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Journal 11/11/2015 presentation model

I completed the proof of concept and I have constructed a cleaner model for presentation purposes.

Capture cutlist pic

The unevenness of lumber is still an issue that caused the track to get narrower towards the back of the track and minor modifications were needed to get the model to work consistently. The legs should be offset from the edge enough to account for the most extreme angles of the transition.

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In the future I will try a using an absolute  reference point to minimize the impact of the cumulative inaccuracies in relative measurements

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Starting from the left model: prototype, proof of concept, and the presentation model.

 

Journal 11-3-2015

Completed a 1 to 1 scale model that has meet my goal for movement and stability. I will adjust the lengths of the legs to account for the thickness of the plywood. I need to lengthen the track so that the truck I plan on constructing a model for presentation. while I was not able to construct a full trapdoor for the theater, I can make design a CAD files and shop orders for a future build of this project, if someone wants to take up my project.

 

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This is the frame to stand in for the thickness of the platform

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CAD Designs and notes while building.

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Squaring up the frame is important for symmetrical movement in the legs.

 

Journal 9/18 test model

This is a model based on the sunroof cassette. The end of the track is level with the stage deck while the other end is lifted up with a set of levers.

Like the patents, this design uses the the same force that moves it forward to prop the arms up and change the angel  of the platform when it reaches the end of its track.

I still want to find a way to have a physical lock that can be done and undone by the same cylinder that move the platform. I want to have a structure that can remain safe should the pneumatic or hydraulic cylinder loses pressure.

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Automated Trapdoor Proposal

Automated trapdoor proposal

 

Who am I :

I am Andrew Ng, a senior Entertainment Technology major specializing in Lighting and Technical Direction. I have 6 year of experience participating and mentoring in FIRST Robotics, and I want to work with automation, AutoCAD design, problem solving, and special effects. I will be the project manager and master carpenter for my project. I will be working with John McCullough to design and construct a life sized model to demonstrate proof of concept.

The Automated trapdoor 

The automated trapdoor will be able to work with a  trisket and stud wall platform deck for the theater. It can be triggered remotely from backstage or a control booth by actuating a piston with pneumatic or hydraulic power. It will create an opening in the platform that can allow access to elements under the deck.

Issues to address :

  • Structural Safety
  • Construction
  • time
  • automation safety
  • automation mechanism
  • Power
  • parts and parameters

Solutions :

I will draft a design and make models to test mechanisms for the trapdoor. I will find parts and either obtain or build a proxy for the model. The project will be broken down into phases that should be more manageable. When concept model is put together a can-locking mechanism can be designed. I plan on using physical relays or a deadman switch and e-stop to prevent the trap door from closing on people.

Table of content :

  • Abstract
  • introduction
  • timeline, calendar
  • budget
  • inventory
  • data collection
  • summary
  • Conclusion
  • bibliography

Process Model of completion 

-Plan for work and Time table

 

Rough Calendar 

  • Weeks 1 – 3
  • Planning, Research, design, and modeling
  • Weeks 4 – 6
  • Prototyping, refinement, networking, revise budget, and ordering parts
  • Weeks 7 – 9
  • Control, safety, custom work, CNC routing, controls and safety
  • Weeks 10 – 12
  • Final model, painting, wires, cables.
  • Weeks 13 – 15
  • PowerPoint, paperwork, poster, presentation,

Rough budget 

Lumber                                           100

Fasteners                                          20

Software                                          800

Consumables                                   30

Sensors                                           250

Motors and pneumatics               400

Tubes and cables                            50

 

Design cycle 

  1. Design / Revise
  2. Incubate
  3. Execute
  4. Reflect

Refinement 

-Stretch goals 

  • Sensors and e-stop
  • manual controls
  • load test and Working Load Limit numbers

List Outcomes 

…

Resources 

  • (Internet sources )
  • (Professors  )
  • (Books )
  • (Public domain )

 

Document  Link  >>Here<<