描述
系統(tǒng)在機(jī)械參數(shù)設(shè)定好后,首先根據(jù)基板的劃線數(shù)據(jù)進(jìn)行編程,確定劃線的數(shù)據(jù)、MARK點(diǎn)的數(shù)據(jù)、使用刀的數(shù)量、每把刀劃每條線的壓力、劃線的次數(shù)等,以上參數(shù)有專門的軟件進(jìn)行編輯。編輯完成后再通過PC1輸入PLC的CPU,在完成數(shù)據(jù)的編輯后,軟件回自動(dòng)生成切割的模擬畫面,確定基板劃線的每一步由哪幾把刀去做,在完成這一系列的工作后,就要放入基板試作劃線,根據(jù)系統(tǒng)設(shè)定,在放入基板后按下啟動(dòng)按鈕,基板平臺(tái)會(huì)自動(dòng)把基板送到影像處理系統(tǒng)的CCD的下面,在監(jiān)視器上面看到的就如圖4所示,在MARK識(shí)別中與系統(tǒng)設(shè)定會(huì)有一個(gè)的偏差,根據(jù)這個(gè)偏差系統(tǒng)進(jìn)行補(bǔ)正,現(xiàn)介紹一下補(bǔ)正過程,如圖7,以第一把刀為例,刀1原點(diǎn)與CCD原點(diǎn)的X向距離D1在系統(tǒng)中設(shè)定為一定值,刀1與刀1原點(diǎn)的距離D2為在編制程序是產(chǎn)生,也為一定值,CCD原點(diǎn)與現(xiàn)在CCD之間的距離D3,在編制程序時(shí)有一個(gè)MARK的坐標(biāo)值,D3即為基板的X向MARK坐標(biāo),D4為MARK點(diǎn)與刀1劃基板第一道線X向距離,在理想狀態(tài)下為一定值。即可以得出D1+D2=D3+D4,其中D1、D2為固定值,假設(shè)D5為CCD識(shí)別MARK點(diǎn)的動(dòng)態(tài)坐標(biāo),偏差補(bǔ)正為△d,可以得出D5=D3±△d,如在理想狀態(tài),CCD識(shí)別MARK點(diǎn)的X向坐標(biāo)剛好為D3,即D5=D3,而每塊基板在放置的時(shí)候位置絕對(duì)會(huì)不一樣,所以都會(huì)有一個(gè)偏差△d,根據(jù)△d每次在CCD識(shí)別MARK點(diǎn)后向刀1移動(dòng)的距離為D4±△d,這就是偏差補(bǔ)正的過程,其他的刀原理也是這樣,在偏轉(zhuǎn)劃線時(shí)也是根據(jù)CCD第一次MARK識(shí)別的坐標(biāo)了確定的。在劃完了TFT面后,在CF面對(duì)TFT面進(jìn)行剖斷,然后在CF面劃線,再在TFT面對(duì)CF進(jìn)行剖斷,這樣就完成了對(duì)基板的劃線。
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