Improving FLL Robot Game. Attachment for lifting using the LARGE 40 teeth gears wheels
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.
- #444
- 06 Mar 2017
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.
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.
There were a few problems with the 40 teeth gears that we were using. Let's list some of them
How to align the wheels and how much should you push for this solution?
In this video we discuss the durability of the construction of LEGO robots and how do we make them more durable.
Following the principles from the previous video, try to make the attachment that you've built, more stable and durable.
Note for the teacher on making the construction more stable, more durable and using beams for this.
Let us do a quick recap of the whole lifting mission and its solution
We calculate the number of rotatios when a gear system is involved. The driving wheel will have to do a number of rotations for the driven wheel to rotate to a desired number of degrees. In our specific case when the driven gear wheel is rotate to about 90 degrees the legs will lift the robot.
Calculate the number of rotations you have to do with the motor to rotate the final small 8 teeth driving gear wheel to 1.25 rotations?
What should you do as a teacher when the students are calculating the gear ratios and number of needed rotations?
In the previous video, we found the correct answer for our task and it is 18.75, or is it?
Sometimes the answer that you get by calculating seems not to be right. Is it the calculation that is wrong. Probably it is not the calculation, but something is happening with 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.