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FTC Build a Better Robot

FTC Build a Better Robot. Cougar Robotics 4251. Design Principles and Strategies. Design Principles and Strategies . KISS Keep It Super Simple Tool Design First Leapfrog Development Never go backwards Repetitive Testing Repetitive Testing Repetitive Testing Repetitive Testing

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FTC Build a Better Robot

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  1. FTC Build a Better Robot Cougar Robotics 4251

  2. Design Principles and Strategies

  3. Design Principles and Strategies • KISS • Keep It Super Simple • Tool Design First • Leapfrog Development • Never go backwards • Repetitive Testing • Repetitive Testing • Repetitive Testing • Repetitive Testing • Competitive Development

  4. Practical Applications

  5. Chassis/Drivetrain • Stiff & Stable Frame • Maneuverability • Rocker in a 6 wheel tank-drive chassis • Omni wheels on corners or one end • Ability to go where you want/need to for the game • Going the right speed • Practice driving before the tournament • Be prepared to drive on all parts of the field

  6. Other • Isolate your motors from impacts • Torque > Traction • Mechanical Alignment • 8 motors, 3 lego motors, 12 servos

  7. Motor Power Table

  8. Double Drilled vs Regular

  9. Tools, and Using them • Color coding tools • Good mechanics have their own tools • Removing cross-threaded machine screws • Vice grips • Drill out • Removing rounded out machine screws • Vice grips • Easy outs

  10. Building Practices • Keeping screws and set screws in • Nylocks • Lock-tite and pre-nylon threaded set screws • Don’t transmit loads thru axles • Understanding friction/traction • Surface area doesn’t change friction • F=µFn • Components under tension & compression

  11. Regular Wheel With Sprocket

  12. Calculating Loads on Lever Arms • Margin of Safety • At least a 2:1 • Exercise • Use a lever arm on your robot or make one including: • A DC motor • At least one gear change • A lever arm on the end • Using your setup, calculate the reasonable max weight your lever arm could elevate

  13. Custom Parts

  14. CAD Programs • PTC Creo Pro • Autodesk Inventor • Gear Generator • http://woodgears.ca/gear/index.html

  15. Tools • Laser Cutter • CNC Machine • Sheet Metal Shear • Metal • Polycarb and PETG • Sheet Metal Brake • Machine Lathe

  16. Steel and Plastic • When to use steel • Your best plastics • PETG • Delrin • Polycarbonate

  17. 3D Printing • When to print your own parts • Web order 3D printing (Shapeways) • Some companies can print steel

  18. Useful Websites • Official Game Forum • http://ftcforum.usfirst.org/forum.php • Chief Delphi • http://www.chiefdelphi.com/forums/forumdisplay.php?f=146 • ROBOTC Forum • http://www.robotc.net/forums/viewforum.php?f=52 • Xander Soldaat • http://botbench.com/blog/ • Cougar Robotics • http://cougarrobot.com/ • Landroids • http://landroids.org

  19. More Useful Websites • Hitechnic • http://www.hitechnic.com/ • Lego Education • http://www.legoeducation.us/ • Digikey • http://www.digikey.com/ • McMaster-Carr • http://www.mcmaster.com/#

  20. Contact Information • Coach Jamie- coach@cougarrobot.com • Coach Judy- scientist@cougarrobot.com • Kids- • joey@cougarrobot.com • evan@cougarrobot.com • sean@cougarrobot.com • nathan@cougarrobot.com • reeve@cougarrobot.com

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