thread tension controllers, thereby ensuring stable sewing that produces beautiful seams with less operating noise.
  
  Active tension (electronic thread tension control mechanism)
  
• The needle thread tension can be separately set for the parallel section and bartacking section of the buttonhole seam according to various sewing conditions (thread, material, sewing speed, etc.) given, and those setting data can be stored in memory.
  
• The needle thread tension can be changed over at the parallel and bartacking section of the buttonhole seam without fail, thereby producing beautifully-finished buttonhole stitch shape.
  
• The needle thread tension to be employed at the beginning and end of sewing can be set individually.
• This helps prevent slip-off of the thread at the beginning of sewing and unravel of the finished seam.
  
  Multiple-times knife dropping
  Thanks to JUKI's unique multiple-times knife dropping function, the knife replacement is no longer required even when the buttonholing size is changed. In the case of small-lot production, frequent change in the sewing size and / or sewing of different cycle sewing patterns with different sewing sizes are required. In such a case, the number of times to drop the cloth trimming knife are automatically set according to the buttonholing size.
  
  As many as 31 different buttonholing shapes are provided as standard
  As may as 99 different sewing patterns can be stored in memory.
  The sewing patterns that are stored in memory can be selected as desired through the operation panel.
  
  Work clamp foot lifting height
  The work clamp foot lifting height can be set as desired. The work clamp foot can be lifted as high as to 17 mm by the use of the reverse-rotation needle-up function.
  
  Basting stitch on elastic materials
  The basting stitch is effective on elastic materials such as knits.
  
  Basting stitch : Since the needle thread is tucked in without fail, it will never jut out of the buttonhole seams. Basting stitch can be sewn by nine rounds.
  
  Easy changeover of sewing settings
  Changeover between purl stitching and whip stitching and between single stitching and double stitching can be carried out with ease.

• Model name: LBH-1790S
  
• Application: Standard
  
• Lubrication: Semi-dry head (Hook : minute-quantity lubrication)
  
• Max. sewing speed: 4,200sti/min (at the time of delivery : 3,600sti/min)*
  
• Size of cloth cutting knife: 6.4-31.8mm (1/4"-1-1/4")
  
• Buttonhole length: Max. 41mm
  
• Needle thread tension: Active tension (solenoid)
  
• Needle (at the time of delivery): DP×5 (#11J) #11J-#14J
  
• Lift of the work clamp: 14mm (17mm when the reverse-rotation needle-up function is used)
  
• Auto-lifter: Provided as standard (stepping motor type)
  
• Needle throwing system: Stepping motor
  
• Cloth feeding system: Stepping motor
  
• Cloth cutting knife system: Motor-driven clamp system
  
• Number of standard patterns: 31 patterns
  
• Number of patterns that can be input: Max. 99 patterns
  
• Machine head drive system: Compact AC servomotor (direct-drive system)
  
• Power requirement/Power consumption: Single-phase 200-240V / 370VA
  
• Weight: Machine head (include motor) 55kg, Control box 5.5kg

The operation panel is provided as standard with a USB port. This means that the sewing machine data management and software updating can be carried out with ease by means of the USB port.

Active tension (electronic thread tension control mechanism)

As many as 31 different buttonholing shapes are provided as standard

Work clamp foot lifting height

Basting stitch on elastic materials

Choose unassembled or assembled stand for additional charge.