| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for a magnetic disk that prevents an adverse influence from being exerted on product quality by decreasing how many times a shock is imparted to a magnetic disk drive and shortens an assembly time. SOLUTION: In the manufacturing method for the magnetic disk drive that imparts a shock to the magnetic disk drive H to correct the dynamic balance of a temporarily fixed magnetic disk, the acceleration of the magnetic disk drive is detected when the magnetic disk rotates to calculate the dynamic unbalance quantity of the magnetic disk, and then the shock is imparted to the magnetic disk drive in timing where the dynamic unbalance quantity is decreased when the dynamic unbalance quantity is smaller than a 1st threshold or once in timing where the dynamic unbalance quantity is increased at least once when the dynamic unbalance quantity is larger than the 1st threshold. COPYRIGHT: (C)2006,JPO&NCIPI
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