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24/12/2021

Micro-stepping in Stepper Motor

 

Principle of Micro-stepping

  • The rotor of the stepper motor does not rotate smoothly in the half step as well as full step operation but rotor rotates with some jerk when step angle changes.  
  • The operation of stepper motor with micro step driving result in less vibration and low noise.  
  • In order to achieve micro step operation,

( 1 ) Magnitude of current is kept constant in the phase winding X and current magnitude increases from zero to maximum in the phase winding Y. 

( 2 ) Similarly, the current magnitude of phase winding X increases from zero to maximum whereas the current magnitude of phase winding Y is kept constant.


micro-stepping-in-stepper-motor.png


  • This will result in small step angle and it is called as Mini step or Micro step. 
  • We can achieve 0.018o with micro stepping, resulting 20,000 steps per revolution. 
  • Figure shows step mode and steps angle for micro stepping operation.

What is micro-stepping? Micro-stepping in stepper motor

Micro-stepping drive

Step Mode

Step Angle

1/1

900

1/2

450

1/4

22.50

1/8

11.30

1/16

5.60

1/32

2.90

 

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