In precision motion systems, the exceptional performance of an air bearing depends on maintaining a precisely controlled air gap. This microscopic distance between the bearing surfaces directly influences stiffness, load capacity, stability and positioning accuracy. Traditionally, measuring this fly height required external measuring systems. The IBS Smart air bearings integrate an ultra-precision capacitive displacement sensing technique directly into the air bearings, enabling fly-height measurement exactly where it matters.
The Smart air bearings measure the fly height directly at the functional interface between the bearing surface and the guidance surface. The integrated ultra-precision capacitive sensing technique provides non-contact displacement measurement with resolutions in the tens of nanometres, allowing direct observation of the actual operating air gap. Measuring at the point where the air film is generated eliminates errors introduced by external sensor mounting, structural compliance and alignment offsets.
This integrated sensing technique allows users to:Because the measurement is taken exactly where the bearing performs its function, users obtain a more accurate representation of the true operating conditions.
By integrating the measurement function into the air bearings, there is no need for separate displacement sensors, mounting brackets or rigs or additional calibration procedures. This simplifies machine integration while reducing mechanical complexity.
At the same time, continuous fly-height monitoring provides valuable insight into the behaviour of the air film. Engineers can observe changes caused by acceleration, varying loads or environmental influences, helping them better understand and optimise machine performance.
The Smart air bearings combines frictionless air bearing technology with integrated fly-height measurement in a compact solution. Real-time air-gap information also enables active air-gap control, allowing systems to maintain tighter tolerances and optimise positioning performance.
By integrating an ultra-precision capacitive sensing technique directly into the bearing, the IBS Smart air bearings transforms a passive machine element into an intelligent component for next-generation precision motion systems.
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