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Computer-controlled, High-speed, Buttonholing Machine
The World’s First – Shorter-Thread Remaining Functions
The newly-developed shorter-thread remaining mechanism trims the tread short and eliminated the trouble of manual thread nipping.
Description
Computer-controlled, High-speed, Buttonholing Machine
The World’s First – Shorter-Thread Remaining Functions
Excellent operability by Digitization
- Higher productivity
The maximum sewing speed is 4,200 sti/min., and the jump speed is 200 mm/s. The cycle time has been further reduced for continuous sewing. - Cycle sewing and continuous sewing.
- Cycle sewing
Twenty different programs can be registered, and as many as 15
different patterns can be stored in one program. - Continuous sewing
The Juki LBH-1790AB is able to continuously sew two or more different patterns without requiring the work clamp foot to be lifted. As may as 20 programs can be registered, and six different patterns can be stored in one program. (Related parts need to be exchanged for optional ones.)
- Cycle sewing
- All drive mechanisms are electronically controlled
- Electronic control of the material feed mechanism, needle feed mechanism, needle thread trimming mechanism, bobbin thread trimming mechanism, cloth trimming mechanism, presser lifter mechanism and other mechanisms has been achieved.
- All adjustment values are digitalized to enable the operator to set and store those values on the operation panel.
Technical Information
| Model Number | Juki LBH-1790AB |
|---|---|
| Sewing speed | Max. 4,200sti/min, Normal 3,600sti/min When the non-lubricated hook (optional) is used: 3,300sti/min |
| Needle bar stroke | 34.6mm |
| Size of cloth cutting knife | 6.4~31.8mm (1/4″~1-1/4″) |
| Bartacking width | Max. 5.0mm (with special-specification part: Max. 10mm*) |
| Buttonhole length | Max. 41mm (optional: 70mm, 120mm) , LBH1795:120mm |
| Precision of needle throwing mechanism | 0.05mm |
| Needle thread tension | Active tension (electronic thread tension control system) |
| Number of stitches | Automatically computed from the size of the buttonhole and stitch pitch |
| Needle (at the time of delivery) | DP×5 (#11J) #11J~#14J |
| Hook | DP type, full-rotary hook |
| Non-lubricated hook (optional) | |
| 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 | Intermittent feed by stepping motor |
| Cloth cutting knife system | Stepping motor |
| Number of standard patterns | 31 patterns |
| Number of patterns that can be input | Max. 99 patterns |
| Bobbin thread winder | Built-in the machine head |
| Machine head drive system | Compact AC servomotor (direct-drive system) |
| Power requirement/ Power consumption | Compact AC servomotor (direct-drive system) |
| Lubrication | Only the hook section needs a minute-quantity lubrication |
| Lubricating oil | Hook: JUKI New Defrix Oil No.1 (equivalent to ISO VG7) |
| Weight | Machine head (include motor) 55kg, Control box 6kg |
