3.5.3. Example of permitted inertia moment calculation

(1) Simple 2-D model

Figure 3.8 2-D Load model

– Load weight

– Inertia moment in X direction from weight center of load

– Inertia moment in Y direction from weight center of load

– Inertia moment in Z direction from weight center of load

- Inertia moment from R2 axis rotation center

- Inertia moment from B axis rotation center

- Inertia moment from R1 axis rotation center

☞Load condition: Stainless steel with length and width of 250mm and thickness of 200mm (Mass )

① Permitted weight limit

Weight of workpiece (): (permitted weight) => satisfied

② Permitted inertia moment limit

Inertia moment of load from the weight center Jxx= 0.838 [kgfm2], Jyy= 0.838 [kgfm2], Jzz= 1.022 [kgfm2]

R2 axis inertia moment ()

③ Conclusion

It is safe because the weight, torque and inertia moment all satisfy the limited condition