| 摘要 |
PURPOSE:To make stably and speedily by jump of plural tracks restarting the operation of a tracking servo circuit or carriage servo circuit after a carriage and an actuator are driven forcibly in the same direction in response to a jump command. CONSTITUTION:When the jump command is generated, a switch S4 is turned off to stop the servo operation of the carriage servo circuit 20 and a switch S5 is also turned on at the same time to rotate a carriage motor 4, thereby driving the carriage in one direction forcibly. An S1 is turned off a time T1 later to stop the servo operation of the tracking servo circuit 10 and an S2 is also turned on at the same time to drive the actuator 1 forcibly. The S2 is turned off and an S3 is turned on a time T2 later to brake the actuator 1. Further, the S3 is turned off and the S1 is turned on a time T4 later to restart the servo operation of the circuit 10. Thus, many tracks are jumped over stably.
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