Magnetic rings can work with some types of sensors (e.g., Hall-effect or magnetoresistive sensors) used in robotic arms. These sensors detect the changes in the magnetic field to provide conditioned signal to the control unit.
Multi-pair magnetic rings have unique applications in the control of industrial robot arms, especially in the arm motion control of collaborative robots.
Multi-pole magnetic rings are integrated into rotary encoders and sensors to provide precise positioning feedback and speed measurement.
Compared with metal ring, multi-pole rubber magnetic rings can achieve smaller size and stable accuracy without the need for special sealing.
Key Applications:
Position detaction: In robot arms, multi-pole magnetic rings are used to detect the position of joints. Since the absolute position of the rotation angle needs to be sensed in real time, a dual-code track magnetic ring similar to the nonius system needs to be used. The ASIC calculates the absolute position of the chip through the difference between two nonius magnetic signals.
Speed Control: Magnetic rings can monitor the rotational speed of the robotic arm’s motors. By detecting the magnetic field changes between poles, the system can adjust the speed of movement, ensuring consistent and efficient operation.
Torque Control: In combination with encoders, multi-pole magnetic rings assist in torque monitoring and control. This allows robots to apply the right amount of force, critical in applications that require delicate or variable pressure, such as in pick-and-place operations.
Performance Requirements:
High Resolution: For industrial robot arms, the magnetic ring must have a high number of poles (e.g., 64, 128, or more) to achieve fine-grained feedback. The more poles present, the higher the resolution, allowing for more precise control of movements.
Durability: Since the magnetic field strength is not affected by environmental dust and oil pollution, the magnetic ring can work stably for a long time in harsh environments.
Temperature Resistance: It can work under -40℃ to 140℃
OBT Rubber Seal specializes in providing customized multi-pole magnetic rings which could work with a wide range of motion control systems.
Magnetic Ring Reference reading:
- How to choose magnetic ring for magnetic encoder?
- How to determine the number of magnetic pole pairs in a multi-pole magnetic encoder ring?
- When to Use Rubber Multi-pole Encoder Rings for Speed detaction
- How to Improve the Accuracy of Multi-pole Magnetic Ring
- Application of Multi-Pole Magnetic Rings in Robot Arms
- 2 Track Nonius Encoder Discs for High-Resolution magnetic encoder Systems
