1. Capstone in Technology Tech 499 Department of Technological Studies College of Arts and Sciences Jordan Hites

2. Project Description Sumo robot being built for a Society of Manufacturing Engineers’ National robotics Challenge. Location: Marion Ohio County Fairgrounds Date: April 18th, 2009

3. Competition Rules Robot must be smaller than 2’ x 2’ x 2’ Robot must weigh 125 pounds or less Must be fully autonomous (no remote control)

4. Competition Objectives Two robots are set one foot apart in a 15’ 2” ring One of four starting positions is randomly selected Head to Head Back to Back Side to Side facing the same direction Side to Side facing opposite directions Object is to push the opposing robot out of the ring

5. Economic Analysis Electronic components, circuit board Battlekit single drive modules, Ampflow E-150 motors Colson wheels, rubber wheel swivel casters, Proximity sensors Twelve volt batteries, pillow blocks, Square steel tubing, round aluminum stock, sheet metal, Emergency stop, and fasteners.

6. Economic Analysis Final Cost: $717.64 Motors and battle kits sold separately, contrary to our initial inquiry to robotcombat.com Added $160.00 to our total cost

8. Our robot uses valve regulated sealed lead-acid gel cell batteries, which

9. Do not need to be kept upright due to no risk of spilling and

10. Also, virtually no electrolyte evaporation.

12. Problem Identification Circuit Board design problems Mounting the prefabricated battle kits Machining and mounting of the custom axles

13. Circuit Board Design Issues

14. First Board Design

15. Battle Kit Modification Issues

16. Battle Kit Modification Issues

17. Custom Axle Solution Implemented Axle

19. Optimization and Continuous Improvement We continuously noticed small things that could be improved upon with our robot, so we would disassemble what was being improved upon, improve it, and then reassemble it. This also increased our fluency with disassembly and assembly, which was very useful when maintenance was needed.

20. Generation of Alternative Designs The robot is actually the second design that we came up with. Our initial design was four wheel drive, used motors similar to the ones used last year, and was overall very similar to the robots used last year and the other groups robot. Non conventional design and implementation. 2 motors with 4 wheels 4 motors 8 wheels

21. Circuit Board Design Separation from previous designs involved a circuit board instead of a PLC.

22. Schematics

23. Relay Schematic

24. Circuit Board Design

25. Analyzing and Testing We tested the motors and traction by placing roughly seventy to eighty pounds of scrap on top of our robot while trying to orient it towards the front. We also made sure to measure and re-measure everything that we were to model in Pro ENGINEER, so that our drawings could have the most accurate dimensioning.

26. Assessment of Solutions We thought we had solved problems involving traction, maintenance, circuit board, axels and battle kits. Views on robot before competition

27. Competition Timing Delay Failure of key Circuit breaker flipping