Vex 2
- 1. TEAM Zeb Smithson Jon Boyd Shane Sharp Corey Thomas “I got it made…”
- 3. What Is A VEX Robot? • A system comprised of various mechanical, electrical and software constituents • All parts are premade • Can be modified and manipulated • A budget robot made from a platform that enables students to learn and apply various STEM (Science, Technology, Engineering and Math) attributes.
- 5. Challenges • Closely related to the real life challenges engineers face every day • Challenges would end up governing how we would construct our system • We implemented various system and management processes to tackle these challenges
- 7. Time • 6 hours a day for 5 days • Additional work would be done on our own time without the physical robot to refer to. • Biggest challenge (in our opinion). • It was a race against time!
- 8. Resources • Us • Mentors (Technical, Software, Project lead, Project manager) • Limited, but Various vex materials • Any tools to help modify VEX materials
- 9. Budget • Governed by our project manager. • Determines the amount of materials and resources.
- 11. • Although the SDLC (System/software Development Life-cycle) model is tailored towards software and engineering, it can be used in a variety of fields aimed at accomplishing a specific goal. • Ours is the RSDLC (Robotics System Development Life-Cycle)
- 12. On your mark, get set…Go!
- 13. Objective “Build a robot from the ground up with VEX materials and program the robot to run autonomous to complete the challenge. The two teams will have the challenge to capture their flag and return to their starting positions.”
- 14. Design
- 16. Challenges • Conflicting Ideas • Limited materials • Lack of Experience
- 17. Solutions • Team effort - Constructive criticism, Patience, Respect • Competitors • Mentors =
- 19. Hermione
- 22. Build Challenges • Using the least amount of parts to cut down on cost, weight and time. • Gravity combine with weight posed problems on individual systems such as: Chassis, Axels & Capture lift • Create an efficient capture/lift system • Create an efficient and functional drive train
- 23. Solutions • Extended axels across chassis for reinforcement • Devised gears for capture/lift system along with drivetrain
- 24. Bill of Materials Bill Of Materials Total Sets Used Number Per Package Price Per Package Total $ MOTION 2-Wire Motor 269 4 1 12.99 51.96 Motor Controller 2 1 9.99 19.98 Gear Kit 3 2XL/4L/4M/4S 12.99 38.97 Rack Gear 1 16 19.99 19.99 4" Wheels 1 4 19.99 19.99 Drive Shafts 1 4 12" Shafts 8.96 8.96 Pillow Block Bearing & Lock bar Pack 1 6 Bearing/4 Lock 7.99 7.99 Bearing Flat, Delrin 3 10 4.99 14.97 Shaft Collar 4 16 10.49 41.96 Washer (Telfon) 1 25 4.95 4.95 Washer (Metal) 1 200 4.95 4.95 Spacers 8mm 2 20 2.99 5.98 Spacers 4.6mm 2 20 2.99 5.98 Structure L Beam 2x2x35 2 4 17.99 35.98 Chassis Rail 2x1x25 1 4 14.99 14.99 C Channel Rail 1x2x35 2 2 8.99 17.98 Slotted Angles (Slide Rails) 1 4 14.99 14.99 Single Bar 1x25 1 8 12.99 12.99 Gusset Pack 1 6 5.95 5.95 Screws 1in 1 100 9.99 9.99 Screws 1/2in 1 100 7.49 7.49 Screws 3/4in 1 100 9.99 9.99 Lock Nuts 1 100 3.99 3.99 Keep Nuts 1 100 2.99 2.99 Power 7.2v Robot Battery 1 1 29.99 29.99 Battery Charger 1 1 16.99 16.99 Sensors Line Tracker 1 3 39.99 39.99 Ultrasonic Range Finder 1 1 29.99 29.99 Optical Shaft Encoders 1 2 19.99 19.99 Bumper Switch 1 2 12.99 12.99 Logic PIC Micro-Controller v5.0 1 1 149.99 149.99 Easy C Disc 1 1 74.99 74.99 Programing Hardware Cable 1 1 49.99 49.99 Total = 808.87
- 25. Programming
- 26. Challenges • How to go from dead- reckoning to autonomous automation • Organizing functions to make our system work efficiently • Program avoid function to avoid objects • Inexperience with programming software
- 27. Solutions • Used trigonometry to guide our bot throughout course • Spread sheet
- 28. Testing
- 29. Challenges • Calibrate sensors • Calibrate gears • Clearance issues Mechanism • Lack of experience with software • Finding code that works • Distance calculations • Sensor calculations Program
- 31. Solutions • Trial and error Manually inputting data into functions • Calibration physically measuring line sensor data • More trigonometry Finding arc length of tires instead of dead-reckoning • Collaboration Pitching solutions to mentors team members along with the opposing team
- 32. Release/Play • Demonstrate how we, as a team, have integrated our STEM abilities • We expect our robot to function correctly autonomously • Reveal how difficult it is to create an autonomous system within a small time frame
- 33. Analyze • Reveal how we have been able to work together to create a fully functional system • Re-think our weaknesses and strong points as individual and a team • Re-think and find solutions to all faulty aspects of our system
- 34. ThankYou… Kumar and Mathabotics Katlin, Frank and the B2E program Our mentors: Alfonso, Ashley and Matt Everyone who encouraged us to pursue a path in engineering