Third wheel experiments, changes in the robot, students could choose the task all by themselves. Make sure you have a lot of fun and students complete their tasks. Here is what you should know when conducting this class.
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- #1375
- 28 Jun 2019
Let the students change the third wheels on their robots, but only after they have programed the robot to move in a square. Some of the students will try to change the program to achieve a better square with each of the third wheels. This is not required of them. The goal of the excersize is to understand the following things about the different constructions.
- The presence of a tire in the supporting wheel is not allowing the robot to turn smoothly.
- Construction 3 - the presence of a wheel that turns in the direction of the robot could be helpful. But it should be placed correctly at the beggining.
- A third wheel like construction 1 where there is no wheel, but just parts supporting the robot could lead to different turns depending on the surface on which the robot is turning.
- Caster wheel like Construction 2 lead to a problem similar to Construction 1
Students will ask to choose the additional task all by themselfs. Depending on your judgement of the time left in the class you could allow this. But you should consider if they will be able to complete the task in the time left.
Courses and lessons with this Tutorial
This Tutorial is used in the following courses and lessons
Level A2. "Space exploration". Robotics with LEGO
The second level of the Robotics with LEGO curriculum for students in second, third or fourth grades.
A new sensor is introduced - the Ultrasonic distance sensor can help the robot avoid obstacles. Students work with new concepts like loop, degrees and medium motor. Robots can now do two different actions at the same time - while solving missions on a field, the third motor clears detected obstacles. The first robot with chain-treads is built.
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Lesson 2 - Third Wheels and Square
Intro
Today we will test different support wheels and determine which one is most suitable for a robot that we will send to the moon.
The robot on the moon will be powered by a solar battery, but that means it has very little electricity and must not waste much of it to turn and navigate. You will need to find which support wheel resists the least when turning.
Another terrible problem would be if the robot got stuck. It will be too expensive to send a mechanic to the moon to help him. We will have to determine which wheels would get stuck easily in a small hole and which wheel can the robot pull out.
All teams should build different third wheels after which students can swap them.
At the end of the lesson, the most successful teams will be awarded a bonus task!
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