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Arduino Forum Stepper Motor Programming Question.
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  • arduino_sketch;
  • stepper_motor
Related

Stepper Motor Programming Question.

e14 Contributor
e14 Contributor over 13 years ago

Hello, I have a quick question about my code to control my stepper motor. Basically it's a bunch of "if" statements that read voltage and then decides how to turn the stepper motor. Everything is working real well, but I was wondering if there is a way for the stepper motor to skip having to take each step. What I mean is that when I want it to rotate 45 degrees, it hits each step at 1.8 degrees. Is there a way for it to move 45 degrees without hitting each step? I want to try and make the rotations smoother. Here is the code:

 

#include <StepperDriver.h>

 

int sensorPin = 0;

 

int dirPin = 8;

 

int stepPin = 9;

 

const int stepsPerRevolution = 200;

 

StepperDriver myStepper;

 

void setup()

{ 

  myStepper.setStep(stepsPerRevolution, dirPin, stepPin);

 

  myStepper.setSpeed(50);

 

  myStepper.step(stepsPerRevolution*4);

 

  Serial.begin(9600);

}

 

 

void loop()

{

 

  int sensorValue = analogRead(sensorPin);

 

  float voltage = sensorValue * (5.0 / 1023.0);

 

  Serial.println(voltage);

 

  if (voltage >= 4.5)

  {

    if (myStepper.update() == 1)

    {

    delay(1000);

   

    myStepper.step(stepsPerRevolution);

    }

  }

  else if (voltage > 4.0 && voltage < 4.5)

  {

    if (myStepper.update() == 1)

    {

    delay(1000);

   

    myStepper.step(stepsPerRevolution/2);

    }

  }

  else if (voltage > 3.5 && voltage <= 4.0)

  {

    if (myStepper.update() == 1)

    {

    delay(1000);

   

    myStepper.step(stepsPerRevolution/4);

    }

  }

  else if (voltage > 3.0 && voltage <= 3.5)

  {

    if (myStepper.update() == 1)

    {

    delay(1000);

   

    myStepper.step(25);

    }

  }

  else if (voltage > 2.6 && voltage <= 3.0)

  {

    if (myStepper.update() == 1)

    {

    delay(1000);

   

    myStepper.step(1);

    }

  }

  else if (voltage > 2.0 && voltage <= 2.4)

  {

    if (myStepper.update() == 1)

    {

    delay(1000);

   

    myStepper.step(-1);

    }

  }

  else if (voltage > 1.5 && voltage <= 2.0)

  {

    if (myStepper.update() == 1)

    {

    delay(1000);

   

    myStepper.step(-25);

    }

  }

  else if (voltage > 1.0 && voltage <= 1.5)

  {

    if (myStepper.update() == 1)

    {

    delay(1000);

   

    myStepper.step(-stepsPerRevolution/4);

    }

  }

  else if (voltage > 0.5 && voltage <= 1.0)

  {

    if (myStepper.update() == 1)

    {

    delay(1000);

   

    myStepper.step(-stepsPerRevolution/2);

    }

  }

  else if (voltage >=0 && voltage <= 0.5)

  {

   if (myStepper.update() == 1)

    {

    delay(1000);

   

    myStepper.step(-stepsPerRevolution);

    }

  }

}

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