User Manual

44
itself.
How to make a track for line following
To make a track for the car to follow a black line, you need to prepare the following materials:
A large sheet of paper, a roll of black tape (as black lines), a hard card board (the size
depending on the size of the track) or a flat surface like the floor or desk.
1. Spread the paper out smoothly on the hard board, and paste on the board or flat surface.
2. Paste the tape on the paper.
Rules for making:
1. Width of the black line: about 18-30mm, nearly the distance between two probes, no
more than the minimum distance of two nonadjacent probes
2. The gap between two lines: more than 125mm, which is the width of the whole module,
to prevent the car from getting confused when detecting two lines at the same time.
3. The semidiameter of curves: more than 138mm. When the front wheels turn left or right 45
degrees, the semidiameter of the path by which the car turns is equal to the wheelbase
(the distance between the center of the front wheels and rear wheels). The car won't be
able to turn and pass the curve smoothly if the semidiameter of the curve is too small.
A track sample is shown as below (the original map file can be found under folder map in
github):