Head reel servo system in a recording and/or reproducing apparat

Details Head reel servo system in a recording and/or reproducing apparat Head reel servo system in a recording and/or reproducing apparat

1984-09-27

1987-03-10

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

324161, 324166, 360 73, 361242, G11B 1518

Patent

active

046494413

ABSTRACT:
An improved reel servo for a recording and reproducing machine is disclosed. The reel servo as well as other servos in the machine are controlled by a single microprocessor which results in greater inherent communication between such servos and significantly improved operating capabilities. The reel servo itself is adapted to have the supply and take-up reels operate in different kinds of close loop servo control during various operating modes. The servo circuitry provides instantaneous information to the microprocessor for determining the diameter of tape that is wrapped on each of the reels. The reel servo has the capability of performing high speed shuttle and cueing operations without engaging the capstan and the tensioning arm can be positioned to provide the appropriate tape tension during shuttling in both the forward and reverse directions. An acceleration loop controls the supply reel so that the tape tension is maintained within predetermined upper and lower limits.

REFERENCES:
patent: 3792460 (1974-02-01), Ratz
patent: 3915271 (1975-10-01), Harper
patent: 4159572 (1979-07-01), Nunes
patent: 4302785 (1981-11-01), Mussatt

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