Sanyo Denki Sanmotion R 3E S, Instruction Manual, Page: 432 / 514

11
．
Selection
11-3
11.1.4 Calculate motor shaft conversion load torque (T
L
)
■
Ball screw (in horizontal axis)
■
Ball screw (in vertical axis)
When motor drives upward
When motor drives downward
■
When ball screw stops (in horizontal axis)
■
When ball screw stops (in vertical axis)
F: External force [kg]
η
: Transmission efficiency
μ : Coefficient of friction
W: Moving part mass [kg]
P: Ball screw lead [m]
G: Reduction ratio
T
L
=
(F + ( μ +1)W)
η
×
P
2
π
9.8
[N
・
m] ×
1
G
×
T
L
=
(F + (
μ
-1)W)
η
×
P
2 π
9.8
[N ・ m] ×
1
G
×
[N
・
m]
T
L
=
F
η
×
P
2 π
9.8
×
1
G
×
T
L
=
(F+W)
η
×
P
2
π
9.8
[N
・
m] ×
1
G
×
T
L
=
(F +
μ
W)
η
×
P
2 π
9.8
[N
・
m] ×
1
G
×