As servo technology has evolved-with manufacturers creating smaller, yet better motors -gearheads are becoming increasingly essential partners in motion control. Locating the optimal pairing must take into account many engineering considerations.
• A servo engine operating at low rpm operates inefficiently. Eddy currents are loops of electrical current that are induced within the motor during operation. The eddy currents actually produce a drag push within the electric motor and will have a larger negative effect on motor functionality at lower rpms.
• An off-the-shelf motor’s parameters may not be ideally suitable for run at a low rpm. When a credit card applicatoin runs the aforementioned motor at 50 rpm, essentially it is not using all of its obtainable rpm. Because the voltage continuous (V/Krpm) of the engine is set for an increased rpm, the torque continuous (Nm/amp)-which can be directly related to it-is usually lower than it needs to be. Because of this, the application requirements more current to operate a vehicle it than if the application had a motor specifically created for 50 rpm. A gearhead’s ratio reduces the electric 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 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 degrees of rotation. Many of the Servo Gearboxes use 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 output shaft) into the position that the transmission from the servo controller calls for.
Machine designers are increasingly embracing gearheads to take advantage of the latest advances in servo electric motor technology. Essentially, a gearhead converts high-velocity, low-torque energy into low-speed, high-torque output. A servo motor provides extremely accurate positioning of its output shaft. When these two devices are paired with each other, they enhance each other’s strengths, offering controlled motion that is precise, robust, and dependable.
Servo Gearboxes are robust! While there are high torque servos on the market that doesn’t indicate they can compare to the strain capacity of a Servo Gearbox. The small splined result shaft of a normal servo isn’t long enough, huge enough or supported sufficiently to handle some loads even though the torque numbers seem to be appropriate for the application form. 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 to the servo. Subsequently, the servo operates more freely and is able to transfer more torque to the result shaft of the gearbox.