How to use incremental encoder2021

The working principle of the incremental encoder is as follows: the pulse code disk rotating with the rotating shaft has a uniformly engraved grating, and a number of light-transmitting sections and light-shielding sections are evenly distributed on the code disk.

Incremental encoders do not have a fixed starting zero point, and output pulses that are proportional to the increase in the angle of rotation. A counter is needed to count the pulses. Every time a light-transmitting area is rotated, a pulse signal is sent, the current value of the counter is increased by 1, and the counting result corresponds to the increase in the rotation angle.

Incremental encoders have simple manufacturing processes and low prices, and are sometimes used to measure absolute rotation angles.

How to use incremental encoder?

1. Incremental rotary encoders have different resolutions, which are measured by the number of pulses generated per revolution. The number ranges from 6 to 5400 or higher. The more pulses, the higher the resolution; this is an important basis for selection one.

2. Incremental encoders usually have three signal outputs (there are six signals for differential): A, B and Z, generally using TTL level, A pulse in the front, B pulse in the back, A and B pulses are 90 degrees apart, each The circle sends out a Z pulse, which can be used as a reference mechanical zero position. Generally, A is ahead of B or B is ahead of A to determine direction, but the specific situation depends on the product description.

3. Use PLC to collect data, you can choose a high-speed counting module; use an industrial computer to collect data, you can choose a high-speed counting board; use a single-chip microcomputer to collect data, and it is recommended to use an input port with a photocoupler.

4. It is recommended that B pulse be forward (forward) pulse, A pulse should be reverse (backward) pulse, and Z origin zero pulse.

5. Set up a counting stack in the electronic device.