Rotary Encoder ！

The primary components of a rotary encoder are the disk, sensor, and electronics. The disk contains a pattern of fine lines on its surface or external teeth machined on the outside diameter. A sensor is mounted in close proximity to the disc, and reads the lines or teeth. The electronics consist of an output device that receives the signal from the sensor and converts it into a usable signal that provides speed and position feedback. The disk, sensor, and electronics are all mounted inside a housing, with a single cable extending out of the housing that electrically connects the encoder to other devices.

A rotary encoder can use either optical or magnetic-sensing technology. An optical encoder uses a light emitting diode that shines light through a thin glass disk with a pattern of fine lines on its surface. The light passes through the glass disk and a photo-detector receives the signal and produces an electrical output. A magnetic encoder uses a magneto-resistive sensor that can detect changes in the magnetic field as the patterned disk rotates. These changes correspond to the different angular positions as the disk moves.

Rotary encoders are available in many sizes, with different levels of resolution, and with special features such as indicator lights, custom disks, and improved electronics. Selecting the right encoder for a particular application depends primarily on the speed of rotation, measurement accuracy required, and use environment. A rotary encoder with optical sensing is most often used in applications where high operating speeds and resolution are required. An encoder with magnetic sensing is more resistant to environmental factors like dust, moisture, vibration, and mechanical shock, and is typically used for more rugged applications.

Previous：Roundss digital display wire encoder draw wire sensor 1500mm range
Next：Roundss low cost speed sensor Open collector servo motor encoder