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ORTOP

ORTOP. NXT Robotics Techniques Workshop 2006 “Opening doors to the worlds of science and technology for Oregon’s youth”. Goals. Audience: Rookie coaches/mentors, experienced coaches & mentors Provide Material That Is Immediately Usable With Your Team

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  1. ORTOP NXT Robotics Techniques Workshop 2006 “Opening doors to the worlds of science and technology for Oregon’s youth” NXT Robotics Techniques - 2006

  2. Goals • Audience: Rookie coaches/mentors, experienced coaches & mentors • Provide Material That Is Immediately Usable With Your Team • Gain Mindstorms NXT Programming Experience • You should have already attended NXT workshops I & II and/or coached a team in a 2005 tournament. NXT Robotics Techniques - 2006

  3. Instructor Contacts • Ken Cone • kcone@hevanet.com • 503-292-0920 • Leroy Nuckles • leroy.a.nuckles@intel.com • 503-264-2088 • Jim Ryan • james.r.ryan@intel.com • 971-225-6087 • Scott Stanko • scott.stanko@intel.com • 971-215-9677 • Roger Swanson • swanson@hevanet.com • 503-297-1824 • Cathy Swider • Cathy_swider@ous.edu • 503-725-2920 NXT Robotics Techniques - 2006

  4. Agenda • Introductions (5 min) • Slide Review (20 min) • Break into Teams • NXT Techniques lab exercises (90 min) • Review References (10 min) NXT Robotics Techniques - 2006

  5. Agenda • Handouts for this workshop: • NXT_RTechniques2006V1.ppt (this slide set) • NXT_RTechLab2006V1.doc (lab exercises) • NXT WorkshopCD2006V3.2 • NXT Workshop materials • MindstormsNXT Tutorial by Dale Yocum • INSciTE NXT Programming manual, from High Tech Kids NXT Robotics Techniques - 2006

  6. Our Mission • FLL is not just about building robots and competing in tournaments • Develop team member skills • technical • team building • research & presentation • Technical problem solving can be fun • The youngsters do the work • Introduce possibility of a technical career NXT Robotics Techniques - 2006

  7. NXT Basics LEGO Parts Identification • Technic Liftarm 2x4 L shape • Technic Liftarm 1x5, 1x7 • Technic Liftarm 3x5 L shape • Technic Liftarm 1x9 Bent • Technic Pin Joiner Dual • Axles & Pins • Have kids inventory your NXT kit & get to know the parts NXT Robotics Techniques - 2006

  8. NXT Basics • Note how NXT parts are all pinned together using Technic parts • There are only a few plates with bumps • Motors are strong enough for direct drive – turn a wheel on your robot to feel the gears • Motors have built in rotation sensors – programmed in degrees or rotations • Take a minute to examine the NXT parts and motors NXT Robotics Techniques - 2006

  9. NXT Basics – Parts Pinned Together NXT Robotics Techniques - 2006

  10. NXT Basics - Brick • 3 Output ports on top • USB port on top • 4 Input ports on bottom • Enter button (orange) • Back button (black) • Left & Right cursor buttons (grey) • Screen shows program icons • Push the Enter button, what happens? • Take a minute to examine the NXT brick NXT Robotics Techniques - 2006

  11. NXT Basics - Brick Back NXT Robotics Techniques - 2006

  12. NXT Basics - Brick • Firmware & programs stored in flash (like photos on a digital camera) • Default inputs: • touch = 1, light = 3, Distance = 4 • Allowed: 2 touch, 2 light, 1 Distance • Default outputs: • Left motor = C, right motor = B • Allowed: 3 motors (rotation sensors built in) • Allowed: (3 - number of motors) rotation sensors NXT Robotics Techniques - 2006

  13. NXT Basics - Brick • The NXT Screen • Shows My Files after power on • Orange “Enter” button • “Back” button below Enter • Left & Right “Cursor” buttons • Take a minute now, press the enter key, then navigate through the files • Turn the NXT off by pressing Back several times until NXT asks “turn off” • Confirm with Enter • Each team member should try this NXT Robotics Techniques - 2006

  14. NXT Basics - Motors • Forward is Clockwise on an NXT motor • Note holes for Axles and Cams • A Move block in the program controls both motors • The robot moves straight - motors will adjust speed as the robot moves • Recommend programming tests for straight and curved movements, single and multiple Move blocks NXT Robotics Techniques - 2006

  15. NXT Basics – Light Sensor • Reads reflection from a built-in IR emitter - (the sensor responds to visible light and into the IR spectrum) (default mode) • Or, reads light intensity from surroundings with emitter turned off • A Calibration procedure is available to accommodate variable lighting conditions NXT Robotics Techniques - 2006

  16. NXT Basics – Light Sensors NXT Robotics Techniques - 2006

  17. NXT Basics – Light Sensors • Calibration “normalizes” the max value to 100% and the min value to 0% • Mid values e.g. green are also affected by calibration • Be sure to deselect/select the light sensor block to get correct readings • Click “default” in calibration window to return to default values • Use NXT Brick View program or Sensor feedback box to read Black, Green, White values as in previous workshops • The sensor feedback box (located in the configuration panel) displays the current light reading (0-100%). You can use it to try out different trigger values. NXT Robotics Techniques - 2006

  18. NXT Basics - Sensors • Touch sensor • Responds to being pressed, or released, or bumped (pressed then released) • Note axle slot for extending sensor capability • Click “More help?” in lower right corner of Mindstorms screen. This works like Show Context Help in ROBOLAB NXT Robotics Techniques - 2006

  19. NXT Basics – Program Memory • Maximum available memory is ~125KB • Firmware refresh and all files deleted • Each program is ~0.1KB overhead • E.g. Move block ~5.1KB, two ~5.8KB • E.g. Move + Wait for light sensor ~7.7KB • Use My Blocks for subroutines • Click NXT Window then Memory to view memory usage • Instructor show this command • Refer to NXTmemory.doc for more details • Instructor, show this file NXT Robotics Techniques - 2006

  20. NXT Basics – Programming • Open Mindstorms NXT, Close the Robo Center • Find “Start New Program” – type “move1” and “Go>>”. • Click the Move block (gears) – note white box • Move mouse so white box is in Start square • Click to drop the Move block in Start square • Click hour glass Wait block, slide mouse to right and click Touch sensor – move to position to right of Move block. • Use Esc key to undo a command • Use Delete key to delete a block NXT Robotics Techniques - 2006

  21. NXT Basics – Lab Exercises • Lab Sections – decide where to start • Lab 1 – Light sensor calibration • Lab 2 – Can-Do Challenge • Lab 3 - The Distance sensor • Lab 4 – 5 – Data Hubs & Variables • Lab 6 – Switches & Range Blocks NXT Robotics Techniques - 2006

  22. NXT Basics – Lab Exercises • Introduce yourself to other team members • Begin with Lab1 exercise • Continue with as many labs as you can • 90 min to complete the labs • Ask questions, chances are someone else has the same question • Have fun! NXT Robotics Techniques - 2006

  23. NXT Basics – • LAB Conclusions • Each team briefly explain a section of what you learned in this workshop • What advice would you have for a team starting out with NXT? • Teaching for understanding “creates challenging situations in which students test their knowledge by solving problems, building products, and giving performances or writing reports that synthesize thorough analysis of a topic, a concept, or an idea.” * NXT Robotics Techniques - 2006

  24. NXT Basics • Next Steps • NXT Robotics Techniques slides • NXT Techniques labs • Mindstorms NXT tutorial (show tutorial) • INSciTE tutorial • Build and test some robots • Test tracks • Oval track with hill • Make up your own exercises – stress basics NXT Robotics Techniques - 2006

  25. Programming Resources • Tutorials, Dale Yocum • On ORTOP CD or download from http://cgsinfo.catlin.edu/msrobotics/html/downloads.html • takes time, go through in sections • NXT Tutorial is also available online: http://www.ortop.org/NXT_Tutorial/ • Requires Adobe Macromedia Shockwave Player and high speed download connection NXT Robotics Techniques - 2006

  26. Programming Resources • ROBOLAB 2.9 for NXT • ROBOLAB 2.9 is good where there are a mix of RCXs and NXTs  • Mindstorms NXT is auto-formatting (no wiring) • ORTOP will not teach ROBOLAB 2.9 at this time NXT Robotics Techniques - 2006

  27. Information • Resources • Inscite www.hightechkids.org • Look for FLL programming 101 nxt g .pdf • This file is on the NXT workshop CD NXT Robotics Techniques - 2006

  28. Review & Wrap-up • Engineering is designing to constraints • Allow your teams the experience of developing a creative solution to solve a problem NXT Robotics Techniques - 2006

  29. Review & Wrap-up • Please give us your input • Let ORTOP know how we can improve the program • Thanks for volunteering, your effort makes learning possible! • Restore sensors to default location NXT Robotics Techniques - 2006

  30. Our Mailing Lists • Totally voluntary, and you can opt out • ortopvol • All volunteers • One way from ORTOP to our volunteers • We add you when you volunteer • ortopcm • Coaches and mentors • Communication among that group and with ORTOP • We add you when you complete a workshop NXT Robotics Techniques - 2006

  31. Contact Us • Website: www.ortop.org • Email: questions@ortop.org Scott Stanko answers the questions email • Phone: 503.725.2920 (Cathy Swider) or 503-725-2915 (Bruce Schafer) NXT Robotics Techniques - 2006

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