User Guide

8 HA0206T Rev F Sep 2022
Chapter 3
3.4 System Stability
The location and height of a load placed on a table top can dramatically affect the stability of the table system. To ensure
optimum effectiveness of the isolators, it is important to avoid any instability due to the system centre of mass being misplaced.
In order to avoid dynamic instability and oscillation due to excessive rocking, the center of mass, including that of the table,
should be within the pyramid defined by connecting the center point of each isolator with an apex point, whose vertical height
is equal to 1/2 the shortest distance between isolators– see Fig. 3.5.
Since the table top tends to be the heaviest component, to ensure the system is within the stability zone the system center of
mass should be near the center of the table or below the table top surface. It may be necessary to lower the center of mass by
relocating equipment on the table or by using accessory shelves situated below the table surface.
Fig. 3.5 System stability zone