| 摘要 |
A disk recording or playback device comprises a pickup movable along the rear surface of a disk, a motor for moving the pickup, arithmetic means for calculating the position of the pickup on the disk, and timer means for measuring the time taken for the movement of the pickup. Predetermined for controlling the operation of the pickup are a specified distance L1 the pickup is to be moved, and a standard period of time T1 taken for the pickup to move the distance L1. The pickup is moved the specified distance L1 by energizing the motor, and the time taken for the movement and measured by the timer means is compared with the standard time T1. The voltage to be supplied to the motor is calculated from the result of comparison. When the measured time is approximate to the standard time T1, the value of the voltage for the motor is temporarily stored in a nonvolatile memory.
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