Description • 65
Pneumatic Control Unit
The pneumatic control unit filters, regulates and distributes compressed air to the circuits supplying the
various appliances. The control unit is situated at the rear of the supporting bench.
The filtering unit consists of a pair of self-cleaning filters (primary and secondary filter).
There is also a pressure gauge and a manual pressure regulator for measuring and regulating the air
pressure at the input of the air bearing supply circuit, respectively.
Figure 30 Pneumatic Control Unit
1. Pressure regulator
2. Air pressure gauge
3. Secondary filter
4. Primary filter
5. On-off valve
6. Air inlet
Axis Air Bearings
The machine axis sliding system is made up of air bearings that run on guideways and ensure the bearing
and friction-free movement of the moving parts.
The parts are borne by a flow of compressed air supplied by the pneumatic control unit to the air bearings
so as to form a thin air cushion between the bearings and their corresponding guideways.
The pressure switch S2, situated below the pneumatic control unit and the main solenoid valve, measures
the minimum pressure required at the input of the air bearing supply circuit and consequently only gives its
consent to the axis driving motors if there is sufficient pressure.
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