Spin turn with LEGO Mindstorms robots

A spin turn is a turn around the center of the robot. Let's learn how to program it.

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20 Apr 2017
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Definition

A spin turn is a turn around the center of the robot. Both motors are turning but in two different directions. You may hear us saying that the robot turns as a Tank.

In the Software

In the Actions palette, choose the Move tank block. The first power setting corresponds to the power of motor B and the second power setting corresponds to the power of motor C.

Equal speed, different directions

In order to make a spin turn, you must set two equal values for power and make one of them negative. For example, use 20 and -20. This will make the motors move at equal speed and in different directions.

Making exact right turns

You must experiment with the number of rotations a few times in order make a 90-degree turn with the robot.

English

A spin turn is a turn at place like this.

In this video we'll look how do we program the robot to do a spin turn.

In the software we go to the actions palette. And we take the move tank block. In the move tank block we set the number of rotations to 1 and then we have the power options, we have the power to the left motor and this is motor B and the power to the right motor and this is motor C. If we just set the power to the left motor

to -20 and the power to the right motor to 20, this means that the left motor will move backward while the right motor will move forward. And we'll have our robot spinning. It'll stay in place but the two wheels will move in different directions and this will make our robot spin.

We have our robot spinning and this wheel is doing one rotation forward while the other wheel is doing one rotation backward. And when both wheels are moving the whole robot stays in place. Again. From here it's just a matter of finding the right value so that we can have our robot turn around. But this will be for some of the next videos.

Courses and lessons with this Tutorial

This Tutorial is used in the following courses and lessons

EV3 Phi. Introduction to robotics with LEGO Mindstorms

The things that you will be able to do with your EV3 robot by the end of this course are:

Freely move your robot towards desired target;
Avoid obstacles on the path of your robot using sensors;
Follow lines of any shape;
Detecting and picking up objects of any kind;

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Turning with a LEGO Mindstorms Robot

So far we know how to make a turn in an arc, just like the real cars do.
Today we will see what other options our robots have for turning.

Instructors Remote Training

If you are working with students and you want to introduce Robotics to your class or you want to mentor a FLL team, but you are insecure about your technical knowledge in the Robotics field, then this is the right place for you. Having in mind teachers' busy schedule, we have design two different schedules and added an option to design one just for you. FLLCasts's Mindstorms EV3 Robotics Online Training is the perfect match for any teacher.

After the completion of each task the participant has to upload his solution for verification.

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How to make the robot move

Let's review the LEGO Mindstorms EV3 Intelligent Brick

The EV3 brick is the main computer of your LEGO robot and it has a display, a few buttons and various ports.

Level A1. Introduction. Robotics with LEGO

Introduction to robotics - The first level of the Robotics with LEGO curriculum for students in second, third or fourth grades. A journey in space, with robots. Various constructions with robots are built. Learn how to control the motors so that the robot navigates around the Sun, the Moon and Earth in various ways. Getting to know the first of the sensors. The robot can feel its surroundings with the help of the Touch sensor and avoid obstacles.