Whenever a conventional planetary gearhead is mounted to a electric motor, the sun gear should 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 easily. Also, gear life can be shortened. These alignment modifications require skills that are not normally obtainable in the field.
Achieving a more substantial speed reduction ratio takes a smaller sun equipment diameter (or an exceptionally large ring equipment). This smaller sun gear is usually integral with its shaft, which should be smaller aswell, 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 acquire this the best possible reduction ratio. Planetary gear trains offer high stiffness and low backlash (needed for accurate operation), plus even load distribution (to obtain maximum torque). Some planetary versions combine external-tooth pinion-and-gear sets with planetary gear sections to simplify set up and boost swiftness. These hybrid gearheads are explained later.
A basic planetary gearhead has several 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 servo motor and gearbox matching the inertia of the electric motor and gearbox with the inertia of the driven load. This inertia coordinating 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 precisely control the position of the motors direction and rotation distance.
Cone Drive’s stainless precision motion gearboxes are designed for sterile manufacturing environments. 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 rated to IP69k providing maximum protection against contaminant ingress along with leak free operation.
Servomotor selection usually starts with the designer wanting to reduce the electric motor size by utilizing a gearbox to lessen speed and boost torque. Speed decrease allows quick acceleration and deceleration of huge loads using a small, less expensive motor.