User`s manual

CHAPTER 6 Specifications
6-22
2. Moment of inertia of the chuck
When the chuck form resembles that shown in Fig. 6-24:
Ws = 0.0026×1×4×6
= 0.06 (kg)
Fig. 6-24
3. Moment of inertia of the workpiece
8cm
4cm
R Axis
2cm
ρ π D
2
h
4
0.0026π×2
2
×4
4
0.03 (kg)
=Ww
=
=
0.03×2
2
8×980
0.03×8
2
980
0.002 (kg · cm · sec
2
)
=Jc
=
+
From equation (6.3):
From Fig. 6-25:
Fig. 6-25
4. Total weight
W = Ws+Wc+Ww=0.19 (kg)
5. Total moment of inertia
W = Js+Jc+Jw=0.0085 (kg·cm·sec
2
)
The allowable R-axis moment inertia is 0.01 (kg·cm·sec
2
), so there is no prob-
lem with the above point.
8cm
1cm
6cm
4cm
R Axis
0.06×(1
2
+4
2
)
12×980
0.06×8
2
980
0.004 (kg · cm · sec
2
)
=
Jc
=
+
From equation (6.4):