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How does one configure the Inertia and Friction parameters in ST MC Workbench

Question asked by Martin Schmitt on May 14, 2018
Latest reply on May 17, 2018 by PALANO Carmelo Marcello


When not using the motor profiler and instead writing all details by hand into the Motor Control Workbench (with Hall Sensors, Manual editing of PI variables disabled) at Motor - Parameters, there are fields for Inertia and Friction. So far, so good. Just the units are a bit confusing:

Inertia: uN*m*s2

Friction: uN*m*s


I thought that inertia had the units kg*m² and friction N*m, which I wasn't able to match with the given units.

Any clues how to do this right? Also does u stand for micro in this case or for something else?