力士乐\导轨和阀块\MLS070S-3A-0600-NNNN
二、故障分析
1、阀门反应速度太慢，动态失效，原因可能是阀太脏，节流孔被堵住，不过较好不要自己拆，应该找厂家配合清洗伺服阀。
2、油路通，却无法静载启动即系统无法平衡可能是密封件失效，更换密封件即可。
3、测试时油缸出现抖动，经过调试程序时发现放大器的增益太高，适当减小放大器的增益不会对系统有影响，不过也不能太低，否则系统可能会不稳定。高频响比例控制阀的调节主要是靠放大器的调节。
4、在调试过程中，遇到油缸速度低并且有时不能驱动的现象时，排除液压系统的故障后，经查找发现是由于伺服放大器的供电线路过长、且供电线路线径过小，使得阀门在工作时供电电流增加引起线路压降增大，从而使得到放大器的驱动电压低于系统要求的规定值使阀门无法被驱动。后更换了放大器的供电电缆（由4×0.75mm2更换为4×2.5mm2的控制电缆）后问题得以解决.
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