As an example, consider a person riding a bicycle, with the person acting like the motor. If that person tries to trip that bike up a steep hill in a gear that’s created for low rpm, he or she will struggle as
they attempt to maintain their balance and achieve an rpm that will allow them to climb the hill. However, if indeed they change the bike’s gears into a rate that will create a higher rpm, the rider could have
a much easier time of it. A constant force can be applied with even rotation being offered. The same logic applies for commercial applications that want lower speeds while keeping necessary
torque.
• servo gearbox inertia coordinating. Today’s servo motors are producing more torque in accordance with frame size. That’s because 
of dense copper windings, lightweight materials, and high-energy magnets.
This creates greater inertial mismatches between servo motors and the loads they are trying to move. Utilizing a gearhead to raised match the inertia of the motor to the inertia of the load allows for utilizing a smaller motor and outcomes in a more responsive system that is simpler to tune. Again, this is achieved through the gearhead’s ratio, where the reflected inertia of the load to the electric motor is decreased by 1/ratio2.
Recall that inertia is the measure of an object’s level of resistance to change in its movement and its function of the object’s mass and form. The greater an object’s inertia, the more torque is required to accelerate or decelerate the thing. This implies that when the strain inertia is much bigger than the motor inertia, sometimes it can cause extreme overshoot or enhance settling times. Both circumstances can decrease production line throughput.
However, when the electric motor inertia is bigger than the strain inertia, the motor will require more power than is otherwise essential for the particular application. This increases costs since it requires paying more for a engine that’s bigger than necessary, and because the increased power intake requires higher operating costs. The solution is to use a gearhead to complement the inertia of the electric motor to the inertia of the strain.