In industrial automation systems, servo motors serve as the core components of execution units, and their proper selection directly impacts the overall performance and service life of the equipment. However, many engineers often fall into pitfalls during actual selection, leading to difficulties in equipment debugging, slow response, and even frequent failures. In fact, by grasping a few key points, the success rate of selection can be significantly improved.

Pitfall 1: Focusing Only on Power and Speed, Ignoring Torque and Inertia Matching  

Many people are accustomed to first looking at motor power and rated speed during selection, believing that "high power" can solve all problems. In reality, the motor's output torque and load inertia matching are the core factors determining the system's dynamic performance.  

Rated torque needs to comprehensively consider load torque and acceleration torque, with an appropriate safety factor reserved. Especially in applications with frequent start-stop cycles and high-precision positioning, insufficient torque can cause motor overload and lost steps, while excessive torque leads to energy waste and increased costs. Additionally, inertia matching is often overlooked—when load inertia is too large, motor response lags, positioning accuracy decreases, and it may even cause mechanical vibration. It is generally recommended that in high dynamic response systems, load inertia should not exceed 10 times the motor inertia; for ordinary point-to-point motion, it can be relaxed to within 30 times.

Pitfall 2: Neglecting the Impact of Transmission Mechanisms on System Inertia  

Servo motors are rarely used alone; they are usually paired with transmission mechanisms such as ball screws, synchronous belts, gear racks, etc. Different transmission methods have varying impacts on the overall system inertia. For example, long ball screws, due to their own large rotational inertia, can easily cause a high system inertia ratio; while synchronous belt drives require consideration of the inertia changes brought by belt tension and length.  

During selection, based on the specific transmission form, the load inertia converted to the motor shaft should be reasonably estimated, and matching should be done with reference to industry experience values. For instance, the recommended inertia ratio for ball screws is between 2~10, and for gear racks, it is between 1~8. Flexible adjustment is necessary to achieve smooth operation.

Pitfall 3: Blindly Pursuing High Configuration, Ignoring Actual Process Requirements  

Some engineers tend to choose "over-spec" servo motors, believing that the more high-end models are safer. However, in situations without high-speed or high-precision requirements, excessive configuration not only increases costs but may also complicate debugging due to complex parameters.  

The correct approach is to return to the equipment process itself: clarify whether it is speed control, position control, or torque control? Is frequent forward and reverse rotation required? What is the work cycle? Only by combining actual motion curves and load characteristics can the most cost-effective motor model be selected.

Servo motor selection should not merely involve simple parameter comparisons. Only by stepping out of the three major pitfalls—"emphasizing power over torque," "neglecting transmission impact," and "blindly pursuing high configuration"—can the high precision and high response advantages of servo systems be fully utilized, enabling automated equipment to operate stably and efficiently.

Bonve always adheres to the philosophy of "Wholeheartedly Making Good Rotor Pumps," committed to providing global customers with customized conveying and mixing solutions. If you have technical inquiries, selection needs, case references, or other cooperation intentions related to Bonve rotor pumps, please feel free to contact us.  

Service Hotline: 0574-87588986 13586591794  

Official Website: www.bvpumps.com  

Business Email: market@bonvepumps.com  

We look forward to working with you to drive efficiency and innovation in industrial fluid transmission with precision technology.

Bonve always adheres to the philosophy of "Wholeheartedly Making Good Rotor Pumps," committed to providing global customers with customized conveying and mixing solutions. If you have technical inquiries, selection needs, case references, or other cooperation intentions related to Bonve rotor pumps, please feel free to contact us.  

Service Hotline: 0574-87588986 13586591794  

Official Website: www.bvpumps.com  

Business Email: market@bonvepumps.com  

We look forward to working with you to drive efficiency and innovation in industrial fluid transmission with precision technology.