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How Full Closed-loop Control Improves Machine Stability? How Full Closed-loop Control Improves Machine Stability? 1. About VEIKONG Brand Strength As a reputable high-tech enterprise, VEIKONG focuses on the research, manufacturing and system solution supply of medium and low voltage inverters and spindle servo drives. Boasting a professional R&D team and over 12 years of industry management experience, VEIKONG ranks among the earliest independent AC drive brands in China. By adopting advanced SPWM, sensorless vector and torque control technologies, our products reach international advanced standards and can fully replace European, American and Japanese brands. Strictly following ISO9001 quality management and certified by CE and IEC, VEIKONG consistently delivers reliable, cost-effective drive products for global industrial applications. 2. The Importance of Full Closed-loop Control in CNC Machining Full closed-loop control has become an indispensable core technology in high-end CNC machining, directly determining machine running stability, workpiece dimensional consistency and long-term processing accuracy. Many users only focus on spindle speed and power, but ignore the decisive role of closed-loop mode in eliminating mechanical errors. Understanding how full closed-loop control works helps machine manufacturers and end users optimize equipment configuration and avoid precision attenuation during long-term operation. 3. Working Principle of Full Closed-loop Control Different from conventional semi-closed-loop control that only collects feedback signals from the motor end, full closed-loop control adds an independent spindle encoder for real-time position detection. It forms a double feedback loop covering the motor side and the mechanical spindle side. The drive continuously compares the command position with the actual spindle position, dynamically compensating deviation values in real time. This working principle can effectively offset inherent mechanical errors, including transmission gear clearance, lead screw deformation, belt slip and structural aging deflection. These subtle errors cannot be eliminated by semi-closed loop alone and will directly affect finished workpiece quality in precision machining. 4. Application Value of Full Closed-loop Under Complex Working Conditions In actual CNC workshop operation, machine tools face complex working conditions such as heavy cutting impact, long-time continuous operation and temperature rise deformation. Without full closed-loop correction, positioning deviation will gradually accumulate, resulting in poor repeatability, unqualified dimensional tolerance and obvious surface pattern marks. Full closed-loop control suppresses such error accumulation all the time, maintaining stable positioning accuracy even under variable load and temperature changing environments. It is particularly suitable for machining centers, CNC boring machines, gantry machine tools and high-precision lathes that require long-term batch production. 5. VEIKONG S6 Perfectly Matches Full Closed-loop Control Demand Tailored for high-precision CNC scenarios, VEIKONG S6 Series Spindle-specific Servo Drive perfectly empowers full closed-loop control. It supports both semi-closed and full closed-loop position control, achieving positioning accuracy up to ±1 pulse. Compatible with TTL differential, Tamagawa absolute, SinCos, SSI and BISS protocols, S6 allows arbitrary encoder frequency division output. The separated motor and spindle encoder interfaces simplify wiring and maintenance, while strong anti-electromagnetic interference avoids pulse loss and ensures feedback stability. 6. Core Performance Advantages of VEIKONG S6 Servo Drive With powerful motor self-learning, 150% overload for 60 seconds and 200% instantaneous overload capacity, VEIKONG S6 maintains precise position locking under sudden heavy cutting. It offers analog pulse, EtherCAT and M3 bus interfaces to match mainstream CNC systems, covering 2.2kW–11kW at 220V and 380V for both asynchronous and permanent magnet synchronous motors. 7. Conclusion: VEIKONG S6 Ideal Full Closed-loop Spindle Solution Relying on over 20 years of drive technology accumulation, strict ISO9001 quality system and international CE&IEC certification, VEIKONG deeply understands the pain points of CNC spindle stability. The S6 Series integrates mature full closed-loop algorithm, rich encoder compatibility and reliable hardware design, effectively improving machine running stability, reducing mechanical error interference and ensuring long-term consistent precision. For high-precision machining and stable mass production, VEIKONG S6 is the ideal full closed-loop spindle servo solution.
2026-05-24 01:16:07 More >
20ms Ultra-fast Response! Pressure Control Principle of VEIKONG VFD550I Servo System 20ms Ultra-fast Response! Pressure Control Principle of VEIKONG VFD550I Servo System In modern industrial hydraulic applications, especially in injection molding, die-casting, hydraulic presses and metal balers, system response speed and pressure stability directly determine production efficiency, product qualification rate and energy consumption. Shenzhen VEIKONG Electric, with more than 12 years of drive technology accumulation, has launched the VFD550I series electro-hydraulic servo drive, which achieves a 20ms ultra-fast pressure response through independently developed control algorithms and optimized structural design. This paper will interpret the pressure control principle of VFD550I in detail based on actual working conditions and technical parameters.   What Is 20ms Ultra-fast Response The response time of a conventional hydraulic system is usually at the 100–300ms level, which leads to lag in pressure building, unstable flow and poor consistency of products. VEIKONG VFD550I shortens the pressure response time to 20ms, reaching millisecond-level closed-loop control. This means that after the system sends a pressure command, the drive can complete torque output, motor speed adjustment and oil pressure stabilization in an extremely short time, realizing “instruction arrives, pressure follows”. This index is verified under actual working conditions: pressure overshoot ≤ ±1%, steady-state pressure fluctuation ≤ ±0.5Bar. It fundamentally solves the problems of slow response, pressure overshoot and unstable molding in traditional hydraulic systems.   Core Control Principle of VFD550I Closed-loop Pressure Control Algorithm The VFD550I adopts a high-precision closed-loop pressure control algorithm independently developed by VEIKONG. The algorithm collects real-time pressure signals from the oil pressure sensor, compares them with the target pressure set by the host computer, and quickly adjusts the output frequency and torque of the servo motor through high-speed calculation.   The whole closed-loop process includes: · Real-time sampling of pressure signals · High-speed error calculation and compensation · Dynamic adjustment of motor speed and torque · Fast suppression of pressure overshoot and oscillation This set of algorithms ensures that the system pressure is always kept within the target range, even under variable load conditions.   High-speed Torque Output of PMSM The VFD550I is matched with the MFD series AC permanent magnet synchronous servo motor, which has the characteristics of low inertia, high torque density and fast dynamic response. The motor can reach rated torque in a short time, providing strong power support for 20ms pressure response. Compared with asynchronous motors, the MFD motor has 15% lower peak current and 20% higher power density, which greatly improves the response speed and control accuracy of the whole system.   Multi-pump Synchronization & CAN Bus Collaboration For large hydraulic systems, VFD550I supports multi-pump confluence and diversion control based on CAN bus communication. The master-slave drives realize real-time data interaction, pressure command synchronization and flow coordinated distribution. This structure ensures that multiple pumps can act synchronously or separately, further shortening the pressure building time and improving the overall response speed of the system.   Technical Parameters Supporting Ultra-fast Response · Pressure response: 20ms · Pressure overshoot: ≤ ±1% · Steady-state pressure fluctuation: ≤ ±0.5Bar · Overload capacity: 150% rated current for 60s; 180% for 10s · Control modes: Sensorless vector (SVC), closed-loop vector (VC) · Communication: MODBUS, CANopen These parameters ensure that the VFD550I can maintain stable and fast response under long-term continuous operation and heavy load impact.   Application Benefits of 20ms Ultra-fast Response   Higher Production Efficiency Millisecond-level response shortens the molding cycle, and the overall efficiency of injection molding and die-casting equipment is increased by more than 10%.   More Stable Product Quality Pressure stability ensures consistent product size and density. Positioning accuracy can reach 0.1mm, significantly reducing the defective rate.   Better Energy-saving Effect Fast and accurate pressure control reduces no-load flow loss and invalid energy consumption. The actual power saving rate can reach 20%–60%.   Conclusion VEIKONG VFD550I electro-hydraulic servo system achieves 20ms ultra-fast pressure response through advanced closed-loop algorithm, high-performance permanent magnet synchronous motor and reliable bus communication technology. It perfectly meets the high-precision and high-efficiency needs of modern hydraulic equipment. As a professional provider of electro-hydraulic servo solutions, VEIKONG will continue to invest in R&D and provide more stable, efficient and energy-saving products for global industrial customers.   Related words: Electro-hydraulic servo drive High-precision hydraulic control Industrial hydraulic systems
2026-05-11 18:46:52 More >
From Injection Molding Machines to Hydraulic Balers: What Other Equipment Can Electro-Hydraulic Servo Drives Be Used On? From Injection Molding Machines to Hydraulic Balers: What Other Equipment Can Electro-Hydraulic Servo Drives Be Used On? 1. Core Positioning of Electro-Hydraulic Servo Drives   The VEIKONG VFD550I series electro-hydraulic servo drive is a professional product specifically developed for hydraulic control applications. According to the product brochure, this system consists of the VFD550I drive and the MFD series AC permanent magnet synchronous servo motor, offering core advantages such as ultra-quiet operation, over 30% energy savings, and millisecond-level pressure response. Although many people associate electro-hydraulic servo drives exclusively with injection molding machines, their application range extends far beyond this single equipment type.    2. Injection Molding Machines: The Most Mature Application   Injection molding machines represent the most common application for electro-hydraulic servo drives. According to customer cases in the brochure, the VFD550I has achieved significant results in injection molding machine retrofit projects. By replacing hardware with excellent electro-hydraulic servo control software, system response speed is accelerated, mold opening and closing accuracy is ensured, and injection end position accuracy reaches 0.1mm. The high-precision, high-response PID algorithm module makes system pressure very stable, with pressure control overshoot less than or equal to ±1% and steady-state fluctuation less than or equal to ±0.5 Bar, effectively improving plastic product molding quality. Additionally, high-speed field weakening control and high response speed increase overall machine efficiency by 10%, with year-on-year power saving reaching 35%.    3. Die-Casting Machines: A Typical Application for Multi-Pump Confluence and Diversion   Die-casting machines represent another important application area for electro-hydraulic servo drives. According to the brochure, the VFD550I series can achieve multi-pump confluence and diversion switching functions, allowing either confluent operation for the same action or diversion to complete different actions. The die-casting machine multi-pump confluence and diversion application case in the brochure shows that compared with simple multi-pump confluence systems, this system offers faster response, can complete more than two independent action processes simultaneously, significantly shortens product molding cycles, allows certain actions to be completed separately, greatly saves production time, improves production efficiency, and achieves greater energy savings.    4. Hydraulic Balers: Dual Improvement in Energy Savings and Efficiency   Hydraulic balers represent another successful application scenario for the VFD550I electro-hydraulic servo drive. According to the metal hydraulic baler application solution in the brochure, the solution using the VFD550I electro-hydraulic servo drive paired with a permanent magnet synchronous servo motor saves 20% to 60% of electricity compared with traditional hydraulic baler control solutions. The excellent control algorithm of the VFD550I hydraulic servo drive ensures that system speed follows response quickly and stably, guaranteeing accuracy of system oil pressure changes and fast, efficient single cycles during hydraulic baler operation. In this application, system single-cycle time was reduced to 96 seconds. Excellent overload capacity ensures safe and stable operation of the hydraulic baler even under extreme load conditions.    5. Hydraulic Stations: Measured Power Saving Exceeding 50%   Hydraulic stations are core components of industrial hydraulic systems and an important application area for electro-hydraulic servo drives. According to the hydraulic station application solution in the brochure, a project conducted before-and-after comparison measurements using a meter, achieving a power saving rate of 51.2% after the retrofit was completed. After completing the first phase of retrofitting 29 hydraulic stations, two subsequent phases of retrofitting were carried out. This case fully demonstrates the energy-saving value and reliability of the VFD550I electro-hydraulic servo system in large-scale hydraulic station retrofit projects.    6. Metal Hydraulic Balers and Presses   Beyond the equipment mentioned above, the VFD550I can also be applied to metal hydraulic balers, presses, and other equipment. According to the press application solution in the brochure, customers require fast response and stable pressure to ensure product quality consistency, while also achieving high efficiency and energy savings. The VFD550I achieves pressure flow response time as fast as 20ms and displacement accuracy less than 0.1mm, enabling the press to move when commanded, stop when commanded, and position precisely. At the same time, products produced have high consistency, greatly reducing the defect rate.    7. Conclusion: Broad Applicability Across Hydraulic Equipment   From injection molding machines to die-casting machines, from hydraulic balers to hydraulic stations and metal presses, the VEIKONG VFD550I series electro-hydraulic servo drive, with its dual-motor compatibility, multi-pump confluence and diversion control, millisecond-level pressure response, and excellent overload capacity, is widely applicable to various types of hydraulic equipment. Whether you need to retrofit an existing injection molding machine or seek a drive solution for a hydraulic baler or die-casting machine, the VFD550I delivers efficient, stable, and energy-saving solutions. VEIKONG will continue to serve global hydraulic equipment users with professional technology.   Related words: VFD550I series electro-hydraulic servo drive 20ms response time
2026-04-26 21:43:58 More >
Permanent Magnet Synchronous Motor vs Asynchronous Motor: How to Choose for Electro-Hydraulic Servo Systems? Permanent Magnet Synchronous Motor vs Asynchronous Motor: How to Choose for Electro-Hydraulic Servo Systems? 1. Motor Selection Is Key to Electro-Hydraulic Servo Systems   In electro-hydraulic servo systems, motor selection directly affects energy efficiency, response speed, and operational stability. The VEIKONG VFD550I series electro-hydraulic servo drive features dual-motor compatibility. According to the product brochure, this series can seamlessly drive both permanent magnet synchronous motors and asynchronous motors. So how should users make their choice in practical applications? This article analyzes the question from both technical characteristics and application scenarios.    2. Core Advantages of Permanent Magnet Synchronous Motors   The MFD series AC permanent magnet synchronous servo motor, which pairs with the VFD550I series, is specifically developed by VEIKONG for hydraulic control applications. According to the brochure, this motor offers several technical advantages.   First, higher power density. Compared with conventional motors, the power density of permanent magnet synchronous motors increases by more than 20%, with smaller size and more compact structure, making them suitable for installation scenarios with limited space.   Second, advanced thermal management. The motor uses a one-piece molded housing with a maximum temperature rise controlled within 50°C, providing excellent heat dissipation and low temperature rise.   Third, reluctance torque optimization. Under the same torque output, current consumption of permanent magnet synchronous motors is reduced by 15%, resulting in smaller losses for both the motor and controller, significantly improving system efficiency.   Fourth, fast response characteristics. When paired with the VFD5501 drive, permanent magnet synchronous motors achieve system latency of 20ms, with rapid pressure response and flow stabilization time not exceeding 50ms.    3. Application Scenarios for Asynchronous Motors   Asynchronous motors, as traditional AC motor types, still have wide applications in some retrofit projects. According to the brochure, the VFD550I series also supports asynchronous motor drive. The advantage of asynchronous motors lies in their relatively lower cost. In many old equipment retrofit projects, users may wish to keep the original motor to reduce transformation costs. Additionally, asynchronous motor control technology is mature with well-established maintenance systems. For application scenarios that do not require particularly high response speed, asynchronous motors remain an economically viable choice.    4. Energy Saving Differences Between the Two Motor Types   Energy saving is one of the core values of electro-hydraulic servo systems. According to actual application cases in the brochure, the solution using the VFD550I electro-hydraulic servo system paired with permanent magnet synchronous motors saves 20% to 60% of electricity compared with traditional hydraulic systems. In one hydraulic station retrofit project, the measured power saving rate reached 51.2%. In a metal hydraulic baler application, the system single-cycle time was reduced to 96 seconds while achieving 20% to 60% power savings. Although asynchronous motors can also achieve some energy savings, their efficiency under low-speed, high-torque conditions is not as good as that of permanent magnet synchronous motors.    5. Comparison of Control Precision and Response Speed   For high-precision hydraulic equipment such as injection molding machines and die-casting machines, control precision is a key indicator. According to the brochure, when the VFD550I is paired with a permanent magnet synchronous motor, pressure control overshoot is less than or equal to ±1%, steady-state fluctuation is less than or equal to ±0.5 Bar, and pressure response is completed within 20ms. Displacement accuracy reaches 0.1mm. These indicators ensure the stability and consistency of injection molded product quality. Asynchronous motors under V/F control and open-loop vector control can also meet general precision requirements, but they are slightly inferior to permanent magnet synchronous motors in low-speed performance and dynamic response.    6. VFD550I Dual-Motor Compatible Design   VEIKONG has fully considered the needs of different users. According to the technical specifications in the brochure, the VFD550I series supports three control modes: V/F control, sensorless flux vector control without PG card, and sensor speed flux vector control with PG card. This flexible control mode selection allows the same drive to either drive permanent magnet synchronous motors for high-performance operation or drive asynchronous motors to meet basic application needs. Users can choose the most appropriate motor type based on actual project budget and performance requirements.    7. Conclusion: How to Make Your Choice   In summary, the choice between permanent magnet synchronous motors and asynchronous motors should be based on the following factors. If the project pursues high energy efficiency, fast response, and high-precision control, permanent magnet synchronous motors are the better choice, especially suitable for equipment such as injection molding machines, die-casting machines, and hydraulic balers. If the project budget is limited and requirements for response speed and energy savings are not high, asynchronous motors can serve as an economical alternative. The dual-motor compatible design of the VEIKONG VFD550I series electro-hydraulic servo drive provides users with flexible selection options. Whichever motor you choose, you will obtain stable and reliable drive control.   Related words: VFD550I series electro-hydraulic servo drive 20ms response time
2026-04-26 21:41:17 More >
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