Document Type and Number:
Japanese Patent JPS5046307
Kind Code:
A
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 the rotating head station. A take-up spool on the opposite side of the head station is servo controlled to maintain proper head/track alignment and to periodically step the tape to an adjacent track. Changes in the tape radius on the take-up spool are compensated for by (1) a stop-lock source of motor energization whose magnitude is servo controlled by unbalance between the vacuum column force tending to pull the tape in one direction and the take-up spool motor torque tending to pull the tape in the opposite direction, and (2) a step modification network which responds to head/track alignment error caused by the variable tape radius on the take-up spool.
Application Number:
JP8757774A
Publication Date:
April 25, 1975
Filing Date:
August 01, 1974
Export Citation:
International Classes:
G05D13/62; G11B15/087; G11B15/18; G11B15/46; G11B15/467; H04N5/7826; G11B15/60; G11B15/61; (IPC1-7): G11B5/52