Control of the position of the object is an important task in the industry. For this task, use special devices that are encoders. Encoders are needed for feedback when moving, or building coordinate systems. Unfortunately, for solving some problems, absolute angular encoders have not suitable dimensions. This is due to the use of code disks in systems with good accuracy. The design of the encoder is proposed on the basis of position-sensitive photodetectors, which implies smaller dimensions while maintaining accuracy characteristics. The installation unit of the photodetector has the ability to adjust the alignment of the center of the photodetector and the axis of rotation of the shaft, since according to the study it was found that this error has the greatest impact on accuracy. The brand illumination system is developed. The brand is projected onto the photosensitive surface of the photodetector. Replacement of the photodetector provides for the replacement of the node setup of the sensor.
This article is about the research of precision characteristics of a circular sensor "Multiscan". The research was
conducted on installation which base was a goniometer GS-5. Such characteristics as nonlinearity, stability, error
of reproducibility of results of measurements were investigated. A scheme for arranging the encoder on the basis
of a circular photodetector "Multiscan" is proposed.
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