Juki LBH-1796AS Computerised Button Hole (Indexer)

Thanks to the multiple knife-dropping function, it is no longer required that the knife be changed at the buttonhole size is changed. The knife supports sewing lengths of 41mm at the maximum. In addition, knife mechanisms for 70mm and 120mm are optionally available. With this, slots such as the belt holes of child seat belts can be buttonholed. Needle thread tension for sewing parallel and bartacking sections of buttonholes can be separately controlled through the operation panel and stored in memory according to various sewing conditions (e.g., type of thread, type of material and sewing speed). LBH-1796A: Buttonholing machine with a 220mm work clamp which supports the simplified indexer function has been added to the family of buttonholing sewing machines. LBH-1790AB: Computer-controlled, High-speed, Buttonholing Machine with a shorter-thread remaining function. The newly-developed shorter-thread remaining mechanism trims the thread short and eliminates the trouble of manual thread nipping.

JUKI's unique active tension (Electronic thread tension control system)

Without basting stitch With basting stitch Basting stitch (The state in which the material is stretched in the lengthwise direction after buttonholing) Needle thread tension for sewing parallel and bartacking sections of buttonholes can be separately controlled through the operation panel and stored in memory according to various sewing conditions (e.g., type of thread, type of material and sewing speed).
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.
The machine is able to change the needle thread tensions at the parallel and bartacking sections of the buttonhole, to produce a beautiful buttonhole shape.
This capability helps greatly in preventing thread breakage.
Needle thread tension is activated at the beginning and end of sewing.
This prevents unthreading of the needle thread, and thread fraying that is likely to occur at the beginning of sewing.
Thread tension for basting stitching can be specified separately.

The machine is equipped with a multiple knife-dropping function

Thanks to the multiple knife-dropping function, it is no longer required that the knife be changed at the time the buttonhole size is changed.
The number of knife dropping times can be automatically set according to the buttonholing size in cases where the buttonhole size is frequently changed for small-lot productions or during the cycle sewing of buttonholes that are different in size.
The double-acting stepping motor type knife mechanism is free from the faulty dropping/returning of the knife.
The knife supports sewing lengths of 41mm at the maximum.
In addition, knife mechanisms for 70mm and 120mm are optionally available.