When 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 can be unevenly distributed over the planetary gears and the drive train operates less smoothly. Also, gear life could be shortened. These alignment changes require skills that are not normally available 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 usually integral with its shaft, which must be smaller as well, thereby reducing its strength and its torque or load capability.
Several types of gear trains, including those with planetary gears, are generally used to acquire this optimum reduction ratio. Planetary equipment trains offer high stiffness and low backlash (necessary for accurate operation), plus also load distribution (to acquire maximum torque). Some planetary versions combine external-tooth pinion-and-gear sets with planetary equipment sections to simplify set up and boost acceleration. These hybrid gearheads are referred to later.
A simple planetary gearhead has a few limitations regarding ease of installation, load capacity, and speed, all of which are related to the sun gear.
Generally, the designer usually obtains the maximum speed reduction ratio by 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, making it run more efficiently.
Servo motors deliver precise control of position, 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 direction and servo reducer rotation distance.
Cone Drive’s stainless steel precision motion gearboxes are designed for sterile manufacturing environments. The product’s smooth surface and curved contour permits easy cleaning and bacteria-free surfaces, ideal 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 wanting to reduce the electric motor size by utilizing a gearbox to reduce speed and increase torque. Speed reduction allows fast acceleration and deceleration of large loads using a small, less costly motor.