19Installation
Introduction
The air supply to the NC4 must conform to ISO
8573-1 air quality of class 1.7.2 and be moisture-
free. If the air quality cannot be guaranteed, an
optional de luxe air filter unit is available from
Renishaw (see “Parts list – air supply
accessories” on page 78).
The NC4 requires a continuous regulated air
supply of between 3 bar (43.5 psi) minimum and
6 bar (87 psi) maximum.
Failure of the air supply allows a passive seal
inside each NC4 unit to protect the unit from the
ingress of contaminants. This causes the unit to
enter a trigger state. The laser beam will not be
seen exiting the transmitter unit, and the status
LEDs on the transmitter and receiver units will
display red (when the tool setting mode is
selected).
The cause of the air failure should be determined
and rectified.
Best practices
● Where possible, tap into the air supply that
exits the machine air supply filter / regulator
unit. Do not connect the NC4 to an oiled air
supply.
● Use blanking plugs, supplied with the air
assembly kit, when feeding air pipe through
the conduit / machine.
● Before connecting the air pipe to the inlet of
the NC4 unit, briefly switch on the air supply
to clear out any debris from the pipe. When
no more debris is emitted, switch off the air
supply and connect to the NC4.
● When installing the air pipe supply to the
NC4, keep runs as short as possible to
minimise pressure drop.
● If the temperature of the air supply is
greater than 5 °C above ambient and is
humid, an air drier will be required.
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