The Effect of Tubing Compliance on Cylinder Positioning Stiffness
Tubing compliance refers to the elastic expansion and contraction of pneumatic hoses and tubes under pressure changes, which directly reduces the positioning stiffness of pneumatic cylinders. A typical 10-meter run of 8mm polyurethane tubing can reduce system stiffness by 40-60%, causing position deviations of 2-5mm under varying loads. This compliance effect becomes the dominant factor limiting positioning accuracy in pneumatic systems with long tube runs or high-volume tubing.