25BP18-Q-4-20C

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Encoders

An encoder is an electrical device that is used to provide a relative or absolute motion measurement from a mechanical driven device. The application of encoders is used for sensing angles, speeds, distances, and positions, while the working principle relies on optical, mechanical, and magnetic technology.

The 25BP18-Q-4-20C encoder is typically used in industrial applications as a non-contact rotary position sensor. It contains a patented static codewheel, which is a flat disk that contains a known pattern of transparent and opaque areas. As the wheel rotates, the patterns passing by an optointerrupter sensor creates pulses that is used for calculation of rotation count. These pulses can then be converted into a linear output signal.

The light source used in this type of encoder is composed of a transmitting LED and a receiving photoIC detector. The LED is mounted close to the optical disk while the receiving photoIC detector is placed some distance away. As the predefined transparent and opaque areas of the transparent disk passes between the LED and receiver, the emitted light from the LED will be modulated depending on the light reflected off the disk. This phenomenon creates a series of optical signals that can be detected by the receiver, thus providing an output signal proportional to the distance and angular velocity.

The 25BP18-Q-4-20C encoder provides absolute and incremental linear position feedback by processing the pulses generated from the rotating codewheel. Its output can be either in voltage or current mode and the electrical signals and mechanical design of the device meet the suitable requirements for most industrial applications.

The encoder can be used in a wide range of fields including motorised equipment, robotics, servo motor systems, automation, and motion control. Since it requires few components to operate, it can is generally low in maintenance cost and hassle, making it efficient and versatile in various industrial applications.

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