As servo technology has evolved-with manufacturers creating smaller, yet better motors -gearheads are becoming increasingly essential partners in motion control. Locating the optimum pairing must take into account many engineering considerations.
• A servo electric motor running at low rpm operates inefficiently. Eddy currents are loops of electric current that are induced within the motor during procedure. The eddy currents actually produce a drag push within the electric motor and will have a larger negative effect on motor efficiency at lower rpms.
• An off-the-shelf motor’s parameters may not be ideally suitable for run at a minimal rpm. When an application runs the aforementioned motor at 50 rpm, essentially it is not using most of its offered rpm. Because the voltage constant (V/Krpm) of the motor is set for an increased rpm, the servo motor gearbox torque continuous (Nm/amp)-which is directly related to it-is certainly lower than it requires to be. As a result, the application needs more current to drive it than if the application form had a motor particularly made for 50 rpm. A gearhead’s ratio reduces the electric motor rpm, which explains why gearheads are occasionally called gear reducers. Utilizing 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 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 by just beyond 180 degrees of rotation. Most of the Servo Gearboxes utilize a patented external potentiometer to ensure that the rotation quantity is in addition to the gear 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 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 motor technology. Essentially, a gearhead converts high-acceleration, low-torque energy into low-speed, high-torque output. A servo electric motor provides highly accurate positioning of its output shaft. When these two products are paired with one another, they enhance each other’s strengths, providing controlled motion that’s precise, robust, and reliable.
Servo Gearboxes are robust! While there are high torque servos on the market that doesn’t indicate they can compare to the strain capability of a Servo Gearbox. The small splined output shaft of a regular servo isn’t long enough, large enough or supported sufficiently to handle some loads even though the torque numbers appear to be suitable for the application form. A servo gearbox isolates the strain to the gearbox output shaft which is backed 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. In turn, the servo operates more freely and can transfer more torque to the result shaft of the gearbox.