HSD ES327 - Page 60

4 Installation and commissioning
60
HSD S.p.A. © - 0104h03a.fm100713
4.7.3 Tool change piston drive
The electrospindle is fitted with an oil cylinder for tool change purposes.
An example system layout is shown below.
The circuit indicated here is merely an example.
Reference Description
1 High pressure circuit (50 bar Max)
2 Low pressure circuit
3 Bistable solenoid valve
4 Safety switch on the piston return circuit (calibrated at 30 bar Max)
5 Oil inlet for tool release
6 Oil inlet for tool locking
It is not necessary to supply 50 bar constantly for tool locking.
When the safety switch has confirmed piston recovery at the upper limit switch, you can
reduce the pressure to 10 bar.
1
50 bar
30 bar
2
3
4
5
6
50 bar