FANUC 0系統(tǒng)401號(hào)報(bào)警的故障維修
【故障現(xiàn)象】：MDD090B-N-030-N2L-110PA0一臺(tái)配套FANUC 0系統(tǒng)的數(shù)控磨床，開(kāi)機(jī)后出現(xiàn)401號(hào)報(bào)警。
【分析與處理過(guò)程】：FANUC 0數(shù)控系統(tǒng)的401號(hào)報(bào)警屬于數(shù)字伺服報(bào)警，該報(bào)警的含義為“X、Z軸伺服放大器未準(zhǔn)備好”。遇到此類(lèi)報(bào)警通常作如下檢查：首先查看伺服放大器的LED有無(wú)顯示，若有顯示，則故障原因有以下3種可能：
1)伺服放大器至Power Mate之間的電纜斷線。
2)伺服放大器出故障。
3)基板出故障。
MDD090B-N-030-N2L-110PA0若伺服放大器的LED無(wú)顯示，則應(yīng)檢查伺服放大器的電源電壓是否正常，電壓正常則說(shuō)明伺服放大器有故障：電壓不正常就基本排除了伺服放大器有故障的可能，應(yīng)繼續(xù)檢查強(qiáng)電電路。
根據(jù)上述排查故障的思路進(jìn)行診斷，經(jīng)檢查發(fā)現(xiàn)伺服放大器的LED無(wú)顯示，檢查伺服放大器的輸入電源電壓，發(fā)現(xiàn)+24V的輸入連接線已脫落。重新連接后開(kāi)機(jī)，機(jī)床恢復(fù)正常。
例11．31號(hào)伺服報(bào)警的故障維修
【故障現(xiàn)象】：某配套FANUC 3MA系統(tǒng)的數(shù)控銑床，在運(yùn)行過(guò)程中，Z軸產(chǎn)生3l號(hào)報(bào)警。
【分析及處理過(guò)程】：MDD090B-N-030-N2L-110PA0查維修手冊(cè)，31號(hào)報(bào)警的含義為“誤 差寄存器的內(nèi)容大于規(guī)定值”。根據(jù)31號(hào)報(bào)警提示，將誤差定值放大，于是將31號(hào)報(bào)警對(duì)應(yīng)的機(jī)床參數(shù)由2000改為5000，然后用手搖脈沖發(fā)生器驅(qū)動(dòng)Z 軸，發(fā)現(xiàn)31號(hào)報(bào)警消除，但又產(chǎn)生了32號(hào)報(bào)警。32號(hào)報(bào)警意為“Z軸誤差寄存器的內(nèi)容超過(guò)±32767，或數(shù)模轉(zhuǎn)換的命令值超出了 -8192~+8191的范圍”。為此將設(shè)定的機(jī)床參數(shù)由5000再改為3000，32號(hào)報(bào)警消除，但31號(hào)報(bào)警又出現(xiàn)，故暫無(wú)法排除故障。
MDD090B-N-030-N2L-110PA0誤差寄存器是用來(lái)存放指令值與位置反饋值之差的，當(dāng)位置檢測(cè)裝置或位置控制單元故障時(shí)，就會(huì)引起誤差寄存器的超差，故將故障定位在位置控制上。
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