
Improving FLL Robot Game. Why Large 40 teeth gear wheels are not suitable for this base
There were a few problems with the 40 teeth gears that we were using. Let's list some of them
- #446
- 06 Mar 2017
There were a few problems with the 40 teeth gears that we were using. Let's list some of them
Build a similar mechanism to this one. Similar, but for your robot. This is the task for you. Try, give yourself half and hour or even an hour.
Time to lift the robot. The first approach is by using the 40 teeth gear wheels that come with the LEGO Mindstorms EV3 and NXT robotics sets.
What is the end result? - have the attached on the mission model. What is the mechanism the would make the robot hang on the mission model.
Note for the teacher on how to organize the class to use different robot base constructions to accomplish the mission for lifting.
Build a robot base to use in the course. You can use the robot base provided by us or you can build one yourself.
Don't limit yourself to the box and think of different ways to lift the robot.
How to organize the different robots and group of students when working on lifting the robot.
Where should you lift the robot? Especially if you don`t have the mission model that we are using
How should an instructor use this course when working with students and a group of students in school
We've already build a number of resources for lifting at FLLCasts.com. But at the end of this course we would have a robot that lifts itself and hangs on the mission model.
The FIRST LEGO League competition is similar each year. With a little experience you could accomplish most of mission. The goal of this episode is to introduce you to the course, its purpose and approach.
Let's move with the VEX EDR robot using its motors, the wheels and some RobotC programming. We devide the program in three parts - Connect the motors, program the controller and turning.
Unpacking the VEX EDR set and learning the names of the different parts included in the set
Overview of what is going to happen in module 3
There are a few things that you should be careful about when building from instructions .
We will build the EasyBot quick robot and will explain how to follow building instructions.
The robot uses one middle motor. This middle motor with the use of a few gear systems controls for different axsels. We have attached wheels on this axles so it is very easy to extend the robot construction for additional LEGO Mindstorms active attachments
This robot has a color sensor and this sensor is used for following lines. Additional Mindstorms EV3 sensors could be place on the robot, like a Gyro sensor or a second Color sensor.
One of the very good things about box robots is that you could easily align with them both to the front, to the back or to the rear sides. This aligning is helpful for FIRST LEGO League, World Robotics Olympiad or other robotics competitions with LEGO Mindstorms EV3/NXT robots.
With the EV3 Mindstorms set you receive three motors. Two are large and one is medium. These three motors could be used in different configurations and in this video we show how to use the motors on the second box robot for competitions that we build.
Cable management is very important on each competition. Cables could get in the way of attachments, levers, different wheels and so on. Brick accessibility is also very important. Do not forget that the brick should be charged from time to time and that you should also be able to access the buttons.
This robot could quite possibly be build from a single EV3 core and EV3 resource sets. It uses fewer parts and only three motors. There are additional parts that could be skipped when building the robot and we have added these parts only as to make the construction more complete.
Here we start with a second box robot that we would like to build. It is in a way improvement to the first robot and we would take a look at its features.
One more example for an active attachment with a system of gear wheels. This time the system is constructed so that the attachment could lift heavy objects.
This is a third example for adding an active attachment. This third attachment is now connected to the wheel at the front of the robot. Again, the attachment could be easily extended.
Second active pinless attachment for the robot construction. It is placed in the top/right corner of the robot and includes an interesting gear system for transferring the power. The attachment is suitable for complete rotations.