TMC high load optical experimental table

For TMC high load optical laboratory tables that require isolation of net loads exceeding 350 pounds (160 kilograms), we recommend using our high load-bearing CleanBench 68-500 series workbench. They are similar in design to our 63-500 series workbench, with higher load-bearing isolators and larger stainless steel top plates.

TMChigh loadPractical Opticsverifytable68-9012S

For those who need to be isolated beyondFor workbench applications with a net load of 350 pounds (160 kilograms), we recommend using our high-capacity CleanBench 68-500 series workbench. They are similar in design to our 63-500 series workbench, with higher load-bearing isolators and larger stainless steel top plates.

TMChigh loadPractical Opticsverifytable68-9012S

Except for high load applications, high load-bearing capacityCleanBench can also be used for payloads with abnormally high center of gravity and devices with mobile platforms. These applications benefit from higher stability.

High load-bearing capacityCleanBench has a stiffer and larger top plate, lower natural frequency isolators, and stiffer and heavier leg supports, making its performance significantly better than any other passive workbench in the industry.

Gimbal Piston isolator

allCleanBench workbenches are equipped with TMC's Gimbal Piston air isolators as standard. In parallel testing, the performance of Gimbal Pistons has consistently outperformed other air isolators. It has excellent low-frequency isolation performance on all axes, and can maintain its performance specifications even at extremely low input excitation levels. The proprietary vibration reduction technology enables Gimbal Piston to stabilize heavy and light payloads, and quickly eliminate interference from the isolation table.

advantage

● FromVertical and horizontal isolation starting from 2 Hz

● InVibration reduced by over 95% at 10 Hz

Almost frictionless, avoiding the transition from rolling friction to static friction

Adjust horizontal displacement by acting as a universal joint

Even at low input levels,Gimbal Piston ® Air isolators can also provide excellent isolation performance in all directions. It has a slight damping characteristic and is suitable for typical low amplitudeEnvironmental ground vibration has high responsiveness, and for severe transient disturbances such as sudden load changes or roof impacts, it can achieve very good vibration reduction effects. The results indicate that the Gimbal Piston isolator can provide*The greater the isolation effect, the more it can eliminate any serious interference in just a few seconds. It can also stabilize an isolation system with a relatively high center of gravity without affecting the isolation effect.

Low amplitude input response

The biggest challenge encountered in designing effective isolators is to maintain good performance under typical low vibration amplitude inputs of surrounding building ground vibrations. The specification of the isolator is usually based on measurements taken by placing the isolator on a "vibration table" with a very high amplitude input level. This type of test with an input amplitude of approximately millimeters can lead to unrealistic performance estimates and has limitationsMisleading, as the results do not reflect the performance in actual use.

Design of Gimbal Piston isolator*The unique feature is that it can maintain its designated resonance frequency and high level of attenuation even in the quietest and most realistic ground environment. This performance is linearly related to such low amplitudes because the design has almost no friction, thus avoiding the transition from rolling friction to static friction.

All other systems we tested at typical ground vibration levels either had higher resonance frequencies than claimed or had significantly increased transmission through isolator brackets.

We emphasize the importance of performance specifications at low input levels, as we have repeatedly observed in our own testing and many used devices that better performance is easier to achieve at larger amplitudes and higher frequencies.

Horizontal and vertical inputs

Our innovative isolator can act as a universal joint, allowing the thin-walled rolling sealing membrane to adapt to horizontal displacement.The Gimbal Piston isolator does not use a cable type pendulum suspension, but instead places the load on a separate top plate with a rigid rod that extends downward into the main piston shaft. The bottom of the pole has a spherical end supported on a hard, flat base. Due to the very slight shaking of the ball on the base (without sliding or rolling), the inherent flexible coupling can bend horizontally in the isolator. Even if the input displacement is below the micro inch level, this method is very effective because static friction is almost the same as rolling friction. Horizontal motion is simply converted into the usual vertical bending of the diaphragm, but with different phases: one side of the piston is upward, the other is upwardLateral downward, moving in a universal joint style.

Limitations of other types of isolators

Thick walled rubber membrane.Most commercial isolators use inexpensive thick walled rubber diaphragms in the piston to achieve vertical isolation. Due to the relative inflexibility of these components, the low amplitude vibration isolation performance is not ideal. Although this system feels relatively "soft" by hand, for typical low-level ground vibrations, rubber acts more like a rigid coupling rather than a flexible isolator.

Sealed pneumatic isolator (passive).The sealed air isolator will not automatically adjust according to load changes. The main limitation of this system is that they are too hard to effectively isolate vibrations.For example, a realA passive isolator with a resonant frequency of 1.5 Hz will drift vertically by several inches when there are small changes in load, temperature, or pressure, and requires continuous manual adjustment. Therefore, the actual sealed isolator does not have the low resonance frequency of this design.

Bearing skateboard.In theory, the bearing slider can achieve horizontal vibration isolation through its decoupling effect. In fact, to make this design work at low amplitudes, hardened bearings with small tolerances and precision grinding are required. The existing commercial version cannot overcome the static friction force at low amplitudes to make the bearing roll. In addition, all of these systems are initially difficult to align and can easily deviate from the calibration range.

Self made assembly. Self made vibration isolation systems - typically steel or granite plates placed on rubber pads, tennis balls, or airbags - can only work when interference vibration frequencies are high and minimal isolation is required. Although all isolators use the principle of placing mass on damping springs, their performance is mainly distinguished by spring stiffness: the harder the spring, the higher the resonance frequency. Therefore, homemade solutions are limited by their high resonance frequency.

haveGimbal Piston with a vertical resonance frequency of 1.5 Hz ™ The isolator starts isolating at 2 Hz and can reduce vibration by over 95% at 10 Hz. The tennis ball under the steel plate with a resonance frequency of 7 Hz begins to isolate vibration above 10 Hz and reduces vibration by 90% at 30 Hz. However, most building floors exhibit the highest vibration displacement between 5 and 30 Hz, so amplifying the environmental frequency between 5 and 10 Hz with a tennis ball or rubber pad actually exacerbates the problem.

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