Newport IPV, Руководство по установке

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system may be stable. If the combined C-G is outside both regions, the
system will probably be unstable.
Figure 14 — System Stability
3. Improving leveling response times: If the system is stable, the re-
leveling response time may be decreased by increasing the system
pressure. In addition, the needle valves may be opened until the system
oscillates and then closed slightly. This is desirable if components are
moving over the surface of the table.
For systems where the loads are seldom changed, slower re-leveling may
be beneficial. This is accomplished by closing the needle valves slightly
and/or decreasing the system pressure.
All needle valves should be opened the same amount for each isolator
that they supply.
4. Table loads and/or load positions change: If the loads are moving or
changing significantly, the control arms may require adjustment. Each
time the load is changed, check the relationship of the centering guide to
the flange on each isolator. If the desired
1
⁄
4
inch is not maintained,
adjust the overall system pressure and/or the sensor positions.
Newport Vibration Control Systems require little maintenance. No periodic
maintenance is required.
3.3 Maintenance
3.3.1 Cleaning
Newport optical table tops are made of 400 series stainless steel. This
material is relatively corrosion resistant. It may be cleaned by applying non-
abrasive liquid household cleaner to a rag and wiping the table top. Avoid
abrasive cleaners as they will foul the mounting holes.
All other surfaces on the table top or isolator system may be cleaned in the
same manner.