# Engineering Tutorial

## Movement dictated by time

1. Add a motor and set it to forward.

2. Add another motor and set it to backwards.

3. Add time(wait) in between the two motors.

4. Connect the two motors to the “time”.

5. Make a constant of “time”, and put in number.

6. Connect the two motors by clicking “output port”.

7. Make a constant by right-clicking the “x” sign.

8. Connect the port constant with the line connecting the two motors.

## Movement over a specific distance

1. Open labview

3. Name it movement dictated by time or distance.(depending on what you want to create

4. On the front panel right click and click nxt robotics then click on motors

5. Place it somewhere on your screen

6. Then right click again, nxt robotics, then click on wait

7. Place that on the right side of the motor block

8. Right click the top of the motor block, then click create, constant. Make sure your motors are on the correct ports A&C

9. Then on the block click on the box and press wait for time, or distance

10. Right click the left side of the wait box, create, constant

11. Type in the amount of time in seconds that you want it to run. If distance type the number of rotations

12. Then connect the motor block to the wait block where the hour glass is

13. Then click run on the top right had corner

## what does the code look like for the following:

a) Zero point turn: Both motors(wheels) turning the opposite direction. For example, one motor can be set as forward and the other one can be set as backwards.

b) Left point turn: Left wheel brakes, and the right one keeps going, which makes the robot turn.

c) Right point turn: Right wheel brakes, and the left one keeps going, which makes the robot turn.

d) Left "car" turn: The power of the left wheel is less than the power of the right wheel, which makes the robot turn.

## ‘’While ‘’, ‘’For’’ Loop and what they use for

While loop is an infinity loop and it runs forever until you stop it or the robot ran out of battery .

For loop is like a time loop you set the time and it will run until the time is over .

## How does a Case structure work ?

Case structures give circumstances so if something is true this would happen and if it is not true something else would happen

Create a case structure

click true

Create a motor block

Right click create constant, Ports A and C

Place that in the case structure

Click false on the case structure

Create Motor On Ports A and C

click the box and select reversed

place that in the case structure

Then create a touch sensor and place it outside of the case structure

Set it to release then connect it to the case structure.

run program.

## What are some other "structures" ?

There are for loop , while loop , Local variable , case structure , stacked sequence structure , Formula node.

## How can you "motor sync"?

Motor sync can be achieved by using feedback control that tracks your motor activity and you can use math to even it out

## how do I use loops/structures to improve sensor A.I.?

For loops can run infinitely if needed for a long term AI or for sensors to keep checking for conditions infinitely.

While loops can be used so that if sensors detect something the the code is executed and can replace for loops but take sensor inputs instead of number of times to run.