Rockwell Automation Motion Analyzer Software - Manual (Page 212)

212 Rockwell Automation Publication MOTION-UM004B-EN-P - October 2012
Chapter 3 Understanding Your System Solution
To correctly calculate the inertia ratio, the Input Pinion Inertia must be removed
from the Reported Application Inertia and added to the Reported Motor Inertia.
For example, the system in Figure 156 with an MPL-B680F motor and a
VDT100-MF1 gearbox has a 6.50:1 inertia ratio.
Figure 156 - Inertia Ratio Calculation
Click the Motor tab to view the Reported Application Inertia and the Reported
Motor Inertia.
Figure 157 - Motor Tab
Reported Application Inertia - Input Pinion Inertia
Reported Motor Inertia + Input Pinion Inertia
Inertia Ratio =