Yamaha YP-X Series, Руководство пользователя

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CHAPTER 6 Specifications
6-21
2-3 Example of moment of inertia calculation
It will be assumed that the chuck and workpiece are at a position offset by 10cm
from the R axis by the stay, as shown in Fig. 6-22.
The moment of inertia is calculated with the following three factors. However,
the load material will be aluminum, and the density =0.0026kg/cm
3
.
8cm
2cm
2cm
R Axis
1cm
1cm
1cm
2cm
4cm
6cm
4cm
Stay
Chuck
Work
Fig. 6-22
1. Moment of inertia of the stay
From Fig. 6-23, the weight is:
Ws =
ρ
abc = 0.0026
×
10
×
2
×
2
= 0.1 (kg)
From equation (6.4), the
moment of inertia is:
Fig. 6-23
10cm
2cm
2cm
4cm
0.1
×
(10
2
+2
2
)
12
×
980
0.1
×
4
2
980
0.0025 (kg · cm · sec
2
) = Jc = +
Center line
R Axis