Abstract： This paper presents an embedded numerical control system of grinder，including its design of hardware and software. The controller is S3C44BOX, the operating system is ｕC/OS-II, the machining-information is transferred by USB flash disk, the motor is controlled by PWM mode, the system information is displayed by LCD displayer in the proposed system. It has many advantages such as higher control accuracy, lower cost, smaller volume etc., and meanwhile it is extended and upgraded easily . It befits the reconstruction for traditional machine tool, and also befits the development for economical numerical control system.

Keyword：numerical control system of grinder，embedded system，S3C44BOX Micro Processor Unit，ｕC/OS-II operating system，controlled by PWM mode

本文闡述了一個嵌入式磨削數控系統，包括系統硬件設計和軟件設計。該系統以S3C44BOX為控制器，以ｕC/OS-II為操作系統，以U盤進行加工信息的離線傳輸，以PWM方式進行電機控制，以LCD顯示器進行顯示，具有控制精度高，成本低，體積小,易于擴展和升級等特點，是傳統機床的數控化改造和經濟型數控機床開發的發展趨勢。

關鍵字：數控磨床；嵌入式系統；S3C44BOX微處理器；ｕC/OS-II操作系統；PWM控制
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