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 take into account many engineering considerations.
• A servo motor running 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 functionality at lower rpms.
• An off-the-shelf motor’s parameters might not be ideally suited to run at a low rpm. When an application runs the aforementioned motor at 50 rpm, essentially it isn’t using most of its obtainable rpm. Because the voltage continuous (V/Krpm) of the electric motor is set for an increased rpm, the torque constant (Nm/amp)-which can be directly linked to it-is lower than it needs to be. Because of this, the application requirements more current to drive it than if the application form had a motor specifically made for 50 rpm. A gearhead’s ratio reduces the engine rpm, which explains 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 electric motor at the higher 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 degrees of rotation. Most of the Servo Gearboxes utilize a patented exterior potentiometer so that the rotation quantity is independent of the gear ratio installed on the Servo Gearbox. In such case, the small equipment on the servo will rotate as many times as essential 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 turning to gearheads to take benefit of the most recent advances in servo engine technology. Essentially, a gearhead converts high-rate, low-torque energy into low-speed, high-torque output. A servo electric motor provides highly accurate positioning of its result shaft. When these two products are paired with each other, they enhance each other’s strengths, providing controlled motion that is precise, robust, and dependable.
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 regular servo isn’t long enough, huge enough or supported sufficiently to handle some loads despite the fact that 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 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. Subsequently, the servo runs more freely and is able to transfer more torque to the output shaft of the gearbox.
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