3
Mounting and pneumatic installation
26
Festo – P.BE-CPX-CMAX-SYS-EN – en 2017-09b – English
Total load for linear drives and piston rod cylinders
Determine the permitted total load based on Tab. 3.3.
Mounting position
Maximum total load
Minimum total load
Horizontal (
á
= 0°)
m
max
0.1 * m
max
Vertical (
á
= 90°)
0.33 * m
max
0.1 * m
max
Diagonal (0°
á
90°)
(1 – 2/3 sin
á
) * m
max
0.1 * m
max
a
= Mounting position in [°]
m
max
= d² * p
sys
* 0.008 (maximum total load for horizontal mounting position [kg] )
d
= Cylinder diameter [mm]
p
sys
= Supply pressure [bar]
Tab. 3.3
Maximum and minimum total load
Example: load for DNCI-32 with p = 6 bar
Mounting position
Maximum total load
Minimum total load
Horizontal (
á
= 0°)
m
max
= 32
2
* 6 * 0.008 = 49.15 kg
0.1 * m
max
= 4.92 kg
Vertical (
á
= 90°)
0.33 * m
max
= 16.22 kg
0.1 * m
max
= 4.92 kg
Diagonal (45°)
(1 – 2/3 sin 45°) * m
max
= 25.98 kg
0.1 * m
max
= 4.92 kg
Tab. 3.4
Example total load
Note on mounting
Mount the load so that it is free of play.
Check whether a guide is required.
Mass moments of inertia for semi-rotary drives
Permitted mass moments of inertia for the semi-rotary drive DSMI in electronically regulated operation
with the CMAX are shown in the following table:
Semi-rotary drive
Permitted mass moment of inertia [10
-4
kgm
2
]
DSMI-25-...
15 … 300
DSMI-40-...
60 … 1200
DSMI-63-...
300 … 6000
Tab. 3.5
Permitted mass moment of inertia
Festo supports calculation of the mass moment of inertia with software for calculation of
mass moments of inertia of the second degree for various basic bodies and standard
parts from Festo – e.g. push-on flange for DSMI (
è
www.festo.com/sp, search
term: mass moment of inertia (Mass moment of inertia)).
Note
Natural oscillations of the load can lead to malfunctions.
Fasten the load so that vibration is kept to a minimum.
Avoid loads on long, flexible lever arms.
