As servo technology has evolved-with manufacturers making smaller, yet better motors -gearheads are becoming increasingly essential partners in motion control. Finding the optimal pairing must take into account many engineering considerations.
• A servo electric motor running at low rpm operates inefficiently. Eddy currents are loops of electrical current that are induced within the engine during procedure. The eddy currents in fact produce a drag force within the engine and will have a larger negative effect on motor functionality at lower rpms.
• An off-the-shelf motor’s parameters might not be ideally suited to run at a minimal rpm. When an application runs the aforementioned electric motor at 50 rpm, essentially it isn’t using all of its available rpm. As the voltage continuous (V/Krpm) of the engine is set for an increased rpm, the torque constant (Nm/amp)-which is directly linked to it-is definitely lower than it requires to be. Because of this, the application requirements more current to operate a vehicle it than if the application had a motor specifically created for 50 rpm. A gearhead’s ratio reduces the motor rpm, which is why gearheads are sometimes 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 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. Most of the Servo Gearboxes utilize a patented external potentiometer so that the rotation amount is independent of the equipment ratio installed 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 signal from the servo controller demands.
Machine designers are increasingly turning to gearheads to take benefit of the most recent advances in servo motor technology. Essentially, a gearhead converts high-speed, low-torque energy into low-speed, high-torque output. A servo motor provides highly accurate positioning of its output shaft. When both of these devices are paired with one another, they enhance each other’s strengths, providing controlled motion that’s precise, robust, and dependable.
Servo Gearboxes are robust! While there are high torque servos in the marketplace that doesn’t mean they can compare to the load capacity of a Servo Gearbox. The tiny 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 seem to be appropriate for the application. A servo gearbox isolates the load to the gearbox output 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 on to the servo. In turn, the servo operates more freely and is able to transfer more torque to the result shaft of the gearbox.
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