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激光加工設備的自動循環控制系統   行程(cheng)原則(ze)控制(zhi)取(qu)行程(cheng)為變化參量，行程(cheng)開(kai)關(guan)(guan)是行程(cheng)原則(ze)控制(zhi)的(de)基本電器。行程(cheng)開(kai)關(guan)(guan)裝(zhuang)在所需地點(dian)，當安裝(zhuang)在運動(dong)部件上的(de)撞(zhuang)塊碰(peng)到行程(cheng)開(kai)關(guan)(guan)時(shi)，行程(cheng)開(kai)關(guan)(guan)的(de)觸(chu)頭功(gong)作，從(cong)而實現電路(lu)的(de)切換。行程(cheng)控制(zhi)主要用于機床(chuang)進給速度的(de)自(zi)動(dong)換接、自(zi)動(dong)循環(huan)、 自(zi)動(dong)定位(wei)及運動(dong)部件的(de)限位(wei)保護等。

激光加工設備的自動循環控制系統   KMI和KM2分(fen)(fen)別是行(xing)(xing)車(che)向前和向后的(de)接觸器，在其線圈電(dian)路中分(fen)(fen)別串接行(xing)(xing)程(cheng)開(kai)(kai)(kai)關(guan)的(de)常閉(bi)觸頭。當行(xing)(xing)車(che)向前到(dao)達終(zhong)點(dian)時，安裝在終(zhong)點(dian)的(de)行(xing)(xing)程(cheng)開(kai)(kai)(kai)關(guan)SQ1的(de)常閉(bi)觸頭被行(xing)(xing)業車(che)撞塊撞開(kai)(kai)(kai)，KMI斷電(dian)，行(xing)(xing)車(che)停止，從而起到(dao)限(xian)位(wei)(wei)(wei)保護作用。一旦(dan)行(xing)(xing)車(che)離(li)開(kai)(kai)(kai)終(zhong)點(dian)位(wei)(wei)(wei)置(zhi)，行(xing)(xing)程(cheng)開(kai)(kai)(kai)關(guan)就能自動復位(wei)(wei)(wei)，行(xing)(xing)車(che)繼續(xu)正常運行(xing)(xing)。這種專為限(xian)制極限(xian)位(wei)(wei)(wei)置(zhi)的(de)行(xing)(xing)程(cheng)開(kai)(kai)(kai)關(guan)也稱(cheng)限(xian)位(wei)(wei)(wei)開(kai)(kai)(kai)關(guan)或終(zhong)端開(kai)(kai)(kai)關(guan)。

激光加工設備的自動循環控制系統  行(xing)(xing)(xing)程(cheng)(cheng)(cheng)控制中(zhong)的(de)(de)(de)(de)自(zi)動(dong)往(wang)復循環控制電(dian)(dian)路(lu)，行(xing)(xing)(xing)程(cheng)(cheng)(cheng)開(kai)(kai)關的(de)(de)(de)(de)常開(kai)(kai)觸(chu)(chu)頭(tou)和常閉(bi)(bi)觸(chu)(chu)頭(tou)共同作用。設行(xing)(xing)(xing)程(cheng)(cheng)(cheng)開(kai)(kai)關SQ1放(fang)在(zai)(zai)右端(duan)需要(yao)反(fan)向(xiang)的(de)(de)(de)(de)位置(zhi)，而SQ2放(fang)在(zai)(zai)左端(duan)需要(yao)反(fan)向(xiang)的(de)(de)(de)(de)位置(zhi)，擋鐵安裝在(zai)(zai)平移(yi)部件(jian)(jian)(jian)上。啟動(dong)時(shi)，利用正、反(fan)向(xiang)啟動(dong)按鈕，當(dang)按下(xia)(xia)正轉按鈕SB2時(shi)，接(jie)觸(chu)(chu)器KM1線(xian)(xian)(xian)(xian)圈通(tong)電(dian)(dian)并(bing)自(zi)鎖，電(dian)(dian)機正轉帶動(dong)機床(chuang)運(yun)動(dong)部件(jian)(jian)(jian)左移(yi)，當(dang)運(yun)動(dong)部件(jian)(jian)(jian)移(yi)至左端(duan)并(bing)碰到SQ:時(shi)，將行(xing)(xing)(xing)程(cheng)(cheng)(cheng)開(kai)(kai)關SQ2壓下(xia)(xia)，其常閉(bi)(bi)觸(chu)(chu)頭(tou)斷開(kai)(kai)，切斷KM1線(xian)(xian)(xian)(xian)圈電(dian)(dian)路(lu)，同時(shi)SQ1常開(kai)(kai)觸(chu)(chu)頭(tou)閉(bi)(bi)合(he)，接(jie)通(tong)KM2線(xian)(xian)(xian)(xian)圈，電(dian)(dian)機反(fan)轉，帶動(dong)運(yun)動(dong)部件(jian)(jian)(jian)右移(yi)，當(dang)移(yi)至右端(duan)并(bing)碰到行(xing)(xing)(xing)程(cheng)(cheng)(cheng)開(kai)(kai)關SQ1時(shi)，SQ1的(de)(de)(de)(de)常閉(bi)(bi)觸(chu)(chu)頭(tou)斷開(kai)(kai)，切斷KM2線(xian)(xian)(xian)(xian)圈電(dian)(dian)路(lu)，同時(shi)SQ2的(de)(de)(de)(de)常開(kai)(kai)觸(chu)(chu)頭(tou)又(you)接(jie)通(tong)KM1線(xian)(xian)(xian)(xian)圈電(dian)(dian)路(lu)，電(dian)(dian)機又(you)反(fan)轉變(bian)為正轉，如此往(wang)復循環運(yun)動(dong)。運(yun)動(dong)部件(jian)(jian)(jian)每經過一次自(zi)動(dong)往(wang) 復循環，電(dian)(dian)機就要(yao)進(jin)行(xing)(xing)(xing)兩次反(fan)接(jie)制動(dong)過程(cheng)(cheng)(cheng)，這將出現較(jiao)大的(de)(de)(de)(de)電(dian)(dian)流和機械(xie)沖擊。因此，這種線(xian)(xian)(xian)(xian)路(lu)只適用于(yu)電(dian)(dian)機容(rong)量較(jiao)小(xiao)、循環周期較(jiao)長，電(dian)(dian)機轉軸具有足夠剛性的(de)(de)(de)(de)拖動(dong)系統中(zhong)。另(ling)外，選(xuan)擇(ze)接(jie)觸(chu)(chu)器的(de)(de)(de)(de)容(rong)量也應適當(dang)加大些(xie)。