The Beauty of Planetary Gearbox For Servo Motor

Posted on Nov 26, 2020

Planetary gearbox for servo motor

The planetary gearbox for servo motor gearboxes provides motorized systems of torque multiplication, speed reduction and inertia matching. In particular, servo systems need gearboxes that can not only provide high torque with no extra inertia, but also high accuracy and rigidity.

All of these conditions are fulfilled by one form of gearbox, thus maintaining a very long life with minimal maintenance: planetary gear. A wide range of gears fitted with an adapter and a backlash-free clutch for mounting to any form of servo motor are composed of servo gears.

Both gearboxes are fitted with helical gears and are distinguished by high precision, high performance and high rigidity of torsion. Typical applications of geared motors:

•    Packaging machines
•    Handling systems
•    Tool machines
•    Assembly machines
•    Printing machines
 

:: Read more : Why a Right Angle Servo Gearbox Is a Great Choice

Planetary Gearbox for Servo Motor Construction

The planetary gear is made up of a multitude of planetary gears revolving around the central gear of the sun, mating with the inner gear and rotating around its own axes. Continuous engagement of the planetary gears ensures that several teeth share the load, allowing the planetary designs to bear heavy loads of torque.

For quiet operation and a long service life, some planetary gears have a sturdy configuration with grounded spur gears. With common transmission styles, the main series is dimensionally compatible. They are built to operate with practically any servo motor fast coupler, are available with minimal lead times, and are priced to provide outstanding value.

The precise manufacture of the planetary gear for the servo motor allows for a low backlash not only for several hundred hours, but throughout the life of the gear. The precision planetary gear units of the usual series are designed for direct mounting on servo motors and are characterized by a very high power density and low torsional backlash.

The high efficiency makes these gearboxes ideal for continuous S1 operation and thus for use, for example, in printing machines. In combination with dynamic servo motors, they achieve the highest speeds, accelerations and optimal positioning accuracy. Single or two-stage gearboxes can be supplied with an optional smooth shaft or key, and with reduced torsional backlash if required.
 

Load Sharing Explained

This load sharing between the teeth also provides the planetary gear with high torsional stiffness, making it ideal for processes with frequent start-stop movements or reversal of direction, which are typical features of servo applications.

Many servo systems often need very precise alignment, and planetary gears, often as little as 1-2 minutes of arc, are designed and manufactured to provide a low backlash. It is possible to use helical or helical gears in planetary gears. The spur gears may have higher torque values than the spur gears, however. Although helical gears may have higher torque values than helical gears, helical gears have a smoother operation, lower noise and higher rigidity, making helical planetary gears the chosen servo gearbox.

When a gearbox is attached to the driveline, the rotational velocity provided to the driver by the motor is decreased by the sum of the gear, which can allow the machine to make greater use of the servo motor's rotational velocity features. Planetary gears are able to accept very high input speeds and provide a speed reduction of up to 10: 1 with standard designs, with high-speed designs providing gear ratios 100:1 (and thus speed reduction) or higher. They may also be lubricated with grease or oil, but a planetary gear is sometimes lubricated with grease for use with a servo (sometimes called a "servo" or a "servo" gear).

Planetary gearboxes are mostly lubricated by the manufacturer for the life of the gearbox with either case-grease or oil lubrication-, which reduces upkeep for the end-user. Its effect on the friction of the load is perhaps the most significant benefit of using the gearbox in the servo system. The load inertia, expressed in the engine, is reduced to the square of the gear ratio. Although a relatively minor downshift will, however, have a substantial effect on the coefficient of inertia.
 

Servopositioning Applications

There are normally two reasons why one would turn to gear reducers in servo-positioning applications. First of all, More torque and less speed are generally the premises for many applications rather than from a servo-motor alone. A gear reducer trades top-end speed for higher output torque, though the speed may or may not be required. Servo motors generally operate at 3000 to 5000 rpm and are very compact. But this is subject to change when they are configured to operate at higher speed for specialized applications.

Second of all, a servo-controlled system performs optimally when load inertia and motor inertia are similar. If the load inertia is too high compared with the motor-armature inertia, settling-time delays can occur sometimes. And this is where gear reducers come in. Gear reducers solve this problem by reducing reflect inertia – the load inertia seen by the control system – by the square of the gear reduction ratio. For instance, a 5:1 reduction ratio gives a 25:1 reduction in the reflected load-inertia ratio, permitting stable operation and exceptional machine performance.
 

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