SERVO SELECTION AND DATA SHEETS
4.1.1 Selecting a Servomotor
— 4-8 —
Roll Feeder
Load GD
2
J
ℓ
kg
¡
cm
2
(lb
¡
in
2
.)
Press force
Tension
F
N (lb)
Press force
P
N (lb)
Roller
Roller diameter
D
mm (in.)
Roller
Coefficient of friction
µ
Motor
Overall efficiency
η
Motor
J
ℓ
Gear ratio
R (= Nm/Nl)
Gear+coupling
Jg
Gear+coupling
Jg
kg
¡
cm
2
(lb
¡
in
2
.)
Jg
Rotor
Load GD
2
J
ℓ
kg
¡
cm
2
(lb
¡
in
2
.)
Load torque
T
ℓ
N
¡
m (lb.in.)
T
ℓ
Overall efficiency
η
Motor
T
ℓ
Gear ratio
R (= Nm/Nl)
Gear+coupling
Motor
Gear+coupling
Jg
kg
¡
cm
2
(lb
¡
in
2
.)
Gear+coupling
Jg
J
ℓ
Others
Load GD
2
J
ℓ
kg
¡
cm
2
(lb
¡
in
2
.)
Load torque
T
ℓ
N
¡
m (lb.in.)
Motor speed
Nm
min
−
1
DUTY
td
s
Positioning time
ts
s
Accel/decel time
ta
s
Duty cycle
DUTY
td
s
Positioning distance
Ls
mm (in.)
Moving member speed
V
ℓ
m/min
Positioning time
ts
s
Accel/decel time
ta
s
Enter either V
ℓ
or ts. If both are entered, specify priority.
D
Operating environment
D
Operating temperature
D
Other
4
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