Team Leader Ed Brown Junior, EET Team Members Nathan Myers
Sophomore, EET Ben Ross Junior, CE Lisa Li Junior, EE 2 ODOS
Slide 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
Slide 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
Slide 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Existing design idea Movement in y-direction only Outdated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
Slide 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
Slide 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
Slide 8
Design considerations 1:4 scale prototypes built Full scale
model in construction Design requirements Design considerations 8
ODOS
Slide 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
Slide 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
Slide 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
Slide 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
Slide 13
Slide 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
Slide 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
Slide 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
Slide 17
ODOS
Slide 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
Slide 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
Slide 20
20 ODOS
Slide 21
System integration Efficient movement and storage of parts How
to do integrate using one button for 2 directions Other
problems
Slide 22
Safety Systems System Integration Delivery of Prototype User
Manual Report 22 ODOS
