The profile can either be selected for an application which has to move between different speeds or different positions. Otherwise, the user can define a motion profile including up to 6 reference points. The user starts by defining the motion profile: if the acceleration and speed of the system are already known, they can be inputted directly. The Servo motor sizing apreadsheet includes all the features needed to size a system from beginning to end.

Allow to filter the results depending on the desired parameters, may it be the overall weight of the motor/gearbox, the torque, the current needed, etc.

Provide the user with a list of results by only clicking a button, avoiding all the iterations needed for the 'classical' approach.

Give the possibility of selecting the motors and gearboxes from a defined list, avoiding the hassle of looking through the suppliers websites.

Include the whole process of calculating the load (either linear or rotary) of an application, including the motion profile definition.

I wanted to create a spreadsheet that could: This is what lead to the creation of the Servo motor sizing spreadsheet. Also, I found myself creating a new spreadsheet/sketch/calculation every time a project needed the sizing of a servomotors, bringing to a big frustration for the loss of time. I don't like to perform iterations, since I think that the human mind is made for something greater than that.

Verify if any of the solutions previously defined can fulfil the additional force.

Evaluate the additional torque caused by the inertia of the motor and gearbox.

Define a range of motors and gearboxes that fit with the speed/torque requirements.Define and calculate the motion profile.When starting to increase the acceleration of a system, the sizing process becomes less straight forward and some iterations are normally needed to reach an optimum solution. The sizing of servomotors is fairly simple for nearly static applications, where the inertia of the system is negligible compared to the static load. Servomotors are relatively cheap and provide great precision and flexibility, especially if compared with more traditional methods like cams. Nowadays, most applications in mechanical engineering include a servomotor.

Why I created the Servo motor sizing spreadsheet Introduction

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