JPS6473573A - Head positioning system - Google Patents

Head positioning system

Info

Publication number
JPS6473573A
JPS6473573A JP23029287A JP23029287A JPS6473573A JP S6473573 A JPS6473573 A JP S6473573A JP 23029287 A JP23029287 A JP 23029287A JP 23029287 A JP23029287 A JP 23029287A JP S6473573 A JPS6473573 A JP S6473573A
Authority
JP
Japan
Prior art keywords
speed
reference signal
voltage
driving
executed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP23029287A
Other languages
Japanese (ja)
Inventor
Doshu Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP23029287A priority Critical patent/JPS6473573A/en
Publication of JPS6473573A publication Critical patent/JPS6473573A/en
Pending legal-status Critical Current

Links

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)

Abstract

PURPOSE:To prevent the occurrence of a seek error by comparing the voltage of a driving signal for driving a head with voltage previously fixed. CONSTITUTION:The plural data pattern of a speed reference signal 14 are written in the ROM 11 of a speed reference signal generation circuit 15, the voltage of the driving signal 4 is compared with the prescribed voltage level and it is decided whether the speed feedback control of linear operation can be executed or not when an electric power amplifier 26 is saturated at the time of decelerating. Then, when there is the possibility that the speed feedback of the linear operation cannot be executed, the data pattern of the speed reference signal 14 is switched from the normal used one to the other. Therefore, the speed feedback control of the linear operation can be executed by avoiding the saturation of the electric power amplifier 26 at the time of decelerating. Thus, regardless of the change of supply voltage, the dispersion of a driving part force constant and the decrease of the force constant caused by the heat build-up of the driving part, the speed reference signal 14 is correctly followed up by an actual measurement speed signal 24 and the occurrence of the seek error can be prevented.
JP23029287A 1987-09-14 1987-09-14 Head positioning system Pending JPS6473573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23029287A JPS6473573A (en) 1987-09-14 1987-09-14 Head positioning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23029287A JPS6473573A (en) 1987-09-14 1987-09-14 Head positioning system

Publications (1)

Publication Number Publication Date
JPS6473573A true JPS6473573A (en) 1989-03-17

Family

ID=16905530

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23029287A Pending JPS6473573A (en) 1987-09-14 1987-09-14 Head positioning system

Country Status (1)

Country Link
JP (1) JPS6473573A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7982999B2 (en) 1994-06-07 2011-07-19 Hitachi Global Storage Technologies Japan, Ltd. Information storing device and method for controlling same to record/reproduce information by selecting one of working modes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7982999B2 (en) 1994-06-07 2011-07-19 Hitachi Global Storage Technologies Japan, Ltd. Information storing device and method for controlling same to record/reproduce information by selecting one of working modes

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