伺服電機維修竄動現象
在(zai)進給(gei)時(shi)(shi)出現竄動(dong)(dong)現象,測速信號不穩定,如編碼器(qi)有裂紋;接線(xian)端子接觸不良,如螺釘松動(dong)(dong)等;當竄動(dong)(dong)發生在(zai)由正方向(xiang)(xiang)(xiang)運(yun)動(dong)(dong)與反方向(xiang)(xiang)(xiang)運(yun)動(dong)(dong)的(de)換向(xiang)(xiang)(xiang)瞬間時(shi)(shi),一般是由于(yu)進給(gei)傳動(dong)(dong)鏈(lian)的(de)反向(xiang)(xiang)(xiang)問隙或伺服(fu)驅動(dong)(dong)增益過大所致;
一、伺服電機維修爬行現象
大多發生在起動(dong)(dong)加(jia)速段或低速進(jin)給(gei)時,一般是由于進(jin)給(gei)傳(chuan)動(dong)(dong)鏈的潤滑狀態不(bu)良,伺(si)服(fu)系(xi)統增益(yi)低及外加(jia)負載過(guo)大等因素所致。尤其要注(zhu)意的是,伺(si)服(fu)電(dian)動(dong)(dong)機和滾(gun)珠絲(si)杠聯接用的聯軸器,由于連接松動(dong)(dong)或聯軸器本身的缺(que)陷,如(ru)裂紋等,造成滾(gun)珠絲(si)杠與(yu)伺(si)服(fu)電(dian)動(dong)(dong)機的轉動(dong)(dong)不(bu)同步,從而使進(jin)給(gei)運動(dong)(dong)忽(hu)(hu)快忽(hu)(hu)慢;
二、伺服電機維修振動現象
機床高(gao)速運行(xing)時,可能產生振動(dong),這時就會產生過流報(bao)警(jing)。機床振動(dong)問題一般屬(shu)于(yu)速度(du)問題,所以應尋找速度(du)環問題;
三、伺服電機維修轉矩降低現象
伺(si)服電(dian)(dian)(dian)機(ji)(ji)從額定(ding)堵轉轉矩到(dao)高速運轉時,發現轉矩會(hui)突然降低(di),這時因(yin)(yin)為電(dian)(dian)(dian)動機(ji)(ji)繞(rao)組的散(san)熱(re)損壞和機(ji)(ji)械部分發熱(re)引起的。高速時,電(dian)(dian)(dian)動機(ji)(ji)溫升變大(da),因(yin)(yin)此,正確使用伺(si)服電(dian)(dian)(dian)機(ji)(ji)前一(yi)定(ding)要(yao)對電(dian)(dian)(dian)機(ji)(ji)的負載(zai)進行驗(yan)算;
四、伺服電機維修位置誤差現象
當伺服軸(zhou)運(yun)動超(chao)(chao)過位置允(yun)差(cha)范圍(wei)時(KNDSD100出(chu)廠標準設置PA17:400,位置超(chao)(chao)差(cha)檢測范圍(wei)),伺服驅動器就會出(chu)現“4”號位置超(chao)(chao)差(cha)報警。主要(yao)原因(yin)有:系(xi)統設定的允(yun)差(cha)范圍(wei)小(xiao);伺服系(xi)統增益設置不當;位置檢測裝置有污染;進給傳動鏈(lian)累計誤差(cha)過大等;
五、伺服電機維修不轉現象
數控系(xi)統(tong)到伺(si)(si)(si)(si)服(fu)驅(qu)動(dong)器除了聯結脈(mo)沖+方向信(xin)號外,還有(you)使能(neng)控制(zhi)(zhi)信(xin)號,一般(ban)為(wei)DC+24V繼(ji)電(dian)(dian)器線(xian)圈電(dian)(dian)壓。伺(si)(si)(si)(si)服(fu)電(dian)(dian)動(dong)機(ji)不轉,常(chang)用診斷(duan)方法有(you):檢查數控系(xi)統(tong)是(shi)否(fou)有(you)脈(mo)沖信(xin)號輸出(chu);檢查使能(neng)信(xin)號是(shi)否(fou)接通(tong)(tong);通(tong)(tong)過(guo)液晶屏(ping)觀測系(xi)統(tong)輸入(ru)/出(chu)狀態是(shi)否(fou)滿足進(jin)給軸的(de)起動(dong)條件;對帶電(dian)(dian)磁制(zhi)(zhi)動(dong)器的(de)伺(si)(si)(si)(si)服(fu)電(dian)(dian)動(dong)機(ji)確認制(zhi)(zhi)動(dong)已經打開;驅(qu)動(dong)器有(you)故(gu)障(zhang);伺(si)(si)(si)(si)服(fu)電(dian)(dian)動(dong)機(ji)有(you)故(gu)障(zhang);伺(si)(si)(si)(si)服(fu)電(dian)(dian)動(dong)機(ji)和滾珠絲杠(gang)聯結聯軸節(jie)失效或鍵脫開等。
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