SMC气动执行元件（气缸）故障    由于气缸装配不当和期使用，气动执行元件（气缸）易发生内、外泄漏，输出力不足和动作不平稳，缓冲果不良，活塞杆和缸盖损坏等故障现象。
1： SMC气缸的活塞杆和缸盖损坏，般是因活塞杆安装偏心或缓冲机构不起作用而造成的。对此，应调整活塞杆的中心位置；更换缓冲密封圈或调节螺钉。
2：SMC气缸的缓冲果不良，所以，当气缸出现内、外泄漏时，应重调整活塞杆的中心，以保证活塞杆与缸筒的同轴度；须常检查油雾器工作是否可靠，以保证执行元件润滑良好；当密封圈和密封环出现磨损或损环时，须及时更换；若气缸内存在杂质，应及时清除；活塞杆有伤痕时，应换。
般是因缓冲密封圈磨损或调节螺钉损坏所致。此时，应更换密封圈和调节螺钉。
3：SMC气缸的输出力不足和动作不平稳，般是因活塞或活塞杆被卡住、润滑不良、供气量不足，或缸内有冷凝水和杂质等原因造成的。对此，应调整活塞杆的中心；检查油雾器的工作是否可靠；供气管路是否被堵塞。当气缸内存有冷凝水和杂质时，应及时清除。
4：SMC气缸出现内、外泄漏，般是因活塞杆安装偏心，润滑油供应不足，密封圈和密封环磨损或损坏，气缸内有杂质及活塞杆有伤痕等造成的。www.san17.com

 SMC pneumatic actuator （cylinder） failure because improper assembly and long-term use of the cylinder, pneumatic actuator （cylinder） prone to internal and external leakage, output power and action is not smooth enough, the buffer effect of non-performing, piston rod and cylinder head damage and other symptoms .
1: SMC cylinder piston rod and cylinder head damage, usually due to the eccentric rod installation does not work or caused by the buffer body. In this regard, the center of the piston rod should be adjusted; replacement or adjustment screw ring buffer.
2: SMC cylinder adverse effect of the buffer, so when the cylinder occurs, the external leakage, should be re-adjusted the center of the piston rod, piston and cylinder to ensure concentricity; work should always check the lubricator is reliable, to ensure good lubrication actuator; when seals and sealing rings ring worn or damaged, it should be replaced; if impurities exist in the cylinder, should be promptly removed; scars on the piston rod should be replaced.
Ring buffer is generally due to wear or damage caused by adjusting screws. At this point, you should replace the seals and adjustment screws.
3: SMC cylinder output force and movement is not smooth enough, is generally due to the piston or piston rod is stuck, poor lubrication, insufficient gas supply, or the tank has condensate and impurities and other causes. In this regard, the center of the piston rod should be adjusted; check the reliability of the work of the lubricator; gas supply pipe is blocked. When the cylinder of water and impurities in the memory when there is condensation, should be promptly removed.
4: SMC cylinder occurs inside and outside the leak, usually due to installation of the eccentric rod, oil supply, seals and seal rings worn or damaged, the cylinder piston rod within the impurities and bruises caused.www.san17.com