Abstract : Position servo systems, with fast and high-precision tracking as their primary objective, are one of the main control methods widely used in high-precision position control. Their drive signal is a pulse signal representing the position command. This paper introduces a high-precision position control system applied to a packaging and printing transmission system, utilizing the pulse counting and pulse output functions of the high-performance data acquisition card PCL-718 and the pulse position control function of the fully digital frequency converter MSD series. The hardware and software development were also implemented. Keywords : Packaging and printing transmission, industrial computer, variable frequency speed regulation, position control system 1 Introduction In China, microcomputer control is widely used in packaging and printing transmission control systems. This type of control system has advantages such as small size, high reliability, and good economy, but it also has disadvantages such as large interference and difficulty in calibration at startup. The fully digital AC-DC-AC frequency converter servo driver MSD0421A has a pulse position control function. It uses the number of pulses to represent the position magnitude, thus possessing the characteristics of high control accuracy, fast response speed, and strong anti-interference ability. Using it as an actuator in conjunction with the intelligent data acquisition card PCL-718 to form a closed-loop position controller for application on packaging lines is of great significance. It can solve many problems in packaging printing, such as the difficulty of initial positioning by manual methods, large positioning errors, slow dynamic adjustment, easy misalignment during transmission, and difficulty in color registration. 2 Automatic Color Registration Principle in Packaging Printing There are many reasons for registration errors, such as inflexible parallelism of guide rollers and pressure rollers, poor motion balance, tension fluctuations, uneven ink thickness, ink thermal deformation, and diameter errors of printing plate rollers. These registration deviations are continuously changing in nature, and the difference is not quantitative. Therefore, it is necessary to constantly monitor the registration error and correct it in a timely manner. In manual color registration, the printer usually observes the registration error with the naked eye and manually adjusts the movement of the correction roller based on experience to compensate for the registration error, thus greatly limiting the printing speed and color registration accuracy. Using an automatic color registration system can improve both printing speed and color registration accuracy, making it absolutely necessary. [b][align=center]For more details, please click: Packaging Printing Transmission Position Control System Based on Frequency Converter and Data Acquisition System[/align][/b]