### EV3 Phi. Extend a construction by changing the plane of building

In this video, we introduce two pieces: beam with pins and the angular beam with pins

**#484**- 12 Apr 2017

In this video, we introduce two pieces: beam with pins and the angular beam with pins

**#484**- 12 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

We start with the previous program where we made the robot move forward and turn. We continue in this tutorial with repeating the same RobotC instructions four times. Our goal is to make the robot move in a square.

**#338**- 12 Apr 2017

How to change the direction of a beam from horizontal to vertical.

**#483**- 11 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

To prepare the robot to move in a square and to use a loop in the program we would first make this VEX EDR robot move forward and turn, using a program developed with RobotC.

**#337**- 11 Apr 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

How to place the cup on the robot so that the challenge is challenging.

**#405**- 10 Apr 2017

In this tutorial we would introduce you to the concept of loops using this VEX EDR Robot. As a final result we would have a program that makes the robot move in a square and not by repeating the same instructions for move and turn four different times.

**#336**- 10 Apr 2017

We start with FIRST Technical Challenge and how you develop programs with the GamePads. It is up to you to decide how sticks, buttons and triggers from the GamePad will control the different motors of the robot and there are different decisions that you should make.

**#513**- 09 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

Try to solve the challenge of this module and observe the cup.

**#404**- 09 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

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

**#470**- 07 Apr 2017

Robots could do chores for us and they must consider the load of the cargo or the robot could be damaged.

**#402**- 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

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

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

**#467**- 05 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