The reformation of the horizontal mechanism: we make the horizontal ball lead screw instead of the conventional screw. And Stepper motor drives the screw.
横向进给机构的改造：拆除横向丝杠换上滚珠丝杠，由步进电机带动。
To increasing the automation degree of rut tests and controlling the small car route conveniently, a stepper motor replaces the traditional crank connecting rod organization for small car drives;
为了提高车辙测试的自动化程度，在进行车辙试验时方便地控制测试小车的行程，用步进电机驱动小车代替传统的曲柄连杆机构驱动；
To increasing the automation degree of rut tests and controlling the small car route conveniently, a stepper motor replaces the traditional crank connecting rod organization for small car drives;
为了提高车辙测试的自动化程度，在进行车辙试验时方便地控制测试小车的行程，用步进电机驱动小车代替传统的曲柄连杆机构驱动；
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