介紹了一種基于虛擬儀器的多軸步進電機控制系統。硬件采用基于PC 的NIPCI7354 運動控制卡產生脈沖和方向信號、NIPCI7604 對信號驅動放大；軟件采用LABVIEW 7 圖形化編程軟件設計操作界面和控制程序，通過調用控制卡中的運動函數庫，可以動態改變脈沖頻率和方向信號，控制電機的轉速和轉向，從而實現了在開環控制狀態下同時對不同軸步進電機的控制。既提高了實時性和快速性，又方便實用。
關鍵詞：虛擬儀器；運動控制；步進電機；
Abstract：This paper introduced a kind of Multi –Axis Stepper Motor control system based on Virtual Instrument .The system controls speed and direction of Stepper motor ,through generating signal of pulse and direction by motion controlling card based on PC of NIPCI7354 and driving signal by NIPCI7604 ;operating screen program and controlling program designed by using Graphed program language of LabVIEW 7, through calling motion function library in motion controlling card , then performed controls of Stepper Motor of different-axis,s in open loop. It is not only in rising motion,S real-time and speeding, but also in using convernience.
Keybords: Virtual Instrument; Motion Control;Stepper Motor