在C6143型普通车床主传动系统中，由于传动比设计不够合理，致使主轴转速级数分布不均；
Due to the unreasonable design of the transmitting ratio in the major transmission system of lathe C6143, the progression of the spindle speed is asymmetrically distributed.
本文采用优化方法对数控车床主传动系统进行优化设计。
In the paper an optimum design method is used to design the main driving system of a CNC lathe, and a satisfactory result is obtained.
采用传递矩阵建模方法对C5235A型立式车床主传动系统进行了动态分析，找出了设计的薄弱环节，并提出了改进措施．。
The dynamic behaviour of C5235A spindle gearing is analyzed by using transfer matrix model. Some design weaknesses of spindle gearing are revealed and suggestions are made for improvement.
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