| 摘要 |
To correct the rotational balance of a spindle motor for rotating a disc on a base, a position and an amount of offset for correcting dynamic balance are determined from a position deviation signal, which is obtained from vibration transmitted to a rotary type position control unit located on the base similarly by lowering the servo gain thereof, and an index signal from the spindle motor. With this arrangement the dynamic balance of the spindle motor of an information recording/reproducing apparatus can be simply and accurately corrected without adding an accelerator sensor and the like.
|
