What is the difference between a lifting splitter and a servo motor?
Publish Time:
2023-01-18 09:14
Source:
Everyone in the automation industry knows that indexing dividers achieve intermittent motion at fixed workstations, while servo motors can achieve positioning at any workstation based on actual usage needs. So, why do engineers prefer indexing dividers? To understand this, we need to clarify the differences between dividers and servo motors, as well as their respective advantages and disadvantages.
An indexing divider is a high-precision rotary positioning device with high rotary repeatability. Its structure includes an input shaft, cam, needle roller bearing, output turntable, housing, etc. The working principle is that under the action of the drive source, the input cam mechanism drives the output turntable to achieve indexing motion. Because the surface of the cam structure is mainly a complex sinusoidal processing surface, when it contacts the roller cam of the turntable, it realizes the mechanical action of movement and stop. Therefore, the intermittent motion realized by the divider is completely mechanically completed, and its stability is superior to any other non-mechanical device.
A servo motor is an engine that controls the operation of mechanical components in a servo system. It is an indirect speed changer for auxiliary motors. Servo motors can precisely control speed and position, and can convert voltage signals into torque and speed to drive the controlled object. The rotor speed of the servo motor is controlled by the input signal and can respond quickly. In the automatic control system, it is used as a driving element, with characteristics such as small electromechanical time constant, high linearity, and high starting voltage. It can convert the received electrical signal into an angular displacement or angular velocity output on the motor shaft. It is divided into DC and AC servo motors. Its main characteristic is that when the signal voltage is zero, there is no rotation phenomenon, and the speed decreases at a constant speed with the increase of torque. DC servos require brush commutation, limited speed, additional resistance, and easily produce worn micro-materials, while AC servo control is more complex, the driver parameters need on-site adjustment of PID parameters, and the electronic circuit is more complex.
From the perspective of torque of dividers and servos, indexing dividers are greater than servo motors. Of course, when large torque and high precision are not required, servos still have certain advantages. The cost of servo motors is higher than that of servo motors. In terms of operational stability, indexing dividers are superior to servo motors. The specific application depends on the actual selection requirements of the automation system. Of course, some experienced engineers will utilize the advantages of dividers and servo motors, using servo motors to drive automatic dividers, mainly applying the high-speed stability of dividers and the precise positioning of servos.
In summary, indexing dividers have obvious advantages over servo motors, so they are favored by engineers in practical applications.
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