JUKI has launched its new direct-drive, high-speed, lockstitch sewing system with automatic thread trimmer – the DDL-9000C. The machine has been digitalized to allow for easy adjustment of settings such as the feed mechanism, thread tension and the feed locus, all through the operation panel. Perfect parameters needed to achieve a high quality seams can be achieved digitally and key conditions do not need to be manually adjusted. For factories which produce diversified products using different materials, this feature is quite helpful to achieve stable seam quality in a time efficient manner.
Data on sewing machine adjustments made according to the product to be sewn can be transferred to a commercially-available Android tablet in contactless mode. This enables quick check for uniform settings as well as confirmation of conditions of sewing machines in a sewing line, thereby facilitating setup changes.
The operation panel is also provided as standard with a USB port.
Data management and software update can be carried out with ease using a USB thumb drive.
Data items of sewing can be numerically managed to ensure “stable quality” and “reduction in time required for setup changes”.
Quantified sewing data can be externally taken from the sewing machine using an Android tablet or USB thumb drive.
The LED light illuminates the needle entry area in the just-under direction from the right and left sides of the needle bar. In comparison with the single-direction illumination, this LED light helps the operator carry out sewing more easily. Illuminance of the LED light is adjustable in five levels. It can also be used as an auxiliary lamp for working.
Ⅰ.Adoption of the needle-thread active tension
Needle tension is digitally controlled
Needle thread tension which matches sewing conditions given can be set on the operation panel and stored in memory.
The needle thread tension adjustment needs experience. However, for this sewing machine, thread tension data stored in memory is reproducible, thereby reducing the setup time when the product to be sewn is changed.
Example : Needle-thread active tension demonstrates its effectiveness in the topstitching process.
For welting shoulders of a difficult-to-sew material, uniform stitches can be produced continuously by appropriately changing the sewing conditions even if the right and left material fabric differ in texture grain.
Ⅱ.Active presser foot pressure mechanism
The presser foot pressure is digitally controlled
Digital control system controls the presser foot pressure.
Under the automatic mode, the multi-layered section detection function detects changes in material thickness to increase/decrease the presser foot pressure accordingly.
Under the manual mode, the presser foot pressure control function is assigned to the hand switch to enable operation with the hand switch.
Ⅲ.Needle thread clamp
The device clamps the needle thread and draws it under the material at the beginning of sewing. The needle thread clamp device works to reduce the size of thread tangling in on the wrong side of the material. This expands the area around the needle entry, thereby allowing the use of various gauge components.
Double-edge driven rotary knife system is adopted. The double edges of the knife intersect with each other directly under the needle entry point to trim the thread.
Achievement of thread length remaining on the material after thread trimming as short as 3 mm The grooved cam system is adopted to enable forcible release of the thread trimmer even if the thread trimmer locks.
The picker device is also adopted.
The picker device secures a sufficient length of needle thread, as well as it stabilizes the length of thread remaining on the material.
