【分析及處理過程】:MDD065B-N-040-N2L-095GA0查詢NC l04報(bào)警,其含義為“X軸測(cè)量系統(tǒng)電纜斷線”。
根 據(jù)故障現(xiàn)象和報(bào)警,我們先檢查讀數(shù)頭和光柵尺,光柵密封良好,里面潔凈,讀數(shù)頭和光柵沒有受到污染,并且讀數(shù)頭和光柵正常;隨后檢查測(cè)量電路板,經(jīng)檢查未 發(fā)現(xiàn)不良現(xiàn)象,經(jīng)過這些工作后,把重點(diǎn)放在反饋電纜上。測(cè)量反饋端子,發(fā)現(xiàn)13號(hào)線電壓不穩(wěn),停電后測(cè)量13號(hào)線,發(fā)現(xiàn)有較大電阻,經(jīng)仔細(xì)檢查,發(fā)現(xiàn)此線 在X軸運(yùn)動(dòng)過程中有一處斷路,造成反饋值不穩(wěn),偏離其實(shí)際值。經(jīng)重新接線后,機(jī)床故障消除。
例7.快速移動(dòng)時(shí)出現(xiàn)414和410號(hào)報(bào)警的故障維修
【故障現(xiàn)象】:MDD065B-N-040-N2L-095GA0某配套FANUC 0M系統(tǒng)的立式加工中心,X軸快速移動(dòng)時(shí)出現(xiàn)414和410號(hào)報(bào)警。
【分析及處理過程】:414和410號(hào)報(bào)警的含義是“速度控制OFF”和“X軸伺服驅(qū)動(dòng)異?!?。鑒于此機(jī)床在故障出現(xiàn)后能通過重新起動(dòng)消除,但每次執(zhí)行X軸快速移動(dòng)時(shí)就報(bào)警,故初步判定故障與伺服電動(dòng)機(jī)有關(guān)。檢查伺服電動(dòng)機(jī)電源線插頭,發(fā)現(xiàn)存在相間短路;重新連接后,故障排除。
例8;414、401號(hào)報(bào)警的故障維修
【故障現(xiàn)象】:MDD065B-N-040-N2L-095GA0一臺(tái)配套FANUC 0系統(tǒng)的數(shù)控車床,開機(jī)后就出現(xiàn)414、401號(hào)報(bào)警。
【分析與處理過程】:FANUC0數(shù)控系統(tǒng)的414、 401號(hào)報(bào)警屬于數(shù)字伺服報(bào)警,報(bào)警的具體含義分別是“X、Z位置測(cè)量系統(tǒng)出錯(cuò)”,“X、Z軸伺服放大器未準(zhǔn)備好”。向操作人員詢問得知,因工廠基建,該 機(jī)床剛搬至新址不久,第一次開機(jī)就出現(xiàn)上述狀況,此前該機(jī)床工作一直很穩(wěn)定,因此懷疑在搬運(yùn)過程中導(dǎo)致電動(dòng)機(jī)、驅(qū)動(dòng)器等元器件的連接損壞。用萬用表測(cè)量電 動(dòng)機(jī)各電纜的連接,經(jīng)檢查未發(fā)現(xiàn)異常。將插頭插拔確認(rèn)連接牢固、無錯(cuò)誤后再開機(jī),報(bào)警仍未解除。于是,按“SYSTEM”鍵進(jìn)入系統(tǒng)自診斷功能,檢查 0200號(hào)參數(shù),發(fā)現(xiàn)該參數(shù)第6位顯示為“1”及“#6(LV)=1,參閱維修手冊(cè),提示此時(shí)為低電壓報(bào)警。檢查驅(qū)動(dòng)器輸入電壓,發(fā)現(xiàn)無輸入電壓:依據(jù)電 器原理圖繼續(xù)檢查,發(fā)現(xiàn)空氣開關(guān)QF4始終處于斷開狀態(tài)。更換新的開關(guān),重新開機(jī),機(jī)床恢復(fù)正常工作。
例9. FANUC 0系統(tǒng)351號(hào)報(bào)警的故障維修
【故障現(xiàn)象】:MDD065B-N-040-N2L-095GA0一臺(tái)配套FANUC 0系統(tǒng)的數(shù)控磨床,國(guó)慶長(zhǎng)假后第一次開機(jī)出現(xiàn)351號(hào)報(bào)警。
【分析與處理過程】:FANUC0數(shù)控系統(tǒng)的351號(hào)報(bào)警 屬于數(shù)字伺服報(bào)警,該報(bào)警的含義為“串行脈沖編碼器通信出現(xiàn)錯(cuò)誤”。向工作人員了解情況后得知,放假前對(duì)該機(jī)床進(jìn)行了維護(hù)、保養(yǎng),并對(duì)電氣柜進(jìn)行了打掃, 因此首先懷疑是工作人員在打掃過程中誤碰驅(qū)動(dòng)器的連接線導(dǎo)致該報(bào)警的產(chǎn)生。將驅(qū)動(dòng)器的連接插頭重新連接牢固后重新開機(jī),報(bào)警解除。數(shù)日后報(bào)警又出現(xiàn),再次 連接驅(qū)動(dòng)器插頭仍無法解除報(bào)警。于是按“SYSTEM”鍵進(jìn)入系統(tǒng)自診斷功能,檢查0203參數(shù),發(fā)現(xiàn)該參數(shù)第7位顯示為“1”及“#7(DTE)=1, 提示為串行脈沖編碼器無響應(yīng)。導(dǎo)致此類狀況的原因有:
1)信號(hào)反饋電纜斷線。
2)串行脈沖編碼器的+5V電壓過低。
3)串行脈沖編碼器出錯(cuò)。
MDD065B-N-040-N2L-095GA0檢查信號(hào)反饋電纜,拆下Z軸信號(hào)反饋電纜插頭即發(fā)現(xiàn)插頭內(nèi)有數(shù)根電線脫落。重新連接后再開機(jī),報(bào)警解除,機(jī)床恢復(fù)正常工作。
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