The device which has a linear encored is used to evaluate the axis position accuracy, the results show that after compensation the accuracy of the CNC machine tools has been enhanced greatly.

• 对补偿前后的螺距误差进行了精度评价,结果表明,经过螺距误差的补偿,数控机床位置误差降低,实现了机床精度的软升级。