When a conventional planetary gearhead is mounted to a electric motor, the sun gear must be aligned to pay for runout error of the servomotor shaft. Without proper alignment, load is usually unevenly distributed over the planetary gears and the drive teach operates less smoothly. Also, gear life can be shortened. These alignment adjustments require skills that are not normally available in the field.
Achieving a more substantial speed reduction ratio takes a smaller sun equipment diameter (or an exceedingly large ring equipment). This smaller sun gear is usually integral with its shaft, which must be smaller aswell, thereby reducing its power and its own torque or load capacity.
Various kinds 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 (necessary for accurate operation), plus also load distribution (to acquire maximum torque). Some planetary variations combine external-tooth pinion-and-gear sets with planetary gear sections to simplify installation and boost velocity. These hybrid gearheads are explained later.
A simple planetary gearhead has some 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 the best possible speed decrease ratio by matching the inertia of the engine and gearbox with the inertia of the driven load. This inertia matching minimizes power loss in the motor, which makes 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 position of the motors direction and rotation distance.
Cone Drive’s stainless precision motion gearboxes are made for sterile manufacturing environments. The product’s smooth servo reducer surface and curved contour allows for easy cleaning and bacteria-free surfaces, perfect for meals processing and pharmaceutical applications. The product is designed and ranked to IP69k offering maximum protection against contaminant ingress and also leak free operation.
Servomotor selection usually starts with the designer wanting to reduce the electric motor size by using a gearbox to reduce speed and increase torque. Speed reduction allows quick acceleration and deceleration of huge loads using a small, less costly motor.