Teacher's Note: solving problems during the challenge "stop to the wall" Pro Preview

This is the first task in which your students will make many mistakes. We will prepare you for them now.

To access the full video please subscribe to FLLCasts.com

Subscribe

  • #623
  • 20 Aug 2017

Omitting the unlimited movement block

The first block is usually for rotations and the robot will make one rotation and then stop and wait for a press. The green lights of the brick will flash showing there is a working program but the robot will remain motionless.

Let’s remember what unlimited movement is

 - How many rotations the robot should make in order to reach the wall?
 - We don’t know!
 - When we don’t know, we should use the unlimited movement block.

When we use a sensor, we should always use unlimited movement as well.

Omitting the stop block

The robot moves for an unlimited period of time, touches the wall, pushes a little bit against it and then stops. If the robot pushes against an object, for example a box, the effect will be even more visible. You can allow students put their hands in front of the robot and feel it continues to apply some pressure even after the touch.

The reason is that they have forgotten to put a stop block and the robot continues moving for about half a rotation forward before it understands the program has ended and there are no other commands.

Courses and lessons with this Tutorial

This Tutorial is used in the following courses and lessons

Image for Robotics with LEGO - Level 1.0 - Adventure in Space
  • 126
  • 123:52
  • 150
Image for Level A1. Introduction. Robotics with LEGO
  • 142
  • 133:42
  • 187
Image for Lesson 6 - Touch sensor
  • 10
  • 3
  • 6
  • 3d_rotation 0