As an example, look at a person riding a bicycle, with the person acting like the electric motor. If see your face tries to ride that bike up a steep hill in a gear that’s made for low rpm, he or she will struggle as
they attempt to maintain their balance and achieve an rpm which will allow them to climb the hill. However, if indeed they shift the bike’s gears into a speed that will produce a higher rpm, the rider will have
a much easier time of it. A continuous force can be applied with clean rotation being provided. The same logic applies for commercial applications that want lower speeds while maintaining necessary
torque.

• Inertia matching. Today’s servo motors are generating more torque relative to frame size. That’s servo gearbox because of dense copper windings, light-weight materials, and high-energy magnets.
This creates greater inertial mismatches between servo motors and the loads they want to move. Utilizing a gearhead to better match the inertia of the motor to the inertia of the load allows for using a smaller motor and results in a more responsive system that is simpler to tune. Again, this is attained through the gearhead’s ratio, where in fact the reflected inertia of the load to the engine is decreased by 1/ratio2.

Recall that inertia may be the way of measuring an object’s resistance to change in its motion and its function of the object’s mass and shape. The greater an object’s inertia, the more torque is required to accelerate or decelerate the object. This implies that when the load inertia is much bigger than the motor inertia, sometimes it can cause excessive overshoot or increase settling times. Both circumstances can decrease production line throughput.

On the other hand, when the motor inertia is bigger than the strain inertia, the motor will require more power than is otherwise necessary for the particular application. This improves costs since it requires spending more for a engine that’s larger than necessary, and because the increased power usage requires higher working costs. The solution is by using a gearhead to match the inertia of the motor to the inertia of the load.