| 摘要 |
PROBLEM TO BE SOLVED: To prevent the occurrence of vibration etc., at a rotation time even when imbalance of weight exists in a body to be rotated by adjusting rotary balance of a rotation part in the state that a hub magnetically attracted to a turntable or a dummy member having a weight distribution same as the hub is fixed to the turntable. SOLUTION: The hub 11 fitted with no disk is magnetically attracted to the turntable. A drive pin 5 is abutted on an inner edge 13a of a drive hole 13, and a central axis is abutted on the inner edge 12a of a central hole 12, and the center (axial center of central axis) of the turntable is made to coincide with the center O of the hub 11. A rotary part is rotated matching with the number of revolution when the disk is rotated really. The weight for adjusting the rotary balance is added/deleted on parts (turntable, rotor etc.), except the hub 11. When a rotation drive part adjusted with the weight balance is loaded on a disk device, the hub 11 provided on the center of the disk is set upon the turntable, and the rotary balance at a rotation driven time is balanced. |
