Photoelectric position pick=up for stepping motors - has mirror pyramid on motor shaft and multiple reflector in housing

摘要

The pick-up has a light source is a case, with a mirror pyramid on the motor shaft in the light path from the source. It reflects the ray of light to a photoreceiver. A multiple face mirror reflector (9) in the housing (1) is in the path of the light beam (7) reflected from the corresponding face of the mirror pyramid (8). Light conductors (12) are of a number determined by the ratio of the number of motor steps per revolution to the product of the number of faces of the mirror pyramid (8) and of the reflector (9). First ends of light conductors (12) are reflected in the path of light beam (7) from a corresponding face or reflector (9). Light beam (7) emerging from the other ends of light conductors (12) falls on the photoreceiver (14).