Team 04 Introduction Prototypes Circuit System Mechanical Design - PowerPoint PPT Presentation

Team 04 Introduction ○ Prototypes ○ Circuit System ○ Mechanical Design ○ Conclusion 1 of 12

Team Maddie Collins Daniel Dick Daniel Wharton Kyle Mailhot Introduction ○ Prototypes ○ Circuit System ○ Mechanical Design ○ Conclusion 2 of 12

Contents Introduction Design Description » Circuit System » Test Bed » Mechanical System Prototype Testing Final Design » Description » Results Business and Market Analysis Conclusion Introduction ○ Prototypes ○ Circuit System ○ Mechanical Design ○ Conclusion 3 of 12

Introduction Problem » High number of annual shop accidents Key Design Considerations » Size of Design » Stopping Time and Depth of Cut » Electrical and Mechanical Components » Safety and Test Bed Development Introduction ○ Prototypes ○ Circuit System ○ Mechanical Design ○ Conclusion 4 of 12

Circuit System – Firing Circuit Capacitor Clip for Wire Manual Switch Introduction ○ Prototypes ○ Circuit System ○ Mechanical Design ○ Conclusion 7 of 12

Circuit System – Sensing Circuit Transistor Comparitor Potentiometer Op Amp Introduction ○ Prototypes ○ Circuit System ○ Mechanical Design ○ Conclusion 8 of 12

Test Bed Rev 01 Rev 03 Rev 02 Introduction ○ Prototypes ○ Circuit System ○ Mechanical Design ○ Conclusion 5 of 12

Prototype Testing Test 1 Test 3 Housing Design • • Thinner Brake Design Brake Design Sensing Circuit and Firing Circuit Combined • • • Firing Circuit Shaft Modifications • Test 2 Test 4 New Housing Annealed Brake • • Design Modified Circuitry • Firing Circuit • Modifications Introduction ○ Prototypes ○ Circuit System ○ Mechanical Design ○ Conclusion 6 of 12

Final Design Aluminum Brake Inside Brake Housing Outside Brake Housing Introduction ○ Prototypes ○ Circuit System ○ Mechanical Design ○ Conclusion 9 of 12

Mechanical System

Final Design

Final Design

Final Design Results » Mechanical Stopping Time of 0.003 seconds » Depth of 3 mm Cut in Hot Dog » Force Down 15 lbf (Deflected 2 inch in test) Reflections » Successful mechanical design early on » Sensing circuit difficulties

Business and Market Analysis Market Analysis Business Analysis Item Cost per Unit Assumptions  High end Miter Saws  Units are made with Total Circuitry System $ 34.31  Business or learning our design applications  1000 units are made Total Mechanical $ 12.20  OSHA estimates a cost of per year System $130,000 to a business for  $15/hr labor wage Labor and Installation an amputation*  30% overhead $ 97.50 Cost  Average index finger cost $24,474** Overhead Cost $ 61.72 *http://www.sawstop.com/why-sawstop/accident-victims **http://www.na.kccustomerportal.com/Documents/Uploa d/Application/2811/Learning%20Center/Article/K2750_0 Total (Breakeven Cost) $ 205.73 9_01_If_You_Think_Safety_is_Expensive_FINAL.pdf https://projects.propublica.org/graphics/workers- compensation-benefits-by-limb Introduction ○ Prototypes ○ Circuit System ○ Mechanical Design ○ Conclusion 10 of 12

Questions? Special Thanks to: ◦ Professor VanAntwerp – team advisor ◦ Professor Michmerhuizen – circuit design ◦ Chuck Holwerda – electronics assistance ◦ Phil Jasperse – shop supervision Introduction ○ Prototypes ○ Circuit System ○ Mechanical Design ○ Conclusion 12 of 12