As servo technology has evolved-with manufacturers making smaller, yet more powerful motors -gearheads have become increasingly essential partners in motion control. Locating the ideal pairing must consider many engineering considerations.
• A servo engine running at low rpm operates inefficiently. Eddy currents are loops of electrical current that are induced within the engine during operation. The eddy currents actually produce a drag drive within the motor and will have a greater negative effect 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 all of its offered rpm. As the voltage constant (V/Krpm) of the motor is set for an increased rpm, the torque constant (Nm/amp)-which is usually directly linked to it-is definitely lower than it needs to be. Consequently, the application requirements more current to operate a vehicle it than if the application had a motor particularly made for 50 rpm. A gearhead’s ratio reduces the engine rpm, which explains why gearheads are sometimes called gear reducers. Utilizing 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 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 degrees of rotation. Many of the Servo Gearboxes use a patented exterior potentiometer to ensure that the rotation amount is independent of the gear ratio installed on the Servo Gearbox. In this kind of case, the small equipment 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 demands.
Machine designers are increasingly embracing gearheads to take advantage of the latest advances in servo electric motor technology. Essentially, a gearhead converts high-quickness, low-torque energy into low-speed, high-torque output. A servo motor provides highly accurate positioning of its result shaft. When these two gadgets are paired with each other, they promote each other’s strengths, providing controlled motion that’s precise, robust, and reliable.
Servo Gearboxes are robust! While there are high torque servos in the marketplace that doesn’t imply they are able to 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 take care of some loads even though the torque numbers appear to be appropriate for the application. A servo gearbox isolates the load to the gearbox result shaft which is backed by a set 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. In turn, the servo runs more freely and is able to transfer more torque to the result shaft of the gearbox.