Low Backlash Planetary Gearbox
A low backlash planetary gearbox refers to a gear system in which one or more 'planet' gears rotate around a central 'sun' gear. Typically, a planet carrier is
driven by the input torque which rotates the planets around a fixed outer ring (sometimes referred to as the annulus). This in turn drives the sun
gear which then provides the output torque.
However there are examples of the other combinations, such as the sun gear being fixed and the ring providing output torque.