TW426829B - The positioning method and device for the driving mechanism of scanner - Google Patents

Abstract

A positioning method and device for the driving mechanism of scanner which can be used to accurately position the driving mechanism. The driving mechanism includes a base stand, a driving motor which is fixed on the base stand, and a moving part which moves relative to the base stand and is driven by the above mentioned motor. The positioning method and device characterizes in including a first positioning module equipped with the first optical isolator allocated on the moving part and the first photo detector allocated on the base stand. The moving part returns to the origin when the moving part drives the first optical isolator to block the light of the first photo detector; and a second positioning module equipped with the second optical isolator allocated on the axle of the driving motor and the second photo detector allocated on the case of the motor. The starting position of the moving part can thereby be accurately located by the rotation of the rotating axle to drive the second optical isolator to block the light of the second photo detector before scanning.

Description

426829 五、發明說明⑴ [發明領域] 本發明係關於可將掃描器之傳動機構精確定位 器傳動機構之定位方法與裝置。 押描 [習知技術] 在平口式掃描器中’一般均包含一傳動機構，而利用 該傳動機構傳動—移動構件，使固定在該移動構件之光電 轉換模組或待掃描文件之間產生相對移動，以進行掃描動 ί二器還包含有一定位模㉟，讓傳動機構能夠 ,^ 構件歸回到原點，並從原點開始進行文件掃 描。>定位模組包含位於移動構件之光遮斷器與配置 座或外殼之光感測器。當移動構件歸回到原點時，光遮斷 μ轳，耨始丄ϋ 先感測器會送出被遮蔽 的信號掃U便確認移動構件已歸回原點，而停 動。 ^ [發明欲解決之問題] 由於掃描器的解析度越來鉞古 的加工精度亦相對提高。但由於；械：般的：：機構所需 此公差會造成傳動機構在傳動移均會產生公差， 際位置會肖預期掃描纟置產纟誤 _，移動構件的實 ,王 > 差，而影響掃描品質。為 诚I :隹枪晉矣^88年1月13日提出第881 00447號「可依 ί mi 文件影像之影像掃描器」專利，， 技術可有效地解決傳動機構之位置誤差問題。 該 但是上於：般的光感測器會有誤差，其誤差大約為 〇.丨_。對於一般低階（ 3 0 0dpi)之掃描器而言，其誤差大426829 V. Description of the Invention 领域 [Field of the Invention] The present invention relates to a positioning method and a device for positioning a transmission mechanism of a scanner. In the flat-mouth scanner, the “scanning technology” generally includes a transmission mechanism, and the transmission mechanism is used to drive and move the component to generate a relative relationship between the photoelectric conversion module fixed to the moving component or the document to be scanned. Moving for scanning movement The second device also includes a positioning die to allow the transmission mechanism to return the component to the origin and scan the document from the origin. > The positioning module includes a light interrupter located on the moving member and a light sensor configured on the base or housing. When the moving member returns to the origin, the light is interrupted μ 轳, the sensor will send a masked signal to scan U to confirm that the moving member has returned to the origin and stop. ^ [Problems to be Solved by the Invention] As the resolution of the scanner is getting older, the processing accuracy is also relatively improved. However, due to: the mechanical: like :: the tolerance required by the mechanism will cause the transmission mechanism to have tolerances in the transmission movement, the actual position will be different from the expected scanning, production error _, the actual movement of the member, Wang > poor, and Affects scan quality. For the sincerity I: Gun gun 矣 ^ Patent No. 881 00447 "Image Scanner that can be used for mi file images" filed on January 13, 1988. The technology can effectively solve the position error problem of the transmission mechanism. The above but above: the ordinary light sensor will have an error, the error is about 〇. 丨 _. For general low-order (300 dpi) scanners, the error is large

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有鑒於上述問題，本發明之目的是提 可精確定位移動構件之定位方法與裝置。 種傳動機構 [發明概要] ~ 為達成上述目 包含一基座、一固 動而相對於基座移 括一第一定位模組，係具 與配置在基座之第 遮斷器來遮斷第一 點定位；及一第二 的，本 定於基 動之移 軸的第二光遮斷器 由轉轴之轉動帶動 線，來進行移動構 [圖式之簡單說明] 一光感 光感測 定位模 與配置 第二光 件之掃 座之驅 動構件 有配置 測器， 器之光 組，係 在馬達 遮斷器 描起始 描器之傳動 動馬達、及 /該定位裝 在移動構件 藉由移動構 線，來進行 具有配置在 外殼之第二 來遮斷第二 點益殖^位 飛構定位裝置 由前述馬達驅 置之特徵為包 之第一遮斷器 件帶動第一光 移動構件之原 驅動馬達之轉 光感測器，藉 光感測器之光 圖一為本發明傳動機j之定位裝置的立體圖。 圖二為本發明傳動機構的座標_。 圖三為本發明傳動機構的一圖。 圖四為本發明定位方法夕洎辞同。 圖五為本發明傳動機構的在啟動模式A的座標圖β 圖六為本發明傳動機構的在啟動模式Β的座標圖。In view of the above-mentioned problems, an object of the present invention is to provide a positioning method and device for accurately positioning a moving member. A transmission mechanism [outline of invention] ~ In order to achieve the above purpose, a first positioning module is included with respect to the base including a base, a fixed movement, and a second blocker arranged on the base to block the first One-point positioning; and a second, the second light interrupter, which is originally set at the moving axis of the basic movement, is driven by the rotation of the rotating shaft to carry out the moving structure. [Simplified description of the pattern] The driving mechanism of the mold and the scanning base equipped with the second light member is provided with a measuring device, and the light group of the device is a motor driven by a motor interrupter to trace the starting scanning device, and / or the positioning is mounted on the moving member by moving Construct a line to have a second position in the housing to block the second point. The flying position positioning device is driven by the aforementioned motor, and the first blocking device of the package drives the original driving of the first light moving member. The rotation light sensor of the motor, the light diagram of the light sensor 1 is a perspective view of the positioning device of the conveyor j of the present invention. Figure 2 is the coordinate _ of the transmission mechanism of the present invention. Figure 3 is a diagram of the transmission mechanism of the present invention. Fig. 4 shows the same meaning of the positioning method of the present invention. Fig. 5 is a coordinate diagram β of the transmission mechanism of the present invention in the starting mode A Fig. 6 is a coordinate diagram of the transmission mechanism of the present invention in the starting mode B.

^ 2βΒ 2 9^ 2βΒ 2 9

圖七為本發明傳動機構的在啟動模式c的座標圖。 [符號說明] 10基座 11固定座 20驅動馬達 21轉軸 3 1導恶_^ 3 2螺帽 4〇、50定竺模組 41、51光遮斷器 42、52光感測器 [實施例] 爹亏圖一，係顯示本發明掃描器傳動機構之定位裝 置。本發明之掃描器傳動機構包含一基座1〇、固定於該基 座10之驅動馬達2〇、由馬達2〇驅動並配置在固定座u之導 螺桿31、以及在該導螺桿31上左右移動之螺帽（移動構件） 32。光電轉換模組（未圖示）或待掃描文件的滑動座即固 在該螺帽32上。導螺桿31於一 與驅動馬達2〇之齒 輪齒合的齒輪33。驅動馬達2〇即經由減速齒輪組（未圖示） 的傳動來轉動導螺桿31，進而帶動螺帽32移動。 ” 士發明掃描器傳動機構還包含一第一定位模組4〇與一 第二定位模組50。第一定位模組4〇包括位於螺帽32之第一 光遮斷器41與位於基座10之第一光感測器42，並利用第一 光遮斷器41遮住第一光感測器42來摘測螺帽32已歸回原 點°第二定位模級50包括位於驅動馬達20之轉轴21的第二 光遮斷器5。1與位於馬達殼體之*二光感測器52。並利用第 二光㈣器5 1遮住第二光感測器52來偵測螺帽3 2位於掃描 起始點的精確位置。當然:’前述第-定位模組40與-第二FIG. 7 is a coordinate diagram of the transmission mechanism of the present invention in the starting mode c. [Description of symbols] 10 base 11 fixed base 20 drive motor 21 rotating shaft 3 1 evil guide ^ 3 2 nut 40, 50 fixed Zhu module 41, 51 light interrupter 42, 52 light sensor [Example [Daddy] Figure 1 shows the positioning device of the scanner transmission mechanism of the present invention. The scanner transmission mechanism of the present invention includes a base 10, a drive motor 20 fixed to the base 10, a lead screw 31 driven by the motor 20 and arranged on the fixed base u, and left and right on the lead screw 31 Moving nut (moving member) 32. The photoelectric conversion module (not shown) or the slide base of the document to be scanned is fixed on the nut 32. The lead screw 31 is in a gear 33 that meshes with the gear of the drive motor 20. The drive motor 20 rotates the lead screw 31 through the transmission of a reduction gear set (not shown), thereby driving the nut 32 to move. The driver's invention scanner transmission mechanism also includes a first positioning module 40 and a second positioning module 50. The first positioning module 40 includes a first photointerrupter 41 located on the nut 32 and a base 10 is the first light sensor 42, and the first light interrupter 41 is used to cover the first light sensor 42 to remove the nut 32 and return to the origin. The second positioning mode 50 includes the driving motor 20. The second photo-interrupter 5.1 of the rotating shaft 21 and the second photo-sensor 52 located in the motor housing. The second photo-interrupter 51 is used to cover the second photo-sensor 52 to detect the screw. The cap 3 2 is located at the precise position of the scan starting point. Of course: 'the aforementioned first positioning module 40 and the second

426829 五、發明說明（4) 定位模組5.0的光遮斷器與 第一定位模組40的和j 移動構侔之原點歸位I其 大約在0.1 mm左右。而第. 始點精確位置，在每次掃 變化。其誤差範圍如下， 第二光遮斷器51 ，其圓周 6· 4ηππ)，則因一般光感夠 將馬達20轉動一周所驅動 第二定位模組5 0的誤差即 在1步以内。 光感測器的位置可以互換。 用方式與一般掃描器相同係作為 誤差對於4 000 dpi之掃描器而言 二定位模組50係用來偵測掃描起 描時，由原點出發後均需檢測其 若選用半徑6. 4mm的圓盤來作為 長度為 4 0 m m ( 2 * 3. 1 4 1 6 * 器的誤差約為0.1mm，因此只要 的步數設計在400步以下，則該 可控制在0 1 m m以内，亦即控制 然而’假設第一定位模紐^ q的誤差為X e步，例如3 〇 步，且馬達20轉動一圈為τ步，例如2〇〇步，由於第一定位 模組40之定位點有Xe步的誤差，故下—次以不同原點位置 出發時’所偵义到之第二定位模組5 〇的信號變化會有造成 相差T步之虞。$如以圖二為例，當第一次螺帽32以〇為原 點出發時’偵測到第二定位模組50在a位置產生變化；但 是由於第一定位模組的誤差，而使原點介於區域 P(-Xe，Xe)之間，因此當下一次螺帽32以0，為原點出發 時，則偵測到第二定位模組50在a’位置產生變化，此時位 置a與位置a’相差T步，而造成起始點不同。 為了避免因原點誤差而造成起始點相差T步的情形， 本發明提出一種在組裝時只要將第二定位模組5 〇的信號變 化位置避開區域A(0，Xe)及區域C(T-Xe，Xe)之範圍的方426829 V. Description of the invention (4) The origin of the moving structure of the photointerrupter of the positioning module 5.0 and the first positioning module 40 and the home position I, which is about 0.1 mm. And the exact position of the starting point changes in each sweep. The error range is as follows. The circumference of the second photointerrupter 51 is 6 · 4ηππ). The error of the second positioning module 50 driven by one rotation of the motor 20 due to the general light perception is within 1 step. The positions of the light sensors are interchangeable. 4mm 的 Using the same method as the general scanner as the error For the 4 000 dpi scanner, the two positioning module 50 is used to detect when the scan is started, after starting from the origin, it must be detected if the radius is 6. 4mm The disc has a length of 40 mm (2 * 3. 1 4 1 6 * The error of the device is about 0.1 mm, so as long as the number of steps is designed to be less than 400 steps, it can be controlled within 0 1 mm, that is, However, the control assumes that the error of the first positioning module ^ q is X e steps, such as 30 steps, and one rotation of the motor 20 is τ steps, such as 200 steps. Since the positioning points of the first positioning module 40 have Xe step error, so the next time the signal is detected by the second positioning module 50 when starting from a different origin position, there may be a difference of T steps. $ Take the second example as an example, when The first time when the nut 32 started with 0 as the origin, 'the second positioning module 50 was detected to have changed at position a; but due to the error of the first positioning module, the origin was between the area P (-Xe , Xe), so when the next time the nut 32 starts with 0 as the origin, it is detected that the second positioning module 50 is produced at a 'position. At this time, the position a and the position a 'differ by T steps, resulting in different starting points. In order to avoid the situation where the starting points differ by T steps due to the origin error, the present invention proposes a method for assembling the second positioning mode The position of the signal change of group 50 is to avoid the range of area A (0, Xe) and area C (T-Xe, Xe).

P:\99p032.ptd 第7頁 426829 -- 五、發明說明（5) 法’即可確疋螺帽3 2在每次出發接比叮此 二故也^ 可又出發後皆可找到相同的起始 點。而將第二疋位模組5 〇的信轳缕 Λ ^規變化位置避開區域Λ及(：的 方去疋調整第二遮光構件51在轉軸21的相對位置。 u每次組裝時均需調整第二定位模組5〇 =第一光遮斷器51的位置’較為麻煩。因此提出另一種方 =可J需額外調整第二;^位，組5G的第二光遮斷器”的 =二P:正確找到起始點方法是將螺帽”的行程區 =二^域’即區域A、BM，如圖三所示，因此只要確 位模組5〇的信號變化所在之區域範圍，再依據不 =£域’以不同的啟動模式動作即可找出正確的掃描起 择’參考圖二係顯示螺帽3 2的實際座標圖，該座 ::包括區域A、B以及C。假設第一定位模組4〇的誤差步 二驅動馬達20轉動一圈的步數為T，且χ為掃描時的 螺帽32别進方向，則可能原點位置為區域p(_Xe xe)，同 時區域A、B及C的範圍分別定義為（〇，Xe)、（XeT —χ (T-Xe, T) 〇 >，考圖四的流程圖，說明本發明確定第二定位模組 的信號變化所在之區域的方法。在開始之前，假設螺帽32 $由第一定位模組40定位而位於原點〇。其設定步驟如 步驟SI00 :開始，並將移動步數〇設定為零； 步驟S110 :利用驅動馬達20帶動螺帽32朝著X方向 動，G=G+1 >P: \ 99p032.ptd Page 7 426829-V. Description of the invention (5) The method 'can confirm the nut 3 2 every time you start it, you can find it the same, so you can find the same after you start again. Starting point. And change the position of the letter Λ ^ ^ of the second position module 50 to avoid the area Λ and (:) to adjust the relative position of the second light shielding member 51 on the rotating shaft 21. u Each time it is assembled Adjusting the second positioning module 50 = the position of the first light interrupter 51 is more troublesome. Therefore, another method is proposed. The second light interrupter of the group 5G can be adjusted. = Two P: The correct way to find the starting point is to set the travel range of the nut "= Two ^ field ', which is the area A and BM, as shown in Figure 3. Therefore, as long as the signal range of the module 50 is determined, the area range where the signal changes is located. Then, you can find the correct scanning option according to the action of “== domain” in different startup modes. Refer to Figure 2 for the actual coordinates of the nut 32. This block :: includes areas A, B, and C. Assuming that the error of the first positioning module 40 is two, the number of steps for one rotation of the drive motor 20 is T, and χ is the direction in which the nut 32 moves in scanning, the position of the origin may be the area p (_Xe xe). At the same time, the ranges of areas A, B, and C are defined as (0, Xe) and (XeT — χ (T-Xe, T) 〇>). The flowchart of FIG. 4 is used to illustrate the present invention. Method for determining the area where the signal change of the second positioning module is located. Before starting, it is assumed that the nut 32 $ is positioned by the first positioning module 40 and is located at the origin. The setting steps are as step SI00: Start and move The number of steps 0 is set to zero; step S110: the nut 32 is driven in the X direction by the driving motor 20, G = G + 1 >

4 268 29 五*發明說明（6) 步驟S1 2 0 :偵測第二定位模組5〃几是否有信號變化，若 有信號變化則表示第二定位模組5 0的信號變化所在之區域 為區域A，設定啟動模式為A並跳至S2G0 ; 步驟S130 :計算G是否小於Xe，若G<Xe，則跳回 S110 ; 步驟S1 4 0 :利用驅動馬達20帶動螺帽32朝著X方向移 動 ’ G=G+l ; 步驟S1 5 0 :偵測第二定位模組5 〇是否有信號變化，若 有信號變化則則表示第二定位模組5〇的信號變化所在之區 域為區域B ’設定啟動模式為b並跳至s2〇〇 ;、 步驟S160 :計算G是否小於T-Xe，若G<T-Xe，則跳回 S140 ; J u 。步驟S1 70 :則表示第二定位模組5〇的信號變化所在 區域為區域C，設定啟動模式為c ; 步驟S2 0 0 :紀錄啟動模式，並結束 因此，只要掃描器在開始掃描之前根據啟 二，：可在相同的起始點開始掃描，且其起始點 會在一步之内。、 J ^ 以下說明各啟動模式之動作方式。 生在模式首A先2模式中’第二定位模組5°的信號產 反方向移動:驅動馬達2〇先將螺帽32朝著X方向的 五所示丄二可能出發位置調整為區域P’ ’如圖4 268 29 Five * Description of the invention (6) Step S1 2 0: Detect whether there is a signal change in the second positioning module 5; if there is a signal change, it means that the area where the signal of the second positioning module 50 changes is: Area A, set the startup mode to A and skip to S2G0; Step S130: Calculate whether G is less than Xe, if G < Xe, skip back to S110; Step S1 4 0: Use the drive motor 20 to drive the nut 32 to move in the X direction 'G = G + l; Step S1 50: Detect whether there is a signal change in the second positioning module 50. If there is a signal change, it means that the area where the signal change of the second positioning module 50 is located is the area B' Set the startup mode to b and skip to s200; Step S160: Calculate whether G is less than T-Xe. If G < T-Xe, skip back to S140; Ju. Step S1 70: the area where the signal of the second positioning module 50 changes is area C, and the startup mode is set to c; step S2 0 0: the startup mode is recorded and ended. Therefore, as long as the scanner starts scanning according to the startup Second: Scanning can start at the same starting point, and its starting point will be within one step. , J ^ The operation modes of each startup mode are described below. Born in the first mode of the first A mode, the signal of the second positioning module 5 ° moves in the opposite direction: the drive motor 20 first adjusts the nut 32 toward the five directions in the X direction. The second possible starting position is adjusted to area P. '' Figure

^ ^ ^ ，、要朝著X方向移動，必可偵測到在區域A 之第一足位楔組50的信號變化。 隹匕域a^ ^ ^ If you want to move in the X direction, you must detect the signal change of the first foot wedge group 50 in area A. Dagger domain a

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Claims (1)

426329 六、申請專利範圍 1基座、種掃描^器傳動機構之定位裝置，該傳動機構包括一 固疋於基座之驅動馬達、前述馬達帶動並相對於 位—，移動構件、以及一用來對前述移動構件原點歸 一 g ,疋位模組，該定位裝置之特徵為包括♦· 上，藉2ί ί二係配置在前述驅動馬達的轉知與外殼 2 ^订别述移動機構之掃描起始點精確定位^ 二之11Λ利範圍第1項所記載之定位裝置，其中前述第 與：於前述：動：ΐ之轉軸的第二光遮斷器 二定位模組在前述掃描==定位裝置，“前述第 斷器遮住第二光感測号來；^時’利用前述第二光遮 …請專利範圍第1項= ί精確定位。 動構件係可固定光電轉換模組。疋位裝置，其中前述移 -如申請專利範圍第1項所記载之 動構件係可固定待掃描文件。 置’其中前述移 -種一掃描器傳動機構之定位方法 基座、一固定於基座之驅動馬達' 機構包括一 對於基座移動之移動構件、 =述馬達帶動並相 模組、以及配置在前述馬達與構件之第一定位 方法利用前述第二定位模組進行掃；位模组，該 起始點的精確定祕。426329 6. Application scope 1 Base, a positioning device of a scanner driving mechanism, the driving mechanism includes a driving motor fixed to the base, the aforementioned motor drives and relative to the position, a moving member, and a Regarding the original point of the moving member as described above, the positioning device is characterized in that the positioning device includes ♦ · 2 borrows, which are arranged in the drive motor of the aforementioned drive motor and the housing 2 ^ Scanning of other moving mechanisms Precise positioning of the starting point ^ The positioning device described in item 1 of the 2nd scope of the 11th, in which the second and the following: and in the foregoing: moving: the axis of the second optical interrupter, the second positioning module in the foregoing scan == positioning Device, "the aforementioned second interrupter covers the second light sensing number; ^ 'when using the aforementioned second optical shielding ... please patent item 1 = precise positioning. The moving member can fix the photoelectric conversion module. Position Device, in which the aforementioned moving-moving member described in item 1 of the scope of patent application can fix the document to be scanned. Set 'wherein the aforementioned moving-kind of a positioning method of a scanner drive mechanism base, a fixed to the base Drive motor '' The mechanism includes a moving member for the base to move, a motor-driven parallel phase module, and a first positioning method configured on the motor and the component to scan using the second positioning module; a position module, the starting The precise identification of points.