西門子828D鉆攻中心系統開不了機；啟動屏幕不(bu)亮，上電后(hou)不(bu)啟動恒稅電氣(qi)一(yi)天(tian)內均可(ke)修復，故障分析處理；

。下面，我們簡單分析一下這種故(gu)障出現的各(ge)種誘因。以幫助用戶更快(kuai)的找以故(gu)障點(dian)。

       1.常見的(de)(de)一種(zhong)是電(dian)(dian)源問題。828D有專(zhuan)門(men)的(de)(de)供電(dian)(dian)模塊，如(ru)果PCU單元沒法(fa)開機(ji)，*時間先拆開外(wai)殼檢查(cha)供電(dian)(dian)模塊的(de)(de)三組電(dian)(dian)壓是否正常，分(fen)別是+5V、+15V、-15V。如(ru)果電(dian)(dian)源正常再(zai)去檢查(cha)其他部分(fen)。

       2.西門子828D數(shu)控系統黑屏也可能(neng)是(shi)顯示屏部(bu)分出了故障(zhang)。先檢(jian)查(cha)高壓(ya)條(tiao)是(shi)否工作，查(cha)看燈管(guan)是(shi)否燒黑。  這個都可以通過更換高壓(ya)條(tiao)和燈管(guan)進行排除確(que)認。

       3.如果以上(shang)兩步都沒問題(ti)，那么，故障(zhang)點查(cha)找就放在主(zhu)板(ban)上(shang)了。查(cha)看主(zhu)板(ban)主(zhu)電壓+5V和+3.3V電壓是(shi)否正常(chang)；查(cha)看主(zhu)板(ban)電容是(shi)否有明(ming)顯老化；查(cha)看主(zhu)板(ban)存儲器法拉電容是(shi)否夠電壓；用示波器檢測CPU是(shi)否有工作(zuo)波形(xing)。做完以上(shang)檢查(cha)排除(chu)，故障(zhang)點基(ji)本上(shang)能夠確(que)定的。

 西門子828D鉆攻中心系統開不了機；

在我們的伺(si)服系統應用中，經(jing)常會遇到干擾問(wen)題，導致不可預知的故障(zhang)或(huo)警報(bao)，使伺(si)服系統不能以定的方式正常(chang)工作，甚至燒毀驅動器(qi)，并且問題(ti)的原(yuan)因也很難(nan)消除。在查(cha)閱相關資(zi)料和處(chu)理(li)工作中干擾問題(ti)的一些經驗后，結合氬弧焊機最近遇(yu)到的干擾問題(ti)，探討如(ru)何處(chu)理(li)干擾。

二、氬弧(hu)焊機(ji)產生的干擾(rao)源

氬弧(hu)(hu)(hu)焊(han)機(ji)(ji)采用(yong)高頻(pin)(pin)引(yin)弧(hu)(hu)(hu)。在(zai)引(yin)弧(hu)(hu)(hu)過(guo)程(cheng)中，在(zai)鎢(wu)電(dian)(dian)(dian)(dian)極的(de)端部(bu)與(yu)焊(han)接表(biao)面之間(jian)(jian)保持(chi)一(yi)(yi)定(ding)的(de)小間(jian)(jian)隙(xi)(xi)，然后接通高頻(pin)(pin)振蕩器(qi)脈(mo)沖引(yin)弧(hu)(hu)(hu)電(dian)(dian)(dian)(dian)路，使間(jian)(jian)隙(xi)(xi)擊穿放電(dian)(dian)(dian)(dian)，引(yin)燃電(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)，產生(sheng)高壓(ya)電(dian)(dian)(dian)(dian)擊穿。其次是(shi)大電(dian)(dian)(dian)(dian)流(liu)(liu)傳導和穩定(ding)電(dian)(dian)(dian)(dian)弧(hu)(hu)(hu)。當(dang)鎢(wu)極氬弧(hu)(hu)(hu)焊(han)機(ji)(ji)采用(yong)高頻(pin)(pin)引(yin)弧(hu)(hu)(hu)時，由于焊(han)機(ji)(ji)采用(yong)幾(ji)十萬Hz的(de)頻(pin)(pin)率和幾(ji)千伏的(de)高頻(pin)(pin)高壓(ya)穿透氣隙(xi)(xi)，高頻(pin)(pin)引(yin)弧(hu)(hu)(hu)強。我是(shi)一(yi)(yi)個(ge)圓弧(hu)(hu)(hu)。諧波(bo)干(gan)擾源(yuan)。弧(hu)(hu)(hu)焊(han)逆(ni)變電(dian)(dian)(dian)(dian)源(yuan)本質(zhi)上(shang)是(shi)一(yi)(yi)種用(yong)于電(dian)(dian)(dian)(dian)網(wang)的(de)大整流(liu)(liu)電(dian)(dian)(dian)(dian)源(yuan)。由于電(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)子元件在(zai)換向過(guo)程(cheng)中產生(sheng)非常陡(dou)峭的(de)脈(mo)沖，因此會產生(sheng)嚴重的(de)諧波(bo)干(gan)擾。逆(ni)變器(qi)的(de)輸入電(dian)(dian)(dian)(dian)流(liu)(liu)是(shi)一(yi)(yi)個(ge)銳角波(bo)，這使得電(dian)(dian)(dian)(dian)網(wang)包含很多高次諧波(bo)。電(dian)(dian)(dian)(dian)壓(ya)諧波(bo)與(yu)電(dian)(dian)(dian)(dian)流(liu)(liu)諧波(bo)之間(jian)(jian)存在(zai)嚴重的(de)相移，導致(zhi)焊(han)機(ji)(ji)的(de)功(gong)率因數非常低。

三(san)、處(chu)理(li)干擾的(de)措施

在這種情況下(xia)，氬(ya)弧(hu)焊機電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)與伺服(fu)驅動(dong)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)分開(kai)(kai)供(gong)電(dian)(dian)(dian)(dian)(dian)。氬(ya)弧(hu)焊機的電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)由隔離變壓器(qi)(qi)隔離。伺服(fu)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)纜套(tao)在扼流圈中，送至有(you)源(yuan)(yuan)電(dian)(dian)(dian)(dian)(dian)力濾波(bo)器(qi)(qi)。濾波(bo)后，將其(qi)發(fa)送到開(kai)(kai)關電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)。伺服(fu)驅動(dong)器(qi)(qi)的電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)和控制電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)分別(bie)由兩個(ge)開(kai)(kai)關電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)供(gong)電(dian)(dian)(dian)(dian)(dian)，并(bing)且分別(bie)在驅動(dong)器(qi)(qi)前設置扼流圈。驅動(dong)電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)和控制（編(bian)碼器(qi)(qi)）電(dian)(dian)(dian)(dian)(dian)源(yuan)(yuan)都連接(jie)到屏蔽電(dian)(dian)(dian)(dian)(dian)纜上，確保(bao)單端(duan)可靠接(jie)地。

應用場地干擾源

1. 空(kong)間輻射干擾

空間輻(fu)(fu)射電(dian)磁場(chang)主要由電(dian)網、閃電(dian)、無線電(dian)廣(guang)播和(he)雷達產生，通常(chang)稱為輻(fu)(fu)射干(gan)擾。這(zhe)種(zhong)影響主要取決于兩條路(lu)(lu)徑：一條是(shi)直接輻(fu)(fu)射到內(nei)部伺服(fu)，引起(qi)電(dian)路(lu)(lu)干(gan)擾；另一條是(shi)輻(fu)(fu)射到伺服(fu)通信網絡，這(zhe)是(shi)由通信線路(lu)(lu)引起(qi)的。這(zhe)種(zhong)干(gan)擾的概率(lv)相對較小，通常(chang)通過提(ti)供屏蔽電(dian)纜來保護(hu)。

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