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在車床横刀架絲槓的游動分度盤(也称千分箍)上的刻度,一般絲槓每轉一格,横刀架向前進刀(或向後退刀)的數量較大。若在加工精密的工件時,欲使横刀架向前作極微量的進刀是不容易控制的。但祇要將車床横刀架的分度盤部份略加改装後,就能滿足这个要求,其所能控制的微量可由0.001吋(0.0254公厘)減小至0.0001吋(0.00254公厘)。如[圖一]和[圓二]所示,把原有游動分度盤的
In the lathe horizontal turret screw movement indexing plate (also known as micrometer hoop) on the scale, the general screw per rotation, transverse knife to move forward (or backward retractable knife) a large number. If the precision machining of the workpiece, the horizontal knife to make a very small amount of forward is not easy to control. However, this requirement can be met only by slightly modifying the indexing plate of the lathe cross-cutter, and the amount of trace that can be controlled can be reduced from 0.001 inch (0.0254 mm) to 0.0001 inch (0.00254 mm). As shown in [Figure 1] and [yen 2], the original swimming index plate