How to select the right motor for motion application ? Stepper or Servo?


#1

Simple electrical motor selection guide.

Selecting the right motor - Stepper or Servo ?

Ask the following questions to select the right motors

1.What is the load motor need to move?
2.What are the speeds motor needs to run at?
3.Does motor load vary throughout the move?
4.Is there any special function needs to be handled ? (Torque limiting,Holding torque)
5.AC power or DC power?
6.Budget?

Stepper or Servo ?

Motor performance -
Its often assumed servo motors outperform steppers of equivalence size.Take a look at a general torque vs speed curve of a stepper motor and servo motor of comparable size.

Torque Vs Speed curve of a Stepper motor and Servo motor

Features and Functions -
Position feedback
Holding torque
Torque control
Tuning required
Support dynamic load
Low speed smoothness
Cost

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Simple electrical motor selection guide.

Selecting the right motor - Stepper or Servo ?

Ask the following questions to select the right motors

1.What is the load motor need to move?
2.What are the speeds motor needs to run at?
3.Does motor load vary throughout the move?
4.Is there any special function needs to be handled ? (Torque limiting,Holding torque)
5.AC power or DC power?
6.Budget?

Stepper or Servo ?

Motor performance -
Its often assumed servo motors outperform steppers of equivalence size.Take a look at a general torque vs speed curve of a stepper motor and servo motor of comparable size.

Torque Vs Speed curve of a Stepper motor and Servo motor