目前少数工厂流水线箱外自动打砂房即便在无箱通过时，抛头电机多以工频空载运转。
Currently most factory outside play sand automatic water kit is included as standard room even in no case through, head to work more than throw motor frequency no-load running.
顶升作业时液压系统应进行空载运转，调整顶升套架滚轮与塔身标准节的间隙，使起重力矩与平衡力矩保持平衡；
Lifting operation hydraulic system should be no-load operation, adjust the lifting sleeve frame roller and the mast section clearance, hoisting torque and balance torque balance;
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