As servo technology has evolved-with manufacturers generating smaller, yet better motors -gearheads are becoming increasingly essential companions in motion control. Locating the ideal pairing must consider many engineering considerations.
• A servo motor operating at low rpm operates inefficiently. Eddy currents are loops of electric current that are induced within the engine during procedure. The eddy currents actually produce a drag force within the electric motor and will have a larger negative impact on motor efficiency at lower rpms.
• An off-the-shelf motor’s parameters might not be ideally suitable for run at a minimal rpm. When an application runs the aforementioned engine at 50 rpm, essentially it isn’t using most of its obtainable rpm. Because the voltage constant (V/Krpm) of the engine is set for an increased rpm, the torque constant (Nm/amp)-which is directly related to it-is definitely lower than it requires to be. Consequently, the application requirements more current to drive it than if the application had a motor particularly created for 50 rpm. A gearhead’s ratio reduces the engine rpm, which explains why gearheads are sometimes called gear reducers. Utilizing a gearhead with a 40:1 ratio,
the electric motor rpm at the input of the gearhead will be 2,000 rpm and the rpm at the output of the gearhead will be 50 rpm. Operating the electric motor at the higher rpm will enable you to avoid the concerns
Servo Gearboxes provide freedom for how much rotation is achieved from a servo. Many hobby servos are limited to just beyond 180 levels of rotation. Most of the Servo Gearboxes make use of a patented external potentiometer to ensure that the rotation amount is independent of the gear ratio 
installed on the Servo Gearbox. In such case, the small gear on the servo will rotate as much times as necessary to drive the potentiometer (and hence the gearbox output shaft) into the position that the transmission from the servo controller demands.
Machine designers are increasingly turning to gearheads to take advantage of the latest advances in servo motor technology. Essentially, a gearhead converts high-acceleration, low-torque energy into low-speed, high-torque result. A servo engine provides highly accurate positioning of its output shaft. When these two gadgets are paired with one another, they promote each other’s strengths, offering controlled motion that is precise, robust, and reliable.
Servo Gearboxes are robust! While there are high torque servos available that doesn’t indicate they are able to compare to the load capability of a Servo Gearbox. The small splined output shaft of a regular servo isn’t long enough, large enough or supported sufficiently to take care of some loads despite the fact that the torque numbers appear to be appropriate for the application form. A servo gearbox isolates the strain to the gearbox result shaft which is supported by a pair of ABEC-5 precision ball bearings. The external shaft can withstand extreme loads in the axial and radial directions without transferring those forces to the servo. Subsequently, the servo operates more freely and is able to transfer more torque to the output shaft of the gearbox.