As servo technology has evolved-with manufacturers creating smaller, yet more powerful motors -gearheads are becoming increasingly essential companions in motion control. Finding the optimum pairing must take into account many engineering considerations.
• A servo motor operating at low rpm operates inefficiently. Eddy currents are loops of electrical current that are induced within the engine during operation. The eddy currents in fact produce a drag pressure within the engine and will have a greater negative impact on motor efficiency at lower rpms.
• An off-the-shelf motor’s parameters might not be ideally suitable for run at a low rpm. When an application runs the aforementioned motor at 50 rpm, essentially it is not using all of its offered rpm. As the voltage continuous (V/Krpm) of the engine is set for 
a higher rpm, the torque continuous (Nm/amp)-which is directly related to it-is usually lower than it needs to be. Consequently, the application needs more current to operate a vehicle it than if the application had a motor specifically designed for 50 rpm. A gearhead’s ratio reduces the engine rpm, which is why gearheads are sometimes called gear reducers. Using a gearhead with a 40:1 ratio,
the engine 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 motor at the higher rpm will allow you to avoid the concerns
Servo Gearboxes provide freedom for just how much rotation is achieved from a servo. Most hobby servos are limited by just beyond 180 levels of rotation. Most of the Servo Gearboxes utilize a patented external potentiometer so that the rotation quantity is independent of the gear ratio installed on the Servo Gearbox. In this kind of case, the small equipment on the servo will rotate as much times as necessary to drive the potentiometer (and hence the gearbox result shaft) into the placement that the transmission from the servo controller calls for.
Machine designers are increasingly embracing gearheads to take benefit of the latest advances in servo electric motor technology. Essentially, a gearhead converts high-acceleration, low-torque energy into low-speed, high-torque output. A servo electric motor provides highly accurate positioning of its output shaft. When these two devices are paired with each other, they promote each other’s strengths, offering controlled motion that’s precise, robust, and dependable.
Servo Gearboxes are robust! While there are high torque servos available that doesn’t indicate they can compare to the load capability of a Servo Gearbox. The tiny splined output shaft of a regular servo isn’t long enough, large enough or supported sufficiently to handle some loads even though the torque numbers appear to be appropriate for the application form. A servo gearbox isolates the strain to the gearbox output shaft which is supported by a set of ABEC-5 precision ball bearings. The external shaft can withstand intense loads in the axial and radial directions without transferring those forces to the servo. In turn, the servo runs more freely and is able to transfer more torque to the output shaft of the gearbox.