2. Fitting and pneumatic installation
2−16
Festo P.BE−CPX−CMA X−SYS−EN en 0908N H
1 Favourable natural
vibration behaviour
2 Unfavourable natural
vibration behaviour
12
Fig.2/3: Example: Favourable and unfavourable natural vibration behaviour of the mass
Mass moment of inertia for semi−rotary drives
The mass moment of inertia must not change during the
m
ovement. For this reason, the following applies for the
mounting position, depending on the load:
Centre of gravity in the axis of rotation
Mass is rotationally symmetri
cal:
} any mounting position permissible.
Centre of gravity in the axis of rotation
Mass is rotationally asymmetrical:
} only vertical mounting position
permissible, drive
shaft points upward or downward (see example Fig.2/3).
Centre of gravity outside of the axis of rotation
(not recommended):
} o
nly vertical mounting position permissible, drive
shaft points upward or downward.