As servo technology has evolved-with manufacturers producing smaller, yet better motors -gearheads have become increasingly essential partners in motion control. Locating the ideal pairing must consider many engineering considerations.
• A servo engine operating at low rpm operates inefficiently. Eddy currents are loops of electric current that are induced within the motor during operation. The eddy currents in fact produce a drag pressure within the electric motor and will have a greater negative effect on motor performance 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 electric motor at 50 rpm, essentially it is not using most of its available rpm. Because the voltage constant (V/Krpm) of the engine is set for an increased rpm, the torque continuous (Nm/amp)-which is directly related to it-is usually lower than it requires to be. Because of this, the application needs more current to drive it than if the application form had a motor specifically created for 50 rpm. A gearhead’s ratio reduces the engine rpm, which is why gearheads are occasionally 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 servo motor gearbox output of the gearhead will be 50 rpm. Operating the electric motor at the bigger rpm will enable you to avoid the concerns
Servo Gearboxes provide freedom for how much rotation is achieved from a servo. The majority of hobby servos are limited by just beyond 180 levels of rotation. Many of the Servo Gearboxes utilize a patented exterior potentiometer so that the rotation quantity is independent of the equipment ratio set up on the Servo Gearbox. In such case, the small gear on the servo will rotate as many times as essential to drive the potentiometer (and therefore the gearbox result shaft) into the placement that the transmission from the servo controller demands.
Machine designers are increasingly turning to gearheads to take benefit of the latest advances in servo engine technology. Essentially, a gearhead converts high-rate, low-torque energy into low-speed, high-torque result. A servo electric motor provides extremely accurate 
positioning of its result shaft. When these two products are paired with one another, they promote each other’s strengths, offering controlled motion that’s precise, robust, and reliable.
Servo Gearboxes are robust! While there are high torque servos available that doesn’t mean they can compare to the strain capability of a Servo Gearbox. The tiny 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 look like suitable for the application. A servo gearbox isolates the strain to the gearbox result shaft which is backed by a pair 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.