13EC: Disk Transport

Learning Target

• Create a VEXcode blocks project
• Use sensors and iteration to complete a robotic task
• Understand absolute heading measurements

Background Info

• The Disk Transport playground occupies a square grid measuring 2000 mm by 2000 mm
• The VR Robot’s starting position is at the coordinate (0, -800)
• Each square within the Disk Transport playground grid is 200 mm in size

• The standard VR Robot measures approximately 133 mm by 151 mm
• The wheels are 50mm in diameter
• It has an electromagnet to pick up or drop game elements
• It has two color sensors, one below it and one on its front.

Instructions

Step 1: 

Use this link to access the school's Premium License for VEXcode VR:

https://vr.vex.com?classcode=GZXJUX

Step 2:

Click the "Select Playground" button.

Choose the Disk Transport playground.

Step 3:

Your goal is to sort:

• • as many colors as possible
  • using the fewest number of code blocks

A disk is considered sorted once it is entirely contained within the correctly colored boundary and white floor surrounds the entire disk. 

Step 4:

You can make your code much shorter by using the repeat block:

You can automate your movement by driving until you see a disk:

You can stop when you get close to a wall using something like this:

You will need to pick up and release the disks using the electromagnet:

You can use this block to make sure your robot is pointed in a specific compass direction:

  This points the robot to the West (or to the left)

Step 5:

Once you get your code working:

• • How could you reduce the number of code blocks?

Extra Credit