Position-sensing and motion verification assembly for a motor-dr

Details Position-sensing and motion verification assembly for a motor-dr Position-sensing and motion verification assembly for a motor-dr

1992-03-23

1993-06-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356244, G01D 534

Patent

active

052201619

ABSTRACT:
A position sensing and motion verification assembly for a motor-driven mechanism includes a base member on which a sensor pattern is fabricated. The sensor pattern includes a predetermined orientation of tabs and notches of varying widths. A home position is defined in the sensor pattern and the polarity of the pattern is inverted on opposite sides of the home position. A single sensor such as an optical interrupter is mounted in the assembly in a position relative to the sensor pattern to sense the tabs and notches.

REFERENCES:
patent: 4123173 (1978-10-01), Bullock et al.
patent: 4233592 (1980-11-01), Leichle
patent: 4695164 (1987-09-01), Zivitz et al.
patent: 4827123 (1989-05-01), Gray
patent: 4912389 (1990-03-01), Eguchi
patent: 5117105 (1992-05-01), Nagase et al.

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