Quote:
Originally Posted by Qbranch
p.s. No, we don't use a gumstix. A 40MHz 8-bit microcontroller (robot controller) is plenty... as long as you know your binary/integer math tricks to steer clear of floating point... 
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Whats wrong with floating point? the processor handles it for us just fine (=
looking at your plot of the robot, it looks like your heading is being compromised by an x-coordinate that is off. If you add a correction in for your x-position, it should work just fine.
...and looking at wildstang's video we are doing something similar, except using encoders as our sole positioning sensor