Adaptive voltage control of motor in an incrementing magnetic ta

Details Adaptive voltage control of motor in an incrementing magnetic ta Adaptive voltage control of motor in an incrementing magnetic ta

1975-08-29

1977-06-28

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

360 84, 318696, 310 49R, G11B 1532, G11B 1558, G11B 1520

Patent

active

040329828

ABSTRACT:
In a rotating head magnetic tape transport, the tape is maintained stationary as the head sweeps a selected data track. A length of tape is buffered in a vacuum column between a supply spool and a rotating head station. A take-up spool on the opposite side of the head station is controlled by minimizing the overshoot or undershoot of the motor driving the take-up spool as the radius of the amount of tape on the spool increases or decreases (i.e., change). After a step operation, the overshoot or undershoot of the motor is measured and compared with a reference range to determine if the undershoot or overshoot is within the reference range. If the measured quantity is within the reference range, no adjustment is made. If the measured quantity is outside of the voltage level or reference range, the gain of the take-up motor is adjusted.

REFERENCES:
patent: 3386018 (1968-05-01), Smith-Vaniz
patent: 3445741 (1969-05-01), Gerber
patent: 3465225 (1969-09-01), O'Regan et al.
patent: 3487392 (1969-12-01), Lewis
patent: 3593097 (1971-07-01), Gebelein, Jr.
patent: 3864739 (1975-02-01), Jackson
patent: 3868557 (1975-02-01), Scott, Jr.

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