As servo technology has evolved-with manufacturers generating smaller, yet better motors -gearheads have become increasingly essential companions in motion control. Finding the ideal pairing must take into account many engineering considerations.
• A servo motor operating at low rpm operates inefficiently. Eddy currents are loops of electric current that are induced within the electric 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 overall performance at lower rpms.
• An off-the-shelf motor’s parameters may not be ideally suitable for run at a minimal rpm. When a credit card applicatoin runs the aforementioned engine at 50 rpm, essentially it is not using all of its obtainable rpm. Because the voltage constant (V/Krpm) of the engine is set for a higher rpm, the torque constant (Nm/amp)-which is usually directly linked to it-is certainly lower than it needs to be. Consequently, the application requirements more current to drive it than if the application form had a motor specifically made for 50 rpm. A gearhead’s ratio reduces the motor rpm, which explains why gearheads are sometimes called gear reducers. Using 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 engine at the higher rpm will permit 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 levels of rotation. Most of the Servo Gearboxes use a patented external potentiometer so that the rotation quantity is in addition to the equipment ratio installed on the Servo Gearbox. In such case, the small gear on the servo will rotate as many times as necessary 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 advantage of the latest advances in servo motor technology. Essentially, a gearhead converts high-speed, low-torque energy into low-speed, high-torque result. A servo motor provides extremely accurate positioning of its result shaft. When these two devices are paired with one another, they enhance each other’s strengths, providing controlled motion that is precise, robust, and dependable.
Servo Gearboxes are robust! While there are high torque servos on the market that doesn’t suggest they are able to compare to the strain capability 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 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 external shaft can withstand intense loads in the axial and radial directions without transferring those forces on to the servo. Subsequently, the servo runs more freely and can transfer more torque to the result shaft of the gearbox.