As servo technology has evolved-with manufacturers creating smaller, yet better motors -gearheads are becoming increasingly essential companions in motion control. Finding the optimum pairing must consider many engineering considerations.
• A servo engine working at low rpm operates inefficiently. Eddy currents are loops of electrical current that are induced within the electric motor during operation. The eddy currents actually produce a drag power within the motor and will have a larger negative impact on motor overall performance at lower rpms.
• An off-the-shelf motor’s parameters might not be ideally suitable for run at a low rpm. When a credit card applicatoin runs the aforementioned engine at 50 rpm, essentially it isn’t using all of its offered rpm. Because the voltage continuous (V/Krpm) of the motor is set for an increased rpm, the torque continuous (Nm/amp)-which can be directly linked to it-is lower than it needs to be. Consequently, the application needs more current to drive it than if the application form had a motor specifically designed 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 engine 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 by just beyond 180 degrees of rotation. Most of the Servo Gearboxes use a patented external potentiometer so that the rotation amount is in addition to the gear ratio installed on the Servo Gearbox. In such case, the small equipment 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 signal from the servo controller demands.
Machine designers are increasingly turning to gearheads to take benefit of the most recent advances in servo engine technology. Essentially, a gearhead converts high-velocity, low-torque energy into low-speed, high-torque result. A servo engine provides highly accurate positioning of its result shaft. When both of these products are paired with one another, they enhance each other’s strengths, providing controlled motion that’s precise, robust, and dependable.
Servo Gearboxes are robust! While there are high torque servos out there that doesn’t mean they can compare to the load capacity of a Servo Gearbox. The tiny splined result shaft of a normal servo isn’t long enough, huge enough or supported sufficiently to handle some loads despite the fact that the torque numbers appear to be appropriate for the application. A servo gearbox isolates the load to the gearbox output shaft which is backed by a pair of ABEC-5 precision ball bearings. The external shaft can withstand extreme loads in the axial and radial directions without transferring those forces on to the servo. In turn, the servo operates more freely and is able to transfer more torque to the result shaft of the gearbox.
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