| 摘要 |
<p>PURPOSE:To eliminate slow tracking deviation by decelerating a capstan motor after the lapse of a time in which phase difference detected by a phase difference detecting means is added on a time decided by slow tracking adjustment. CONSTITUTION:Field slow reproduction is performed based on an FG pulse 100 generated in proportion to the rotation of the capstan motor 1 and a control pulse 200 reproduced from a tape 10. A counter means 7 which counts the number of waves of the FG pulse 1 starting from a time when a negative control pulse 200 is detected, and a control means 5 which starts control to decelerate the capstan motor 1 after the lapse of the time obtained by adding the phase difference T1 detected by the phase difference detecting means 5, 6 on the time Td decided by the slow tracking adjustment starting from the time when the counter means 7 counts a prescribed value are provided. In such a way, the slow tracking deviation due to the phase difference between the control pulse 200 and the capstan FG pulse 100 can be eliminated.</p> |
