美国Amtrak公司Beach Grove工厂于1989年11月开始使用自动装置搬运车轮。这种价值33.3万美元的装置可代替桥式吊车运送车轮,从进入运送机上搬起车轮放到铣床位置。根据特定程序,车轮加工一面后,可把车轮翻过来加工另一面,然后放到发出运送机上送出。该装置还能代替叉车搬运车轮。可在11×7.5m的作业区把车轮送到任一地方,可把车轮从地面提到离地152～1500mm的高度。X、Y和Z轴的运动由DC闭环伺服电机驱动齿轮齿条传动装置来控 The Beach Grove facility at Amtrak in the U.S. started moving the wheels with robots in November 1989. This $ 333,000 unit can replace the overhead traveling crane to lift the wheel from the incoming conveyor to the milling machine. Depending on the specific procedure, the wheel can be turned over to machine the other side after it has been machined, and then placed on the sending conveyor. The unit can also replace the forklift truck wheel. In the 11 × 7.5m operating area to the wheel to anywhere, the wheels can be raised from the ground 152 ~ 1500mm height. Motion of the X, Y and Z axes is controlled by a DC closed-loop servo motor drive rack and pinion