Tuesday, March 9, 2021

Embroidery Sewing Motor Drive and Control of sewing machines - VS SewingMachine

 Embroidery Sewing Motor Drive and Control of sewing machines - VS SewingMachine

According to the requirements of one industrial sewing machine (ISM) manufacture, a kind of digital servo system for ISM has been designed in this paper. First of all, SVPWM has been analyzed in driving Permanent Magnet Synchronous Machine (PMSM) carefully. Afterwards, a reliable method adopted for both speed and position measurement without photoelectric encoder has been presented. Then, considering about the speed regulating for the servo system, nonlinear PI control algorithm with the control strategy of single closed loop has been proposed. And meanwhile, a `Five Steps' algorithm for needle location of the system has been discussed in detail. At last, with both simulation and test results, the validity and veracity of the control strategies for motor driving, motor speed regulating and needle location of ISM can be proved effectively. Sewing Machine Showroom in St Thomas Mount

The textile specimen we consider have a size of 1m x 1m. Simultaneously, the spatial accuracy of detected stitch positions needs to be in the order of 50µm to account for very thin threads. In a real world scenario, both requirements can only be combined by using a commercially available camera sequentially scanning individual parts of the specimen. Afterwards, all of the acquired tiles are composed to obtain a unified, large RGB image, C(x, y) = (R(x, y), G(x, y), B(x, y))T , where (x, y) denotes the pixel position.the real world system for image acquisition and quality inspection. A camera is mounted on a gantry robot, allowing to automatically translate the camera in 3D space. The specimen to inspect is placed on the floor below. The camera has a sensor size of 2332 x 1752 pixels. Considering the employed lens, this translates to a resolution of 8 pix mm .Sewing Machine Showroom in Taramani However, the pixel resolution can be dynamically changed by decreasing or increasing the camera height over the conveyor plate using the gantry robot. Once the measurement has been started, the specimen is scanned in equidistant intervals resulting in a set of tile images which need to be composed. The image composition is performed using standard image registration techniques.




By separation into partial images, the pixels representing the thread will only be visible in one of them. They will always appear as a bright structure. Next to the actual thread pixels, there will also appear spurious pixels from noisy tissue structures. They resemble thread-like structure parts and are stochastically distributed.Sewing Machine Showroom In Chennai Branches

With the purpose of both acquiring nice performance and reducing the cost of the system, this paper has studied and designed an ISM servo system based on PMSM without photoelectric encoder. In section II, we discusses some key important techniques about motor drive and motor speed control which include SVPWM, motor speed surveying, motor position determining, and control algorithm for speed regulation.  Read more



No comments:

Post a Comment