As servo technology has evolved-with manufacturers producing smaller, yet more powerful motors -gearheads have become increasingly essential companions in motion control. Locating the ideal pairing must consider 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 motor during operation. The eddy currents in fact produce a drag drive within the electric motor and will have a greater negative impact on motor performance 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 engine at 50 rpm, essentially it is not 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-can be lower than it needs to be. Consequently, the application needs more current to drive it than if the application had a motor specifically designed for 50 rpm. A gearhead’s ratio reduces the engine rpm, which is why gearheads are sometimes called gear reducers. Utilizing 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 higher rpm will enable 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 to just beyond 180 examples of rotation. Many of the Servo Gearboxes use a patented exterior potentiometer so that the rotation quantity is in addition to the equipment ratio installed on the Servo Gearbox. In this kind of case, the small gear on the servo will rotate as many times as necessary to drive the potentiometer (and hence the servo motor gearbox Gearbox output shaft) into the placement that the transmission from the servo controller demands.
Machine designers are increasingly turning to gearheads to take advantage of the most recent advances in servo electric motor technology. Essentially, a gearhead converts high-acceleration, low-torque energy into low-speed, high-torque output. A servo engine provides highly accurate positioning of its output shaft. When both of these gadgets 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 in the marketplace that doesn’t mean they can compare to the strain capacity of a Servo Gearbox. The small splined output shaft of a regular servo isn’t lengthy enough, large enough or supported sufficiently to handle some loads even though the torque numbers seem to be appropriate for the application. A servo gearbox isolates the strain to the gearbox output shaft which is supported by a set of ABEC-5 precision ball bearings. The exterior 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 output shaft of the gearbox.