As servo technology has evolved-with manufacturers producing smaller, yet better motors -gearheads have become increasingly essential companions in motion control. Finding the optimum pairing must consider many engineering considerations.
• A servo engine running 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 a credit card applicatoin 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 usually directly related to it-is definitely lower than it requires to be. Consequently, 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. Using a gearhead with a 40:1 ratio,
the 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 motor at the higher rpm will permit 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 degrees of rotation. Most of the Servo Gearboxes use a patented external potentiometer to ensure that the rotation amount is independent of the equipment ratio set up on the Servo Gearbox. In such case, the small equipment on the servo will rotate as many times as necessary to drive the potentiometer (and therefore the gearbox output shaft) into the position that the transmission from the servo controller calls for.
Machine designers are increasingly embracing gearheads to take advantage of the latest advances in servo electric motor technology. Essentially, a gearhead converts high-rate, low-torque energy into low-speed, high-torque result. A servo engine 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 is precise, robust, and reliable.
Servo Gearboxes are robust! While there are high torque servos on the market that doesn’t indicate they can compare to the load capability of a Servo Gearbox. The small splined result shaft of a normal servo isn’t lengthy enough, large enough or supported sufficiently to handle some loads even though the torque numbers seem to be 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 severe loads in the axial and radial directions without transferring those forces on to the servo. Subsequently, the servo operates more freely and can transfer more torque to the result shaft of the gearbox.