Problem with dc motor speed control.

Other Hardware Motors, Mechanics, Power and CNC
1

Hi, I am using the motor driver l298 to control the speed of a motor like is shown in the link above.

The motor and the motor driver seems to work well, but the problem I have is that the speed is always the same. I have conected the ENA to a digital pin and I am using 6 AA bateries.

This is the code i used.

int enA = 10; 
int in1 = 9; 
int in2 = 8;   

void setup() {
   pinMode(enA, OUTPUT);
   pinMode(in1, OUTPUT);
   pinMode(in2, OUTPUT);
}

void loop() {
  for(int i = 0; i < 250; i++)
  {
    digitalWrite(in1, HIGH); // turn on left motor to forward
    digitalWrite(in2, LOW);
    analogWrite(enA,i);
    delay(200);
  }
}
2

If you exchange the HIGH/LOW constants for the in1/2 pins, does it change direction?

3

Is the motor under load? Have you tried seeing if that makes a difference?

4

WattsThat:
If you exchange the HIGH/LOW constants for the in1/2 pins, does it change direction?

yeah it works fine, but the problem is that it is always with the same speed.

5

I'd expect it to have very little effect on an unloaded motor - have you tried it under load?

6

Have you solved the problem ?