As servo technology has evolved-with manufacturers producing smaller, yet more powerful motors -gearheads are becoming increasingly essential partners in motion control. Locating the optimal pairing must consider many engineering considerations.
• A servo motor operating at low rpm operates inefficiently. Eddy currents are loops of electrical current that are induced within the engine during procedure. The eddy currents in fact produce a drag power within the motor and will have a greater negative impact on motor performance at lower rpms.
• An off-the-shelf motor’s parameters may not be ideally suitable for run at a minimal rpm. When an servo motor gearbox application runs the aforementioned engine at 50 rpm, essentially it is not using most of its available rpm. Because the voltage constant (V/Krpm) of the motor is set for an increased rpm, the torque constant (Nm/amp)-which can be directly related to it-is usually lower than it needs to be. Consequently, the application needs more current to drive it than if the application had a motor particularly designed for 50 rpm. A gearhead’s ratio reduces the motor 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 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 by just beyond 180 levels of rotation. Many of the Servo Gearboxes utilize a patented external potentiometer to ensure that the rotation amount is independent of the gear ratio set up 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 hence the gearbox result shaft) into the placement that the signal from the servo controller demands.
Machine designers are increasingly turning to gearheads to take advantage of the latest advances in servo engine technology. Essentially, a gearhead converts high-speed, low-torque energy into low-speed, high-torque output. A servo motor provides extremely accurate positioning of its output shaft. When both of these products are paired with each other, they promote each other’s strengths, offering controlled motion that’s precise, robust, and reliable.
Servo Gearboxes are robust! While there are high torque servos available that doesn’t indicate they are able to compare to the load capacity of a Servo Gearbox. The tiny splined result shaft of a normal servo isn’t lengthy enough, large enough or supported well enough to take care of some loads despite the fact that the torque numbers look like suitable 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 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 output shaft of the gearbox.