With the many industrial gearboxes available today, it’s important to match the proper kind of gearbox with the drive, motor, and load. When a machine requires a servosystem (drive and motor), the gearbox type is critical for accurate and repeatable motion. Planetary gearboxes fit the bill for servo applications.
High-precision helical planetary gearboxes are an excellent choice for applications that need precision and reliability. Planetary gearboxes have got very low backlash rankings (typically ranging from one to nine arc-min), so when sized correctly provide a service lifestyle of over 20,000 hours with virtually no maintenance. Helical planetary gears also provide very tranquil and more efficient operation in comparison with competitive products.
Precision gearboxes are carefully machined to high tolerances – think clockmaker, not blacksmith. They provide power densities that means small bundle size and efficiencies of 90% and greater.
Servomotors often drive loads directly without the need for a gearbox, but in many applications it’s beneficial to use a gearbox between your motor and load.
One main reason to employ a gearbox is torque multiplication. It lets designers make use of smaller servosystems that consumes much less energy. Rather than buying relatively large servodrives and motors, developer can use smaller parts, saving space and money.
Output torque increases in direct proportion to the gear ratio, and top velocity of the output shaft decreases. If an application can withstand the reduced speed, a relatively small servosystem can supply high torque.
Gearboxes may also address inertia mismatches. For powerful servosystems — those with high powerful responses or low overshoot, for instance – the ratio between the reflected load inertia and engine inertia should be as low as practical, ideally under ten-to-one. A precision gearbox reduces the reflected inertia by the square of the reduction ratio. For instance, utilizing a 25:1 gearbox reduces the load’s reflected inertia by a factor of 625, a significant improvement.