Absolute Single-Turn and Multi-Turn Hollow Magnetic Encoder

Structural Design Advantages

• Hollow Shaft Structure: The hollow shaft of the hollow shaft magnetic encoder allows for the passage of objects, cables, liquids, or optical fibers through the center axis without affecting the measurement. This design makes it very convenient for applications where it is necessary to transmit other signals or substances through the rotating shaft, such as in situations where power and signals need to be transmitted simultaneously, or in equipment where liquid cooling is required through the center of the shaft.
• Compact and Flexible: The encoder is small in size, light in weight, and compact in structure, allowing it to be integrated into applications with limited space. This compact design enables it to adapt to various occasions with strict space requirements, facilitating installation and integration into different types of machinery.

Performance Advantages

• High Precision and High Resolution: It can provide high-precision angular measurement and high-resolution position feedback. For example, some hollow shaft magnetic encoders can offer up to 20 bits of angular resolution, meeting the demands for high-precision positioning and control.
• Strong Resistance to Interference: By using magnetic-sensitive elements and magnetic rings to complete angle detection, it has a strong tolerance for environmental factors such as dust, oil, and moisture. In harsh industrial environments, such as those with a lot of dust or high humidity, it can still maintain stable performance.
• Fast Response: The signal transmission speed is fast, enabling it to quickly respond to changes in the rotational speed and direction of the measured shaft, making it suitable for high-speed motion control systems.
• Absolute Function: After power-up or in the event of internal or external power failure, it does not require a reference drive. The accurate position can be obtained immediately upon normal power supply. This means that in various adverse environmental interferences, the original position test data of the encoder can still operate stably and is not easily affected by interference.

Application Advantages

• Multi-axis Synchronous Control: It can provide an incremental pulse code value for each axis position. In position control, counting is not required, and direct internal high-speed reading and external output can be achieved. This makes the hollow shaft magnetic encoder perform well in applications such as industrial robots with multi-axis parallel operation and multi-axis synchronous control fields, enabling high-speed multi-axis parallel synchronous operation.
• No Need for Homing at Startup: During operation, it outputs based on the rotational displacement of the shaft. By combining with the shaft through a coupling, it can directly detect the rotational displacement. Typically, there is no need for homing at startup. Under normal circumstances, the rotational angle can be output as an absolute value in parallel.

Installation and Maintenance Advantages

• Easy Installation: The clamping method and spring washer structure make it very easy to adjust the position and absorb the vibration and impact of the load. This design not only simplifies the installation process but also improves the stability and reliability of the encoder during operation.
• Simple Maintenance: Due to its compact structure and rational design, maintenance is relatively simple, reducing maintenance costs and time.