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October 2010

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Subject:
From:
Lloyd O'Hara <[log in to unmask]>
Reply To:
Lloyd O'Hara <[log in to unmask]>
Date:
Sat, 9 Oct 2010 10:45:47 -0400
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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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