Low Frequency Pneumatic Isolation Solutions from China Suppliers and Factory for Enhanced Precision and Stability
Precision-Aire™ Leveling Isolators (PAL)
PAL-type pneumatic isolators provide superior low frequency isolation for metrology instruments, electron microscopes, MRI units, coordinate measuring machines and precision manufacturing equipment.
PAL isolators react quickly to changes in the supported load and to center of gravity shifts by automatically releveling to a preset position.
A pneumatic isolation system’s performance is a compromise between natural frequency (isolation), valve leveling accuracy and settling time.
Settling time can be defined as the time it takes for an isolation system’s motion to return to a predetermined reference with respect to a defined input disturbance. The disturbance can be an environmental input or machine induced, such as a gantry or stage movement.
Settling time is minimal with optimum damping and corresponding valve flow. Long settling times using pneumatic isolators are unacceptable because precision measuring and positioning machines can suffer repeatability errors and throughput losses.
Custom/OEM Isolators
High-end three-dimensional flexible robotic cutting applications, to achieve bevel cutting function, the pipe and the torch using the servo positioning function.
Isolators for OEM applications or having custom requirements are available for easy integration into machine designs. For cleanroom applications, the exhaust air from the leveling valves is vented and the isolators are made using cleanroom compatible materials, cleaned and packaged. Isolators can also be made using nonmagnetic materials.
Leveling Valves
A wide range of leveling valves are available. Leveling valves have accuracies from +/- 0.006” (0.15 mm) to +/- 0.001” (0.025 mm)* with adjustable flow rates to accommodate application requirements. Valve stiffness, flow rate and accuracy are important variables to optimum isolator settling time and isolation efficiency.
Precision-Aire™ Pneumatic Leveling Mounts (PLM)
PLM mounts provide low frequency vibration and shock control for surface plates, coordinate measuring machines, fans, air compressors, motor/generator sets, high-speed punch presses and more.
The Fabreeka PLM series pneumatic isolation mounts are low frequency vibration and shock isolators that provide both attenuation of disturbing vibration and equipment leveling.
For vibration control applications, the pneumatic (pressurized) portion of these mounts provides significant reduction of vibration amplitudes occurring at frequencies above 5 Hz, having a natural frequency as low as 3 Hz.
PLM isolation mounts will also continue to isolate with no pressure having a vertical natural frequency of approximately 10 Hz, isolating frequencies above 14 Hz.
The vertical to horizontal natural frequency ratio is approximately 1:1 with a high degree of horizontal stability.
For shock or impact applications, the outer elastomeric wall construction provides a high deflection shock mount. A low natural frequency (3 Hz) can be maintained by utilizing an external spacer to prevent a “bottom out” condition.
What instruments are PAL-type pneumatic isolators designed for?
PAL-type pneumatic isolators are designed for metrology instruments, electron microscopes, MRI units, coordinate measuring machines, and precision manufacturing equipment requiring superior low-frequency isolation.
How does settling time affect precision measuring and positioning machines?
Long settling times can lead to repeatability errors and throughput losses. Optimum damping and proper valve flow are required to minimize settling time and maintain machine efficiency.
Are custom/OEM isolators compatible with cleanroom environments?
Yes. For cleanroom applications, the leveling valves exhaust air is vented, and the systems are constructed using cleanroom-compatible and nonmagnetic materials, which are fully cleaned and packaged.
What is the accuracy range of your leveling valves?
Leveling valves offer high-precision accuracies ranging from +/- 0.006” (0.15 mm) to +/- 0.001” (0.025 mm) with adjustable flow rates to match specific application demands.
How do PLM mounts perform when there is no air pressure?
PLM isolation mounts continue to isolate even without pressure. In an unpressurized state, they maintain a vertical natural frequency of approximately 10 Hz, isolating frequencies above 14 Hz.
How is "bottom out" prevented in shock or impact applications?
For heavy shock or impact applications, a low natural frequency of 3 Hz can be safely maintained by utilizing an external spacer to prevent a bottom-out condition.