From DDL Wiki

Revision as of 00:10, 24 January 2007

"Shredder (sometimes The Shredder) is a fictional character in the Teenage Mutant Ninja Turtles universe. He is a villainous ninjutsu master called Oroku Saki who, at one point or another in every incarnation of the TMNT franchise, has been the main enemy of Splinter and the Turtles." http://en.wikipedia.org/wiki/Shredder_(TMNT)

"Shredder (sometimes The Shredder) is a fictional character in the Teenage Mutant Ninja Turtles universe. He is a villainous ninjutsu master called Oroku Saki who, at one point or another in every incarnation of the TMNT franchise, has been the main enemy of Splinter and the Turtles."
http://en.wikipedia.org/wiki/Shredder_(TMNT)

Product Dissection

The following notes were taken prior to and during product dissection.

Function/Purpose:

Shreds paper or credit cards placed correctly into feeder

• Increase security – not able to easily retrieve information from shredded items
• Facilitate disposal – reduce volume of garbage
• Produce confetti
• Substitute for a recycling bin

Inputs/Outputs:

• Material Inputs: Paper, Staples, Credit Cards
• Information Inputs: Direction of motor rotation
• Energy Inputs: 120V AC
• Material Outputs: Shredded material inputs
• Information Outputs: Operation status
• Energy Outputs: Heat, Noise, Light

Use:

1. Scale moved to where weighing takes place (ground) - NOTE: Shaking – noise made
2. Observed zero reading of dial (does it need calibrating)
3. Calibration – locate calibration dial, turn dial until zero lines up with red line
4. Steping on the scale

• Orientation of the feet around the dial window
• Even distribution of weight
• One foot first, then the full weight

5. Wait for dial to reach equilibrium
6. Read the number that lines up with the red line

Different Users / Use Scenarios

• Weighing objects
• Balance difficult in stepping
• Weight beyond capacity
• Body shape in the line of vision
• Different eyesight
• Lighting
• Flat surface
• Calibration tasks, difficult for Parkinsons, limited hand-eye coordination

Functional Operation:

1. Force applied to cover
2. Angle brackets transfer force to levers
3. Levers amplify the force and transfer to the spring plate
4. Spring compresses proportionally to the force applied
5. Pivot transfers vertical motion of the spring plate to the horizontal motion of the rack (amplifies as well)
6. Rack and pinion translates linear motion into rotational motion
7. Rotational motion is read out on the dial