As an example, consider a person riding a bicycle, with the person acting like the engine. If that person tries to trip that bike up a steep hill in a gear that is made for low rpm, she or he will struggle as
they attempt to maintain their balance and achieve an rpm that may allow them to climb the hill. However, if they change the bike’s gears right into a rate that will produce a higher rpm, the rider will have
a much 
easier period of it. A constant force could be applied with smooth rotation being offered. The same logic applies for commercial applications that require lower speeds while maintaining necessary
torque.
• Inertia complementing. Today’s servo motors are generating more torque relative to frame size. That’s due to dense copper windings, light-weight 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 servo gearbox electric motor to the inertia of the strain allows for using a smaller electric motor and results in a far more responsive system that is easier to tune. Again, that is attained through the gearhead’s ratio, where the reflected inertia of the strain to the electric motor is decreased by 1/ratio2.
Recall that inertia may be the way of measuring an object’s level of resistance to change in its movement and its function of the object’s mass and shape. The higher an object’s inertia, the more torque is required to accelerate or decelerate the thing. This means that when the load inertia is much larger than the motor inertia, sometimes it can cause extreme overshoot or enhance settling times. Both circumstances can decrease production collection throughput.
However, when the electric motor inertia is bigger than the load inertia, the electric motor will need more power than is otherwise essential for the particular application. This increases costs because it requires paying more for a engine that’s bigger than necessary, and because the increased power consumption requires higher operating costs. The solution is by using a gearhead to complement the inertia of the motor to the inertia of the load.
