STACIS
2100 Piezoelectric Isolation System - Installation & Operation Manual
P/N 96-28765-01
Page 11 of 43
2)
STACIS should only be installed on floors having a minimum stiffness (in all axes) as specified
here. Risers and stands can be used under STACIS isolators, providing the stand-to-isolator
interface also meets the same stiffness requirement.
Isolator Load
Minimum Interface Stiffness
Low load (-01)
250,000 lbs/in. (44 x 10
6
N/m)
Medium load (-02)
350,000 lbs/in (62 x 10
6
N/m)
High load (-03)
450,000 lbs/in (80 x 10
6
N/m)
3)
STACIS has a maximum displacement of 480 µ” (12 µm) peak-peak or
±
240 µ” (6 µm) at
frequencies below 10 Hz. At frequencies above 10 Hz, the maximum displacement decreases
as the frequency increases.
4)
The maximum peak-peak broadband displacement of the floor in each axis under all conditions
(vibration plus displacements due to walking, etc.) must be less than 480 µ” (12 µm). If the floor
exceeds 480 µ” (12 µm) of displacement, one or more channels of the STACIS isolators may
overload and isolation may be briefly lost. If it is known, or suspected, that the floor exceeds
the maximum displacement, consult with TMC.
3.4 Installation Spacer
If steel plates as noted above will be used, fabricate a temporary wooden spacer for each Isolator with
dimensions of 150x150x290mm (4”x4”x 12.25”). If base plates will not be used, or if risers will be used to
increase the operating height of STACIS, calculate the correct height for the spacer blocks. These blocks
will support the payload (or platform) and provide a 0.25” clearance above the isolators to avoid shocking
the isolator and to also while minimize excessive wedge loading; both of which can lead to overloading
and damage of the isolator (see installation steps in section 3.8).
Mechanical jacks with an adequate load capacity can be used in place of the spacers, providing the jacks
do not leak or drift downward under load. Professional rigging is required in most cases.
Steel plates grouted to the floor to
form a level and coplanar mounting
surface for the isolators
Grout or epoxy, typical ½” thick
Uneven/sloping floor
Payload interface plate
Four spacers need to be used to support
the platform during installation. These can
be wood or hydraulic jacks
Figure 4: Installation of STACIS
on Uneven or Sloping Floor.
A maximum floor displacement of 400 µ” (10 µm) is recommended to provide a
safety factor due to the fact that walking frequently produces non symmetrical
displacements which can exceed the displacement in only the + or - direction
even though the peak to peak displacement may be within the limit.
