Example Of Moment Of Inertia Calculation - Yamaha YP-X Series Owner's Manual

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
1. Moment of inertia of the stay
From Fig. 6-23, the weight is:
Ws = ρ abc = 0.0026×10×2×2
From equation (6.4), the
moment of inertia is:
Jc =
4cm
6cm
Work
= 0.1 (kg)
2 2
0.1×(10 +2 ) 0.1×4
+
12×980
Stay
Chuck
4cm
Fig. 6-22
Center line
2cm
2cm
2
= 0.0025 (kg · cm · sec
980
6-21
CHAPTER 6 Specifications
3
.
R Axis
2cm
2cm
R Axis
2
)
Fig. 6-23