CN1619665A - Method of correcitng stepper motor steps of optical disk device - Google Patents
Method of correcitng stepper motor steps of optical disk device Download PDFInfo
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- CN1619665A CN1619665A CN 200310118064 CN200310118064A CN1619665A CN 1619665 A CN1619665 A CN 1619665A CN 200310118064 CN200310118064 CN 200310118064 CN 200310118064 A CN200310118064 A CN 200310118064A CN 1619665 A CN1619665 A CN 1619665A
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- rail
- disc apparatus
- optical disc
- tracks
- step number
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Abstract
The present invention provides a method for correcting step number of step motor of optical disk device. Its simple description is as follows: after the optical disk is placed in the optical disk device, calculating the step number required by step motor when the track number for moving optical head module is predefined, then calculating actual track number for moving optical head module after the required step number is gone through by said step motor so as to obtain the corrected track number/step number ratio.
Description
Technical field
The present invention is relevant for the method for control step motor in the optical disc apparatus, and the method for particularly proofreading and correct relevant for the step motor step number of optical disc apparatus.
Background technology
General optical disc apparatus receive that main frame (host) sends read (or writing) order the time, its rail searching servo system (seeking servo) operation of (seeking) of can jumping onto the tracks earlier, that is utilize coaster motor (sled motor) in the optical disc apparatus to drive on the target rail (target track) that the optical head module moves to the servo-drive system indication.Treat that optical disc apparatus determines that optical head arrives (promptly locking rail) behind the target rail, just carries out the operation of access (access) CD.Do when optical disc apparatus and to jump onto the tracks and during the operation of access, the speed that the optical head module moves will influence the speed that optical disc apparatus reads or writes.
The coaster motor that common drive optical head module moves roughly is divided into two kinds, and one is d.c. motor (DCmotor), and another kind then is step motor (stepping motor).The optical disc apparatus that uses d.c. motor is different because of each optical disc apparatus because of the tooth bar in the optical head module and the coefficient of friction between the lead screw, causes the application of force size of its wayward coaster motor.So optical disc apparatus now adopts step motor more.Because of it is to form moving of optical head module with digital form, so the traveling time of optical head module does not have too big difference in individual other optical disc apparatus.
Yet,, cause and adopt the optical disc apparatus of step motor still can't exactly the optical head module be moved to the target rail because of the difference on the CD manufacturing process (variation).
Please refer to Fig. 1, the specification of CD is that its each gauge is 1.6 μ m.If because of the difference of CD manufacturing process, cause the gauge of CD to become 1.7 μ m.That is 10000 gauges of this CD have very big difference as shown in Figure 1 from 10000 gauges of (the A point is to the C point) and general standard CD from (the A point is to the B point).The rail number that the default coaster of general optical disc apparatus is moved is 50: 1 (fixed ratio) with the step number ratio that step motor is walked.When receiving the jumping 10000 rail orders that main frame transmits, under general case, step motor was walked for 200 steps (obtaining divided by 50 with 10000 rails) and was promptly driven the optical head module and move 10000 rails and arrive the target rail this moment.Yet because the single gauge on the CD is longer, causes step motor to cover for 200 steps and but only drive the optical head module and move 9400 rails, the distance objective rail still has the distance of 600 rails.
The lock rail operation that above-mentioned situation is carried out for the back of jumping onto the tracks is very unfavorable.Often will spend the more time locks rail or causes locking rail failure.So the optical disc apparatus that utilizes step motor to jump onto the tracks as can be known needs a kind of method of more effective control step motor step number, the feasible back optical head module of jumping onto the tracks correctly arrives on the target rail.
Summary of the invention
The method that the purpose of this invention is to provide the step motor step number correction of optical disc apparatus.Solve the problem that individual discs causes optical disc apparatus accurately to jump onto the tracks because of manufacturing process difference with this.
The present invention proposes the method for the step motor step number correction of optical disc apparatus.After CD is inserted optical disc apparatus, the required step number of step motor when the predetermined rail of calculating mobile optical head module is counted; Calculate this step motor again and cover the actual rail number that the optical head module moves after the required step number, the rail number/step number ratio after obtaining proofreading and correct with this.
In order further to understand feature of the present invention and technology contents, see also following about detailed description of the present invention and accompanying drawing, yet accompanying drawing only provide with reference to and the explanation usefulness, be not to be used for the present invention is limited.
Description of drawings
Fig. 1 is its gauge errors table diagrammatic sketch that is caused for CD manufacturing process difference;
Fig. 2 proofreaies and correct the method flow diagram of step motor step number for the present invention.
The drawing reference numeral explanation
100 CDs are inserted or power connection
110 receive the order of jumping onto the tracks
130 utilize default rail number/step number to calculate the step number that the step motor of this time jumping onto the tracks should be walked than (tracks/steps ratio)
140 jump onto the tracks
150 calculate actual rail number of jumping onto the tracks with right path number/step number ratio more
Embodiment
Because of CD manufacturing process difference makes other CD gauge differ, cause optical disc apparatus coaster motor when jumping onto the tracks to drive the optical head module and correctly arrive the target rail.Very unfavorable for the lock rail operation that the back of jumping onto the tracks is carried out, often to spend the more time and lock rail or cause locking the rail failure.When optical disc apparatus reads thus with the expensive time.In order to overcome the problems referred to above.The present invention proposes the method for the step motor step number correction of optical disc apparatus.
Please refer to Fig. 2, it is the method flow diagram of the step motor step number correction of optical disc apparatus.
Step 100: CD is inserted or power connection.
Step 110: receive the order of jumping onto the tracks.
Step 130: utilize default rail number/step number to calculate the step number that the step motor of this time jumping onto the tracks should be walked than (tracks/steps ratio).
Step 140: jump onto the tracks.
Step 150: calculate actual rail number of jumping onto the tracks with right path number/step number ratio more.
When CD is inserted (tray in) or power connection (power on) promptly enters this correcting process, when jumping onto the tracks during order of receiving that main frame sends (suppose this moment optical head module from target rail 10000 rails), the default rail number/step number ratio of optical disc apparatus is 50: 1 again.Calculating this rail number/step number than under the step number that should walk of step motor institute be 200 to go on foot.The operation (promptly utilizing step motor to drive the optical head module moves) of jumping onto the tracks immediately.The time location that detects on the CD after jumping onto the tracks can be learnt actual rail number of jumping onto the tracks.If when actual rail number of jumping onto the tracks had only 9000 rails, the gauge of CD reality came longly than standard film as can be known.Rail number/the step number of optical disc apparatus reads the efficient of CD than adjusting with enhancement.It is 45: 1 that several 9000 rails of the actual rail of jumping onto the tracks can be got corrected rail number/step number ratio divided by 200 steps of step number that step motor is walked.Optical disc apparatus all adopts this corrected rail number/step number recently to jump onto the tracks when reading same CD afterwards.Unless the power supply of optical disc apparatus is turned off or CD is removed (tray out).
So CD is after inserting optical disc apparatus, or behind the optical disc apparatus power connection and when having CD to exist, above-mentioned correcting process will start.As long as did the operation of once jumping onto the tracks, with regard to recoverable rail number/step number ratio.
Walking actual rail number when in addition, utilization of the present invention is jumped onto the tracks comes more right path number/step number than the most suitable when long the jumping onto the tracks.It is more than 10000 rails that the length of definition this moment is jumped onto the tracks.The gauge error ratio of CD difference is short and be difficult to distinguish that the gauge error of CD difference is comparatively obvious during long jumping onto the tracks, and relatively can obtain rail number/step number ratio accurately during because of short jumping onto the tracks.
Therefore, the invention has the advantages that the result who utilizes jump onto the tracks the first time obtains rail number/step number ratio accurately.It goes without doing when jumping onto the tracks proofreaies and correct the precision that the more effective control of optical disc apparatus is jumped onto the tracks many times.
Moreover another advantage of the present invention then is by this correcting process, and effectively raising is jumped onto the tracks the required time, and overcomes the not good problem of manufacturing process access efficiency that difference causes because of individual discs.
In sum, though the present invention with preferred embodiment openly as above, right its is not in order to limit the present invention, any those skilled in the art, under the situation that does not break away from the spirit and scope of the present invention, can carry out various changes and modification, therefore scope of the present invention is as the criterion with the claim restricted portion that is proposed.
Claims (9)
1. the method for the step motor step number of optical disc apparatus correction comprises the following steps:
The predetermined step number of the step motor when (a) the mobile pre-orbit determination of an optical head module of calculating is counted;
The actual rail number that this optical head module is moved when (b) calculating this step motor and cover this predetermined step number is with this rail that obtains proofreading and correct number/step number ratio.
2. the method for claim 1, wherein this pre-orbit determination number is more than or equal to 10000.
3. the method for claim 1, wherein the rail of this correction number/step number is than being obtained divided by this predetermined step number by this actual rail number.
4. the method for claim 1 when a CD is inserted, is just carried out step (a).
5. the method for claim 1 when the power connection of this optical disc apparatus and a CD exist, is just carried out step (a).
6. the step motor step number of the optical disc apparatus method of proofreading and correct is used to drive a step motor of an optical head module, comprises the following steps:
(a) drive the predetermined step number of this step motor;
The actual rail number that this optical head module moves when (b) calculating this step motor and cover this predetermined step number;
(c) the rail number that obtains proofreading and correct according to this actual rail number and this predetermined step number/step number ratio.
7. method as claimed in claim 6, wherein the rail of this correction number/step number is than being obtained divided by this predetermined step number by this actual rail number.
8. method as claimed in claim 6 when a CD is inserted, is just carried out step (a).
9. method as claimed in claim 6 when the power connection of this optical disc apparatus and a CD exist, is just carried out step (a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310118064 CN1619665A (en) | 2003-11-20 | 2003-11-20 | Method of correcitng stepper motor steps of optical disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310118064 CN1619665A (en) | 2003-11-20 | 2003-11-20 | Method of correcitng stepper motor steps of optical disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1619665A true CN1619665A (en) | 2005-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310118064 Pending CN1619665A (en) | 2003-11-20 | 2003-11-20 | Method of correcitng stepper motor steps of optical disk device |
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| CN (1) | CN1619665A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110602296A (en) * | 2019-09-17 | 2019-12-20 | 深圳市万普拉斯科技有限公司 | Method and device for calibrating motion steps of stepping motor and mobile terminal |
-
2003
- 2003-11-20 CN CN 200310118064 patent/CN1619665A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110602296A (en) * | 2019-09-17 | 2019-12-20 | 深圳市万普拉斯科技有限公司 | Method and device for calibrating motion steps of stepping motor and mobile terminal |
| CN110602296B (en) * | 2019-09-17 | 2021-01-15 | 深圳市万普拉斯科技有限公司 | Method and device for calibrating motion steps of stepping motor and mobile terminal |
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