Global Pneumatic System
Global User Manual
4-5
Pneumatic System
If the compressed air system at the facility is reasonably effi-
cient, filter life should reach a maximum of 1 year. Even with the
most compressed air system it is recommended to replace both
filter elements at least once per year. Poor quality compressed air
will substantially reduce filter life.
The air prep system also includes a pressure gauge, which
should be factory set to 58 psi. A flow indicator is located on the
coalescing filter and will indicate green for normal flow and red
for a clogged element. This flow indicator should be routinely
monitored and if it shows red, the recommendation is to replace
both filter elements. If the elements are becoming clogged more
than one time per year, it may be necessary to install additional
filtration in the facility compressed air system.
The Bridge
The bridge is a rigid aluminum alloy assembly comprised of an
X rail supported by two (2) legs; a right leg (drive leg) and a left
leg. The aluminum alloy construction provides greater dampen-
ing capability and rapidly achieves thermal equilibrium, and thus
provides a very short settling time for the CMM. The drive leg is
mounted on the granite’s Y rail and is equipped with six (6) air
bearings. Three (3) in the front and three (3) in the rear. The two
(2) inner air bearings are preloaded and “lock” the bridge in
place when the CMM is not in operation.
Bridge
Y Rail & Air Bearing
Left Leg
X Rail
Drive Leg
Y Rail
Preloaded
Air Bearing
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