Subject:
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RE: Classroom experiments gone awry
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Newsgroups:
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lugnet.robotics.nxt
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Date:
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Thu, 26 Apr 2007 20:40:29 GMT
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Reply-To:
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<dickswan@&antispam&sbcglobal.net>
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Viewed:
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17685 times
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I'm having trouble understanding the meaning of your results. What do
the percentages mean?
I'd also just like to check that you used the "run for 10 rotations" as
duration with "next action" indicated as stop. What speed did you use
for the motors? Highest speed will exhibit most error. With above
parameters, the robot will ramp down the speed to near zero for the stop
position and I'm not sure how well the "synchronization" follows this.
There's another interesting experiment that you can have your students
try. Use one of the straight edges of the tiles and line the robot up so
it is parallel with this straight edge. Maybe even build a jig so that
this is true. Now tell the robot to go straight for 10 rotations. See
how far off the deviation to one side of the other is. My observation is
that there is a definite "wander" from one side of the straight edge to
other that appears to be up to 0.5" off-center. Instead of floor tiles,
I was using hardwood floor.
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Message is in Reply To:
 | | Classroom experiments gone awry
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| Imagine a classroom with eight 13-year old boys, paired up with a laptop and the standard NXT Edu robot. The 9x9 inch floor tiles made perfect for a little experiment in derivation. Starting at a fixed point and heading, each team marked where the (...) (17 years ago, 26-Apr-07, to lugnet.robotics.nxt)
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