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A problem with pneumatic positioning systems is the low energetic efficiency. This paper presents a structure of a compressed air saving for pneumatic positioning systems with capacity to move high loads. This structure use the loading to save compressed air and thus to increase the energetic efficiency of these systems. This configuration adds a fast switching on/off valve in a feedback between the cylinder chambers. This type of valves is low cost, compared with a proportional valve, but the system can achieve the same performance. Experimental results show that with this type of configuration up to 58 % of compressed air saving can be achieved in comparison to classical pneumatic positioning system.

A Scheme for Compressed Air Saving in Pneumatic Positioning Systems for High Loads