Stepper Motor Code Help, Vibrating and not moving.

Projects Programming
1

Hello everyone, I am fairly new to arduino. I am trying to make my stepper motor move a 1/2 turn when I press on button and a full turn when i press another. If I write just the code for one button it works, but if I add the coding for the other button the stepper vibrates constantly and wont move. What am I doing wrong?

I plan on eventually incorporating 4 buttons to do 1/4, 1/2, 3/4 and a full turn.

//Stepper Driver for table saw fence V.1



#include <Stepper.h> // Include stepper library

#define STEPS 2038 // Number of steps per revolution (28BYJ-48)stepper

Stepper stepper(STEPS, 8, 9, 10, 11); // name of stepper, number of steps and pins 

int pushButton = 3; // Push button on pin 3
int pushButton2 = 4; // Push button on pin 4

void setup()
{
  pinMode(pushButton, INPUT); // push button is an input
  pinMode(pushButton2, INPUT);
 
  stepper.setSpeed(10); // sets speed of stepper to 10
}

void loop()
{
  int buttonState = digitalRead(pushButton); // assign variable to button
  
  if (buttonState == 1)
    {
      stepper.step(1019); // if button is pressed turn 1/2 rotation and stop
    }

  int buttonState2 = digitalRead(pushButton2);

  if (buttonState2 == 1)
  {
    stepper.step(2038);
  }
    delay(1000); //delay to allow time for spin and release of buttons
}

Thanks!

2

How are the buttons wired? Normally it's easiest to use INPUT_PULLUP mode, and wire the button to ground. Then LOW indicates that it's pressed.

  int buttonState = digitalRead(pushButton); // assign variable to button

if (buttonState == 1)

This detects if the button IS pressed, not when it first BECOMES pressed. You should also research debouncing.

3

You never told it what to do when the button is low. Also do you use pull up or down resistors for you buttons?

4

A 'vibrating and not moving' stepper motor almost always means that you have the wires to the coils hooked up in the wrong order.

5

I have pull Down resistors connected to the buttons. I will Try The INPUT_PULLUP and see if that makes a difference.

Do i need to tell it what to do when no button is pressed? does it just default to doing nothing?

The stepper should be wired correctly. When i uploaded a test program made for the stepper and stepper controller it worked just like it was supposed to.

6

What happens if you change the code like this

void loop()
{
  int buttonState = digitalRead(pushButton); // assign variable to button
  int buttonState2 = digitalRead(pushButton2);
 
  if (buttonState == 1)
  {
     stepper.step(1019); // if button is pressed turn 1/2 rotation and stop
  }

  else if (buttonState2 == 1)
  {
    stepper.step(2038);
  }
  delay(1000); //delay to allow time for spin and release of buttons
}

...R

7

Got it to work! Ended up using a variety of what you guys said to make this code,

//Stepper Driver for table saw fence V.1


#include <Stepper.h> // Include stepper library

#define STEPS 2038 // Number of steps per revolution (28BYJ-48)stepper

Stepper stepper(STEPS, 8, 9, 10, 11); // name of stepper, number of steps and pins 

int pushButton = 3; // Push button on pin 3
int pushButton2 = 4; // Push button on pin 4

void setup()
{
  pinMode(pushButton, INPUT_PULLUP); // push button is an input pull up (High when not presses)
  pinMode(pushButton2, INPUT_PULLUP); // push button is an input pull up
 
  stepper.setSpeed(10); // sets speed of stepper to 10
}

void loop()
{
  int buttonState = digitalRead(pushButton); // assign variable to button
  int buttonState2 = digitalRead(pushButton2);
  
  if (buttonState == LOW)
    {
      stepper.step(1019); // if button is pressed turn 1/2 rotation and stop
    }
    else if (buttonState2 == LOW)
  {
    stepper.step(2038);
  }
  
  
    delay(1000); //delay to allow time for spin and release of buttons
}

Thanks for all the help!