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NC4 non-contact tool setting system: System installation
Air supply information
The barrier air supply to the NC4 unit must conform to BS ISO 8573-1 air quality of Class 1.4.2 and be
moisture-free. If the air quality cannot be guaranteed, an air preparation pack is available from Renishaw;
see the NC4 non-contact tool setting accessories data sheet (Renishaw part no. H-2000-2223).
The NC4 unit requires a continuous regulated air supply of up to 0.6 MPa (87.02 psi) maximum.
Failure of the air supply causes a PassiveSeal™ inside each NC4 unit to activate, protecting 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 head.
The cause of the air failure should be determined and rectied.
Best practices
• Where possible, tap into the air supply that exits the machine air supply lter/regulator unit. Do not
connect the NC4 unit to an oiled air supply.
• When cutting air pipe, ensure it is cut straight, as a tapered cut could compromise sealing.
• Use blanking caps, supplied with the air preparation pack, when feeding air pipe through the conduit/
machine.
• Before connecting the air pipes to the inlet of the NC4 unit, briey 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 unit.
• When installing the air pipes to the NC4 unit, keep runs as short as possible to minimise pressure
drop.
• If the temperature of the air supply is greater than 5 °C (41 °F) above ambient and is humid, an air
dryer will be required. NC4 installation packs are supplied with an air preparation pack including dryer
(Renishaw part no. A-6435-4000).
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