| 摘要 |
PURPOSE:To shorten the time needed for continuous processes given to plural tracks by delaying the index detecting signal by a prescribed period of time. CONSTITUTION:A register 1 reads out a head having a number obtained after switching after the input of the index detecting signal 10 when the head number is switched. Then the register 1 stores the time required to secure a writing enable state. A timer counter 2 loads the storage value of the register 1 by the signal 10 and then loads a head number 1, for example, to a counter 3. The counter 2 decreases the load value by a clock and delivers a signal 12 showing that the load value contents are equal to 0. The counter 3 performs a decrement action by the signal 12 and delivers a signal 11 showing that the count contents are equal to 0. The signal 11 serves as an index detecting signal.
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