Head positioning apparatus

Details Head positioning apparatus Head positioning apparatus

1983-03-29

1985-04-23

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

310317, 360 77, G11B 552

Patent

active

045133344

ABSTRACT:
A head positioning apparatus for an HVTR has two rotary heads mounted to a rotating drum by electrically deflectable bi-morph leaves. To trace tracks on the tape when the tape is played back at a speed different from that used to record it, tracking correction signals are repeatedly applied to the bi-morph leaves to deflect the heads into position to trace the tracks properly. Residual deflection in the bi-morph leaves, when the tracking correction signals terminate at the end of each trace, is removed by a hysteresis-erasing signal that flexes the bi-morph leaf back and forth. The polarity of the hysteresis-erasing signal depends on whether the tape on playback is running faster or slower than the recording speed.

REFERENCES:
patent: 3532911 (1970-10-01), Roberts et al.
patent: 4223358 (1980-09-01), Kubota et al.
patent: 4356522 (1982-10-01), Takano et al.

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