Arduino stepper motor control with CNC shield and DRV8825

Projects Programming
1

Im using this example to run a setup seen on:

How do i rewrite the code to continuously move in one direction and adjust speed?

#define EN        8  

//Direction pin
#define X_DIR     5 
#define Y_DIR     6
#define Z_DIR     7

//Step pin
#define X_STP     2
#define Y_STP     3 
#define Z_STP     4 


//DRV8825
int delayTime=30; //Delay between each pause (uS)n
int stps=6400;// Steps to move


void step(boolean dir, byte dirPin, byte stepperPin, int steps)

{

  digitalWrite(dirPin, dir);

  delay(100);

  for (int i = 0; i < steps; i++) {

    digitalWrite(stepperPin, HIGH);

    delayMicroseconds(delayTime); 

    digitalWrite(stepperPin, LOW);

    delayMicroseconds(delayTime); 

  }

}

void setup(){

  pinMode(X_DIR, OUTPUT); pinMode(X_STP, OUTPUT);

  pinMode(Y_DIR, OUTPUT); pinMode(Y_STP, OUTPUT);

  pinMode(Z_DIR, OUTPUT); pinMode(Z_STP, OUTPUT);

  pinMode(EN, OUTPUT);

  digitalWrite(EN, LOW);

}

void loop(){

  step(false, X_DIR, X_STP, stps); //X, Clockwise
  step(false, Y_DIR, Y_STP, stps); //Y, Clockwise
  step(false, Z_DIR, Z_STP, stps); //Z, Clockwise

  delay(100);

  step(true, X_DIR, X_STP, stps); //X, Counterclockwise
  step(true, Y_DIR, Y_STP, stps); //Y, Counterclockwise
  step(true, Z_DIR, Z_STP, stps); //X, Counterclockwise

  delay(100);

}
2

It would probably be easier to start with a completely new program because all those delay() and delayMicroseconds() will prevent the program from being responsive.

Have a look at the second program in this Simple Stepper Code. You could add code to it to adjust the value of millisBetweenSteps - perhaps with a potentiometer.

...R
Stepper Motor Basics

3

Hi flavoni,

programming is something very different from asking for
"what's the cheatcode for game XY to reach final level?

Where somebody can post the cheat-code in one line

you type the code into your PC in and are done.

Programming is completely different.
Programming needs to understand how the code works.

This demo-code is pretty small. If you still have difficulties to understand it
I recommend this introductional tutorial

Arduino Programming Course

It is easy to understand and a good mixture between writing about important concepts
and get you going.

When you learned to ride a bike. Did you start in a halfpipe trying do do backloop-jumps?
Surely not. It's the same thing with learning programming. Though it is not as dangerous as having a crash in a half-pipe.

You will moving up the learning-curve much faster if you take 3 or 4 hours time to work through this introductional tutorial.

The minimum what you have to do that I will answer is:
Asking a concrete question related to your code. This question can be very very very simple it just has to be concrete and a relation to the code posted above.

best regards Stefan

4

My intentions are to get one project going for an installation, not getting through the arduino basics 101.

Appreciate your metaphores nevertheless...

5

This is the part that moves the stepper one step in the direction specified by its Direction pin. It sends a pulse to the Step pin of the stepper driver. Put this in loop() and the stepper will spin.

    digitalWrite(stepPin, HIGH);
    delayMicroseconds(delayTime);
    digitalWrite(stepPin, LOW);
    delayMicroseconds(delayTime);

To have more than one stepper move at the same time, add two digitalWrite() lines for each additional stepper.