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2004 Eagle CoreBot and Mission Plans Our core robot has evolved from our first season (2002 City Sights) through our second season (2003 Mission Mars) to our current CoreBot (2004 No Limits). The similarities are unmistakable, with each season bringing refinements to improve performance. Our CoreBot is the centerpiece of our modular mission approach, and is designed to be a rugged platform for easy connection of modules.
Our original CoreBot served us well in 2002. It combined a two motor differential drive with a 5-to-1 gear ratio, a rotation sensor, a shared touch sensor (internally housed), forward side guide wheels with wheel hub knobs, and a pair of vertical braces to hold the RCX to the robot body. Our 2003 CoreBot incorporated several changes. Due to the increased tactical need for motorized attachments, the shared touch sensor was replaced with a shared third motor (internally housed). Deep anchoring of attachment points were added, to keep pegs from pulling out when modules were removed. Four side wheels (front and rear, left and right) allowed for better wall following. Four vertical braces (using angled beams to clear the gears) were implemented to attach the RCX more securely to the robot body. Our 2004 CoreBot refines the design further. Right side wheels have been modified with some flexibility (to ease turns away from the wall), and placed low to pass under the sign posts. The most major change has been in the implementation of the Eagle Overdrive, using clutch gear(s) to improve the straight tracking of our differential drive CoreBot. Briefly, using clutch gear(s) and an axle to link the left and right side gear trains, they will track together while in forward motion. While differential turning, the opposing forces will exceed the capacity of the clutch gear(s), and allow the gear trains to turn in opposite directions without linkage. Any clutch gear will eventually wear out, but improved performance results for straight tracking without other aids. We feel that this drive innovation will be of benefit to the FLL community, and we welcome all to make use of it, identified as the Eagle Overdrive. Our 2004 season mission attachments include : Our technical leader, Patrick, has rendered our various designs using ML-CAD. | |||||||||||||||||||||||||||||||||||||||||||
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Last modified: 03/30/05 All Rights Reserved © 2004 This site was built using Microsoft FrontPage 2003. |
