Which is good for servo motor and stepper motor
Servo motor (servo motor) is the engine that controls the operation of mechanical components in servo systems. The servo motor can control the speed, the position precision is very accurate, can convert voltage signal to torque and speed to drive the control object. Servo motor rotor speed controlled by the input signal, and can be rapid response, in the automatic control system, is used as actuators, and has a small electromechanical time constant, high linearity, initiating character such as voltage, can convert the received electrical signal to the motor shaft angular displacement or angular velocity on output. Divided into two major categories of dc and ac servo motor, its main characteristic is, when the signal voltage is zero no rotation, speed decreases with the increase of torque and uniform.The step motor is an open loop controlling element which converts the electrical pulse signal into angular displacement or line displacement. In the case of the overload, motor speed, stop position depends only on the pulse signal frequency and pulse number, and not affected by load change, when the stepper driver receives a pulse signal, it is driving a stepper motor according to set the direction of a fixed Angle, known as the "step Angle", its rotation is based on the Angle of the fixed step by step. It can control the amount of angular displacement by controlling the number of pulses, so as to achieve accurate positioning. At the same time, the speed and acceleration of the motor can be controlled by controlling the pulse frequency to achieve the goal of speed adjustment..
Let's see what the advantages of servo motors and other motors (such as stepping motors) are: Accuracy: closed loop control for position, velocity and torque. Overcome the problem of stepping motor out of step; Speed: high speed performance, the average rated speed can reach 2000 ~ 3000. Adaptability: strong resistance to overload, can withstand a load of three times the rated torque, especially in situations where instantaneous load fluctuation and require quick starting. Stable: running smoothly at low speed and running at low speed will not produce a stepper operation similar to stepping motor. Applicable to situations where there is a high speed response requirement; Timeliness: the dynamic time of the motor plus deceleration is short, usually within a few milliseconds. Comfort: a clear reduction in heat and noise.
In all aspects of control accuracy, it is certain that the servo motor is better, but the price of the servo motor is higher than the synchronous motor.
This depends on your specific application situation, two things in the absence of a constraint condition how to distinguish between good or bad High precision, fast speed and controllability are better than servo motors
One, the control accuracy is different Low frequency characteristics are different Three, the moment frequency characteristic is different Four, overload ability is different Running performance is different Speed response performance is different The servo is higher than the step, does not have that good bad, see for what profession and what circumstance
