Whenever 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 can be unevenly distributed over the planetary gears and the drive teach operates less smoothly. Also, gear life could be shortened. These alignment changes require skills that are not normally obtainable 
in the field.
Achieving a more substantial speed reduction ratio requires a smaller sun equipment diameter (or an exceptionally large ring gear). This smaller sun gear is servo reducer usually integral with its shaft, which should be smaller aswell, thereby reducing its power and its torque or load capability.
Several types of gear trains, including people that have planetary gears, are commonly used to acquire this optimum reduction ratio. Planetary equipment trains provide high stiffness and low backlash (necessary for accurate operation), plus actually load distribution (to acquire optimum torque). Some planetary variations combine external-tooth pinion-and-gear sets with planetary gear sections to simplify installation and boost rate. These hybrid gearheads are explained later.
A simple planetary gearhead has some limitations regarding ease of installation, load capacity, and speed, which are related to the sun gear.
As a rule, the designer usually obtains the the best speed reduction ratio by matching the inertia of the engine and gearbox with the inertia of the driven load. This inertia coordinating minimizes power reduction 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 feedback data to exactly control the position of the motors path and rotation distance.
Cone Drive’s stainless precision movement gearboxes are made for sterile manufacturing conditions. The product’s smooth surface area and curved contour allows for easy cleaning and bacteria-free surfaces, ideal for food digesting and pharmaceutical applications. The product is designed and ranked to IP69k offering maximum security against contaminant ingress along with leak free operation.
Servomotor selection usually begins with the designer wanting to reduce the motor size by utilizing a gearbox to lessen speed and enhance torque. Speed reduction allows speedy acceleration and deceleration of huge loads utilizing a small, less costly motor.