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西門子數控機床報F207410電流故障修復解決
恒稅(shui)公司是(shi)(shi)國內較早從(cong)事(shi)工控設備維(wei)修(xiu)單位,是(shi)(shi)德國SIEMENS西(xi)(xi)門子維(wei)修(xiu)單位,目前(qian)擁有維(wei)修(xiu)工程師和(he)先進的(de)(de)維(wei)修(xiu)設備,具有豐(feng)富的(de)(de)維(wei)修(xiu)技術和(he)現場診斷經驗。我(wo)們(men)一(yi)直(zhi)專注維(wei)修(xiu)技術的(de)(de)研究,保證不在次損壞機器,不收取(qu)任何(he)檢測費用,維(wei)修(xiu)西(xi)(xi)門子就找專修(xiu)西(xi)(xi)門子公司!
西門子數控機床報F207410電流故障修復解決
檢查電(dian)位(wei)器(qi)時,首先要(yao)轉動(dong)旋(xuan)(xuan)柄,看(kan)看(kan)旋(xuan)(xuan)柄轉動(dong)是(shi)(shi)否(fou)(fou)平滑,開關是(shi)(shi)否(fou)(fou)靈活,開關通、斷時“喀噠(da)"聲是(shi)(shi)否(fou)(fou)清脆(cui),并聽一聽電(dian)位(wei)器(qi)內部接(jie)觸點和電(dian)阻體摩擦(ca)的(de)聲音,如有“沙沙"聲,說明質量不好。用(yong)萬(wan)用(yong)表(biao)測(ce)(ce)試時,先根據被測(ce)(ce)電(dian)位(wei)器(qi)阻值的(de)大小,選擇好萬(wan)用(yong)表(biao)的(de)合(he)適電(dian)阻擋位(wei),然(ran)后(hou)可按下述方法(fa)進行檢測(ce)(ce)。
A、用萬(wan)用表的(de)歐姆擋測“1"、“2"兩端,其讀數應為電位(wei)器的(de)標稱(cheng)阻值,如萬(wan)用表的(de)指針不動(dong)或(huo)阻值相差很多,則表明該電位(wei)器已損壞。
B、檢(jian)測(ce)電(dian)位(wei)(wei)器的(de)活動臂與電(dian)阻(zu)片的(de)接觸(chu)是否良好。用萬用表的(de)歐姆檔測(ce)“1"、“2"(或“2"、“3")兩端,將電(dian)位(wei)(wei)器的(de)轉(zhuan)軸按(an)逆(ni)時針方向旋至(zhi)接近“關"的(de)位(wei)(wei)置,這時電(dian)阻(zu)值(zhi)越小越好。再順時針慢慢旋轉(zhuan)軸柄(bing),電(dian)阻(zu)值(zhi)應逐漸增大,表頭中的(de)指針應平穩移動。當軸柄(bing)旋端位置“3"時,阻值應接近電(dian)位器(qi)(qi)的標稱值。如萬用(yong)表的指針在(zai)電(dian)位器(qi)(qi)的軸柄轉動過程中有(you)跳動現象(xiang),說明活動觸點有(you)接觸不良(liang)的故(gu)障。
5、正溫度(du)系(xi)數熱敏電阻(PTC)的檢測(ce)。
檢測時,用萬用表R×1擋,具體(ti)可分兩步(bu)操作:
A、常(chang)溫檢測(ce)(室(shi)內溫度接近25℃);將兩表筆接觸(chu)PTC熱敏電(dian)阻(zu)的兩引腳測(ce)出(chu)其(qi)實際(ji)阻(zu)值(zhi),并與標稱阻(zu)值(zhi)相(xiang)對比,二者(zhe)相(xiang)差在(zai)±2Ω內即為(wei)正常(chang)。實際(ji)阻(zu)值(zhi)若與標稱阻(zu)值(zhi)相(xiang)差過(guo)大,則說明其(qi)性能(neng)不良或(huo)已損壞。
B、加(jia)溫(wen)(wen)(wen)檢測(ce);在常溫(wen)(wen)(wen)測(ce)試正常的基礎上,即可進行第二步測(ce)試—加(jia)溫(wen)(wen)(wen)檢測(ce),將一熱源(例如電(dian)烙鐵)靠近PTC熱敏(min)電(dian)阻對(dui)其(qi)加(jia)熱,同時用(yong)萬用(yong)表監測(ce)其(qi)電(dian)阻值是(shi)否隨溫(wen)(wen)(wen)度的升高而增(zeng)大,如是(shi),說明熱敏(min)電(dian)阻正常,若阻值無變化,說明其(qi)性能(neng)變劣(lie),不能(neng)繼續使用(yong)。注意不要使熱源與PTC熱敏(min)電(dian)阻靠得(de)過近或(huo)直(zhi)接接觸(chu)熱敏(min)電(dian)阻,以防止(zhi)將其(qi)燙壞。
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