Application of High Precision Rotary Encoder in Servo Feedback Positioning System

Abstract: The application information of high-precision rotary encoder in servo feedback positioning system is provided by excellent flowmeter and flowmeter manufacturers. It's basically a dual-brush quadrature boundless potentiometer. It has a full-circle ring of resistive material, powered at both ends, on which two electrically independent brushes move. The two brushes are mechanically connected at 90 angles to each other. Rotary encoders are often used with servos. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the application article details of high-precision rotary encoders in servo feedback positioning systems. It's basically a dual-brush quadrature boundless potentiometer. It has a full-circle ring of resistive material, powered at both ends, on which two electrically independent brushes move. The distance between the two brushes is 90°Mechanical connection of corners. Rotary encoders are often used in positioning systems with servo feedback, where the cost of the encoder is generally not critical. But encoders are also used to encode knob positions on some user interfaces, such as volume knobs on audio systems. For these knobs, potentiometers can be selected for low cost, high accuracy, and absolute readings, but they have limited travel, typically less than 340°, or opto-mechanical rotary encoder, which has no limit on its travel, but is expensive, has low precision, and only has relative reading values. This Design Idea attempts to combine the two, combining the advantages of a potentiometer with the borderless operation of an optomechanical rotary encoder. The encoder adopts the construction technology of standard potentiometer, so it is easy to produce. It's basically a dual-brush quadrature boundless potentiometer. It has a full-circle ring of resistive material, powered at both ends, on which two electrically independent brushes move. The distance between the two brushes is 90°Mechanical connection of the corners (Fig. 1). The ADC in the microcontroller reads out two signals that the firmware uses to determine which quadrant the axis is in. Once the quadrants are known, the position of the shaft can be calculated using the signals from the two brushes. When the wiper reaches the power connection, this signal should be ignored due to the nonlinear response (Figure 2). 90 between the two brushes°angle, so it is not possible to be in a non-linear position at the same time. Today, even the most basic microcontrollers have a 10-bit ADC, so the two signals combined have 11-bit resolution, or better than 0.2°. The microcontroller can ignore it if the application does not require absolute readings, or when using a software reset. This quadrature endless potentiometer provides an experience similar to the old-fashioned tuning knobs on classic analog radios. It provides new possibilities for human-machine interface design, which can make consumer products noble at low cost. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Application of High Precision Rotary Encoder in Servo Feedback Positioning System'

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