good point Joe

----- Original Message ----- 
From: "Kaperick, Joe" <[log in to unmask]>
To: "Lloyd O'Hara" <[log in to unmask]>; <[log in to unmask]>
Sent: Saturday, October 09, 2010 11:02 AM
Subject: RE: [VADCFLL-L] using sensors


> 
> All very cool ideas and thoughts about ways to have the robot
> navigate and cover specific distances repeatably.  My one concern,
> especially for the newer coaches, is that these methods shouldn't be
> handed to the team "pre-packaged".   At best, they should be observing
> the problems with using a timed setting and brainstorming ideas for ways
> to make it better.  They will learn much more and incorporate those
> learnings more easily in other areas than if you just hand them a
> solution or what you as the coach thinks is a more efficient (or
> "correct") way of doing something.
> Don't mean to put down the ideas and great thoughts being passed
> around but don't want to lose the main focus of the whole exercise.
> Good luck to all!
> Joe Kaperick
> 
> -----Original Message-----
> From: First Lego League in Virginia and DC
> [mailto:[log in to unmask]] On Behalf Of Lloyd O'Hara
> Sent: Saturday, October 09, 2010 10:46 AM
> To: [log in to unmask]
> Subject: Re: [VADCFLL-L] using sensors
> 
> For older team members, that's great, my team is all 4th graders and
> they 
> are having issues with ccntemplating that 1 rotation = 360 degrees.  If,
> 
> like me, you want to make it a little easier for them, measure the 
> circumfrence of the wheel directly (cloth measuring tape works wonders)
> or 
> you can just go to the view function (motor degrees) and use the bot as
> a 
> measuring device by pushing it, with the wheels turning, from point A to
> 
> point B.  In the end it's all the same just different ways of
> approaching 
> the challenge, much like the multitude of bots and challenge solutions
> you 
> will see at a tournament.
> 
> ----- Original Message ----- 
> From: "Swayne, Dominic - swaynedd" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Saturday, October 09, 2010 10:32 AM
> Subject: Re: [VADCFLL-L] using sensors
> 
> 
>>I recommend they try another method for distance.  Time (10 sec) will 
>>remain
>> constant but the distance traveled will vary with the power of the
>> batteries.  You'll find the rotation sensors (rotations or degrees)
> will
>> give them a much more reliable metric.  You can incorporate math
> (Diameter
>> of the wheel x pi = circumference for one rotation) to calculate
> degrees 
>> of
>> rotation to achieve a given distance.
>>
>>
>> On 10/8/10 10:05 PM, "Heather Houlden" <[log in to unmask]> wrote:
>>
>>> It is my first year as well, so we are learning too. However, my kids
> are
>>> measuring the distances the robot needs to travel.
>>> We programmed the robot to travel in a straight line for a set time
> (I
>>> think it was 10 sec). Then they measured the distance travelled, and
> I
>>> had them compute the seconds per inch travelled.
>>>
>>> Then they just multiply the seconds/inch by the number of inches the
>>> robot needs to move, so that they can program the number of seconds
>>> to move.
>>> So far it seems to be working OK for them. There may be an easier way
>>> to do it, but this is what they came up with.
>>> Hope this helps!
>>> Heather
>>> Team Blockbusters
>>>
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