1. February 25, 2010 ARMS 1098-C 1 ODOS

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

3.  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 3 ODOS

4.  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 4 ODOS

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  Origins of project Has been around since Spring 2006 at least Existing design idea  Movement in y-direction only  Outdated circuitry  Design and size do not fit current design criteria 5 ODOS Old ABS design

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

7.  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 7 ODOS Top: 200 lb actuator Bottom: 400 lb actuator

8.  Design considerations  1:4 scale prototypes built  Full scale model in construction  Design requirements  Design considerations 8 ODOS

9.  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. 9 ODOS

10.  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) 10 ODOS

11. 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.  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 ODOS

14.  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 ODOS

15.  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 Controls ODOS

16.  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 Safety Switch Relay Power Supply

17. ODOS

18. 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 18 ODOS Safety Switch Requirements Body Parts Laptop/computer screen Eyeglasses Small Electronics Printer Food and drink Watch/jewelry/keys Apparel General school supplies Switch Options Mat touch sensor Light curtain Laser/Infrared Sensor Micro Switches with Plate

19. 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 19 ODOS

20. 20 ODOS

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

22.  Safety Systems  System Integration  Delivery of Prototype  User Manual  Report 22 ODOS

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