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Transcript of ES1050 – Introductory Engineering Design and Innovation Studio Practical Prototyping Prof. K....
ES1050 – Introductory Engineering Design and Innovation Studio
Practical Prototyping
Prof. K. McIsaac
Prototyping in the MDP
Part of the MDP is a development of the prototype.
This will play two roles:
•Prototypes are presented in the design showcase
•Prototypes are modeled and tested using
experiments you design
http://en.wikipedia.org/wiki/Prototype
Prototype Goals
When we introduced prototypes, we discussed the
following uses:
•Answer simple questions (will it work?)
•Obtain feedback from customers
•Aid in visualization
•Realistic models for marketing and advertising
•Study the look and feel of the product
•Functional testing and evaluation
Proof-of-concept Prototypes
Demonstrate feasibility Simple construction Often only a part or
subsystem Usually not fully
functional! Not sufficient for design
validation!
http://me118.stanford.edu/pictures/Win01Projects/TooShort/images/2nd%20prototype.JPG
Experimental Prototype Intended for
physical experiments and testing
Often only a subsystem
Prototype of shock-absorbing casterTest results
Prototype Goals
Focus on proof-of-concept and experimental prototypes It is not necessary to create something that does all of
what your project is about The goal is to create something you can test and model
that illustrates a key part of the project Make sure your prototype fits within your skill set
An illustrative example
Last year’s theme was “improve student life”. One of
my studio teams wanted to make the automated
breakfast maker:
1.Could be set on a timer
2.Would start making toast at a set time
3.A robot arm would remove the toast and move it to a
conveyor
4.A syringe would extrude jam onto the toast
5.A spreader would spread the jam evenly
Some problems
1. AC power is dangerous (banned) and difficult to
work with
2. Robot arms are expensive and complex
3. Conveyor belts are expensive and hard to build
yourself
4. How to make a powered jam syringe?
5. The team had limited software skills. How to
program and synchronize all these operations?
Some solutions!
1. Just plug in the toaster to a power bar, then use
the power bar’s ON switch instead of a timer
2. Tip the toaster on a ramp so the toast just falls out
3. Instead of a conveyor belt, buy an old record
player at the surplus store
4. The “jam syringe” was a metal can with a plunger
and a hole cut in the bottom
5. Synchronize by hand
Modeling and experimentation
What to test and model in all this?
• Torque and power requirements to lift the toaster?
• Torque and power requirements to smear the jam?
• Others?
Prototype Construction in ES1050
Inexpensive Easy No special
tools Quick
http://www.ben.com/LEGO/rcx/picoscout/breadboard.jpg
Common Prototyping Materials in ES1050 Wood Plastic
Plexiglass Cardboard and
paper Metal
http://www.riscx.com/pyramac/proto_pics/proto_3_600.jpg
Prototyping Tools in ES1050
Simple hand tools Scissors Screwdrivers Wrenches
Simple joining methods Glue Duct tape Screws
Construction kits you may want to use in ES1050 Lego Meccano Others
http://www.sentex.net/~mwandel/legos/legos.html
Lego Many mechanical
and electrical parts
Inexpensive and easy
No tools required
http://www.hamster.dk/~purple/robot/iBOT/lego_robot_prototype.jpg
http://www.cs.rhul.ac.uk/eca/micromouse/lego/shakey/images/parts.jpg
Meccano Uses metal parts Simple tools
www.meccano.com
http://webperso.easyconnect.fr/esteve.jeanmax/j.e.o/fotopi%E8ces/MarklinPiecP.jpg
UMS Machine Shop Support
Scrap, off-cut materials One hour of machining/consulting time
(consult with TA A. Ho to set this up) Rapid Prototyping (Fused Deposition
Modeling only) Be careful of what you spend!
Workshop Facility
There is student design space in CMLP (only qualified people can use the machine tools)
We are working to have it ready It would include hand tools and benches
only All of these resources are limited so don’t
wait too long!