Research Of New-Type Gearless Color Gravure Press Machine Based On Embedded System

Because of the features of miniaturization, low cost and flexible, embedded system have been applied in industry fields that need high reliability, flexible and real-time. With source code opening, tiny, portable, Romable and scalable feature, μC/OS-II is a fully-preemptive real-time kernel. It is fit for the real-time systems that just have limited resource. CAN bus are real-time transport protocols based on the message ID PRI. These protocols adopt the multi-host architecture based on addressing messages. CAN bus have been applied in industry field widly. This thesis proposes to develop a gearless color gravure press machine used embedded real-time system. Firstly, the paper introduces architecture and feature of embedded real-time system, especially μC/OS-II's structure and method of porting μC/OS-II to ARM core processor: S3C44B0X. Secondly, the paper analyses the theory and system requirement of color gravure press machine. Aiming at requirement of driving system and automatic register system, the paper designs an advanced gearless gravure press machine project based on embedded system. For improving real-time performance, the project uses independent servo motors that have CAN bus interface to drive the print rollers, cancels the gears, uses ARM core processor as main controller, and uses μC/OS-II as software platform. The project also uses CAN bus as the communication media between main contrllor and servo controller. The main controller finishs control arithmetic job and keeps the servo motor working synchronously to eliminate the deviation of color register. Finally, the paper discusses the hardware and software design in detail. The hardware designs include processor peripheral, CAN bus interface and man-machine interface. The software designs use of μC/OS-II's fully-preemptive feature. The designs include analysing system requirement, designing framework, tasks, include system status manage task, CAN communication task, automatic color register task, and human-machine interface task. At the same time, the paper defines the CAN application protocols through which the main controller could require the servo controller's status, cofigure the parameter and exchange the real-time running datus.