| 摘要 |
PURPOSE:To prevent a moving stand from continuing the change of direction indefinitely, by returning the moving stand to a disc loading position, if the presence/absence of a disc is detected and the moving direction of the moving stand is reversed for a prescribed number of times. CONSTITUTION:When a disc 1 is loaded on a disc loading position of a moving stand 2, a drive motor M is turned forward with the output of a photo interruptor 3, and the moving stand 2 starts moving to the loading direction. If the disc is shifted from the loading position on the way, the motor M is reversed and the unloading is started. But if the disc returns to the correct loading position, the motor M is again turned forward and the loading operation is proceeded. The number of times of the inversion is counted up and when the number of counts reaches a set number, useless operation can be prevented by the unloading so that the moving stand 2 is returned to the disc loading position. |
