Shane Sunada Project Leader

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Preliminary Design Review March 7, 2008
Team 4 Shane Sunada Project Leader Malcolm
Menor Project Manager Nathan Umeda Technical
Supervisor Joseph Longhi Documentation
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To design and construct a robotic mouse that
can successfully navigate to a central point of a
randomized maze and return to the starting point
with minimal collisions.
UH Micromouse maze
Shane programming Rabbit
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Chassis/Robot Goals - Robot base must be able
to rotate 180degress in a 16cm x 16cm square -
Robot base should be robust - Robot base should
be light (no excessive material) - Robot should
be easily disassembled - Robot should LOOK GOOD!
UH Micromouse Hall of Fame
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Initial Chassis Design
Very quick mock-up design completed before
proposal presentation.
Obviously the sensor board was designed too high!
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Components
Modeled a few components to scale for more
accurate prototype.
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Second attempt to Chassis Design
Possible Materials - 1/16 Aluminum sheet
(folded to channel shape as shown) - 2 Diameter
kit wheels w/ Jameco Steppers
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Current Chassis Design

• The basic idea here was to make the robot easily
  dissembled.
• 1x1x1/16 Angle Aluminum
• Jameco Stepper Motors dictated chassis
  size/design
• Machined at Waialua High School

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Testing / Lab time
Joe thinking about sensor location
Malcolm completing tutorial 3 circuit
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Testing / Lab time
Current problem Robot bottoms out at this
large maze separation. Left wheel rotates
freely.
Robot attempting 45degree turning
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Testing / Lab time
Insides of a Jameco Stepper motor
Team Captain working hard or hardly working!?!?!
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• Potential Problems
• Height of Mouse (Clearance for Cracks)
• Use larger O rings for tires?
• Stepper motor pulses inconsistent
• Mounting Rabbit
• 2mm Headers?
• Programming Rabbit
• Sometimes uMouse Lab computers dont work
  properly / Lab not open
• Purchase Serial to USB adapter?
• Rabbit Programming Cable?
• Running Software without tether
• Locking down wheels
• Flat-line motor output shafts
• Something to balance mouse on two wheels
• Currently Magic Sliders
• Will Try Miniature Bearings for slot cars

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Mouse at Center!