Line Follower Complications

Projects General Guidance
2

You should post your code in </> tags.
When you say the track is a rectangle with gentle curves at it edges do you mean it is a rectangled with rounded corners?

Try to explain what your code is supposed to do.

In this case is the follower not in the middle of the black line, if so why does it try to turn right instead of going at full speed?

 if(sensorLEFT && sensorRIGHT)  //LEFT = BLACK e RIGHT = BLACK
    {
      velLEFT(255); //
      velRIGHT(115);//
    }

Here should it not be trying to turn left instead of going straight?

    if(sensorLEFT && !sensorRIGHT)  //LEFT = BLACK e RIGHT = WHITE
    {
      velLEFT(255);
      velRIGHT(255);
    }