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October 2010

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Sender:
First Lego League in Virginia and DC <[log in to unmask]>
Date:
Sat, 23 Oct 2010 12:11:14 -0400
Reply-To:
Tom Bove <[log in to unmask]>
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Tom Bove <[log in to unmask]>
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To: Randy Greene <[log in to unmask]>
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Our team is using a 2 yr old mindstorm's brick and an education version
brick purchased this year.  Both have firmware 1.31 downloaded and both are
running on AA batteries (refreshed at the same time.)  We notice a
difference in how programs are being executed- I don't think the problem in
this case is related to motor differences.  For example, one brick will
execute a 90 deg turn and run a loop driving forward until the ultrasonic
makes it stop.  The other brick seems to be jumping the loop - by this I
mean it seems that while executing the turn, the ultrasonic sensor is
activated and triggering a stop before the robot has driven forward. 

Are there any other software differences I might have overlooked?  Both were
running the same program written in the education disc downloaded program.

The other variance we've seen is within loops- One robot will stay straight
with a continuous loop, whereas the other has significant drift.  I am
willing to attribute that to motor differences, but would love to hear any
other thoughts.

Thanks

Tom
Team 2280 - The Blockheads


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