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Office of the Dean of Students Automated Bookshelf (ABS) Design Review

Office of the Dean of Students Automated Bookshelf (ABS) Design Review. February 25, 2010 ARMS 1098-C. ODOS. Team Introduction. ODOS. Team Leader Ed Brown – Junior, EET Team Members Nathan Myers – Sophomore, EET Ben Ross – Junior, CE Lisa Li – Junior, EE. Community Need. ODOS.

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Office of the Dean of Students Automated Bookshelf (ABS) Design Review

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  1. Office of the Dean of StudentsAutomated Bookshelf (ABS)Design Review February 25, 2010 ARMS 1098-C ODOS

  2. Team Introduction ODOS • Team Leader • Ed Brown – Junior, EET • Team Members • Nathan Myers – Sophomore, EET • Ben Ross – Junior, CE • Lisa Li – Junior, EE

  3. Community Need ODOS • How does this help • Disabled student in wheelchair was having problems storing his books on his bookshelf • How has the design changed • Started out with linear model • X and Y movement would be necessary • User characteristics considered in design • Reach considerations • Weight considerations • Why the need should be addressed • Model for other groups • Ease of use

  4. Goals of the ABS ODOS • What aspects of the need will the project address? • Ease of use, control and replication • Design with the user in mind • Design for a 200 pound shelf load capacity • Fit ADA Standards for reach-ability • A finished prototype

  5. Project History Old ABS design ODOS • Origins of project • Has been around since Spring 2006 at least • Existing design idea • Movement in y-direction only • Outdated circuitry • Design and size do not fit current design criteria

  6. Project History • Stationary Unit • Moving Shelf Section • Track Actuator • Rails • Sensors • Shelf Stabilizers 3 1 2 4 5 6 ODOS • Overview of old prototype • Shelf is attached to a track actuator mounted behind the moving section

  7. Project History Where we come in Top: 200 lb actuator Bottom: 400 lb actuator ODOS • Last semester • Designs were considered • 1:4 scale prototypes were built • Actuator Discussions • 200 lb and 400 lb actuators • 200 is design load • 400 is too slow • Prototypes were tested for design • A full scale model of the shelf was built • No moving parts • Wood only

  8. What have we done? ODOS Design considerations 1:4 scale prototypes built Full scale model in construction Design requirements Design considerations

  9. Our Decision ODOS • Actuator System • We tore apart the old prototype model for parts • Began to build full scale prototype with foam board • We came across some issues in the process • The challenges we encountered helped us to come up with a new decision.

  10. Revelations ODOS • Force ratio required to life Actuator model would be about 800 pounds • Unrealistic and pricey • Combination of models • New model will be a “double actuator” • Similar to the claw vending machines • Allows for small movement in the X direction and 37” of movement in y direction (to shelf edge and floor)

  11. New Design Idea • Second half of the semester focused on a 4 way x-y design • Used 2 different types of actuators • New design moves bookshelf in 2 directions • Provides most space and is a simple design • Bookshelf itself will have to be modified • There will be approximately 8 inches cut off of the shelf ODOS

  12. Parts ODOS • Needed a small actuator to push shelf out • Small 12 inch stroke actuator • 100 pound capacity (more than enough) • Drawer Slides • For up and down movement • 24 inch stroke, 200 pound capacity

  13. Shelf Movement ODOS

  14. Shelf MovementStability ODOS • As designed, there are stability problems • Designed “L Brackets” for connecting actuator and track system • Mild steel • Deigned as to screw through actuator • Designed steel plates for stability • Meant to connect shelf to tracks • So that all components can move as a system • 1020 mild steel

  15. Shelf MovementControls Controls ODOS • 2 total buttons for movement • One up, one down • Simple • Down makes the system go out and down • Vise versa for up • Originally ran into a 5 prong power source • This is not needed and can be modified accordingly

  16. Shelf MovementRelay Theory Relay Safety Switch Power Supply ODOS • What is a relay? • The relays govern the motion of the system • Connected to the power supply then to the system control • Also connected to safety system • Safety switches cut all power when triggered

  17. Shelf MovementRelay Theory ODOS

  18. Challenges ODOS • Project must be safe • No tipping • Must have at least a 200 pound capacity • Minimize pinch points • Must have a “kill switch” • No slipping points

  19. Challenges ODOS • Electrical issues • Previous team did not keep circuitry diagram • Outdated technology • Can be compressed- not a priority • Many components were not working properly • Actuator did not function • Bad connections in circuitry • Problem temporarily fixed

  20. Challenges ODOS

  21. Challenges System integration Efficient movement and storage of parts How to do integrate using one button for 2 directions Other problems

  22. What’s left? ODOS Safety Systems System Integration Delivery of Prototype User Manual Report

  23. Questions?

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