SMC Networks CRQ2 Series, Руководство по эксплуатации

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５．
Setting rotation time
The load inertia lead to cause the damage of the shaft and internal parts even if generated torque of rotary
actuator is small. The calculation of load inertia moment and kinetic energy is necessary to set the rotation
time for operating the rotary actuator.
5-1
Inertia moment
Inertia moment indicates scales how hard to rotate the object, and also how hard to stop rotating object.
An object started by the rotary actuator is getting to have inertia force. When the rotary
actuator stops at the stroke end, the actuator received big impact (kinetic energy) due to
inertia force. Please refer below for calculation of kinetic energy
Allowable kinetic energy for the rotary actuator is limited. The limit of rotation time is obtained
by calculating inertia moment. Please refer following for obtaining inertia moment.
Basic inertia moment
2
r m I
 
m
：
Weight of load. kg
r
：
Load center of gravity and distance
of rotation axis. m
This shows inertia moment of
“m (weight)” at “r” from the rotation axis. Calculation of inertia moment
depends on the shape of the object. Please refer the table on the next page for inertia moment calculation.
-24-
Ｅ：
Kinetic energy J
Ｉ：
Inertia moment kg
・
m
２
ω：
Angular speed rad
／
s
2
I
2
1
E
   
r
m
Fig. 9
2020-10-13 10:36
DI987004