Stepping motors-inertia ratio What is the recommended ratio of load inertia to rotor inertia?
For standard stepping motor systems, a maximum ratio of 10:1 is recommended. For Alpha Step systems, a maximum inertia ratio of 30 is recommended. Large inertia ratios cause large overshooting and undershooting during starting and stopping, which can affect start-up times and settling times. Depending on the conditions of usage, operation may be impossible. Inertia Ratio = Total Inertia of the Machine/ Rotor Inertia of the Motor When the recommended ratios are exceeded, we recommend a geared motor. Using a geared motor can increase the drivable inertia load.
