Recorder

Details Recorder Recorder

1989-01-27

1990-05-22

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, H02P 800

Patent

active

049280503

ABSTRACT:
A data recorder in which a recording is moved by stepping motor whose rotor rotation angle is detected, the stepping motor having a current switching circuit which controls the application of excitation current to the drive coils of the motor in accordance with the detected rotation angle. A control circuit counts the detected result of the rotor rotation angle, detects the position of the head and generates start and stop control signals of the head, thereby starting and stopping switch-over control of the current switching circuit being effected.

REFERENCES:
patent: 3900780 (1975-08-01), Tanikoshi
patent: 3946292 (1976-03-01), Tanikoshi
patent: 4051420 (1977-09-01), Tanikoshi
patent: 4389605 (1983-06-01), Noda
patent: 4415845 (1983-11-01), Oudet
patent: 4484124 (1984-11-01), White et al.
patent: 4513236 (1985-04-01), Kikukawa et al.
patent: 4746847 (1988-05-01), Kikugawa
patent: 4794292 (1988-12-01), Torisawa

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