如果(guo)主(zhu)軸(zhou)轉速(su)(su)不(bu)(bu)正常，即主(zhu)軸(zhou)給(gei)定(ding)指(zhi)令速(su)(su)度(du)(du)(du)后(hou)，數控(kong)(kong)加(jia)工(gong)(gong)中(zhong)(zhong)(zhong)心上的反應速(su)(su)度(du)(du)(du)與指(zhi)令速(su)(su)度(du)(du)(du)不(bu)(bu)一致（一般小(xiao)于(yu)指(zhi)令速(su)(su)度(du)(du)(du)）。可能(neng)是數控(kong)(kong)加(jia)工(gong)(gong)中(zhong)(zhong)(zhong)心主(zhu)軸(zhou)不(bu)(bu)順暢而(er)且存(cun)在異常。聲音(yin)響(xiang)亮(liang)而(er)緩慢，在某些情況(kuang)下，電機甚(shen)至可能(neng)會出現過電流警報(bao)。對于(yu)數控(kong)(kong)加(jia)工(gong)(gong)中(zhong)(zhong)(zhong)心主(zhu)軸(zhou)，在編碼器(qi)(qi)響(xiang)應的情況(kuang)下，數控(kong)(kong)加(jia)工(gong)(gong)中(zhong)(zhong)(zhong)心機器(qi)(qi)給(gei)出的速(su)(su)度(du)(du)(du)指(zhi)令“S”后(hou)跟一個數字，該數字將反映(ying)系統閃光(guang)燈上的相同值。

數(shu)(shu)控(kong)加(jia)工(gong)中(zhong)(zhong)(zhong)心(xin)主軸(zhou)的(de)(de)主驅(qu)(qu)動(dong)(dong)(dong)器(qi)可(ke)與皮(pi)帶傳動(dong)(dong)(dong)裝置或(huo)齒(chi)輪(lun)傳動(dong)(dong)(dong)裝置一(yi)起(qi)使用。它們中(zhong)(zhong)(zhong)的(de)(de)大多數(shu)(shu)現在由(you)皮(pi)帶傳動(dong)(dong)(dong)中(zhong)(zhong)(zhong)的(de)(de)同步(bu)皮(pi)帶驅(qu)(qu)動(dong)(dong)(dong)。速度(du)不正常。可(ke)能是因為同步(bu)設備太長，所(suo)以它有一(yi)個滑動(dong)(dong)(dong)丟失的(de)(de)步(bu)驟。數(shu)(shu)控(kong)加(jia)工(gong)中(zhong)(zhong)(zhong)心(xin)主軸(zhou)和主軸(zhou)編碼器(qi)之間(jian)的(de)(de)耦合也(ye)與同步(bu)帶一(yi)起(qi)使用，并(bing)且(qie)在該步(bu)驟中(zhong)(zhong)(zhong)可(ke)能會(hui)丟失相同的(de)(de)情(qing)況。然而，數(shu)(shu)控(kong)加(jia)工(gong)中(zhong)(zhong)(zhong)心(xin)主軸(zhou)的(de)(de)平(ping)滑度(du)不好，或(huo)者主軸(zhou)上的(de)(de)任何軸(zhou)承都可(ke)能燒壞，導致(zhi)數(shu)(shu)控(kong)加(jia)工(gong)中(zhong)(zhong)(zhong)心(xin)的(de)(de)過(guo)大阻(zu)力并(bing)導致(zhi)主軸(zhou)滾動(dong)(dong)(dong)失敗(bai)。

外部信號干擾也構成了(le)這種現象。