升降机的两个油缸间距为2.5m,提升高度为1.2m,车前部比车后部重300kg,两个活塞在偏载条件下要求上升和下降必须同步平衡运行。
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为了控制和弥补位置误差,在两个油缸下限位置分别设置了一个行程限位开关,使两个活塞在完成一个行程后,能自动调整一次位罝误差,保证每次重新启动时都是从零位开始,因而满足了位置精度条件。
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