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E-Motion Newsletter Upgrading to a Closed-Loop Stepper Motor of SANYO DENKI’s closed-loop stepping system, March 2025
 The Challenge: Step Loss in High-Load ApplicationsIn the semiconductor industry, precision is crucial for maintaining product quality. A prominent semiconductor manufacturer faced recurring motion control challenges in their Automated Optical Inspection (AOI) Systems using an open-loop stepper motor system. These challenges were mainly caused by step loss under varying load conditions, resulting in:
As production speeds increased, the company needed a solution that would provide stable motion control and improve production efficiency without requiring a full upgrade to more complex systems.  The Solution: Closed-Loop Stepper Motor System The key features that made SANMOTION PB the ideal choice included: 1. Closed-Loop Feedback to Prevent Step Loss The SANMOTION PB system uses an integrated closed-loop feedback mechanism that continuously monitors and adjusts motor performance in real time. This system eliminates step loss, ensuring accurate positioning, even in environments with fluctuating loads. 2. High Torque at High Speeds The SANMOTION PB motor maintains consistent torque even at high speeds, allowing for faster inspection without sacrificing precision. This was a significant improvement compared to traditional stepper motors, which tend to lose torque at higher speeds. 3. Cost-Effective Performance Boost The manufacturer was able to improve the motion control system’s efficiency without committing to a full system upgrade, making SANMOTION PB a more cost-effective solution. It offered high precision and stability while being more affordable than other high-end systems. 4. Seamless Integration with EtherCAT The SANMOTION PB system integrates seamlessly with EtherCAT and other automation systems, allowing for real-time monitoring, remote adjustments, and simplified maintenance. Its EtherCAT compatibility ensured smooth communication with existing factory automation systems, optimizing the overall production line. The Results: Increased Efficiency and AccuracyAfter switching to SANMOTION Model No. PB, the manufacturer saw a remarkable improvement in the performance of their Automated Optical Inspection (AOI) Systems:
With SANMOTION Model No. PB, the company was able to enhance production efficiency and maintain the high precision required for semiconductor manufacturing. SANMOTION F2 and SANMOTION PBFor simpler motion tasks, SANMOTION F2, the open-loop stepper system, remains a cost-effective option; For high-precision industries, SANMOTION Model No. PB is the key to efficiency, reliability, and superior control. For more information, please contact us
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