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ÊNASA
Goddard's Advanced Interferometer and Metrology
Lab (AIM) Ê |
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To meet AIM's stringent requirements for position, seismic, and thermal stability, a custom version of TMC's 794 Series ClassOneª CleanTop¨ II Optical Top coupled with a six-mount STACIS¬ 2100 active piezoelectric vibration cancellation system will be used to support the interferometer, ensuring the most stable environment possible. Because even minute distortions of the optical top due to temperature gradients will adversely affect the performance of an interferometer, the Class 100 cleanroom-compatible, 5-foot wide by 16-foot long by 2-foot thick CleanTop II Optical Top incorporates top and bottom face sheets made from Invar, an alloy of stainless steel with a coefficient of thermal expansion approaching zero. NASA required a total to two of these CleanTop and Stacis vibration isolation table systems. Stacis 2100 was chosen to support the tops because
it provides the lowest possible vibration environment
in both frequency and amplitude. Employing
advanced inertial vibration sensors and state-of-the-art
piezoelectric actuators, Stacis cancels vibration
in real time by sensing floor vibration, then
expands and contracts the piezoelectric actuators to filter out
floor motion. Isolation starts at 0.6 Hz and the active bandwidth
is 250 Hz. |
This
approach provides attenuation an order of magnitude
lower in frequency than passive systems and
enables 90% vibration isolation at 2 Hz, a frequency at which other
systems actually amplify vibration.
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ÊDemand
For TMC's Ultra-Quiet Surfaces
Leads to Ê4th Building Expanion Since 1990 |
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TMC has solidified its reputation and its position as the industry leader through constant innovation, new product introductions and high-quality products with state-of-the-art performance. This, in combination with a relentless demand for precision floor vibration isolation systems, has fueled TMC's fourth building expansion in the last 15 years. The additional 9,000 square feet of manufacturing space will include large cleanroom assembly areas to assemble, clean and package systems bound for semiconductor fabs and equipment makers, pharmaceuticals, medical research labs, and advanced photonics facilities. |
TMC purchased the present site in Peabody, MA and constructed the original 35,000-square-foot building in 1984. The current expansion brings the building to 80,000 square feet on the 11-acre site. Dedicated to manufacturing TMC's precision vibration isolation systems, the facility was specifically designed and built to include many custom features which enable the efficient manufacturing, handling, assembly, testing, and packaging of TMC's growing product line. |
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TMC's 9,000 square-foot addition will be completed in early 2007. |
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Navigating our 275-page web site just got easier. |
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TMC has redesigned and relaunched its web site. We've gathered a wealth of information and made it easier than ever to find what you need. By incorporating multiple cross-reference tools including a Products-At-A-Glance chart, an alphabetical index, an industry index, and a site search engine, we can ensure that you'll find the product or information you require.
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Among the highlights you'll find:
If you can't find what you're looking for among our standard products, it probably doesn't exist. But since most of TMC's sales are custom-made products for OEM and end users, we would be happy to discuss your vibration isolation problem and design and manufacture a solution.
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