Error cancelling sync-off-tach tape drive system

Details Error cancelling sync-off-tach tape drive system Error cancelling sync-off-tach tape drive system

1975-03-12

1978-07-25

Dobeck, B.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318568, 360 73, 350 375, 365 47, H02P 516

Patent

active

041032144

ABSTRACT:
A holographic recording is made on a tone wheel which is arranged to be driven by a capstan motor and capstan assembly. The holographic recording is a series of radial holograms on the tone wheel which recording is matched to the mechanical system driving the tone wheel by incorporating mechanical drive errors in the holographic recordings. The holographic recording on the tone wheel is read during subsequent operation of the motor/capstan/tone wheel assembly by a laser playback system to provide control signals for a motor energizing means to correct intrinsic drive system errors in a "sync-off-tach" type tape drive system.

REFERENCES:
patent: 3636526 (1972-01-01), Feinleib
patent: 3715740 (1973-02-01), Schmit
patent: 3803630 (1974-04-01), Belcher et al.
patent: 3815151 (1974-06-01), Schmit
patent: 3821722 (1974-06-01), Ost

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