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遇到字車(che)撞墻(qiang)是指在打印過程中字車回到左邊界后仍繼續前進,撞擊左邊界,字車電機發出異常聲音。這通常是因為條碼打印機的初始位置傳感器沒檢測到字車所致,一般情況下,只需將傳感器向右邊稍作調整即可,少數情況下應檢查該檢測電路。當然,字車導軌阻力太大也同樣能造成撞墻的故障。另外,字車電機損壞或其驅動電路損壞,都可能造成上述故障,此時就需要檢查上述電路部分了。走紙機構相對打印頭和字車機構來說,負荷較小,故障率也較低,常見的有不走紙或走紙不均勻、缺紙等。
不走(zou)(zou)紙或(huo)走(zou)(zou)紙不均勻的(de)(de)(de)原(yuan)因(yin)通常是走(zou)(zou)紙電(dian)(dian)機(ji)(ji)或(huo)驅(qu)動(dong)(dong)(dong)(dong)電(dian)(dian)路損(sun)壞,傳動(dong)(dong)(dong)(dong)機(ji)(ji)械(xie)故(gu)障,驅(qu)動(dong)(dong)(dong)(dong)軟件不匹配(pei)(pei)等等。一般來講(jiang),走(zou)(zou)紙電(dian)(dian)機(ji)(ji)損(sun)壞的(de)(de)(de)情況比較多,通常是因(yin)為用(yong)戶在通電(dian)(dian)的(de)(de)(de)情況下(xia)用(yong)手(shou)(shou)(shou)轉(zhuan)(zhuan)動(dong)(dong)(dong)(dong)進(jin)紙手(shou)(shou)(shou)柄(bing),或(huo)正常打印時(shi)強行撕紙,導(dao)致走(zou)(zou)紙電(dian)(dian)機(ji)(ji)負載過重而燒壞。此(ci)時(shi)在斷電(dian)(dian)情況下(xia)手(shou)(shou)(shou)動(dong)(dong)(dong)(dong)轉(zhuan)(zhuan)動(dong)(dong)(dong)(dong)進(jin)紙手(shou)(shou)(shou)柄(bing),能明顯感覺輕微(wei)的(de)(de)(de)振動(dong)(dong)(dong)(dong)感,與電(dian)(dian)機(ji)(ji)正常時(shi)轉(zhuan)(zhuan)動(dong)(dong)(dong)(dong)的(de)(de)(de)平滑(hua)(hua)的(de)(de)(de)感覺有(you)很(hen)大不同。一般更換走(zou)(zou)紙電(dian)(dian)機(ji)(ji)就能解決(jue)問(wen)題(ti)。機(ji)(ji)械(xie)部分(fen)的(de)(de)(de)故(gu)障大多表現為傳動(dong)(dong)(dong)(dong)齒輪(lun)之(zhi)間咬合不緊密(mi),或(huo)齒輪(lun)磨損(sun)打滑(hua)(hua)導(dao)致。此(ci)時(shi)需仔細觀察(cha)傳動(dong)(dong)(dong)(dong)機(ji)(ji)構(gou),將錯位、脫(tuo)落的(de)(de)(de)齒輪(lun)重新定位或(huo)更換磨損(sun)的(de)(de)(de)齒輪(lun)即可。而條碼打印機(ji)(ji)無規則走(zou)(zou)紙的(de)(de)(de)情況大多是由于驅(qu)動(dong)(dong)(dong)(dong)軟件不匹配(pei)(pei)的(de)(de)(de)原(yuan)因(yin)。只(zhi)要作一下(xia)自(zi)檢測試和聯(lian)機(ji)DOS下的(de)直接文(wen)本(ben)打印,如能正常走紙,即(ji)可確定(ding)條碼打印機(ji)無硬件上(shang)(shang)的(de)故障,問(wen)題(ti)是(shi)出在驅動軟件上(shang)(shang)。
缺紙的表現(xian)為加電并裝好打(da)印(yin)紙后,面(mian)板(ban)仍顯(xian)示缺紙狀態,無法聯機打(da)印(yin)。這時要重點檢查紙張傳感(gan)(gan)器及其電路。紙張傳感(gan)(gan)器一(yi)般有機械開關式(shi)和(he)光電耦合式(shi)兩種。機械開關式(shi)在長時間使用后,容易(yi)發生觸(chu)點接觸(chu)不(bu)良(liang),導致檢測不(bu)到紙張,此時需要清(qing)洗(xi)或(huo)更換傳感(gan)(gan)器。對光電耦合式(shi)的,要注意(yi)是否(fou)有灰塵堵住傳感(gan)(gan)器槽孔(kong),一(yi)般清(qing)理干凈(jing)即(ji)可解決問題。