| 摘要 |
<p>PURPOSE:To control the device with a high precision so that it is stopped in the noiseless still state, by reversing and damping a capstan motor after the delay of a prescribed time from the time when two kinds of tracking error signal have the same level. CONSTITUTION:In case of the intermittent driving variable speed reproducing mode, a slow line is set to the H level, and a local frequency is set and fixed to f2, and a CM run line of a capstan motor 5 is set to the H level to drive it in a high speed after the delay of a time t1 from the rise of a head switching signal SW30; and after the delay of a time t2, the CM run line is opened to change the mode to the speed control mode so that the speed becomes a standard speed through a speed control circuit 16, and a tracking adjustment value tr is read. Next, errors 2 and 3 are subjected to AD conversion, and the device is held until they coincide with each other. After they coincide with each other, the operation of a prescribed function (f) determined other parameters is performed for the set value tr to determine a delay quantity trA. After the delay of the time trA, a reverse line is set to the H level, and the device is delayed for a time tb determined by a brake time setting volume 22, and the CM run line is set to the L level, and the reverse line is set to the L level, thus stopping the motor 5 completely.</p> |
