What are the principles and methods of use of rotary incremental encoders

What are the principles and methods of use of rotary incremental encoders?

Rotary encoder is a precision sensor that uses photoelectric method to convert the mechanical angle of shaft into digital signal output. It is currently divided into incremental rotary encoder and absolute rotary encoder. The principle and use method of rotary incremental encoder are as follows: Which ones?

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The incremental rotary encoder directly uses the photoelectric conversion principle to output three sets of square wave pulses a, B, Z, and the phase difference of a and B is 90 degrees, which is convenient for judging the direction of rotation. The Z phase is one pulse per revolution. Positioning at the reference point. Its advantages are simple principle and structure, average mechanical life can reach tens of thousands of hours, strong anti-interference ability, high reliability, suitable for long-distance transmission, but the disadvantage is that it cannot output absolute position information of shaft rotation.

Encoder|Transmitter|Soft starter|Power supply|VFD|Light curtain|Servo products|Human-machine interface|Solenoid valve|Cylinder|Actuator|Flow meter|Transformer|Thyristor|Sensor|Deceleration drive gearbox reducer|Linear guide|Circuit breaker|Refrigeration compressorAll industrial products of okplazas are purchased from the original factory or formal channels of agents to ensure the original authenticity, which perfectly solves the problem of industrial product sample procurement and small-batch procurement for the majority of engineers and purchasing personnel.

How to use incremental encoder:

1. Incremental rotary encoders have different resolutions. It uses the number of pulses generated in each cycle to measure. The number is 6 to 5400 or higher. The more pulses, the higher the resolution. This is one of the important basis for selection.

2. Incremental encoders usually have three signal outputs (40); differential encoders have six signals (41); a, B, Z generally use TTL level, a pulse after, B pulse after, a, B pulse The difference is 90 degrees, and each circle sends out a Z pulse, which can be used as a reference mechanical zero position. Generally speaking, before B-ultrasound, a is used to judge the direction before B or a, but the specific situation depends on the product description.

3. PLC can choose high-speed counting module for data collection; industrial computer can choose high-speed counting board for data collection; single-chip microcomputer data collection is recommended to use the input port with photocoupler.

4. It is recommended that the B pulse should be forward 40, the forward should be 41, the a pulse should be reverse, and the Z origin zero pulse should be used.

The above is about: What are the principles and methods of use of rotary incremental encoders? okplazas.com is a high-tech enterprise integrating R&D, manufacturing and sales of industrial encoders and high-precision couplings. The company's main products include the manufacturing and production of incremental encoders and absolute encoders, cable box displacement sensors and high-precision couplings.