CNC系統的日常維護主要包括以下幾方面：
1.嚴格制訂并且執行CNC系統的日常維護的規章制度
根據不同數控機床的性能特點，嚴格制訂其CNC系統的日常維護的規章制度，并且在使用和操作中要嚴格執行。
2.應盡量少開數控柜門和強電柜的門
因為，在機械加工車間的空氣中往往含有油霧、塵埃，它們一旦落入數控系統的印刷線路板或者電氣元件上，則易引起元器件的絕緣電阻下降，甚至導致線路板或者電氣元件的損壞。所以，在工作中應盡量少開數控柜門和強電柜的門。
3.定時清理數控裝置的散熱通風系統，以防止數控裝置過熱
散熱通風系統是防止數控裝置過熱的重要裝置。為此，應每天檢查數控柜上各個冷卻風扇運轉是否正常，每半年或者一季度檢查一次風道過濾器是否有堵塞現象，如果有則應及時清理。
4.注意CNC系統的輸入/輸出裝置的定期維護
例如CNC系統(tong)的輸入裝(zhuang)置中磁頭的清洗。

5.定(ding)期(qi)檢(jian)查和更換直流電(dian)機(ji)電(dian)刷
在20世紀(ji)80年代(dai)生產的數控機床(chuang)，大多數采用(yong)直流伺(si)服(fu)電(dian)機，這就存在電(dian)刷的磨損問題(ti)，為此(ci)對于直流伺(si)服(fu)電(dian)機需要定期(qi)檢(jian)查和更(geng)換直流電(dian)機電(dian)刷。
6.經常監(jian)視CNC裝置用的(de)電(dian)(dian)網(wang)電(dian)(dian)壓
CNC系(xi)(xi)統(tong)對工(gong)作(zuo)電(dian)(dian)(dian)(dian)網(wang)電(dian)(dian)(dian)(dian)壓(ya)有嚴格的要(yao)(yao)求。例如(ru)FANUC公司生產的CNC系(xi)(xi)統(tong)，允許電(dian)(dian)(dian)(dian)網(wang)電(dian)(dian)(dian)(dian)壓(ya)在(zai)(zai)額(e)定(ding)值的85％～110％的范圍(wei)內波動，否則會造成(cheng)CNC系(xi)(xi)統(tong)不能正常(chang)工(gong)作(zuo)，甚至會引起CNC系(xi)(xi)統(tong)內部電(dian)(dian)(dian)(dian)子元件的損(sun)壞。為此要(yao)(yao)經常(chang)檢測電(dian)(dian)(dian)(dian)網(wang)電(dian)(dian)(dian)(dian)壓(ya)，并(bing)控制在(zai)(zai)定(ding)額(e)值的–15％～+10％內。
7.存儲器用電池(chi)的定期(qi)檢查和更換
通常，CNC系統中(zhong)部分(fen)CMOS存儲(chu)(chu)器中(zhong)的存儲(chu)(chu)內容在斷(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)靠電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)供電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)保持。一(yi)(yi)(yi)般(ban)采用鋰電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)或者可(ke)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的鎳鎘電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)。當電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)下(xia)降(jiang)到(dao)一(yi)(yi)(yi)定(ding)值(zhi)時(shi)，就(jiu)會(hui)造成(cheng)數據(ju)丟失，因此(ci)要定(ding)期(qi)檢查電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)。當電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)下(xia)降(jiang)到(dao)限(xian)定(ding)值(zhi)或者出(chu)現電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)(ya)報(bao)警時(shi)，就(jiu)要及時(shi)更(geng)換電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)。更(geng)換電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)時(shi)一(yi)(yi)(yi)般(ban)要在CNC系統通電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)態下(xia)進行，這才不會(hui)造成(cheng)存儲(chu)(chu)參(can)數丟失。一(yi)(yi)(yi)旦數據(ju)丟失，在調換電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)后(hou)，可(ke)重新就(jiu)參(can)數輸(shu)入。
8.CNC系(xi)統長(chang)期不用時的(de)維護
當數(shu)控機(ji)床(chuang)長期(qi)閑置不用(yong)時(shi)(shi)，也要定期(qi)對CNC系統進(jin)行維護(hu)保養。在機(ji)床(chuang)未通電(dian)(dian)時(shi)(shi)，用(yong)備份電(dian)(dian)池給芯片供電(dian)(dian)，保持數(shu)據不變。機(ji)床(chuang)上(shang)電(dian)(dian)池在電(dian)(dian)壓過低時(shi)(shi)，通常會在顯(xian)示屏幕上(shang)給出報(bao)警提示。在長期(qi)不使(shi)用(yong)時(shi)(shi)，要經(jing)常通電(dian)(dian)檢查是否有報(bao)警提示，并(bing)及時(shi)(shi)更(geng)換備份電(dian)(dian)池。經(jing)常通電(dian)(dian)可以防止電(dian)(dian)器元件受潮或印(yin)制(zhi)板受潮短(duan)路(lu)(lu)或斷路(lu)(lu)等長期(qi)不用(yong)的(de)機(ji)床(chuang)，每(mei)周至少通電(dian)(dian)兩次以上(shang)。具體做法(fa)是：
首(shou)先，應經常給CNC系統(tong)通電，在(zai)機床鎖住不(bu)動的(de)情況(kuang)下，讓機床空運行。其次，在(zai)空氣(qi)濕度較(jiao)大的(de)梅(mei)雨季節，應天(tian)天(tian)給CNC系統(tong)通電，這樣可利(li)用電器元件(jian)本身(shen)的(de)發熱來驅走數(shu)控(kong)柜(ju)內的(de)潮氣(qi)，以**電器元件(jian)的(de)性能穩(wen)定可靠。生產(chan)實(shi)踐證明，如(ru)果(guo)長期不(bu)用的(de)數(shu)控(kong)機床，過了(le)梅(mei)雨天(tian)后則往(wang)往(wang)一開機就(jiu)容易發生故障。
此(ci)外，對于采用直流伺服(fu)電(dian)動機(ji)(ji)的數控機(ji)(ji)床(chuang)，如果閑置(zhi)半年以上不(bu)用，則(ze)應將電(dian)動機(ji)(ji)的電(dian)刷取出(chu)來，以避免由(you)于化學腐(fu)蝕作用而導致換向器表面的腐(fu)蝕，**換向性能。
9.備用(yong)印刷(shua)線(xian)路板(ban)的維護
對于已購置(zhi)的(de)備用印刷(shua)線路板應定期裝到CNC裝置(zhi)上(shang)通電運行一段時間，以防(fang)損(sun)壞。
10.CNC發生故障時的處理(li)
一(yi)旦CNC系統(tong)發生(sheng)故障，操(cao)作人(ren)員應采取(qu)急停(ting)(ting)措(cuo)施，停(ting)(ting)止系統(tong)運(yun)行，并且保護好現場(chang)。并且協助維修人(ren)員做好維修前期的準備工作。

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