YASKAWA VS-626M5 Instruction Manual page 280

Appendix
15.2.3 Inertial Moment and GD
15
2
Linear Operator Inertial Moment
J
Fig. 15.3 shows linear operation such as a motor turning a ball screw to drive a table. Example (a) shows
horizontal operation, and example (b) shows vertical operation. Both horizontal and vertical inertial mo-
ments J and J take the full load mass m
H V
can be expressed using the following formula.
2
m P
L B
J
= (kg ⋅
H
4π
2
(m + m ) P
L C
J
=
V
4π
2
m
L
Motor
P
(a) Horizontal Operation
Fig 15.13 Linear Operator Inertial Moment
(kg), counterweight mass m
L
2
m )
2
B
2
⋅
(kg m )
Motor
µ
m
C
Counter-
weight
B
(b) Vertical Operation
15 -8
(kg), and ball screw reed P
C
m
L
P
B
, and
B