[rotary encoder Atonix E30S4-100-3-T-24](https://www.automation24.ir/product-573/%D8%B1%D9%88%D8%AA%D8%A7%D8% 25B1%DB%8C-%D8%A7%D9%86%DA%A9%D9%88%D8%AF%D8%B1-%D8%A2%D8%AA%D9%88%D9%86%DB% 258C%DA%A9%D8%B3-e30s41003t24)
## Main features:
● Rotary encoder diameter Ø30 mm, miniature shaft type
● Easy installation in small space
● Supply voltage: 12 to 24 volts DC (with a difference of 5%)
● Diversity in output type
● Easy rotation with minimal force
● 100 output pulses
The shaft encoder converts the angular movement of a shaft or axis into countable electrical pulses. In terms of performance, encoders are divided into two types: incremental and absolute
they become
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### Incremental encoder
In this type of encoders, a pair of transmitter and receiver LEDs and a calibrated disc (black and white or perforated) are used, and the calibrated disc is placed between the transmitter and receiver sensor. During the rotation of the graduated disc, the signal between the transmitter and the receiver is cut off and connected successively, and we will have a set of pulses at the output. By counting the number of pulses, the amount of rotation and displacement can be calculated. The more the number of pulses, the more accurate the movement calculation will be.
### Absolute encoder
A major problem in incremental encoders is that the count of pulses must be stored in a counter, and if there is a malfunction in the counter for any reason, the encoder loses its position. In the incremental encoder, the zero point of movement will not be clear. To solve this problem, absolute encoders were created that will always know the position they are in and the distance from the starting point (zero point). The disk used in these encoders consists of a number of equivalent grooves, which generate specific codes by rotating them.
For example, if the encoder has 3 disk sets, we will have a 3-bit output, and as a result, the encoder will be able to detect 8 locations, which means the accuracy is equal to 45 degrees (8.360=45). The more the number of grooves, the higher the accuracy of the encoders. .
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