How to account for external force when I am sizing a servo motor for a belt-driven linear actuator?

[Imposter666]

I need to size a servo motor for a belt-driven actuator that will be pushing against 1500N external force in a horizontal position. I calculated the load inertia of the brackets that are mounted on the carriage. But I am uncertain as how to account for this external force in my inertia ratio calculations.

 

[drawoh]

Imposter666,

If this is radial force on the shaft, your motor specifications should specify something.

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JHG