### 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

**#444**- 06 Mar 2017

Build a robot base to use in the course. You can use the robot base provided by us or you can build one yourself.

**#440**- 06 Mar 2017

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.

**#445**- 06 Mar 2017

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.

**#473**- 10 Apr 2017

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.

**#443**- 06 Mar 2017

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.

**#477**- 13 Apr 2017

How to align the wheels and how much should you push for this solution?

**#447**- 06 Mar 2017

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.

**#442**- 06 Mar 2017

There were a few problems with the 40 teeth gears that we were using. Let's list some of them

**#446**- 06 Mar 2017

Think of an attachment that leaves the Gecko on the mission model. Don't use the robot attachment that we already have. Just the box robot and the gecko. Nothing should support the Gecko when it is hanged on the mission model.

**#481**- 17 Apr 2017

In this tutorial, we add another mission to our current program. This mission is - hanging the Gecko from the FIRST LEGO League Animal Allies.

**#480**- 16 Apr 2017

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.

**#468**- 06 Apr 2017

This is a teacher's note about the math behind calculating gear ratios with for our lifting attachment. It math model we build in previous tutorials is not exactly correct and here is the explanation why.

**#474**- 11 Apr 2017

The task in this tutorial is to execute the program 10 times and to do it yourself. If you have your attachment then use it. If you have our attachment then use it. But execute the program 10 times and make sure that it works.

**#478**- 14 Apr 2017

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.

**#472**- 09 Apr 2017

Let us do a quick recap of the whole lifting mission and its solution

**#467**- 05 Apr 2017

What should you as a teacher know when the students are trying to achieve a program and robot attachment that could reproduce their behaviour 9 out of 10 times.

**#479**- 15 Apr 2017

If you've done the calculation following the previous tutorials you would arrive at a result of 18.75 rotations. But this is not the correct answer. The calculation is wrong, because the math model that we've built, although kind of obvious, is not correct. When experimenting the correct number of rotations would be 37.5. This is a large difference. Two times larger. Exactly two times large. Something should be happening here - and this thing is "planetary mechanism"

**#476**- 12 Apr 2017

What should you do as a teacher when the students are calculating the gear ratios and number of needed rotations?

**#470**- 07 Apr 2017

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?

**#469**- 06 Apr 2017

In this video we discuss the durability of the construction of LEGO robots and how do we make them more durable.

**#463**- 02 Apr 2017

Note for the teacher on making the construction more stable, more durable and using beams for this.

**#465**- 04 Apr 2017

Following the principles from the previous video, try to make the attachment that you've built, more stable and durable.

**#464**- 03 Apr 2017

In the previous video, we found the correct answer for our task and it is 18.75, or is it?

**#471**- 08 Apr 2017