High Efficiency Application of Zhongda Automation Program on Cylindrical Grinder

**Abstract:** This article introduces the Delta B series servo system, VE series inverter, and the Zhongda Universal CNC system, focusing on their application in cylindrical grinding machines. By leveraging the high openness of the Zhongda Universal CNC System, it enables technological innovation that differs from traditional intuitive input methods used in other CNC machine tools. This enhances ease of operation and significantly improves productivity. **Keywords:** servo, universal CNC system, cylindrical grinder, high openness, intuitive input **1. Introduction** Cylindrical grinders are essential in machining the outer surfaces of workpieces, ensuring precise dimensions and smooth finishes. These machines require high precision and consistency in processing, making them ideal for advanced control systems. The Zhongda Universal CNC System offers a highly open platform, allowing for flexible customization and efficient operation. The system features an open display screen, internal PLC, I/O planning, and parameter configuration, all of which can be tailored to specific needs. This openness allows operators to input fixed processing data intuitively without modifying G-code programs, simplifying the workflow and increasing efficiency. **2. Working Principle of Cylindrical Grinders** Cylindrical grinders typically use two servo axes (X and Y) to control the movement of the workpiece and grinding wheel. The workpiece rotates while the grinding wheel spins, with their rotational axes parallel to the X-axis but moving in opposite directions. The friction between the grinding wheel and the workpiece surface achieves the desired shape and size. The X and Y axes’ movements adjust the diameter and geometry of the workpiece. Traditional cylindrical grinders often rely on hydraulic systems for Y-axis control, which limits flexibility. With CNC integration, the Y-axis becomes more controllable in terms of position and speed, and the NC program can automatically dress the grinding wheel, expanding the range of machinable parts. **3. CNC External Cylindrical Grinding Machine Solution Based on Delta’s Automation Platform** Each machine tool has unique mechanical and electrical design requirements, and the openness of the Zhongda Universal CNC System ensures compatibility with various configurations. Leveraging Delta’s full range of automation products, Zhongda provides cost-effective, simple, and efficient solutions for machine tool builders and end users. The integrated solution includes the Zhongda PUTNC-H4C-2 CNC system, Delta ASDA-B servo system, and VE Series inverter. This combination not only meets the demands of high-precision machining but also enhances user satisfaction by delivering improved performance and reliability. **3.1 Technical Features of the PUTNC-H4C-2 CNC System** The PUTNC-H4C-2 CNC system is designed for flexibility and ease of use. It supports up to three servo axes (X, Y, A), includes an embedded PLC, and allows users to customize the interface and functions. Key features include: - Open system architecture - High-definition LCD display - Support for 3 servo axes - Customizable PLC functions - Standard and optional I/O expansion This system provides a user-friendly interface for workpiece selection, setup, and wheel dressing, as shown in Figures 1–5. **3.2 MCM Parameter Modification** Various parameters can be adjusted to optimize machine performance, such as backlash compensation, feed rates, motor direction, and software over-travel limits. These settings ensure accurate and stable operation, especially for complex machining tasks. **3.3 Processing Variable Definition** Custom variables can be defined to suit different machining scenarios, enhancing the adaptability of the system. **3.4 NC Program Example** An example of a new wheel dressing program is provided, along with a machining program for a workpiece with an arc-shaped profile. These programs demonstrate how the system handles complex geometries using G-code commands like G00, G01, G02, G03, and G41/G42 for tool radius compensation. **4. Delta Servo System and Frequency Converter** **4.1 ASDA-A Series AC Servo System** The ASDA-A series AC servo system, introduced in 2003, and the ASDA-B series, launched in 2005, are widely used in CNC applications. Key features include: - Three basic control modes (position, speed, torque) - Fast dynamic response (1 ms setting time) - PDFF robust control architecture - Automatic gain adjustment - Resonance suppression and low-pass filtering - Indexing positioning function for tool magazine control **4.2 VFD-VE Series Vector Control AC Drive** Launched in 2007, the VFD-VE series is designed for high-speed spindle control. It supports frequency outputs up to 3600Hz and offers precise speed control, low-speed torque, and motor protection features. Its position control function allows for indexed spindle rotation, making it ideal for precision machining. **5. Conclusion** With the rapid development of the manufacturing industry, automation plays a vital role in improving efficiency and quality. The Zhongda Universal CNC System, with its high openness and stability, offers great potential for specialized machining applications. When combined with Delta’s servo systems, inverters, and other automation components, it delivers a comprehensive solution that enhances both machine reliability and product quality. This integration leads to significant improvements in machining accuracy, productivity, and customer satisfaction.

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