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

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

  • #484
  • 12 Apr 2017
  • 6:05

Three sides and two planes

Take a look at the brick. There are holes on three sides of the brick: the left, the right and the bottom one.
As left and right sides are parallel, they are actually on the same plane.
The bottom is another plane.
Those two planes cannot be connected together with simple beams and pins.

 

The angular beam with pins

Let's try to connect a vertically oriented sensor to the bottom plane of the brick.
There is a turn in the directions, the planes are perpendicular to one another.
A part that can connect them together is the angular beam with pins.

You can think of the angular beam with pins as changing the planes "direction":

  • from forward to upward;
  • from forward to downward;
  • from forward to left;
  • from forward to right;


The straight beam with pins

The straight beam with pins changes only the orientation:

  • from forward-horizontal to forward-vertical;
  • from left-vertical to left-horizontal

 

English

We would give this video a stranger more complex name and we'll call it 'Changing the plains in which you extend your construction' What exactly does this mean and how do we use these beams with pins?

Looking at the robot you have holes on the right side of the brick, on the left side of the brick, at the bottom of the brick. And you don't have any holes at the front side of the brick, at the back side of the brick and on the top of the brick. You can think of building with this brick in building in three different plains. This is the first plane. It's a vertical plain that's on the right side. This is another plain on the left side which is basically the same plain and you have one at the bottom. When you do a construction at the bottom of the robot you can see that you are building in this plain and you have the holes in this direction. What will happen if you want to change the direction and to build in another plain? And you want for example to have your sensor positioned like this. And it is kind of difficult to do it. You should somehow extend the construction and position the sensor like this. You should change the plains in which you are working. How do you do this? First, you take this beam.

And then we use this beam with pins.

The correct name of this part is angular beam with pins and it looks like a beam it has holes but it also has 4 pins. So, it has like 5 holes and 4 pins. And it is used do change the plain in which your construction extends. If I place the beam like this and then another beam, now I can continue building this construction in another plain and this plain is right here. And as you can see this is kind of like the plain that we would have if we had any holes at the front of the robot. So, if there were any holes right here somewhere we can attach this beam, this is the same plain in which we are working. It is a plain that's at the front of the robot. And now we can just place our touch sensor. Again, the touch sensor here is used just as an example. We can also use this part - a beam with pins and it serves the same purpose. We change the plain. Imagine that we have some holes at the top of the robot - at the top of the brick but we don't. But if we had, we would be able to do the following thing. To attach a beam at the top of the robot. But there are no holes. We can for example try to attach this beam right here but you can see that these holes are pointed vertically and these ones are horizontal and these are different plains. So, we take this beam with pins and we can change directly the plain in which we are building. By adding one you see that it's almost the same as having holes at the top of the robot. So, from a side of the robot - the right side we've changed the plain to the top of the robot. And then we can add one more like this and we can directly add the touch sensor.

And you can see that the whole touch sensor it's tilted right and it's actually rotated right. And it's in another plain. It's in the plain that's for the top of the robot. So, with this angular beam with pins and the normal beam with pins we change the plain in which we are extending our construction. You can stack this solutions. For example, an interesting way to show this is how would you place the touch sensor to point to the right of the robot. How would you do this? You'd use an angular beam with pins. This will change the plain of buiding from right to front. Then we use a beam as an extention and then we use two pins

and we have our sensor pointing to the right. Now, it's probably not that useful to have the touch sensor pointing to the right but you can have other sensors and you can have the construction generally extended to the right which is a very nice way to use the angular beam with pins. I think these are some of the most useful parts in the LEGO Mindstorms EV3 set.

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Image for EV3 Phi. Introduction to robotics with LEGO Mindstorms
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