Title:
HEAD MOVING SYSTEM
Document Type and Number:
Japanese Patent JPS598170
Kind Code:
A
Abstract:
PURPOSE:To vary the target speed setting frequency, by minimizing intervals of head movement to perform a precise speed control. CONSTITUTION:A seek instruction is sent to a microcomputer 3 from an upper device 1. In the microcomputer, the track address while the head follows up is stored preliminarily in a memory, and the difference between this track address and a target track address is calculated immediatrly. This difference is stored in a memory 5 of the microcomputer 3. Target speed data corresponding to the difference is taken out from the memory 5 and is sent from the microcomputer 3 to a DA converter 4. Target speed data Si converted to an analog voltage in this DA converter 4. The microcomputer monitors the difference quantity; and if this quantity is within a set range, the microcomputer sends target speed data to the DA converted in frequency corresponding to it.
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Inventors:
TOKIDA KATSUHIRO
HARUNA TOSHIYUKI
HARUNA TOSHIYUKI
Application Number:
JP11540682A
Publication Date:
January 17, 1984
Filing Date:
July 05, 1982
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G05D3/12; G11B21/08; (IPC1-7): G05D3/12; G11B21/10
Domestic Patent References:
| JPS5786910A | 1982-05-31 |
Attorney, Agent or Firm:
Katsuo Ogawa