As servo technology has evolved-with manufacturers creating smaller, yet better motors 
-gearheads have become increasingly essential companions in motion control. Finding the ideal pairing must take into account many engineering considerations.
• A servo engine operating at low rpm operates inefficiently. Eddy currents are loops of electrical current that are induced within the motor during operation. The eddy currents in fact produce a drag force within the motor and will have a greater negative impact on motor efficiency at lower rpms.
• An off-the-shelf motor’s parameters may not be ideally suitable for run at a low rpm. When a credit card applicatoin runs the aforementioned electric motor at 50 rpm, essentially it is not using all of its offered rpm. Because the voltage constant (V/Krpm) of the engine is set for an increased rpm, the torque constant (Nm/amp)-which is definitely directly related to it-is lower than it requires to be. Because of this, the application requirements more current to drive it than if the application had a motor specifically designed for 50 rpm. A gearhead’s ratio reduces the motor rpm, which explains 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 electric motor at the bigger rpm will allow 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 use a patented external potentiometer so that the rotation quantity is in addition to the gear ratio installed on the Servo Gearbox. In such case, the small gear on the servo will rotate as many times as necessary to drive the potentiometer (and therefore the gearbox result shaft) into the position that the transmission from the servo controller demands.
Machine designers are increasingly embracing gearheads to take advantage of the latest advances in servo motor technology. Essentially, a gearhead converts high-speed, low-torque energy into low-speed, high-torque result. A servo electric motor provides extremely accurate positioning of its output shaft. When these two devices are paired with each other, they enhance each other’s strengths, providing controlled motion that is precise, robust, and reliable.
Servo Gearboxes are robust! While there are high torque servos available that doesn’t imply they can compare to the load capacity of a Servo Gearbox. The tiny splined result shaft of a normal servo isn’t long enough, large enough or supported well enough to handle some loads even though the torque numbers seem to be suitable for the application. A servo gearbox isolates the load to the gearbox result shaft which is backed 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. In turn, the servo operates more freely and can transfer more torque to the result shaft of the gearbox.