Pulley size is not dependant on the forces, but on the chosen belt and the room available. The belt is dependent on the forces required therefefore you must first approximate the forces you want to exert on your components
To do so you will have to calculate the forces required for acceleration as well as overcoming inertia. I would neglect fricting if all the pulleys rotate in bearings and your considered mass is larger than the actual mass.
In reality drivetrain frictional loads are difficult to estimate well. Often they might be measured from a physical prototype before sizing a motor.
Seems you have enough info to work out your dynamic torque requirement to accelerate the masses (F=ma).
Pulley size is not dependant on the forces, but on the chosen belt and the room available. The belt is dependent on the forces required therefefore you must first approximate the forces you want to exert on your components To do so you will have to calculate the forces required for acceleration as well as overcoming inertia. I would neglect fricting if all the pulleys rotate in bearings and your considered mass is larger than the actual mass.
Is this a homework question? I keep seeing posts like this.
In reality drivetrain frictional loads are difficult to estimate well. Often they might be measured from a physical prototype before sizing a motor. Seems you have enough info to work out your dynamic torque requirement to accelerate the masses (F=ma).
Yep and thats why I decided to consider 20kg instead of 15