Will incremental encoder rotation overflow
According to the operation mode of the incremental encoder, the pulse counter determines the position information by counting the number of pulses. But because the pulse counter is finite, it is possible for the counter to overflow if the counter count reaches its maximum value.
Specifically, in an n-wire encoder, the maximum pulse count is 2^N. When the number of pulses output by the encoder exceeds the maximum count value, the counter will be counted again from zero, resulting in deviation of position information.
To avoid rotation overflow, you can use the following methods:
1. Increase the resolution of the encoder, that is, increase the pulse number of the encoder, so as to reduce the possibility of overflow of the pulse counter.
2. Use absolute encoders, which have multiple independent position values, to eliminate rotation overflow problems.
3. Restrictions on the direction and speed of rotation are adopted in the system design to ensure that no rotation overflow occurs.
4. Increase the number of bits in the encoder interface, such as upgrading from 8 to 16 or 32 bits, to increase the maximum count value of the counter and thus reduce the possibility of overflow.
In short, rotation overflow is a common problem in encoder applications, which should be avoided in system design and encoder selection.
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