Siemens SINAMICS S120 System Manual page 38

Configuration
3.3 Configuring the hydraulics
Mounting
In order to ensure good control quality, backlash-free mountings, e.g. base or flange
mountings, must be used.
Flange mounting
①
②
③
Figure 3-1
Mounting position
The mounting position depends on the actual machine situation, and influences the choice of
shutoff valves. Vertical loads must be secured using poppet (face) valves. Forces due to
weight must be taken into account in the final calculation of the operating pressure (p0344).
Possible cylinder mounting position, see "Figure 5-19 Mounting position of the drive referred
to the A side (Page 184)".
Seal, friction
Suitable seals must be used to minimize friction. Transitions from static (stiction) to sliding
friction have a particularly adverse effect on the control result.
The slide guide friction must be added to the cylinder friction.
Cylinder pipes
The distance between the cylinder and servo solenoid valve must be kept as short as
possible for the sake of the drive's natural frequency (compressibility of the oil volume). In
ideal cases, the servo solenoid valve is flange-mounted directly on the cylinder.
Position measuring system
The incremental and absolute position measuring systems supported by the HLA module are
mounted on the machine slides. It is also possible to use position measuring systems (SSI
encoders) integrated in the cylinder.
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Flange at front
Flange at rear
Foot mounting
Cylinder mounting
System Manual, 04/2015, 6SL3097-4BA00-0BP1
Hydraulic Drive