3. Life
23
3. Life
The mechanical life of the actuator is represented by that of the guide receiving the greatest moment load.
Operation life of the linear guide is to be determined by the total driving distance which can reach without having
90% flaking (peeling on rail surface).
Operation life can be figured out with the calculation method shown below.
3.1 How to Calculate Operation Life
For the operation life of the linear guide, use the dynamic allowable moment stated in 1.2 Specifications, and
figure out with the formula below.
㻌 㻌
L =
㻌
㻌 㻌
㻌
䞉
10000km
㻌 㻌 㻌 㻌
L : Operation life (km)
㻌
C
M
: Dynamic allowable moment (N
䡡
m)
㻌 㻌 㻌 㻌
M : Moment to work (N
䡡
m)
㻌
10000km : Standard rated life of Single-Axis actuator
In addition, have a calculation for the drop of life with the formula below if there is a concern that the life could
drop due to the condition of vibration or way to be attached.
㻌 㻌 㻌 㻌
L =
㻌 㻌 㻌 㻌 㻌 㻌 㻌 䞉㻌 㻌 㻌 㻌 㻌 㻌 㻌 䞉
㻌 㻌
㻌 㻌 㻌
㻌
䞉
10000km
㻌 㻌 㻌 㻌
L : Operation life (km)
㻌
C
M
: Dynamic allowable moment (N
䡡
m)
M : Moment to work (N
䡡
m)
㻌
f
ws
: Standard operational coefficient
f
w
:
ᴾ
Load coefficient
㻌
f
䃐
: Attachment coefficient
㻌 㻌 㻌 㻌
10000km : Standard rated life of Single-Axis actuator
Explained below is regarding the standard operational coefficient f
ws
, load coefficient f
w
and attachment coefficient f
䃐
.
Refer to the contents below to set them up.
[Standard operatinal coefficient f
ws
]
For Single-Axis actuator described in this manual, f
ws
= 1.2. It is a coefficient defined for each model, some
models such as RCS3 high-speed type is 1.35.
C
M
M
3
C
M
M
3
f
w
f
ws
1
f
䃐