西門子數控(kong)車床維(wei)修,十年維(wei)修品(pin)質,專業技術,硬件故障快速修復(fu),全套測試平臺。
當(dang)我們(men)在使用(yong)數(shu)控(kong)車(che)床的時候難免會遇到一些問題,等待機修維修的時間由比較長,如果我們(men)能掌握一些數(shu)控(kong)車(che)床的維修技巧(qiao),那(nei)么,就不用(yong)浪費那(nei)么多時間等待別(bie)人來維修了。
機(ji)床在運行時機(ji)床照明燈(deng)突然不亮,機(ji)床操(cao)作面板(ban)燈(deng)也不亮,系統電源正常,同時系統急停報警,和主(zhu)軸無信號警。關機(ji)后(hou)重新上電故(gu)障(zhang)依舊。
故障(zhang)分析檢查:經詢問當時操作(zuo)人員,沒(mei)有(you)違(wei)規操作(zuo),排(pai)(pai)除人為原(yuan)(yuan)因(yin),也可以排(pai)(pai)除機(ji)械原(yuan)(yuan)因(yin),應該(gai)是電(dian)(dian)(dian)氣故障(zhang)引起。該(gai)機(ji)床的(de)電(dian)(dian)(dian)器(qi)原(yuan)(yuan)理圖顯示,這些失(shi)電(dian)(dian)(dian)區(qu)(qu)域(yu)都和(he)24V有(you)關(guan),并且該(gai)機(ji)床擁有(you)兩(liang)個穩壓電(dian)(dian)(dian)源(yuan)(yuan),一個是I/O接口電(dian)(dian)(dian)源(yuan)(yuan),另一個為系統電(dian)(dian)(dian)源(yuan)(yuan)。失(shi)電(dian)(dian)(dian)區(qu)(qu)域(yu)都與I/O接口有(you)關(guan),于(yu)是打開電(dian)(dian)(dian)氣柜觀察發(fa)現I/O接口穩壓電(dian)(dian)(dian)源(yuan)(yuan)指示燈(deng)未能點亮,說明該(gai)電(dian)(dian)(dian)源(yuan)(yuan)未能正常工(gong)作(zuo)或損壞(huai)。
由穩壓(ya)電(dian)(dian)(dian)源(yuan)的(de)工作原理(li)知道(dao),穩壓(ya)電(dian)(dian)(dian)源(yuan)有電(dian)(dian)(dian)流短路(lu)(lu)和(he)過(guo)載(zai)(zai)(zai)保護的(de)功能,當電(dian)(dian)(dian)源(yuan)短路(lu)(lu)或過(guo)載(zai)(zai)(zai)時自(zi)動關斷電(dian)(dian)(dian)源(yuan)輸(shu)(shu)出(chu),以(yi)保護電(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)路(lu)(lu)不(bu)被損(sun)壞(huai)。于是(shi)試著把電(dian)(dian)(dian)源(yuan)的(de)輸(shu)(shu)出(chu)負(fu)載(zai)(zai)(zai)線路(lu)(lu)拆下來,結果發現(xian)重(zhong)新上電(dian)(dian)(dian)后電(dian)(dian)(dian)源(yuan)指示燈亮了。這(zhe)說明電(dian)(dian)(dian)源(yuan)本(ben)身沒(mei)有損(sun)壞(huai)。通過(guo)分析得知該電(dian)(dian)(dian)源(yuan)為I/O接口電(dian)(dian)(dian)源(yuan),負(fu)載(zai)(zai)(zai)不(bu)大,也不(bu)會(hui)出(chu)現(xian)過(guo)載(zai)(zai)(zai)現(xian)象,應該是(shi)輸(shu)(shu)出(chu)回路(lu)(lu)中(zhong)有短路(lu)(lu)故障(zhang)。沿著輸(shu)(shu)出(chu)線號進(jin)行(xing)檢查發現(xian)有一根24V+輸(shu)(shu)出(chu)線接頭從(cong)絕緣膠布中(zhong)露出(chu)并接觸到(dao)機(ji)床(chuang)床(chuang)體。
原因(yin)很明顯:由于該(gai)線與機床發生對地短路(lu),造(zao)成該(gai)穩壓電源處于自我保護狀態,使得(de)操作面板和一(yi)些I/O接口(kou)繼電器供電停(ting)止,導致發生以(yi)上故障(zhang)。至于變(bian)頻器報(bao)警可能(neng)24號不(bu)能(neng)到位發出(chu)報(bao)警。
解決辦法(fa):用(yong)絕緣膠布把接頭處重新(xin)包好,重新(xin)上(shang)電開(kai)機(ji)所有故障解決,報警解除照(zhao)明燈也亮了。
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