1. Team #55 Reflow Oven Project Manager: Patrick Selzer (ME) Team Members: Michael Ladd (ME), Patrick Mooney (EE), Corey Seidel (EE)

2. Executive Summary Problem Statement  Small scale solder ovens sacrifice quality and precision for cost.

3. Executive Summary Deliverables

4. Executive Summary Team Responsibilities  Control System (CS)  User Interface (PM)  Heating System (PS/ML)  Cooling System (PS/ML)

5. Executive Summary Resources  $200.00  Oven by Mar. 14 th  Profiles and Testing Data by Apr. 28th

6. Market Outlook Professional Models  Expensive  Precise performance data  Accurate temperature control  Higher reliability  Faster cycle times ModelCostCycle TimeUser InterfaceControl UnitSolder Area Heating Element T962A$369.998 min B/W with function buttons Micro-processor300 x320 mmInfrared T962$429.498 min LCD display with function buttons Micro-processor (Self- Contained) 180 x 235 mmInfrared T962C$799.008 min LCD display with function buttons Micro-processor (Self- Contained) 400 x 600 mmInfrared AS-5060$850.00N/A B/W with function buttons Micro-processor460 x 275 mmInfrared 2011 D.A$2950.005 min B/W with function buttons Control Unit with EPROM 400 x 350 mmConvection BT300CP$1249.996 min B/W with function buttons PID control230 x 370 mmConvection 850$1499.995.5 min B/W with function buttons PID control340 x 430 mmConvection GF-B-HT$999.997 min B/W with function buttons Micro-processor305 x305 mmConvection GF-C^2-HT$799.997 minComputer out Outside Computer 305 x 305 mmConvection HHL3000$1059.006 minB/W with function buttons Micro-processor360 x 385 mmConvection

7. Market Outlook Do-It-Yourself (DIY) Ovens  Cheap  No performance data  Untested reliability  Higher cycle times Build After Oven Cost ($) AutomaticControl Temperature Uniformity Ease of Use Ease of Build Spectrum154.00YesGoodFairGoodFair Freetronics70.00NoPoor Very Good Instructables120.00YesGoodPoorGoodFair Die4laser148.00YesGoodPoorGood Mad-science85.00YesFairPoorGoodVery Good

8. Market Outlook Target Markets  Small Business  Reliable  High Performance  Tighter constraints  Low cost  Lower cycle times  Home Hobbyist  Versatile  Ease of use  Low cost

9. Specifications  User Interface  <$50 CPU  Digital Display  Profile Library  Control System  2% overshoot  Thermal Profile  Base profile of low ramp-up rate, low peak, high ramp-down rate  Calibrated with respect to solder, flux, oven

11. Block Diagram

12. Temperature Profiles  Profile Types  Ramp to Spike  Ramp, Soak, Spike  Low Void Profile  Eliminating Defects  Heating Rate 3°C/s  Cooling Rate of -4°C/s  Time above liquidus 30-60 sec

13. Heating and Cooling Systems  Resistive heating element  Max oven temperature of 300°C  Internal Convection Fan  79 ft 3 /min  120 mm  Aluminum  External Vents  Solenoid controlled  In-line with convection fan.

14. Control System  Arduino  Temperature= User Input – Actual Temperature  Applies corrections to within 2%  Output pulse width modulated signal  MOSFET bridge  Act as solid state relay  High-current switching operation  Expandability  Modular to accommodate future expansion

15. User Interface  Arduino TFT digital display  Standard 4 buttons  Arrange buttons to proximity of text  Up to 12 buttons available  Stop button integrated

17. Action Item List (AIL) ActivityPersonAssignedDue Acquire OvenML1/131/20 Stock-oven ExperimentsAll1/202/3 Install vent and fanPS/ML1/272/10 Implement ControlCS2/102/24 Install User InterfacePM2/103/3 Synchronize subsystemsALL2/173/10 FEA heat flux analysisML/PS2/243/17 Solder TestingAll3/103/31 Compile Temp. ProfilesAll3/174/28 Perfect DeviceAll3/314/28 Document DesignAll4/75/5

18. Resources PartItemQuantityPriceCostTotal 1Black and Decker Toaster Oven1$40.00 2Arduino Duo1$43.00 $83.00 3Arduino TFT1$26.00 $109.00 4Solenoid2$7.00$14.00$123.00 5Computer Fan1$8.00 $131.00 6Wire-On Hand $131.00 7Buttons-On Hand $131.00 8Solder-On Hand $131.00 9Thermistor10$1.00$10.00$141.00 10Super Glue1$2.00 $143.00 11Metal Sheeting-On Hand 12Arduino Software On Hand 13Contingency1$57.00 $200.00 Total:$200.00

19. Conclusion  Modify Standard Convection Oven  Arduino Board  External Vents  Internal Fan  User Interface  Objectives  Reach 300°C  Heating Rate 3°C/s  Cooling Rate of -4°C/s  Questions?