Siruba lbhs-1790d

Siruba LBHS-1790D – Advanced Electronic Buttonhole Sewing Machine with Servo Motor and Programmable Functions

The Siruba LBHS-1790D is a high-precision electronic buttonhole sewing machine specifically designed for lingerie and lightweight fabric production. This two-thread lockstitch machine features a built-in servo motor housed directly within the machine head, offering superior power control, energy efficiency, and silent operation.

Uniquely, the LBHS-1790D is equipped with multiple stepper motors that independently manage critical machine functions, including the trimming of upper and lower threads, the material feed table movement, needle bar motion, presser foot control, and knife actuation. This modular motor arrangement ensures precise synchronization and smooth operation across all mechanisms, enhancing stitch quality and machine reliability.

Operation is controlled via a user-friendly, color touchscreen LCD panel that provides intuitive navigation through machine settings and stitch parameters. The control system supports rapid adjustment of sewing speed and stitch characteristics, allowing operators to save up to 50 custom buttonhole programs in addition to the 21 factory presets. Each program can include up to 999 stitch steps, offering exceptional versatility for complex buttonhole designs and production requirements. Additionally, a USB interface enables easy transfer, backup, and sharing of stitching programs between machines or for remote editing.

The machine supports multicutting functionality, enabling the knife to perform multiple cutting strokes during a single buttonhole cycle. This allows the production of buttonholes of varying lengths without physically changing the knife size, expanding the range of possible buttonhole dimensions. Optional attachments further enable sewing buttonholes up to 7 or even 12 centimeters in length, suitable for specialized garment needs.

To ensure durability and aesthetic quality, the LBHS-1790D offers four types of pre-stitch reinforcements designed to stabilize the fabric around the buttonhole:

Rectangular reinforcement stitch, which prevents material stretching during wear, especially effective on elastic fabrics.

Tip reinforcement stitch, which strengthens buttonhole corners to prevent deformation during repeated use, critical for thick or tightly woven materials.

Cross reinforcement stitch, used for thick or fluffy fabrics, which compresses the pile to prepare for final stitching.

Zig-zag reinforcement stitch, which solidifies the initial stitching before the buttonhole is cut open, ensuring clean and robust edges.

Technically, the machine sews at speeds up to 4200 stitches per minute, with a standard presser foot size of 5 x 41 mm and a needle bar stroke of 34.6 mm. It utilizes the DPx5 needle system and operates on a standard 230V/50Hz power supply.

In summary, the Siruba LBHS-1790D is a technologically advanced, programmable buttonhole machine offering precise control, high-speed production, and broad customization options. Its integration of servo and stepper motors with an intuitive interface makes it an ideal choice for lingerie and delicate garment manufacturers aiming for consistent quality and production efficiency.