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INOVANCE TECHNOLGY EUROPE GmbH
SV660N Startup Procedure_EN_v1.4_20220826.docx
6.6.4 INERTIA RATIO CALCULATION
In some systems it is not possible to calculate the system inertia ratio with the InoDriverShop tool because the
axis cannot be moved manually or the axis is coupled to another axis.
In this type of systems, the "Online Inertia identification" tool can be used or the inertia can be calculated
manually with the following procedure.
In this example the inertia ratio of the Inovance’s motor MS1H1-40B30CB and a 400g and 95mm diameter
pulley is calculated. In this case we can know the inertia of the load, but normally this data is not known
exactly. Therefore, we will calculate the inertial ratio without taking into account the pulley data.
To calculate the ratio of inertia we need to perform a step movement of the axis with load, and trace this
movement using the InoDriverShop Oscilloscope:
From these graphs we can obtain the maximum speed of the movement at the end of the ramp, the
acceleration time and the current feedback during the acceleration:
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