timing gear backlash check

In this paper,the influence of the gear gap has been discussed.

针对齿轮转动中侧隙对系统带来的误差进行分析,指出齿轮侧隙对系统误差为零误差或一次误差,即齿轮侧隙误差没有累积效应,进而提出一种消除误差的方法。