Whenever a conventional planetary gearhead is mounted to a engine, the sun gear should be aligned to pay for runout error of the servomotor shaft. Without proper alignment, load is certainly unevenly distributed over the planetary gears and the drive train operates less smoothly. Also, gear life could be shortened. These alignment modifications require skills that aren’t normally obtainable in the field.
Achieving a larger speed reduction ratio requires a smaller sun equipment diameter (or an exceptionally large ring gear). This smaller sun equipment is usually integral with its shaft, which must be smaller as well, thereby reducing its strength and its own torque or load capability.
Several types of gear trains, including those with planetary gears, are generally used to obtain this ideal reduction ratio. Planetary equipment trains provide high stiffness and low backlash (needed for accurate operation), plus even load distribution (to acquire maximum torque). Some planetary variations combine external-tooth pinion-and-gear pieces with planetary gear sections to simplify installation and boost rate. These hybrid gearheads are described later.
A basic planetary gearhead has a few limitations regarding ease of installation, load capacity, and speed, all of which are related to the sun gear.
As a rule, the designer usually obtains the maximum speed reduction ratio by matching the inertia of the engine and gearbox with the inertia of the driven load. This inertia 
complementing minimizes power reduction in the motor, which makes it run more efficiently.
Servo motors deliver precise control of placement, velocity, and acceleration in the closed-loop systems of servomechanisms. Servo motors require a servo drive – this uses the feedback data to exactly control the positioning of the motors path and rotation distance.
Cone Drive’s stainless steel precision motion gearboxes are designed for sterile manufacturing environments. The product’s smooth surface area and curved contour permits easy cleaning and bacteria-free surfaces, ideal for food processing and pharmaceutical applications. The product is designed and rated to IP69k providing maximum security against contaminant ingress along with leak free operation.
Servomotor selection usually starts with the designer seeking to reduce the electric motor size by servo motor and gearbox utilizing a gearbox to lessen speed and increase torque. Speed reduction allows speedy acceleration and deceleration of large loads utilizing a small, less expensive motor.