Yaskawa Large Capacity Sigma II Series - Manual (Page 282)

7 Servo Selection and Data Sheets
7.1.1 Selecting Servomotors
7-6
Selecting Capacity Based on Machine Specifications
Fill out the data table below as an aid in selecting a drive system. When the machine data
table is complete, use the Servomotor Sizing Software to select motor capacity.
Table 7.1 Machine Data Table
Ball Screw Horizontal Axis Device Configuration
Load mass
∗1 W kg
Thrust F N
Friction coefficient µ
Overall efficiency η
Gear ratio
∗2 R (=N
M
/N
L
)
Gear + coupling
∗3 Jg
kg
•
cm 2
Ball screw pitch P mm
Ball screw diameter D mm
Ball screw length L mm
Ball Screw Vertical Axis
Load mass W1 kg
Counterweight W2 kg
Friction coefficient µ
Overall efficiency η
Deceleration ratio R (=N
M
/N
L
)
Gear + coupling Jg
kg
•
cm 2
Ball screw pitch P mm
Ball screw diameter D mm
Ball screw length L mm
Timing Belt
Load mass W kg
Thrust F N
Friction coefficient µ
Overall efficiency η
Deceleration ratio R (=N
M
/N
L
)
Gear + coupling Jg
kg
•
cm 2
Pulley moment of inertia J
P kg • cm
2
Pulley diameter D mm
Gear + coupling
Jg
Ball screw
Table W
Motor
F
Gear + coupling
Jg
Motor
Ball screw
W2
W1
Gear + coupling
Jg
Motor
W
F
D
Timing belt
Pulley
Jp