Confusion about wheel movement.

greetings. had quick question trying arduino car move. running code

code: [select]

// turn on sensor begin finding location turn
// on servo motor determine position
// turn on stepper motors begin having car move

#include <servo.h>;
#include <stepper.h>;
const int pingpin = 12;
const int ledpin = 13;

servo myservo;    //create servo object control servo

//int angle = 0;   //variable store servo position

const int stepsperrevolution = 200; //change fit number of steps per revolution
int cm;
stepper mystepper(stepsperrevolution, 3, 4);
stepper mystepper2(stepsperrevolution, 5, 6);
void setup()
{
  serial.begin(9600);
  pinmode(ledpin, output);
  myservo.attach(7);
  mystepper.setspeed(40);
}

void loop()
{
  //declare main loop of entire program
  //turn on servo motor determine location
  //servo myservo;  //create servo object control servo
  int angle = 0;
  //myservo.attach(7);
  //serial.begin(9600);
  serial.println("senda");

  (angle = 0; angle < 180; angle += 1);
  {
    myservo.write(angle);
    delay(10);
  }
  (angle = 180; angle >= 1; angle -= 1)
  {
    myservo.write(angle);
    delay(10);
  }
 
  serial.println("you have succeeded point");


  serial.println("now on sensor");


  int cm = ping(12);
  serial.println(cm);
  digitalwrite(13, high);
  delay(cm * 10 ); //each centimeter adds 10 milliseconds delay
  digitalwrite(ledpin, low);
  delay( cm * 10);
  //return cm;
 
// activate stepper motors move foward
// begin looping if else statements
 if (cm <= 50) {
   serial.println("counterclockwise");
 mystepper.step(-stepsperrevolution);
 mystepper2.step(-stepsperrevolution);
 delay(3000);
 }
 else
 {
 serial.println("clockwise");
 mystepper.step(stepsperrevolution);
 mystepper2.step(stepsperrevolution);
 delay(3000);
 }
 
}

int ping(int pingpin)
{
  long duration, cm;

  pinmode(ledpin, output);
  digitalwrite(ledpin, low);
  delaymicroseconds(2);
  digitalwrite(ledpin, high);
  delaymicroseconds(5);
  digitalwrite(ledpin, low);

  pinmode(pingpin, input);
  duration = pulsein(pingpin, high);

  //convert time distance
  cm = microsecondstocentimeters(duration);
  return cm;
}
long microsecondstocentimeters(long microseconds)
{
  return microseconds / 29 / 2;
}

and when plug battery pack it, wheels move in 1 direction. stranger thing 1 wheel powered, while 1 powered sporadically. code or wiring. have 2 stepper motors connected l298n dual h-bridge curious. thank help.

have @ stepper motor basics. l298 poor choice driving stepper motors.

post link datasheet steppers using.
what sort of battery using?
have separate power supplies arduino , motors?

...r

Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > Confusion about wheel movement.

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