With the many industrial gearboxes available today, it’s vital that you match the proper type of gearbox with the drive, motor, and load. When a machine requires a servosystem (drive and electric motor), the gearbox type is crucial for accurate and repeatable motion. Planetary gearboxes suit you perfectly for servo applications.
High-precision helical planetary gearboxes are an excellent choice for applications that require precision and reliability. Planetary gearboxes possess very low backlash ratings (typically ranging from someone to nine arc-min), so when sized correctly offer a service existence of over 20,000 hours with virtually no maintenance. Helical planetary gears also provide very quiet and more efficient operation when compared with competitive products.
Precision gearboxes are carefully machined to high tolerances – think clockmaker, not blacksmith. They provide power densities that translates to small package size and efficiencies of 90% and greater.
Servomotors often drive loads directly with no need for a gearbox, but in many applications it’s advantageous 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 less energy. Instead of buying relatively huge servodrives and motors, developer can use smaller elements, saving space and cash.
Output torque raises in direct proportion to the gear ratio, and top speed of the result 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 your reflected load inertia and motor inertia should be only practical, ideally under ten-to-one. A precision gearbox reduces the reflected inertia by the square of the decrease ratio. For instance, using a 25:1 gearbox reduces the load’s reflected inertia by one factor of 625, a significant improvement.