| 摘要 |
<p>PURPOSE: To accurately incline a rotary drum having a dead zone which is not inclined even when the drum is inclined at an angle through simple work in accordance with the width fluctuation of the dead zone at every machine when the drum is inclined at the time of reproducing sounds, etc., from a magnetic tape at a variable speed. CONSTITUTION: The inclined angle of a rotary drum KD in accordance with the reproducing speed is proportional to the number counted by a pulse counter through a photonics sensor when the drum KD is rotated by means of a motor 42 in both the forward and backward directions of a tape T irrespective of the width of the dead zone of the drum KD. The count value of the driving amount of the drum KD detected at an arbitrary reference point when the driving amount exceeds the dead zone in an inclined state is stored in advance in a nonvolatile memory 101 and a microcomputer 100 controls the inclination of the drum KD so that the drum KD can be inclined by the sum of the 'count value of the reference point' stored in the memory 101 and the 'count value from the reference point to a target double speed time' stored in the internal ROM of the microcomputer 100.</p> |
