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How to correctly select servo motors and stepper motors

Time:2023-07-03 Views:869
    It depends on the specific application situation, according to the characteristics of the load (such as horizontal or vertical load), torque, inertia, speed, accuracy, acceleration and deceleration requirements, upper control requirements (such as requirements for port interface and communication), and also depends on whether the main control method is position, torque or speed, whether the power supply is DC, AC or battery, voltage range, etc. Based on this, determine the model of the motor and the accompanying driver or controller.

servo motor

stepping motor

Comparison of specific characteristics between the two:

Torque range:

Small and medium-sized torque (generally below 20Nm)

Small, medium, large, full range

Speed range:

Low (generally below 1000RPM)

High (up to 5000RPM), with DC servo motors up to 10-20000 RPM

Control method:

Mainly based on position control

Diversified control methods, position/speed/torque/bus control

Smoothness:

Vibration at low speeds (improved by subdividing the driver)

Okay, smooth operation

Precision:

Generally lower (higher when driven by subdivision)

High (depending on the resolution of the feedback device)

Moment frequency characteristics:

Fast torque decrease at high speeds

Good torque characteristics, with hard characteristics

Overload characteristics:

No overload capacity, may lose step when overloaded

Capable of 3-10 times overload (short time)

Feedback method:

Most of them are open-loop control (can also be connected to encoder to prevent loss of step)

Closed loop mode, encoder feedback

Feedback type:

May I ask for no feedback

Optoelectronic rotary encoder and rotary transformer type

Response speed:

same as

fast

Vibration resistance:

good

General (rotary transformer type can withstand vibration)

Temperature rise:

High operating temperature

same as

Maintainability:

Basically maintenance free

preferably

Price:

low

higher







 












   
      
      
   
   



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