When a conventional planetary gearhead is mounted to a engine, the sun gear must be aligned to pay for runout error of the servomotor shaft. Without proper alignment, load is unevenly distributed over the planetary gears and the drive teach operates less smoothly. Also, gear life could be shortened. These alignment adjustments require skills that are not normally available in the field.
Achieving a larger speed reduction ratio takes a smaller sun gear diameter (or an exceedingly large ring equipment). This smaller sun gear is usually integral with its shaft, which should be smaller as well, thereby reducing its strength and its own torque or load capability.
Various kinds gear trains, including those with planetary gears, are commonly used to acquire this the best reduction ratio. Planetary equipment trains provide high stiffness and low backlash (needed for accurate procedure), plus also load distribution (to obtain maximum torque). Some planetary variations combine external-tooth pinion-and-gear units with planetary gear sections to simplify set up and boost speed. These hybrid gearheads are described later.
A simple planetary gearhead has some servo motor and gearbox limitations regarding simple installation, load capacity, and speed, all of which are related to the sun gear.
Generally, the designer usually obtains the ideal speed reduction ratio by matching the inertia of the motor and gearbox with the inertia of the driven load. This inertia matching minimizes power loss in the motor, making it run more efficiently.
Servo motors deliver precise control of placement, velocity, and acceleration in the closed-loop systems of servomechanisms. Servo motors need a servo drive – this uses the opinions data to precisely control the position of the motors path and rotation distance.
Cone Drive’s stainless precision movement gearboxes are designed for sterile manufacturing conditions. The product’s smooth surface and curved contour permits easy cleaning and bacteria-free surfaces, perfect for food digesting and pharmaceutical applications. The merchandise is designed and ranked to IP69k providing maximum protection against contaminant ingress and also leak free operation.
Servomotor selection usually begins with the designer seeking to reduce the motor size by utilizing a gearbox to reduce speed and enhance torque. Speed reduction allows speedy acceleration and deceleration of 
large loads using a small, less costly motor.