Wobble Line Following

This is the most basic line-following method, commonly known as the "ducky" line-following method.

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02 Aug 2024
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Many people who have never programmed a robot to follow a line assume that the robot moves forward along the line and only turns toward it when it veers off. While some robots can be programmed that way, the reality is that most robots follow one of the two edges of the line. This is because, although moving forward along the line is easy to program, determining whether the robot has deviated to the left or right side of the line can be more challenging.

An easy solution to this problem is to control the robot’s deviation by having it actively turn in a specific direction while following the line, rather than just moving straight forward. This way, we always know which direction the robot has deviated, and we can return it to the line by programming it to turn in the opposite direction. Moving forward in this manner creates a "wobble"-like motion.

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Line Following

This is the Line Following course, where you’ll explore essential techniques to help your LEGO robot follow a line with accuracy and stability! We will begin by covering the fundamental concepts of line following, starting with basic wobble line following, which teaches how robots detect and respond to lines. Then, we'll progress to more advanced methods like proportional line following, allowing smoother tracking by adjusting speed based on error values. Finally, you'll dive into the widely-used PID line following technique, where you'll learn how to tune parameters for optimal robot performance. Whether you're a beginner or looking to enhance your robotics skills, this course will guide you through building, coding, and refining your robot's line-following capabilities.