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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 07:18:54 -0400
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Cool idea, I like it and may borrow in the future.

----- Original Message ----- 
From: "Eric Palmer" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, October 09, 2010 7:07 AM
Subject: Re: [VADCFLL-L] using sensors


> Also our team constructs a measuring gauge with a wheel/tire the same
> size of the one on your robot. They put one of those orange pointers
> on an axle and use some beams to make a handle. They then just set it
> down with the point in a know position and then push it and count
> rotations.  360 degrees = 1 rotation.
>
> This way they don't have to guess, program, download, run and rinse
> repeat so often.
>
> It saves time.
>
> On Sat, Oct 9, 2010 at 6:30 AM, Lloyd O'Hara <[log in to unmask]> wrote:
>> Heather,
>>
>> One thing for your team to lookout for is battry charge. When the battery
>> charge lowers, it may take more time (seconds) to travel the same amount 
>> of
>> distance as it did when the battery was fully charged. (see Curt's 
>> handrill
>> analogy in a recent email).
>>
>> Our team generally uses degrees (1/360 of the circumference of the wheels
>> you are using). Degrees, as well as other sensors, can be easily measured
>> using the "View" function on the NXT.
>>
>> Lloyd
>>
>>
>> ----- Original Message ----- From: "Heather Houlden" 
>> <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Friday, October 08, 2010 10:05 PM
>> Subject: Re: [VADCFLL-L] using sensors
>>
>>
>>> 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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>>
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>
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