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Floor platform supported by STACIS® 2100
Active Piezoelectric Vibration Cancellation
System
click
here for a larger view
 TMC’s
low-profile 65-Series Floor Platform
Isolation Systems are designed for
larger, floor-mounted instruments. These platforms effectively
isolate instruments weighing a few hundred to tens of thousands
of pounds and do so without the compromises in stability normally
encountered when isolating instruments with a high center- of-
mass.
Historically, we approached the problem of a tall,
top-heavy payload by combining our Gimbal
Piston™ Air Isolators with
“ lifthoods” and a massive floor platform. This lowered
the effective system center-of-mass and achieved
the required stability.
Increasingly, our floor platforms are configured
with our Stacis® Active
Piezoelectric Isolators in place of our
Gimbal Piston Isolators. The advantages of Stacis over pneumatic
isolation include:
- Stacis piezoelectric isolators suffer no ill-effects
from tall, top-heavy payloads. There is no danger of gravitational
instability.
- Instruments mounted on floor platforms (typically
electron microscopes) are among the most vibration-sensitive tools
made. Stacis provides the best vibration isolation commercially
available with no low-frequency amplification .
- Instruments requiring isolation typically
incorporate an internal, built-invibration isolation system. This
system is generally a low-frequency air isolator which, in general,
should not be supported by another low-frequency air isolation
system. Stacis is compatible with being “stacked” beneath
any tool’s internal isolation system.
The 65 Series Floor Platform with
Gimbal Pistonª Isolators
Click here for a larger image
The Gimbal Piston Floor Platform is still available
and recommended in many applications. We will help you determine
whether a Stacis or Gimbal Piston Floor Platform is best for you.
TMC works closely with instrument
manufacturers to ensure that our platform design meets the instrument’s
footprint, structural, and utility requirements.
We have successfully isolated hundreds of different instruments
and are often already familiar with the tool requirements. In
most instances, you need only provide the tool manufacturer
and model for us to recommend a solution.
How to Order
Because of the complexity, sensitivity, and
value of the equipment installed on our platform isolators, we
can offer a custom engineered platform specific to the tool being
supported. Because we have previously completed the engineering
work for virtually all the well-known instruments, we can usually
supply cost and delivery information very quickly. Here is the
recommended procedure for ordering:
- Tell us what equipment or instrument
you want to isolate. Because of the frequent changes in some
types of equipment, we want to confirm the model and configuration
you have before we assign a platform model number.
- Confirm the type of floor you have – conventional
tiled lab floor, wooden beam and planks, etc. This will direct
us toward the usual solution for your conditions, which can be
adapted to suit special situations.
- Tell us if the manufacturer of the instrument
has made a pre-installation site survey of the vibration level.
In most cases, we can immediately recommend a
time-proven floor platform for your equipment. Occasionally we may
recommend that we take our own vibration measurements on site, or
look at the special conditions involved. Most smaller to intermediately
sized SEM columns may be supported by our standard 38" x 40" platform.
This platform is provided with extra holes allowing reposition of
the lifthoods to ensure adequate clearance or the addition of an
optional fourth leg.
Contact
TMC for more information.
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| General
Specifications |
| Performance
Specifications |
| Active
degrees-of-freedom: 6 |
| Active
bandwidth: 0.6 to 250 Hz |
| Passive
elastomer: 18 Hz |
| Effective
acitve resonant frequency: 0.5 Hz |
| Transmissibility
at resonance: |
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< 1.1 |
| Isolation
above 2.0 Hz: > 90% |
Setting
time after a 10 lb. (4.5 kg) step
input (10:1 reduction):
400 - 4500 lb. (182 - 2045 kg) |
Isolator
overload safety
factor: > 2:1 |
| Number
of isolators: 3 or 4 |
Maximum
displacment:
590 µ inches
(15 µm) |
| Stiffness
(1000 lbs./454 kg mass) (typical middle capacity isolator): |
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40,000 lbs./in
(73 x 103 N/m) |
| Magnetic
field emitted: < 0.02 micro-gauss broadband RMS |
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-Go
to the Stacis® Page
for more infromation
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