Why do incremental encoders need to be zeroed
Incremental encoders obtain position information by calculating the number of output pulses, which are obtained by converting the number of detected photoelectric signals from the photoelectric converter inside the encoder, so there may be errors. Zeroing is designed to eliminate these errors.
Specifically, the zeroing of incremental encoders can be done in the following two ways:
Mechanical zeroing: Mechanical zeroing usually involves rotating the encoder's rotor to a defined position, usually the starting position of the encoder, and then aligning the encoder zero position with the mechanical position at that position. This can eliminate the error due to mechanical error or poor installation and other factors.
Electronic zeroing: Electronic zeroing is done through software or electronic circuits, usually requiring the use of a special electronic circuit to transmit the encoder's signal to a counter or microprocessor that can automatically identify and calibrate the zero position of the encoder.
It should also be noted that different types and brands of encoders may have different zeroing methods and requirements, so the encoder zeroing must be performed in strict accordance with the manufacturer's regulations to ensure accurate and reliable position information.
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