User Manual
Appendix
EM1 Series AC Servo Motors
EM1-01-0-EN-2110-MA
Page
66
of
72
Legend table „Motion Profile“
1
Acceleration time
2
Deceleration time
3
Stop time
4
Cycle time
5
Constant-velocity time
6
Travel distance (shaded area)
13.1.3
Load Inertia Calculation
Transmission mechanism
Load inertia calculation
Ball Screw
J
L
= J
B
+
WB
p
2
4π
2
B
p
: Ball screw lead (m)
Pulley & Belt
J
L
= J
P
+
W × D
2
4
Rotary Table
J
L
= J
T
+ n × (J
w
+ WD
w
2
)
(Continuing contents of previous page)
Load inertia ratio suggested bellowing 30 times of normal operation
𝐋𝐋𝐋𝐋𝐋𝐋𝐋𝐋
𝐢𝐢𝐢𝐢𝐢𝐢𝐢𝐢𝐢𝐢𝐢𝐢𝐋𝐋
𝐢𝐢𝐋𝐋𝐢𝐢𝐢𝐢𝐋𝐋
=
(
𝐉𝐉
𝐢𝐢
+
𝐉𝐉
𝐋𝐋
)
𝐉𝐉
𝐢𝐢
<
𝟑𝟑𝟑𝟑
13.1.4
Motor Speed Calculation
Transmission mechanism
Motor speed calculation
Ball Screw
N =
V
B
p
× 60 V
∶
velocity (
m
s )
Pulley & Belt
N =
V
π
D × 60 V
∶
velocity (
m
s )
Rotary Table
N =
𝜔𝜔
π
× 30
𝜔𝜔 ∶
angular velocity (
rad
s )