An encoder is a rotary transducer that transforms an angular movement into a series of digital electrical impulses. If coupled to a motor shaft or an endless screw, the generated pulses can be used for angular control or linear movements. During rotation, electrical signals can be processed by numerical controllers (CNC), programmable logic (PLC) and control systems.
The main applications of these transducers are automatic machines, robot feedback control, measurement and control of control devices.
In MD Micro Detectors encoders, the angular transduction movement is based on the photoelectric scanning principle. The reading system is based on the rotation of a radial graduated disk formed by alternating opaque and transparent windows; the system is perpendicularly illuminated by an infrared light source which projects the image of the disk onto the surface of the receivers. The receivers transduce the variations of light that occur caused by the movement of the optical disc and convert them into corresponding electrical signals, which are then processed electronically.
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