Whenever a conventional planetary gearhead is mounted to a motor, 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 can be shortened. These alignment adjustments require skills that aren’t normally obtainable in the field.
Achieving a more substantial speed reduction ratio requires a smaller sun gear diameter (or an exceptionally large ring equipment). 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 obtain this optimum reduction ratio. Planetary gear trains offer high stiffness and low backlash (needed for accurate operation), plus actually load distribution (to obtain optimum torque). Some planetary variations combine external-tooth pinion-and-gear units with planetary gear sections to simplify set up and boost rate. These hybrid gearheads are described later.
A basic planetary gearhead has several limitations regarding ease of installation, load capacity, and speed, all of which are related to the sun gear.
Generally, the designer usually obtains the the best speed decrease ratio by matching the inertia of the motor and gearbox with the inertia of the driven load. This inertia complementing 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 require a servo drive – this uses the opinions data to exactly control the position of the motors path and rotation distance.
Cone Drive’s stainless precision motion gearboxes are made for sterile manufacturing conditions. The product’s smooth surface and curved contour allows for easy cleaning and bacteria-free surfaces, ideal for meals digesting and pharmaceutical applications. The product is designed and ranked to IP69k providing maximum safety against contaminant ingress in addition to leak free operation.
Servomotor selection usually starts with the designer wanting to reduce the engine size by utilizing a gearbox to reduce speed and enhance torque. Speed decrease allows speedy acceleration and deceleration of large loads using a small, less expensive motor.
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