IoT Practicals / Stepper Motor Control

Stepper Motor Control - Precise Rotation Control

Objective: Control a stepper motor to rotate in both clockwise and counter-clockwise directions with precise steps.

This project demonstrates motor control using the Stepper library for applications requiring precise positioning and movement control.

Required Components:

#include
const int spr=4;
Stepper steper (spr, 8, 9, 10,11) ;

void setup () {
  steper.setSpeed (10);
  Serial.begin (9600);

}

void loop () {
  steper.step (40) ;
  delay (1) ;
  steper.step(-40);
  delay (1) ;
}

How it works:

  • Stepper Library: Arduino's built-in library for controlling stepper motors.
  • SPR (Steps Per Revolution): Set to 4 for this motor configuration.
  • Pin Configuration: Uses pins 8, 9, 10, 11 for motor control signals.
  • setSpeed(10): Sets motor speed to 10 RPM for smooth operation.
  • step(40): Rotates motor 40 steps clockwise.
  • step(-40): Rotates motor 40 steps counter-clockwise.
  • Continuous Loop: Creates oscillating back-and-forth movement.

Circuit Connection (ULN2003 Driver):

  • IN1 → Arduino Pin 8
  • IN2 → Arduino Pin 9
  • IN3 → Arduino Pin 10
  • IN4 → Arduino Pin 11
  • VCC → 5V Power Supply
  • GND → Ground (Common with Arduino)
  • Motor pins to stepper motor connector

Applications:

  • Camera pan/tilt systems
  • 3D printer axis control
  • Robotic arm joints
  • Automated blinds/curtains
  • CNC machine positioning