Motor Shaft Conversion Load Torque - Mitsubishi MELDAS HS Series Specifications And Instruction Manual

11-5 Motor shaft conversion load torque

The main load torque calculation expressions are shown below.
Type Mechanism
Z
2
Linear
Servo-
movement
motor
Z
1
Rotary
Z
movement 1
Servomotor
1/n
Vertical
movement
Guide
Chapter 11 Selection
T
L
F
η
0
F
C
W
F in the above expression is obtained from the lower expression
when the table is moved as shown on the left.
F = Fc + µ (W · g · F
T
T
L
LO
Z
2
Servomotor
When rising
When lowering
T
U
Counter-
T
F
weight
W
2
Load
W
1
Calculation expression
V
F
·
) =
3 πη
=
N
2×10
T : Load torque
L
F : Force in axial direction of linear motion
machine
η : Drive system efficiency
V : Speed of linear operation object
N : Motor speed
∆
S: Object movement amount per motor rotation (mm)
Z , Z : Deceleration ratio
1 2
)
0
Fc : Force applied on axial direction of moving section (N)
F : Tightening force on inner surface of table guide
0
W : Total weight of moving section
g : Gravitational acceleration
µ : Friction coefficient
Z 1
1
η
= Z · · T + T
LO F
2
T : Load torque
L
T : Load torque on load shaft
LO
T : Motor shaft conversion load friction torque
F
η
: Drive system efficiency
Z , Z : Deceleration ratio
1 2
n : Deceleration rate
T = T + T
L U F
· η 2
T = –T T : Load torque + T
L L U F
T : Unbalanced torque
U
T : Friction torque on moving section
F
− W
(W ) ·
1 2
·
g
=
2 × 10 3 πη
µ · (W
) · g · △
+ W
1 2
S
2 × 10 πη
= 3
W : Load weight
1
W : Counterweight weight
2
η : Drive system efficiency
g : Gravitational acceleration = 9.8
V : Speed of linear operation object
N : Motor speed
△S: Object movement speed per motor rotation
µ : Friction coefficient
11–13
F· △S
πη
3
2×10
1 1
η
= n · · T + T
LO F
(N· m)
(N· m)
(N· m)
(W – W ) · g ·
V
1 2
) =
△S
N
2 × 10 3 πη
(N· m)
(N)
(%)
(mm/min)
(r/min)
(N)
(kg)
2
(m/sec )
(N· m)
(N)
(N· m)
(kg)
(kg)
2
(m/sec )
(mm/min)
(r/min)
(mm)