1、登車橋http://www.fnae.cn/主軸軸向竄動太大，應調整主軸上背母，減少軸向間隙，保證在0.07mm之間，主軸錐孔與鉆頭錐柄配合不好，應用鑄鐵莫氏錐棒研磨錐孔，保證與標準檢驗心棒的接觸面積不小于70%。
Ramps shaft axial movement too, should be adjusted to the spindle back mother, reducing the axial gap between guaranteed 0.07mm, the drill spindle taper taper shank with the bad, apply iron rods Morse taper grinding contact area to ensure that the standard test mandrel of not less than 70%.

2、登車橋工件裝夾過緊或夾緊部位不當，造成工件變形，應合理選擇夾緊部位，正確夾緊工件額，夾緊部位重復精度差及夾緊不牢固，應重新調整夾緊部件，保證重復定位精度和夾緊牢固。
Ramps workpiece clamping too tight or improper clamping portion, resulting in deformation of the workpiece clamping site should be a reasonable choice, the correct amount of clamp the workpiece clamping portion clamping repeatability poor and weak, readjust the clamping member, ensure repeat positioning accuracy and clamping firm.

3、登車橋http://www.fnae.cn/主軸錐孔內有毛刺或研傷，造成鉆頭傾斜，應用刮刀修刮內錐孔毛刺或研仿部位，保證錐孔軸心線的徑向圓跳動誤差靠主軸端小于0.02mm。
Ramps spindle taper hole grind burrs or injury, resulting in drill tilt, application scraper scratch repair glitches or research within the tapered bore fake site to ensure the radial runout error by the cone axis of the spindle nose less than 0.02mm.