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　　数控外圆磨床头架的使用与调整头架由头架箱和头架底板组成，头架箱可绕头架底板上的轴回转，回转的角度可从刻度牌上读出。头架拨盘通过皮带轮与变频器可实现分段无及调速。头架电动机一端的三角胶带的预紧力，由移动头架电动机来调节。头架拨盘上的多楔带的预紧力由转动偏心套来调节。数控外圆磨床转动偏心套时要先松开螺钉，偏心套转到恰当位置后，再把紧定螺钉扳紧。