Abstract : This paper designs a control device based on a microcontroller and a frequency converter for the transformation of a winding machine control system. The working principle of the control device is analyzed from the perspectives of control structure, hardware, and software implementation. The necessary hardware circuits and control programs are presented. Keywords : Winding machine; Microcontroller; Frequency converter; Control Currently, textile mills commonly use grooved drum winding machines, which produce a limited variety of bobbins and have a narrow application range. In actual production, a greater variety of bobbin types are required, such as radial winding, weft winding, automatic radial winding, automatic weft winding, parallel winding, and special winding, and the winding process demands accurate movements and short response times. Therefore, transforming the existing grooved drum winding machine using computer control technology to meet production needs without significantly increasing investment is a practical and feasible method. This paper focuses on an in-depth analysis of the application of a microcontroller in the spindle speed control of a winding machine. 1. Winding Machine Spindle Drive Device and Control System As shown in Figure 1, the mechanical part of the winding machine consists of a frame, a spindle motor drive belt, a tension plate, a spindle speed sensor, and a spindle disc. The frame is the main body of the entire equipment, and all devices are mounted on it. The spindle motor is a power device that drives the spindle to rotate via a drive belt, and it is one of the main components of the equipment. The tension plate adjusts the tension of the drive belt to obtain sufficient friction to drive the spindle disc to rotate. The spindle speed sensor monitors the rotation speed of the spindle at all times, allowing for real-time monitoring of the production process. The spindle disc is the device for mounting the spindles. The main task of the winding machine control system is to control the spindle drive device, realizing controls such as tube changing, automatic winding, yarn defect removal, yarn breakage stopping and braking, automatic speed change starting, and anti-overlapping control of the winding drum. The automatic winding control will be analyzed below. As shown in Figure 1, the automatic winding process is achieved by the spindle motor driving the spindle disc to rotate, while the spindle disc moves up and down according to a certain pattern under the action of a servo motor and transmission device. Taking radial winding as an example, the spindle motor determines the spindle speed of the winding machine. The required speed of the spindle varies at different stages of radial winding, necessitating control of the spindle motor speed. Generally, a frequency converter is used to control the spindle motor speed. However, due to the increasingly diverse requirements for winding methods, frequency converters alone are insufficient. Therefore, it is necessary to further utilize computer control technology to control the winding method based on the existing frequency converter control. [b][align=center]For more details, please click: Application of Microcontrollers in Winding Machine Control Systems[/align][/b]