Paper Requirements:

1. 12pt
2. Times New Roman
3. Two pages
4. Single spaced
   
5. Cite (at least) two sources

Prototyping Challenge 2

1. Build the assembly as laid out.

• It is recommended to make sure both robots have a home position coded from where they will each start their process.

2. Cut out and paste color identifiers to help the robot identify colors and/or shapes. For this project we are using it for color and stamp message. 

3. Pick a location for your wooden shapes (x,y,z). We recommend using the guides that came with the conveyor belt. As you can see, we stacked different shapes. This will be explained later.

• Don’t Forget! You will need to use a variable for your Z coordinate and decrease it each time as the robot keeps going down the stack.

4. Pick a location for your wooden shape placement on the conveyor. This can be done using the operation panel on the software OR by using the TEACHING & PLAYBACK method and observing the X,Y, and Z coordinates. 

5. Time and notate in seconds how long the whole process takes for the first robot to pick and lay down the shape on the conveyor. This will be the delay time required for the 2nd robot to start the conveyor belt.

6. Time and notate in seconds how long the shape takes to reach the other side where it will get picked up by the 2nd robot. In our example, we chose the location right in front of the color sensor.

• You might be asking yourself why not use the photoelectric sensor to detect the object and STOP! We can’t use the sensor in this situation because the product (wooden shapes) are flat. So we have to use time synchronization.

7. Notate your x,y,z coordinates for pick up. It well then be transported for color checking of the identifiers you cut out and pasted on the bottom. This will tell the robot what stamp and color you want on that particular shape.

8. When the color (stamp identifier) at the bottom has been identified, the robot is to put the product back onto the conveyor belt and travel to a spot above that particular stamp.

9. When the color (stamp identifier) at the bottom has been identified, the robot is to put the product back and travel to a spot above that particular stamp (as pictured below).

• Spot for Blue Stamp 

• Spot for Green Stamp 

• Spot for Red Stamp 

• We highly recommend you execute the code and let robot run the course without actually stamping to make sure everything is aligned and working. This will reduce wasted ink, wood cut-outs, and money.

10. Once the robot reaches that x,y,z coordinate above the stamp it will then proceed to grab the stamp with suction and stamp the product at it’s x,y,z spot.

11. The robot arm is to then return stamp and come back to product.

12. Program Dobot to pick up product in a different x,y,x spot to prevent ink smudges while it dries (as pictured).

13. The robot arm is to then transport to proper PLACE location for storage.

• Don’t Forget! You will need to use a variable for your Z coordinate and increase it each time as the robot keeps stacking on top of the old product.

The whole process is to repeat by using loops and delays in your code perfectly synced in each robot. You will need to time each robot as each runs its course and returns back to the home position.

Here is a video demonstration of the full automation.

Note:

In order to complete this challenge, you will put into effect everything you’ve learned in the previous STEM lessons.

1. Pick and Place

2. Color sensing

3. Conveyor Systems

4. Suction Cup System

5. Stacking product (Z coordinate offsetting)

If you need to look back on previous lessons' code in order to complete the challenge, please feel free.