Pneumatic-Hydraulic Combination Control Pneumatic-Hydraulic Combination Control DennyFerd (Electrical) (OP) 5 Dec 15 08:38 What is Pneumatic-Hydraulic Combination Control system ? What is work principle of this system ? RE: Pneumatic-Hydraulic Combination Control PNachtwey (Electrical) 5 Dec 15 15:45 These systems are often in sawmill systems where the log must be centered on a chain but since the log is not smooth the knots and other deformities causes huge pressure spikes unless there is a small air cylinder to absorb the shock. Do a search of air over oil. You can see this technology is used for vehicle shock absorbers. Peter Nachtwey Delta Computer Systems http://www.deltamotion.com RE: Pneumatic-Hydraulic Combination Control DennyFerd (Electrical) (OP) 7 Dec 15 07:07 Can you explain it more specifically, please ? I have searched this topic for long. But there aren't many forum that discuss this topic. Where can i find references so that i can understand about this kind of system ? Thank you for your answer. Regards, Denny F. Electrical Engineering Sepuluh Nopember Institute of Technology RE: Pneumatic-Hydraulic Combination Control Compositepro (Chemical) 7 Dec 15 17:03 I am not sure that I have understood your question correctly, but air over oil systems are used in low pressure systems where the compressibility of air in the cylinders is not acceptable.