As servo technology has evolved-with manufacturers producing smaller, yet more powerful motors -gearheads are becoming increasingly essential partners in motion control. Finding the ideal pairing must take into account many engineering considerations.
• A servo engine 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 actually produce a drag push within the engine and will have a larger negative impact on motor performance at lower rpms.
• An off-the-shelf motor’s parameters might not be ideally suitable for 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. Because the voltage constant (V/Krpm) of the motor is set for a higher rpm, the torque constant (Nm/amp)-which is directly related to it-can be lower than it needs to be. As a result, the application needs more current to drive it than if the application had a motor specifically created for 50 rpm. A gearhead’s ratio reduces the motor rpm, which explains why gearheads are occasionally 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 allow you to avoid the concerns
Servo Gearboxes provide freedom for just how much rotation is achieved from a servo. The majority of hobby servos are limited by just beyond 180 examples of rotation. Most of the Servo Gearboxes utilize a patented exterior potentiometer so 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 essential to drive the potentiometer (and therefore the gearbox output shaft) into the position that the signal from the servo controller demands.
Machine designers are increasingly embracing gearheads to take benefit of the latest advances in servo motor technology. Essentially, a gearhead converts high-acceleration, low-torque energy into low-speed, high-torque result. A servo engine provides extremely accurate positioning of its output shaft. When these two 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 available that doesn’t suggest they are able to compare to the load capability of a Servo Gearbox. The tiny splined result shaft of a regular servo isn’t long enough, huge enough or supported sufficiently to handle some loads despite the fact that the torque numbers look like suitable for the application form. A servo gearbox isolates the load to the gearbox output shaft which is supported by a set of ABEC-5 precision ball bearings. The exterior shaft can withstand severe loads in the axial and radial directions without transferring those forces on to the servo. Subsequently, the servo operates more freely and is able to transfer more torque to the result shaft of the gearbox.