Newport IPV, Installation Manual

Page: 57 / 65

18
B
B
⁄
2
3B
⁄
4
May Be Stable Region
Stable Region
Figure 3.1 — System Stability
B. 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.
C. 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.
3.3.1 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.
3.3.2 Air Quality
Oil, water, or debris in the air supply may contaminate the leveling valves
or isolator damping system and degrade performance. Use of the Newport
model ARF Air Regulator and Filter in the air supply will prevent this
occurrence. The filter does requires occasional cleaning.
Maintenance
3.3