| 摘要 |
<p>PURPOSE:To always keep tape speed constant, by controlling the speed of a take-up side motor based on a tape speed detecting signal. CONSTITUTION:A large number of driving voltages for a take-up motor 1T required to always set the tape speed constant for the change of the winding diameter of a tape from the start of the winding to the end of the winding of the tape at a take-up side, that is, a speed detecting signal is stored in a storage means 5 in advance. The selection of stored data is decided by a tape speed signal relating to the winding diameter of the tape obtained from a tape speed detecting means 2. Thus, since the speed control of the take-up motor 1T is performed only by using the tape speed detecting signal, constant tape speed can be always obtained in spite of the change of the winding diameter of the tape.</p> |
