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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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