As servo technology has evolved-with manufacturers generating smaller, yet more powerful motors -gearheads are becoming increasingly essential companions in motion control. Locating the optimum pairing must consider many 
engineering considerations.
• A servo motor working at low rpm operates inefficiently. Eddy currents are loops of electric current that are induced within the electric motor during operation. The eddy currents in fact produce a drag push within the electric motor and will have a larger negative effect on motor functionality at lower rpms.
• An off-the-shelf motor’s parameters may not be ideally suitable for run at a low rpm. When an application runs the aforementioned electric motor at 50 rpm, essentially it isn’t using all of its offered rpm. As the voltage constant (V/Krpm) of the engine is set for an increased rpm, the torque constant (Nm/amp)-which can be directly related to it-is lower than it needs to be. Consequently, the application requirements more current to operate a vehicle it than if the application form had a motor particularly made for 50 rpm. A gearhead’s ratio reduces the motor rpm, which explains why gearheads are occasionally called gear reducers. Utilizing 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 bigger rpm will allow you to avoid the concerns
Servo Gearboxes provide freedom for how much rotation is achieved from a servo. Most hobby servos are limited to just beyond 180 levels of rotation. Most of the Servo Gearboxes utilize a patented external potentiometer to ensure that the rotation amount is in addition to the gear 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 hence the gearbox output shaft) into the position that the transmission from the servo controller calls for.
Machine designers are increasingly turning to gearheads to take benefit of the most recent advances in servo electric motor technology. Essentially, a gearhead converts high-speed, low-torque energy into low-speed, high-torque output. A servo engine provides extremely accurate positioning of its result shaft. When these two devices are paired with each other, they promote each other’s strengths, providing controlled motion that is precise, robust, and dependable.
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 small splined output shaft of a normal servo isn’t long enough, huge enough or supported well enough to take care of some loads even though the torque numbers appear to be appropriate for the application. A servo gearbox isolates the strain to the gearbox output shaft which is backed by a set 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 runs more freely and can transfer more torque to the result shaft of the gearbox.
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