JPH01170359U - - Google Patents
Info
- Publication number
- JPH01170359U JPH01170359U JP6614988U JP6614988U JPH01170359U JP H01170359 U JPH01170359 U JP H01170359U JP 6614988 U JP6614988 U JP 6614988U JP 6614988 U JP6614988 U JP 6614988U JP H01170359 U JPH01170359 U JP H01170359U
- Authority
- JP
- Japan
- Prior art keywords
- pattern
- index
- track
- magnetic head
- magnetic disk
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Rotational Drive Of Disk (AREA)
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Description
第１図は本考案の一実施例による磁気デイスク
装置の制御系の構成を示すブロツク図、第２図イ
〜トは本実施例のタイムチヤート、第３図は本実
施例の動作を説明するためのフローチヤート、第
４図は従来構成を示すブロツク図、第５図イ〜ニ
は従来のタイムチヤートである。
１０……スピンドルモータ（モータ）、１１…
…ロータ、１２……インデツクスセンサ（検出手
段）、１３……同期検出回路、１４……パターン
検出回路（パターン比較手段）、１５……ＣＰＵ
（制御手段）、１６……バツフア（記憶手段）、
１７……パルス発生回路（パルス発生手段）、１
８……トライステート回路。
Fig. 1 is a block diagram showing the configuration of a control system of a magnetic disk device according to an embodiment of the present invention, Fig. 2 is a time chart of this embodiment, and Fig. 3 explains the operation of this embodiment. FIG. 4 is a block diagram showing a conventional configuration, and FIG. 5 A to D are conventional time charts. 10... spindle motor (motor), 11...
... Rotor, 12 ... Index sensor (detection means), 13 ... Synchronization detection circuit, 14 ... Pattern detection circuit (pattern comparison means), 15 ... CPU
(control means), 16...batshua (memory means),
17...Pulse generation circuit (pulse generation means), 1
8...Tri-state circuit.
Claims (1)
クスパルスに基づき各トラツクの開始基準点を決
定するように構成した磁気デイスク装置において
、 磁気デイスクを回転駆動するモータのロータ外
周の周方向に沿つて各トラツク毎にずらして設け
られ、各トラツクに対応させたパターンと、 前記モータの回転に伴い前記パターンを検出す
る検出手段と、 磁気ヘツドがシーク中のトラツクのインデツク
スパターンを記憶する記憶手段と、 前記検出手段により検出されたパターンと前記
記憶手段に記憶されたインデツクスパターンとを
比較し、前記両パターンが一致した時に一致信号
を出力するパターン比較手段と、 前記パターン比較手段から一致信号が出力され
た時にインデツクスパルスを発生するパルス発生
手段と、 磁気ヘツドがシーク動作を行う場合は前記磁気
ヘツドが目標トラツクへシークした後に該目標ト
ラツクのインデツクスパターンを前記記憶手段に
記憶し前記インデツクスパルスの出力を許可する
一方、磁気ヘツドがシーク動作を行わない場合は
前記検出手段によるパターンの検出間隔に基づき
前記モータの回転が正常か否かを判定する制御手
段と を具備してなる磁気デイスク装置。[Scope of Claim for Utility Model Registration] In a magnetic disk device configured to determine the starting reference point of each track based on index pulses generated as the magnetic disk rotates, the outer periphery of the rotor of a motor that rotationally drives the magnetic disk. a pattern that is provided offset for each track along the circumferential direction of the magnetic head and corresponds to each track; a detection means that detects the pattern as the motor rotates; and an index pattern of the track that the magnetic head is seeking. storage means for storing the pattern; pattern comparison means for comparing the pattern detected by the detection means with the index pattern stored in the storage means and outputting a match signal when the two patterns match; pulse generating means that generates an index pulse when a matching signal is output from the comparing means; and when the magnetic head performs a seek operation, after the magnetic head seeks to the target track, the index pattern of the target track is stored in the memory. control means for storing the index pulse in the means and permitting the output of the index pulse, while determining whether or not the rotation of the motor is normal based on the pattern detection interval by the detecting means when the magnetic head does not perform a seek operation; A magnetic disk device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6614988U JPH01170359U (en) | 1988-05-19 | 1988-05-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6614988U JPH01170359U (en) | 1988-05-19 | 1988-05-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01170359U true JPH01170359U (en) | 1989-12-01 |
Family
ID=31291562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6614988U Pending JPH01170359U (en) | 1988-05-19 | 1988-05-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01170359U (en) |
-
1988
- 1988-05-19 JP JP6614988U patent/JPH01170359U/ja active Pending
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