西門子828D鉆攻中心系統開不了機；啟動屏幕(mu)不亮(liang)，上電后不啟動恒稅電氣一(yi)天內(nei)均(jun)可修復(fu)，故障分析(xi)處理；

。下面，我們簡單(dan)分析一下這種(zhong)故障(zhang)出現的(de)各種(zhong)誘因。以幫(bang)助用戶更快的(de)找以故障(zhang)點。

       1.常(chang)(chang)見的一(yi)種是(shi)電源問題。828D有專門的供(gong)電模(mo)塊，如果PCU單元沒(mei)法(fa)開機，*時間先(xian)拆開外殼(ke)檢(jian)查供(gong)電模(mo)塊的三組電壓是(shi)否正常(chang)(chang)，分別是(shi)+5V、+15V、-15V。如果電源正常(chang)(chang)再去檢(jian)查其他部分。

       2.西門子(zi)828D數控系統黑(hei)(hei)屏也(ye)可(ke)能是顯示屏部分出了故(gu)障。先檢查(cha)高壓條是否(fou)工作，查(cha)看燈管是否(fou)燒黑(hei)(hei)。  這個都可(ke)以通過更換(huan)高壓條和燈管進(jin)行(xing)排除確認(ren)。

       3.如果以(yi)上(shang)兩步都沒問(wen)題，那么，故障點查(cha)(cha)(cha)找就放在主(zhu)板(ban)(ban)上(shang)了。查(cha)(cha)(cha)看主(zhu)板(ban)(ban)主(zhu)電壓(ya)(ya)+5V和+3.3V電壓(ya)(ya)是否(fou)(fou)正常；查(cha)(cha)(cha)看主(zhu)板(ban)(ban)電容(rong)是否(fou)(fou)有明顯(xian)老(lao)化；查(cha)(cha)(cha)看主(zhu)板(ban)(ban)存儲器法拉(la)電容(rong)是否(fou)(fou)夠電壓(ya)(ya)；用示波器檢測CPU是否(fou)(fou)有工(gong)作(zuo)波形(xing)。做完以(yi)上(shang)檢查(cha)(cha)(cha)排除，故障點基本(ben)上(shang)能夠確定(ding)的。

 西門子828D鉆攻中心系統開不了機；

在我們(men)的伺(si)服系統應用(yong)中，經常會遇到干擾問(wen)題，導致不可預(yu)知的故障(zhang)或警(jing)報，使伺(si)服系統不能以定的(de)方式正常工(gong)作，甚至燒(shao)毀驅(qu)動器，并且問(wen)題的(de)原(yuan)因也很難消除。在查閱相關(guan)資(zi)料和(he)處(chu)理(li)工(gong)作中(zhong)干(gan)擾(rao)(rao)問(wen)題的(de)一些經驗后，結合氬(ya)弧焊(han)機最(zui)近(jin)遇(yu)到的(de)干(gan)擾(rao)(rao)問(wen)題，探討如(ru)何處(chu)理(li)干(gan)擾(rao)(rao)。

二、氬弧焊機(ji)產(chan)生(sheng)的(de)干擾源

氬(ya)弧(hu)(hu)焊(han)機(ji)(ji)采用(yong)高(gao)(gao)頻(pin)引(yin)弧(hu)(hu)。在(zai)引(yin)弧(hu)(hu)過程中，在(zai)鎢(wu)電(dian)(dian)(dian)極的(de)端部與(yu)焊(han)接(jie)表面之(zhi)間(jian)保持一定的(de)小間(jian)隙(xi)(xi)，然后接(jie)通(tong)高(gao)(gao)頻(pin)振蕩器脈(mo)沖(chong)引(yin)弧(hu)(hu)電(dian)(dian)(dian)路，使間(jian)隙(xi)(xi)擊穿放(fang)電(dian)(dian)(dian)，引(yin)燃電(dian)(dian)(dian)弧(hu)(hu)，產生(sheng)高(gao)(gao)壓電(dian)(dian)(dian)擊穿。其(qi)次(ci)是大電(dian)(dian)(dian)流(liu)(liu)傳導和穩定電(dian)(dian)(dian)弧(hu)(hu)。當鎢(wu)極氬(ya)弧(hu)(hu)焊(han)機(ji)(ji)采用(yong)高(gao)(gao)頻(pin)引(yin)弧(hu)(hu)時，由于(yu)焊(han)機(ji)(ji)采用(yong)幾十萬(wan)Hz的(de)頻(pin)率和幾千伏的(de)高(gao)(gao)頻(pin)高(gao)(gao)壓穿透(tou)氣隙(xi)(xi)，高(gao)(gao)頻(pin)引(yin)弧(hu)(hu)強。我是一個(ge)圓(yuan)弧(hu)(hu)。諧波(bo)干擾源。弧(hu)(hu)焊(han)逆變電(dian)(dian)(dian)源本質(zhi)上是一種(zhong)用(yong)于(yu)電(dian)(dian)(dian)網的(de)大整流(liu)(liu)電(dian)(dian)(dian)源。由于(yu)電(dian)(dian)(dian)力電(dian)(dian)(dian)子元件在(zai)換(huan)向過程中產生(sheng)非(fei)常(chang)陡峭的(de)脈(mo)沖(chong)，因此會產生(sheng)嚴(yan)(yan)重的(de)諧波(bo)干擾。逆變器的(de)輸(shu)入電(dian)(dian)(dian)流(liu)(liu)是一個(ge)銳角波(bo)，這使得電(dian)(dian)(dian)網包含很多高(gao)(gao)次(ci)諧波(bo)。電(dian)(dian)(dian)壓諧波(bo)與(yu)電(dian)(dian)(dian)流(liu)(liu)諧波(bo)之(zhi)間(jian)存在(zai)嚴(yan)(yan)重的(de)相移，導致焊(han)機(ji)(ji)的(de)功率因數非(fei)常(chang)低。

三、處(chu)理干(gan)擾的(de)措施

在(zai)(zai)(zai)這種情況(kuang)下，氬弧(hu)(hu)焊機電(dian)(dian)(dian)(dian)(dian)源(yuan)與伺服(fu)驅(qu)動(dong)電(dian)(dian)(dian)(dian)(dian)源(yuan)分(fen)開(kai)供電(dian)(dian)(dian)(dian)(dian)。氬弧(hu)(hu)焊機的電(dian)(dian)(dian)(dian)(dian)源(yuan)由隔離變壓器(qi)(qi)(qi)隔離。伺服(fu)電(dian)(dian)(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)套在(zai)(zai)(zai)扼(e)流圈中，送至有源(yuan)電(dian)(dian)(dian)(dian)(dian)力濾(lv)波(bo)器(qi)(qi)(qi)。濾(lv)波(bo)后，將其發送到(dao)開(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)源(yuan)。伺服(fu)驅(qu)動(dong)器(qi)(qi)(qi)的電(dian)(dian)(dian)(dian)(dian)源(yuan)和控制(zhi)電(dian)(dian)(dian)(dian)(dian)源(yuan)分(fen)別(bie)由兩個開(kai)關(guan)電(dian)(dian)(dian)(dian)(dian)源(yuan)供電(dian)(dian)(dian)(dian)(dian)，并且分(fen)別(bie)在(zai)(zai)(zai)驅(qu)動(dong)器(qi)(qi)(qi)前設置(zhi)扼(e)流圈。驅(qu)動(dong)電(dian)(dian)(dian)(dian)(dian)源(yuan)和控制(zhi)（編碼器(qi)(qi)(qi)）電(dian)(dian)(dian)(dian)(dian)源(yuan)都連接(jie)到(dao)屏(ping)蔽電(dian)(dian)(dian)(dian)(dian)纜(lan)(lan)上，確保(bao)單(dan)端可(ke)靠接(jie)地。

應用場地干(gan)擾源

1. 空間(jian)輻(fu)射干擾

空間輻射(she)電磁場主要由電網、閃電、無(wu)線電廣播和雷達(da)產生(sheng)，通(tong)(tong)(tong)常稱為輻射(she)干(gan)擾(rao)。這種(zhong)影響主要取(qu)決于兩條路(lu)徑：一條是(shi)直接輻射(she)到(dao)內部伺(si)服，引起電路(lu)干(gan)擾(rao)；另一條是(shi)輻射(she)到(dao)伺(si)服通(tong)(tong)(tong)信網絡，這是(shi)由通(tong)(tong)(tong)信線路(lu)引起的。這種(zhong)干(gan)擾(rao)的概(gai)率相對較小，通(tong)(tong)(tong)常通(tong)(tong)(tong)過提供屏(ping)蔽電纜來保護(hu)。

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