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ORTOP

This workshop is designed for rookie and experienced coaches/mentors to provide immediately usable material for their teams and gain Mindstorms NXT programming experience. It aims to introduce Oregon's youth to the world of science and technology.

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ORTOP

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  1. ORTOP NXT Robotics Techniques Workshop 2007 “Opening doors to the worlds of science and technology for Oregon’s youth” NXT Robotics Techniques - 2007

  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 2006 tournament. NXT Robotics Techniques - 2007

  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 - 2007

  4. Agenda • Introductions (5 min) • Slide Review (20 min) • Break into Teams • NXT Techniques lab exercises (90 min) • Review & questions NXT Robotics Techniques - 2007

  5. Agenda • Handouts for this workshop: • TechniquesNXT2007V2.ppt (this slide set) • TechniquesNXT2007LabsV2.doc (lab exercises) • NXT WorkshopCD2007Vx.y • NXT Workshop materials • MindstormsNXT Tutorial by Dale Yocum • INSciTE NXT Programming manual, from High Tech Kids • Selected videos of 06 State Championships NXT Robotics Techniques - 2007

  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 - 2007

  7. NXT Basics LEGO Parts Identification • Have kids inventory your NXT kit & get to know the parts • Use pins and various Technic parts to build your robot. Pins are stronger than original LEGO bricks with bumps. NXT Robotics Techniques - 2007

  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 - 2007

  9. NXT Basics • Gears • Spur Gear (show example) • instructor holds beam • class person turns axles and feels torque on other axle • tactile feedback = learning about gears and torque • Gear Ratio and Speed • turn large gear one complete turn. How may times does small gear turn? NXT Robotics Techniques - 2007

  10. NXT Basics • Torque • can be thought of as rotational force • torque causes something with mass to rotate • a force can create a torque by acting through a moment arm (picture a wrench turning a bolt) • a motor produces a torque – transferred to gears and to axles that turn the wheels • gears change speed and torque • e.g. changing bicycle gears to go up a hill NXT Robotics Techniques - 2007

  11. NXT Basics • More Gears • Worm Gears • one way transfer of power (show example) • Pulleys • use for slippage during lifting • Clutch • slippage after torque value listed on clutch • GS Day Camp pages on gears • instructor hold up 3 page handout NXT Robotics Techniques - 2007

  12. NXT Basics • 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 - 2007

  13. NXT Basics - Motors • Note holes for Axles and Cams • One Move block in the program controls both motors • The robot moves straight - motors will adjust speed as the robot moves • A program with two Move blocks (one for each motor) will not go straight… • Try programming tests for straight and curved movements, single and multiple Move blocks NXT Robotics Techniques - 2007

  14. 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 • 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 - 2007

  15. 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 - 2007

  16. 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 for better memory usage • 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 - 2007

  17. 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 - 2007

  18. NXT Basics – Lab Exercises • Lab Sections • Lab 1 - The Distance Sensor • Lab 2 – Data Hubs & Variables • This exercise shows 4 different techniques to program the robot to go in a square • Lab 3 - Switches & Range Blocks • Advanced lab - Light sensor calibration NXT Robotics Techniques - 2007

  19. NXT Basics – Lab Exercises • Show video: examples of robots with fixtures for each mission • 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 - 2007

  20. 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 - 2007

  21. 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 - 2007

  22. 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 - 2007

  23. Information • Resources • Inscite www.hightechkids.org • Google “FLL programming” and look for FLL programming 101 N .pdf • This file is on the NXT workshop CD NXT Robotics Techniques - 2007

  24. Parting Thoughts • From “All I Really Need to Know (About Creative Thinking) I Learned (By Studying How Children Learn) in Kindergarten* Tips from 12 year olds on being creative: • Start simple • Work on things that you like • If you have no clue what to do, fiddle around • Don’t be afraid to experiment • Find a friend to work with, share ideas! • It’s OK to copy stuff (to give you an idea) • Keep your ideas in a sketch book • Build, take apart, rebuild • Lots of things can go wrong, stick with it *MIT Media Lab NXT Robotics Techniques - 2007

  25. Review & Questions • Please give us your input • Let ORTOP know how we can improve the program • Thanks for volunteering, your effort makes learning possible! • Disassemble robots and put pieces back into kits NXT Robotics Techniques - 2007

  26. 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 - 2007

  27. 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 - 2007

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