Servo gearheads provide mechanical advantage by multiplying motor torque while reducing the driven load’s reflected inertia back again to the motor.
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Have you any idea why we still make use of today gearboxes while servo motors becoming more servo motor and gearbox powerful and more advanced? The gearboxes are found in many situations in mixture with a servo motor, for instance because they have low backlash and are able to handle high torque. But still we didn’t give an answer to the previous query: why! In this article we discuss the procedure of a servo drive and translate this to the gearboxes.
Technically translated tis methods to follow or execute a command. A servo electric motor follows the (complex) job given to him.
For industrial applications, servo motors are used where a drive-system needs to be accurate or highly powerful. The feedback to the electric motor is done through a resolver (analogue sensor of rotation) or encoder (digital 
sensor of rotation). A servo motor is controlled by a servo amplifier, possibly with a shaft controller.
The rotation frequency of the actuator is returned by the resolver or encoder. This is capable in addition to the rotational quickness, also to look for the placement of the rotor and the path of rotation. The servo amplifier compares the established rotational frequency with the measured rotational frequency. At this point the servo amplifier can drive the actuator to the required values.
Interesting, AC Servo Motors have no significant disadvantages more! Therefore, why would you use a gearbox?
This has the following reasons:
If you want a very low rate, possibly in combination with an increased torque.
If you want high torque. (Actuators with high torque are available, but they are exponentially more expensive when compared to smaller servomotors)
Inertia matching, to be able to prevent that the strain determines the behaviour of the engine.
In order to absorb the high radial or axial forces of the application.
If you want to go “nearby” otherwise the servomotor shines the application. Gearboxes can be found in right-angled versions.
Baldor’s GBSM-series of low backlash, servo motor rated gearheads, mount easily and directly onto AC brushless servo motors to provide industrial motion control equipment with torque multiplication and proper inertial matching. These gearheads are designed for servo applications needing precision, durability, and long trouble-free operation.