As servo technology has evolved-with manufacturers generating smaller, yet better motors -gearheads have become increasingly essential partners in motion control. Locating the optimum pairing must take into account many engineering considerations.
• A servo electric motor operating at low rpm operates inefficiently. Eddy currents are loops of electrical current that are induced within the engine during operation. The eddy currents in fact produce a drag pressure within the engine and will have a larger negative effect on motor overall performance 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 motor at 50 rpm, essentially it isn’t using all of its offered rpm. As the voltage continuous (V/Krpm) of the engine is set for an increased rpm, the torque continuous (Nm/amp)-which is usually 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 form had a motor particularly designed for 50 rpm. A gearhead’s ratio reduces the electric motor rpm, which is why gearheads are occasionally called gear reducers. Using 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 bigger rpm will enable you to avoid the concerns
Servo Gearboxes provide freedom for just how much rotation is achieved from a servo. Most hobby servos are limited to just beyond 180 examples of rotation. Most of the Servo Gearboxes make use of a patented external potentiometer to ensure that the rotation quantity is in addition to the gear ratio set up on the Servo Gearbox. In this kind of case, the small gear on the servo will rotate as much times as necessary to drive the potentiometer (and hence the gearbox output shaft) into the position that the signal from the servo controller calls for.
Machine designers are increasingly turning to gearheads to take advantage 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 engine provides highly accurate positioning of its output shaft. When both of these devices are paired with each other, 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 suggest they are able to compare to the load capacity of a Servo Gearbox. The tiny splined result shaft of a regular servo isn’t lengthy enough, large enough or supported sufficiently to take care of some loads even though the torque numbers look like appropriate for the application. A servo gearbox isolates the strain to the gearbox output shaft which is supported by a pair of ABEC-5 precision ball bearings. The exterior shaft can withstand extreme loads in the axial and radial directions without transferring those forces on to the servo. In turn, the servo runs more freely and can transfer more torque to the output shaft of the gearbox.