With the many commercial gearboxes on the market, it’s vital that you match the proper kind of gearbox with the drive, motor, and load. When a machine needs a servosystem (drive and engine), the gearbox type is crucial for accurate and repeatable movement. 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 very low backlash ratings (typically ranging from one to nine arc-min), so when sized correctly offer a service lifestyle of over 20,000 hours with practically no maintenance. Helical planetary gears also provide very tranquil and more efficient operation as compared to competitive products.
Precision gearboxes are carefully machined to high tolerances – think clockmaker, not blacksmith. They offer 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 make use of a gearbox between the motor and load.
One main reason to employ a gearbox is torque multiplication. It lets designers use smaller servosystems that consumes less energy. Rather than buying relatively huge servodrives and motors, developer can use smaller components, saving space and money.
Output torque raises in direct proportion to the apparatus ratio, and top speed of the output shaft decreases. If an application can withstand the decreased speed, a relatively small servosystem can supply high torque.
Gearboxes can also address inertia mismatches. For high performance servosystems — people that have high powerful responses or low overshoot, for instance – the ratio between the reflected load inertia and motor inertia should be as low as practical, ideally under ten-to-one. A precision gearbox reduces the reflected inertia by the sq . of the decrease ratio. For instance, utilizing a 25:1 gearbox decreases the load’s reflected inertia by a factor of 625, a substantial improvement.