Every teacher/instructor can conduct classes with students using these resources. You need to motivate and organize the students. We provide the technical theory, tasks, instructions, programs and everything needed.
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.
The next step of lifting a robot to a mission model is to try to use a rack.
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.
Build a rack and try to lift the robot with this rack.
The final way for lifting our box robot is by using a scissors mechanism. In this Episode, we would discuss the benefits and advantages of this mechanism.
In this tutorial, we would drive the scissors mechanism and there are a number of rules that we must follow
Don't limit yourself to the box and think of different ways to lift the robot.
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.
How should an instructor use this course when working with students and a group of students in school
Where should you lift the robot? Especially if you don`t have the mission model that we are using
Build a robot base to use in the course. You can use the robot base provided by us or you can build one yourself.
Note for the teacher on how to organize the class to use different robot base constructions to accomplish the mission for lifting.
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.
One of the very common problems with the LEGO Mindstorms and LEGO Technic Gear wheels is then a tooth is skipped. In this video, I would like us to discuss this challenge and how do we solve it.
How to organize the different robots and group of students when working on lifting the robot.
Connect the attachment to the box robot and find the correct number of rotations of the middle motor that would bring the robot up and forward and would attach it to the mission model.
Remember the passive/active attachment separation that we are making at FLLCasts.com. This applies for all the attachments and in this Episode, we are looking at how to use a passive attachment.
How great is the great attachment for lifting that we built in this course? How many times can it lift the robot without making an error? How great are your attachments and how could you test them? - the answer is simple. Just try 10 times and they should work at least 9 of them as our attachment is.
Using the rack depends on the experience of the team. Based on this a different number of gear wheels and racks would be used.
It this episode we would present you with our attachment for lifting the robot.
Here is our solution for preventing torsion and bending of the LEGO Mindstorms EV3 axles.
Before moving forward here is the simple task of building the mechanism and extending the legs. Extend the legs to fifteen LEGO units.
How to align the wheels and how much should you push for this solution?
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.
There were a few problems with the 40 teeth gears that we were using. Let's list some of them
Building a rack is a very important skill during competitions. You should try to build one, learn how to use it and have it as a tool for you next robots. But for this particular BoxRobot, we will not continue with a rack.
The most stressed wheel in our system is the driven wheel. We've already fixed the problem with the driving wheel of the scissor mechanism and now it is time to look at the drive LEGO Mindstorms wheel.