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<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Or you might try different tires. jBot's are the "Road Rage"<br>after market tires:<br><br>
<<a href="http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXAGB9" target="_blank">http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXAGB9</a>><br><br>that gives jBot good enough odometry to run the 100 foot<br>
square without compass or IMU, I bet they'd work pretty<br>well on the UNI robot as well if the tail wheel sideways<br>drag is not causing too much slippage.<br></blockquote>
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<div>I think jBot's design somewhat resists turning. So, if it's driving along, and you bump the back of the robot, it will still continue pretty much the same direction. On the other hand, a "normal" three wheeled robot will easily be bumped off course doing the same thing.</div>
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<div>Also, one reason for inconsistancy in turns could be because it's so easy to turn. Again, jBot requires a very deliberate (and consistant) amount of force to turn 90 degrees.</div>
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<div>Not sure if that makes sense to anyone else, but it seems reasonable to me. :)</div>
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<div>Steve</div></div></div>