Upload
others
View
1
Download
0
Embed Size (px)
Citation preview
Marble Sorter Project
Fernando Ruiz, Barrett Smith, Jacob Phillips
Principles of Engineering
Mckinney High School
18 February 2015
1
Table of Contents
Design Brief………………………………………………….2
Brainstorming Ideas……………………………………….. 3
Decision Matrix……………………………………………...4
Initial Pseudocode…………………………………………..5
Initial Sketch………………………………………………....6
Gantt Chart………………………………………………......7
Parts List……………………………………………………..8
Design Modifications…………………………….………….9
Building Process……………………………………………10
Program for Build…………………………………………..11
Final Sketch…………………………...…………………....12
Final Design Solution………………………………………13
Reflection……………………………………………………14
References………………………………………………….15
2
Design Brief
Client Company: National Recreation and Park Association Target Consumer: Society Designer: Fernando Ruiz, Barrett Smith, Jacob Phillips Problem Statement: The National Recreation Park Association (NRPA) has asked your team to develop a solution to a growing problem 2in their parks. The association has placed dumpsters for recyclable material throughout the parks. They have a sorting facility; however, they need a device that will sort the recyclable material. Design Statement: Design, model, and test a device that will separate recyclable materials. Constraints: 1. Separation process must be fully automated.
2. Must successfully separate commingled recyclable materials
into individual holding bins.
3. Recyclable materials include 3 different ½in. material spheres
totalling 15. Examples could include steel, aluminum, wood,
opaque plastic, and clear plastic.
4. Must be efficient 2 Minute max for completion of sorting
process.
3
Brainstorming Ideas
4
Decision Matrix
5
Initial Psuedocode
6
Initial Sketch
Created by Jacob Phillips: 2/18/16
7
Gantt Chart
8
Parts List
9
Design Modifications Date Problem/Reason for
Modification Solution Picture
02/25/2016 The platform for where the marbles would be placed in the original design ended up being too unstable.
To solve this, we added support brackets to the beams to keep the platform from moving.
02/25/2016 Our original design included a trap door that would remove the large marble. We realized that the large marble did not have to be included in the project.
So we removed the large marble and the trapdoor to simplify our project.
N/A
02/25/2016 After inserting the lever into the build we realized that the lever was a long enough track for the marbles to roll down.
So we removed the large track that was originally part of the sketch.
03/03/2016 At first we had the barrier controlling the flow of the marbles at the beginning, but then we realized that the speed at which the marbles flowed down the track was to inconsistent, which caused the marbles to land on different spots on the lever.
To solve this problem we moved the barrier closer to the lever to keep the landing spot consistent.
03/04/2016 The marbles did not have enough space at the entrance of the barrier so they would get clogged up, causing the entire sorting process to fail.
We added a ceiling to keep the marbles from clogging up at the entrance.
03/07/2016 The only idea generated to separate the plastic marble and the wood marble was to take advantage of the plastic ball’s ability to bounce higher than the wood.The original idea failed because the plastic marble was not able to bounce high enough off of the base plate.
In order to complete the separation of the marbles we added a metallic tray which allows the plastic marble to bounce higher than the wood.
10
Building Process
Picture taken on: 02/29/2016 Original Entrance/Original Barrier
Picture taken on: 02/29/2016 Lever/Track
Picture taken on: 03/04/2016 Track/Lever/Ceiling
Picture taken on: 03/04/2016 Ceiling/Barrier/Lever
Picture taken on: 03/04/2016 Full Build without containers
11
Program for Build
12
Final Design Sketch
13
Final Design Solution
14
Reflection
In this project our task was to separate 3 different types of marbles into separate containers. Our
team struggled in the beginning because of the fact that we had plenty of ideas but then we realized that the
ideas would not work. Brainstorming was supposed to be a two day process but because of the
complications concerning the ideas we were forced to add on two more days. Even after the 4 days of
brainstorming we still struggled to stick with one idea because of the problems we encountered. We
encountered many problems while building such as having to add a ceiling to keep the marbles from
clogging up, having to move back the barrier and having to constantly adjust the program for the build. Our
team struggled most with the separation of the wood marble and the opaque marble. It was difficult to find
an idea that would complete the task. What made it difficult was the fact that both are the same size and
about the same weight.Towards the end of the project we found a small metallic tray which ended being the
key to our project. This metallic tray allowed the plastic marble to bounce high enough while also keeping
the wood marbles from bouncing too high. We added a small tape barrier to the tray to stop the wood
marbles from bouncing over. We eventually adjusted the barrier enough to keep the wood marble in the tray
while also allowing the plastic marbles to bounce over. On March 18th we were finally ready to test our
project, after three trials our solution was able to put 42 out of 45 marbles in the correct container. Our team
was very satisfied with the results and our solution, as it is the most efficient solution so far. We felt that our
team cooperated very well, there were no real problems regarding our ability to work together as a team to
complete the task. If we were able to redo this project we would most definitely take less time working on the
small things in the project. We didn't really have a time where one person was stuck doing nothing. We all
worked together to attempt to complete the task and ended up having a solution that was able to separate
93.3% of the recyclable materials.
15
References
https://pltw.instructure.com/courses/263826/files/folder/Unit%203%20Control%20Systems/Lesson%203.3%20Design%20Problem%20%20Materials%20Sorter?preview=56487503
https://pltw.instructure.com/courses/263826/files/folder/Unit%203%20Control%20Systems/Lesson%203.3%20Design%20Problem%20%20Materials%20Sorter?preview=56487220