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Say Goodbye to Battery Constraints, Positioning Never Goes Offline — ESTUN BF-Series Battery-Free Absolute Servo Motor Redefines Servo Reliability
Publish Date:Jun 1,2026
In automated production lines, motors need to transmit motion to mechanical structures through components such as reducers and ball screws. The end mechanical position often corresponds to multi-turn operation information of the motor, and the recording of multi-turn absolute positions (i.e., absolute mechanical positions) has long relied only on lithium batteries, which is in fact a helpless choice. Limited by past technical levels and cost control, the industry could only use lithium batteries to store multi-turn information when the system is powered off. Although this method can temporarily solve the position memory problem, it also brings a series of thorny issues: batteries need regular procurement and replacement, are prone to failure in restricted working environments, are subject to transportation controls that affect delivery, are not environmentally friendly, and carry leakage risks. Once signal loss or abnormality occurs, complex homing operations are also required, seriously restricting production line efficiency and system reliability.
Today, ESTUN uses its BF-series battery-free absolute servo motor, innovatively adopting passive position memory technology. Without any external energy storage components, it can achieve precise position perception, ensuring the motor grasps its own position information in real time under all working conditions, completely breaking the constraint of batteries on servo system reliability. Power on, and it knows where it is; operate, with no need for homing; production line, without downtime.
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Customer Pain Points: Battery Limitations Restrict Efficient Production Line Operation
In core scenarios such as high-speed and high-precision machining, traditional battery-equipped absolute servo motors generally have the following core pain points, seriously affecting production efficiency and equipment stability:
Battery leakage and easy failure in high and low temperature environments lead to frequent system alarms and interfere with production rhythm;
Position information is lost after equipment power-off, requiring re-homing and debugging after power-on, greatly increasing downtime;
Regular procurement and replacement of batteries not only increases operation and maintenance costs, but also consumes labor input and increases management complexity;
Batteries are dangerous goods, subject to transportation restrictions, directly affecting equipment global delivery efficiency and export progress.
These problems are solved at once by the BF series.

From relying on batteries to record positions to a battery-free absolute servo system, ESTUN's BF-series battery-free absolute servo motor uses technological innovation to solve long-term industry pain points, providing customers with a more efficient, more stable, and more worry-free positioning solution.