Lab+7


 * Meeting Notes October 25, 2006**

People had problem understanding the twist and turn motion Ergonomics not there Relocate the buttons for a more intuitive turning motion
 * Gripper Feedback**

Customer interaction limited Coaster brake cool
 * Wheelchair Feedback**

Major: Ergonomics Packaging, size Drive mechanism Customer acceptance (all people Brentan interviewed has mild arthritis and wasn’t too enthusiastic about using this device)
 * Gripper Remaining Questions**

Minor: Gearing Why powered? Two way functionality

Can you drive it backwards – yes but with a separate rim Go back to beginning and try to redesign for new specifications Lose coaster brake or lose backwards functionality Hub that brakes and switches gears at the same time Way we mounted the wheels might need to be changed… probably can’t use spokes, need actual wheelchair wheel. All the weight is put on one side of the hub Directionality
 * Wheelchair Remaining Questions**

Major: Backwards driveability Hub directionality

Minor: Hub-wheel interface Hub-chair interface Master shifter?

Wheelchair Magic wheels (we can shift on the fly) Knob Handler Strap wrench Door plastic thingy (standard knobs ~ 2in in
 * What is our closest competitor?**

Technical questions severity Time for a conclusive answer? Marketability Need Fulfillment Scope of class (too simple, too complex) Processes (injection mold?) Benchmarking / Competitors Design Resolution
 * Define Selection Criteria**

Knob: 19.5 - 26
 * Strawpoll totals**
 * //Wheelchair: 34.5 - 30//** (wins)


 * **//Best case scenarios.......//** || GW......... || KH ||
 * Need || O || ? ||
 * Fulfillment || + || + ||
 * Risks || O || + ||
 * Distinction || + || + ||
 * Distinction || + || + ||

Ok we are working on the wheelchair 9:05

5 minute break

Modularity – where the problems will be You want to decompose everything into modules, but need to define interfaces Assign person on each module to be responsible for the interface Try to do decomposition (how many people do each part) Do a chart that connects each module to its interface Assembly Review Discussion Due Nov 3
 * Warren****:**

Tech Review Nov 20


 * Product Architecture Decisions:**
 * Fixed gear (backwards drivability) vs. coasting wheel / coaster brake 2 Adam, Jin
 * Rim interface 2 Taylor, Erik
 * Gear ratio 4:3 not substantial enough? (bench-top experiments) 2 Harmeet, Zack
 * Availability / manufacturability / hub directionality (can we find a mirror hub?) 2 Aaron, Dave
 * Uphill forward only feature 2 Mario, Moneer
 * Shifter Interface, Coaster brake stiffness 2 Brentan, Phil
 * Overall ergonomics (integration) 2 Logan, Myoung

By Sunday key decisions are made