DP11SVN20B25S

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Encoders

Encoders are type of device used to electronically measure the rotation of a shaft and odometer counts. An encoder typically consists of an array of infrared light emitting diodes (LEDs) and light detectors, housed in a sealed protective enclosure. When these LEDs and detectors interact with a specially coded mark known as an encoder disc on the shaft, the device measures the angle and direction of the shaft’s rotational motion.

DP11SVN20B25S is one such encoder designed specifically for applications under challenging conditions. It uses a sealed and robust construction for robustness. It uses a single, 10-bit differential incremental encoder, designed to measure the angular displacement of a rotary shaft up to 20 revolutions. The device reports its measurements in Quadrature pulse width modulation. It also has max speed capabilities of up to 300 rpm.

Application Field

The DP11SVN20B25S is widely used for applications such as robotic arms, industrial demanding-conditions, Delta PLCs, and high-precision industrial applications due to its robust construction and high accuracy.

Robotic arms benefit from the device\'s capability of providing accurate positional and torque readings, as well as its ability to stand up to tough and demanding robot applications. Delta PLCs, a hard real-time control system with strict specifications, can also rely on DP11SVN20B25S for accuracy and reliability. Last but not least, due to the robust construction, the device is suitable for long-term usage in outdoor and high-precision industrial settings.

Working Principle

The working principle of the DP11SVN20B25S is fairly straightforward. It starts with the incremental encoder, which uses a simple counting sequence to measure the angular displacement of the shaft. The encoder disc is placed on the motor shaft, such that it passes through a gap between one set of infrared LED and photodetector located in the encoder’s mounting body. As the disc rotates, the codes on it cause the light from the LED to pass over the photodetector array and activate cells in the same periodic order every revolution. This produces a pulse-width-modulated (PWM) output signal, which is then decoded by the encoder’s on-board logic to acquire the angular position of the shaft.

The DP11SVN20B25S is designed to take measurements up to 20 revolutions. This is known as the encoder’s resolution. Since the encoder is used for measuring angular displacement, the encoder’s resolution is usually expressed in terms of the number of circuits (or counts) per each revolution. This means that the DP11SVN20B25S has a resolution of 1024 counts per revolution (CPR). The decoded output signal can be input to a microcontroller to be interpreted and processed.

The device also includes a zero-alignment switch in the encoder’s mounting body which enables the user to also align the index. Aligning the index to a known location is usually required in applications such as automated robotic arms or automated assembly systems.

Conclusion

The DP11SVN20B25S is a reliable and accurate encoder designed for use under tough and demanding conditions. The device features robust construction, a single 10-bit differential incremental encoder, and max speed capabilities up to 300 rpm. Its main application areas include robotic arms, Delta PLCs and high-precision industrial applications. The encoder’s working principle is based on a simple sequence of light pulse on a photodetector array, which is decoded to acquire the angular position of the shaft. The encoder also includes a convenient zero-alignment switch in its mounting body, making it suitable for applications such as robotic arms or automated assembly systems.

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