How much does a robot move when it turns 90°? How does this compare to a wheel turning 90°? What’s the difference?
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- #2160
- 23 Jul 2024
As you probably know, most robots have several options for turning their wheels. One of these options is by degrees.
When you use this option, it’s similar to turning the wheel by rotations, with each rotation equal to 360°. So, if you want a wheel to turn 2 rotations forward, you’ll set it to 720° (2x360°). Degrees are more useful for smaller movements. For example, instead of half (0.5) a rotation, you can set it to 180°. If you need it to be a bit less, instead of writing 0.4999, you can use 179°!
A turn of the wheel will NOT turn the whole robot by the same amount! For example, if you set the wheel to turn 90°, the robot will turn only a few degrees, definitely not 90°! How much a robot turns depends on the size of its wheels and the distance between its two wheels.
To turn the whole robot by a specific number of degrees, you can use several formulas or a gyro sensor, or simply try different values until you find the right one! Usually, the last option works best, but if you know how to use the other two, feel free to do so!
Courses and lessons with this Tutorial
This Tutorial is used in the following courses and lessons
Level A2 - History and Mythology - Robotics with LEGO SPIKE Prime
This is the second level of the LEGO Robotics Curriculum for second, third, and fourth-grade students.
In this level, we will focus on History and Mythology, with each lesson covering a different aspect of the ancient world. You will learn about a new distance sensor that uses ultrasound to help a watchtower robot detect invaders. We will also introduce new concepts such as loops, degrees, and a third motor. Additionally, you will learn how robots can perform two different tasks simultaneously.
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Lesson 1 - Ancient Boats
Introduction
In this lesson, we will learn how the ancient people managed to use the wind to navigate the seas, and we will build a boat robot!
People have used water for transportation for thousands of years. It was useful when you go downstream on a river or a sea current.
What do you think they did to go upstream?
They needed to use people with oars to fight against the current, which was really tiring and couldn't work for a long distance. So, people invented the first sailboats! They used the power of wind, which allowed them to go further faster, and they didn't need so many people to move them. The first record of a sailboat is a drawing on a vase in Egypt around 5500 years ago. However, sailboats were probably invented a long time before that.
The Phoenicians were the most famous naval people of the ancient Mediterranean world. They used their sailing boats to discover and trade with lands throughout the entire Mediterranean Sea, and even beyond, reaching as far as the British Isles. They became a massive trading empire and invented an alphabet, which was later the basis for the Greek and Latin alphabets we still use today!
Another people who mastered sailing around the same time were the natives of southeast Asia, who managed to sail all around the Pacific Ocean and reach even the furthest islands there.
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