檢(jian)查(cha)外(wai)圓磨(mo)床機床作(zuo)業(ye)臺移動在筆直(zhi)(zhi)平(ping)面內(nei)的直(zhi)(zhi)線(xian)度差(cha)錯。在作(zuo)業(ye)臺基地(di)放一個隨機床附帶的橋板，或(huo)克己的專用(yong)橋板（只用(yong)于(yu)斜臺面，平(ping)臺面不需用(yong)橋板）。在橋板基地(di)與作(zuo)業(ye)臺移動的方向平(ping)行放置一個水平(ping)儀(yi)。移動作(zuo)業(ye)臺，每隔250mm記(ji)載一次讀數(shu)（短床身在較(jiao)大磨(mo)削長度的兩頭(tou)和基地(di)三個方位檢(jian)查(cha)），將(jiang)水平(ping)儀(yi)讀數(shu)順次擺放，畫出作(zuo)業(ye)臺的運動曲(qu)線(xian)。天津市在1000mm長度上的運動曲(qu)線(xian)至兩頭(tou)點連線(xian)間的較(jiao)大坐標(biao)值，即是1000mm長度上的直(zhi)(zhi)線(xian)度差(cha)錯。

編(bian)(bian)程(cheng)(cheng)(cheng)原(yuan)(yuan)點(dian)(dian)(dian)(dian)、工(gong)(gong)(gong)件(jian)原(yuan)(yuan)點(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)概念，編(bian)(bian)程(cheng)(cheng)(cheng)坐(zuo)標(biao)系(xi)是為(wei)了編(bian)(bian)程(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)需要(yao)(yao)在(zai)(zai)零(ling)件(jian)圖(tu)紙上所建(jian)立(li)(li)(li)起來(lai)的(de)(de)(de)(de)(de)坐(zuo)標(biao)系(xi)，它(ta)的(de)(de)(de)(de)(de)坐(zuo)標(biao)原(yuan)(yuan)點(dian)(dian)(dian)(dian)稱為(wei)編(bian)(bian)程(cheng)(cheng)(cheng)原(yuan)(yuan)點(dian)(dian)(dian)(dian)，它(ta)是用來(lai)計算編(bian)(bian)程(cheng)(cheng)(cheng)尺寸基(ji)點(dian)(dian)(dian)(dian)坐(zuo)標(biao)的(de)(de)(de)(de)(de)基(ji)準點(dian)(dian)(dian)(dian)。編(bian)(bian)程(cheng)(cheng)(cheng)原(yuan)(yuan)點(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)選(xuan)擇(ze)要(yao)(yao)根據零(ling)件(jian)圖(tu)上的(de)(de)(de)(de)(de)尺寸，位(wei)(wei)置的(de)(de)(de)(de)(de)設(she)計基(ji)準來(lai)選(xuan)擇(ze)，一(yi)(yi)般(ban)盡可(ke)能要(yao)(yao)讓編(bian)(bian)程(cheng)(cheng)(cheng)原(yuan)(yuan)點(dian)(dian)(dian)(dian)與設(she)計基(ji)準重(zhong)合。工(gong)(gong)(gong)件(jian)原(yuan)(yuan)點(dian)(dian)(dian)(dian)是在(zai)(zai)零(ling)件(jian)的(de)(de)(de)(de)(de)加(jia)(jia)(jia)工(gong)(gong)(gong)過(guo)程(cheng)(cheng)(cheng)中(zhong)(zhong)，為(wei)了讓機(ji)(ji)床(chuang)(chuang)(chuang)和(he)(he)(he)工(gong)(gong)(gong)件(jian)之間建(jian)立(li)(li)(li)起正確(que)的(de)(de)(de)(de)(de)相對加(jia)(jia)(jia)工(gong)(gong)(gong)位(wei)(wei)置，從(cong)而保證加(jia)(jia)(jia)工(gong)(gong)(gong)軌跡的(de)(de)(de)(de)(de)正確(que)性，而在(zai)(zai)機(ji)(ji)床(chuang)(chuang)(chuang)的(de)(de)(de)(de)(de)加(jia)(jia)(jia)工(gong)(gong)(gong)范圍(wei)內所建(jian)立(li)(li)(li)的(de)(de)(de)(de)(de)加(jia)(jia)(jia)工(gong)(gong)(gong)坐(zuo)標(biao)系(xi)，它(ta)的(de)(de)(de)(de)(de)坐(zuo)標(biao)原(yuan)(yuan)點(dian)(dian)(dian)(dian)稱為(wei)工(gong)(gong)(gong)件(jian)原(yuan)(yuan)點(dian)(dian)(dian)(dian)。工(gong)(gong)(gong)件(jian)坐(zuo)標(biao)原(yuan)(yuan)點(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)選(xuan)擇(ze)是在(zai)(zai)機(ji)(ji)床(chuang)(chuang)(chuang)的(de)(de)(de)(de)(de)加(jia)(jia)(jia)工(gong)(gong)(gong)范圍(wei)內進行(xing)選(xuan)取，可(ke)以在(zai)(zai)工(gong)(gong)(gong)件(jian)上，夾具上或靠(kao)近工(gong)(gong)(gong)件(jian)和(he)(he)(he)夾具的(de)(de)(de)(de)(de)某一(yi)(yi)位(wei)(wei)置。數控車床(chuang)(chuang)(chuang)廠家零(ling)件(jian)被定位(wei)(wei)和(he)(he)(he)裝夾在(zai)(zai)機(ji)(ji)床(chuang)(chuang)(chuang)上之后(hou)，相應的(de)(de)(de)(de)(de)編(bian)(bian)程(cheng)(cheng)(cheng)原(yuan)(yuan)點(dian)(dian)(dian)(dian)在(zai)(zai)機(ji)(ji)床(chuang)(chuang)(chuang)坐(zuo)標(biao)系(xi)中(zhong)(zhong)的(de)(de)(de)(de)(de)位(wei)(wei)置應與工(gong)(gong)(gong)件(jian)的(de)(de)(de)(de)(de)加(jia)(jia)(jia)工(gong)(gong)(gong)原(yuan)(yuan)點(dian)(dian)(dian)(dian)重(zhong)合。因此需要(yao)(yao)通(tong)過(guo)對刀(dao)的(de)(de)(de)(de)(de)手(shou)段建(jian)立(li)(li)(li)工(gong)(gong)(gong)件(jian)坐(zuo)標(biao)系(xi)即為(wei)加(jia)(jia)(jia)工(gong)(gong)(gong)坐(zuo)標(biao)系(xi)，之后(hou)通(tong)過(guo)調用并執(zhi)行(xing)程(cheng)(cheng)(cheng)序中(zhong)(zhong)的(de)(de)(de)(de)(de)工(gong)(gong)(gong)件(jian)坐(zuo)標(biao)系(xi)建(jian)立(li)(li)(li)指(zhi)(zhi)令(ling)(ling)，比如零(ling)點(dian)(dian)(dian)(dian)偏置指(zhi)(zhi)令(ling)(ling)，建(jian)立(li)(li)(li)局部坐(zuo)標(biao)系(xi)指(zhi)(zhi)令(ling)(ling)等(deng)，從(cong)而保證零(ling)件(jian)的(de)(de)(de)(de)(de)正確(que)加(jia)(jia)(jia)工(gong)(gong)(gong)。

數控機(ji)床(chuang)檢查(cha)(cha)(cha)作(zuo)(zuo)業(ye)(ye)臺移動對水平(ping)銑頭主軸(zhou)(zhou)軸(zhou)(zhou)線的(de)(de)(de)(de)(de)(de)筆直度差(cha)(cha)錯的(de)(de)(de)(de)(de)(de)辦法。銷售檢查(cha)(cha)(cha)時，將進(jin)口(kou)水平(ping)銑頭固(gu)定(ding)(ding)在(zai)(zai)(zai)接近(jin)作(zuo)(zuo)業(ye)(ye)臺面(mian)的(de)(de)(de)(de)(de)(de)方位(wei)，夾緊主軸(zhou)(zhou)套筒，可(ke)旋轉視點的(de)(de)(de)(de)(de)(de)銑頭應(ying)調整(zheng)到零位(wei)。作(zuo)(zuo)業(ye)(ye)臺移至導軌基地，即離主軸(zhou)(zhou)軸(zhou)(zhou)線L/2的(de)(de)(de)(de)(de)(de)當地，并(bing)在(zai)(zai)(zai)作(zuo)(zuo)業(ye)(ye)臺T形(xing)槽(cao)中放(fang)一(yi)專用滑(hua)塊(kuai)，使(shi)滑(hua)塊(kuai)凸緣緊靠(kao)在(zai)(zai)(zai)基地T形(xing)槽(cao)的(de)(de)(de)(de)(de)(de)旁(pang)邊面(mian)上。在(zai)(zai)(zai)主軸(zhou)(zhou)上固(gu)定(ding)(ding)一(yi)個角形(xing)表(biao)桿，使(shi)千(qian)分表(biao)測頭頂在(zai)(zai)(zai)滑(hua)塊(kuai)的(de)(de)(de)(de)(de)(de)旁(pang)邊面(mian)上，記下(xia)表(biao)的(de)(de)(de)(de)(de)(de)讀數。滑(hua)塊(kuai)不(bu)動，移動作(zuo)(zuo)業(ye)(ye)臺L長(chang)度后(hou)（L的(de)(de)(de)(de)(de)(de)長(chang)度按機(ji)床(chuang)不(bu)一(yi)樣(yang)規格(ge)，由沈陽(yang)機(ji)床(chuang)精度查(cha)(cha)(cha)驗規范(fan)斷定(ding)(ding)），放(fang)置主軸(zhou)(zhou)180°使(shi)千(qian)分表(biao)觸頭再次觸及(ji)滑(hua)塊(kuai)的(de)(de)(de)(de)(de)(de)旁(pang)邊面(mian)上查(cha)(cha)(cha)驗。千(qian)分表(biao)兩次讀數的(de)(de)(de)(de)(de)(de)較大差(cha)(cha)值即是(shi)筆直度差(cha)(cha)錯。

通常數(shu)(shu)控機床反轉(zhuan)作業(ye)(ye)臺是(shi)銑(xian)床的(de)(de)(de)附件(jian)，分(fen)(fen)(fen)度精度較低，故可選用八方檢(jian)(jian)具(ju)進(jin)行(xing)檢(jian)(jian)查(cha)(cha)。八方檢(jian)(jian)具(ju)的(de)(de)(de)外(wai)接(jie)圓直徑為(wei)250mm。在(zai)(zai)作業(ye)(ye)臺錐孔中嚴密刺(ci)進(jin)八方檢(jian)(jian)具(ju)的(de)(de)(de)定位心(xin)軸，以確保作業(ye)(ye)臺反轉(zhuan)基地與八方檢(jian)(jian)具(ju)外(wai)接(jie)圓基地重合。將(jiang)被檢(jian)(jian)作業(ye)(ye)臺固(gu)定于查(cha)(cha)驗平板上，將(jiang)千(qian)(qian)分(fen)(fen)(fen)表(biao)底座(zuo)上的(de)(de)(de)凸緣(yuan)靠緊在(zai)(zai)查(cha)(cha)驗平板上導(dao)向槽(cao)的(de)(de)(de)旁邊(bian)(bian)面沒有(you)導(dao)向槽(cao)的(de)(de)(de)可用平尺替代)，使千(qian)(qian)分(fen)(fen)(fen)表(biao)測(ce)頭頂在(zai)(zai)八方檢(jian)(jian)具(ju)的(de)(de)(de)一(yi)(yi)邊(bian)(bian)上，沿(yan)導(dao)向槽(cao)移動千(qian)(qian)分(fen)(fen)(fen)表(biao)座(zuo)，使千(qian)(qian)分(fen)(fen)(fen)表(biao)在(zai)(zai)兩(liang)處的(de)(de)(de)讀(du)數(shu)(shu)一(yi)(yi)樣（靠滾(gun)動蝸桿手柄來調整）。然后廠(chang)家將(jiang)作業(ye)(ye)臺轉(zhuan)過45°（即(ji)360°/8），千(qian)(qian)分(fen)(fen)(fen)表(biao)在(zai)(zai)另一(yi)(yi)邊(bian)(bian)的(de)(de)(de)悉數(shu)(shu)長度上檢(jian)(jian)查(cha)(cha)，順次檢(jian)(jian)查(cha)(cha)各邊(bian)(bian)。千(qian)(qian)分(fen)(fen)(fen)表(biao)在(zai)(zai)恣(zi)意一(yi)(yi)邊(bian)(bian)兩(liang)頭讀(du)數(shu)(shu)的(de)(de)(de)較大差值(zhi)即(ji)是(shi)分(fen)(fen)(fen)度差錯。