REVOLVING SPEED CONTROLLING DEVICE FOR DISK SIGNAL REPRODUCING DEVICE

PROBLEM TO BE SOLVED: To provide a revolving speed controlling device controlling the revolving speed of a disk every individual disk so as not to exceed the maximum revolving speed of the disk every individual disk by detecting the vibration starting revolving speed of an individual disk every time a disk is to be exchanged and setting the revolving speed of the disk at the time the revolving speed of the disk reaches the maximum vibration being in the vibration tolerance range of the disk the maximum tolerance revolving speed of the disk every individual disk. SOLUTION: This disk signal reproducing device is provided with the rotation driving part 2 of a disk 1, a rotational speed detecting part 3 detecting the rotational speed of the disk 1, a rotational speed control part 7 controlling the rotational speed of the disk 1 by the rotation driving part 2, a vibration detecting part 5 detecting the vibration accompanied by the rotation of the disk 1 and a revolving speed storage part 6 storing the revolving speed of the disk 1 at the time the revolving speed of the disk 1 reaches the maximum vibration being in the vibration tolerance range of the disk 1 every individual disk at the time of rotatingly accelerating the disk 1 and controls the revolving speed of the disk 1 so as not to exceed the maximum tolerance revolving speed of the individual disk stored in the revolving speed storage part 6.