As servo technology has evolved-with manufacturers producing smaller, yet more powerful motors -gearheads are becoming increasingly essential companions in motion control. Locating the ideal pairing must take into account many engineering considerations.
• A servo engine working 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 engine and will have a larger negative impact on motor functionality at lower rpms.
• An off-the-shelf motor’s parameters may not be ideally suited to run at a low rpm. When an application runs the aforementioned electric motor at 50 rpm, essentially it isn’t using most of its obtainable rpm. As the voltage continuous (V/Krpm) of the motor is set for a higher rpm, the torque constant (Nm/amp)-which is directly linked to it-is certainly lower than it requires 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 occasionally called gear reducers. Using 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 higher rpm will enable you to avoid the concerns
Servo Gearboxes provide freedom for just how much rotation is achieved from a servo. Many hobby servos are limited to just beyond 180 levels of rotation. Many of the Servo Gearboxes make use of 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 gear 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 latest advances in servo motor technology. Essentially, a gearhead converts high-quickness, low-torque energy into low-speed, high-torque result. A servo electric motor provides highly accurate positioning of its result shaft. When both of these devices are paired with one another, they promote each other’s strengths, offering controlled motion that is precise, robust, and dependable.
Servo Gearboxes are robust! While there are high torque servos out there that doesn’t mean they are able to compare to the strain capacity of a Servo Gearbox. The small splined output shaft of a normal servo isn’t lengthy enough, large enough or supported well enough to handle some loads despite the fact that the torque numbers appear to be suitable for the application. A servo gearbox isolates the strain to the gearbox result shaft which is supported 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 to the servo. Subsequently, the servo operates more freely and can transfer more torque to the result shaft of the gearbox.