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November 2011

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From:
Andy Traiger <[log in to unmask]>
Reply To:
Andy Traiger <[log in to unmask]>
Date:
Tue, 1 Nov 2011 22:47:25 -0400
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All this talk about 'droopiness' has been a bit to imprecise for me to
follow.  To quantify how much our dispensers droop:  if I push on the back
axle of the dispenser, I can raise the front of the dispenser about '1M'
(i.e. about the distance between the centers of two adjacent holes on a LEGO
studless beam).  Is that about the droop that should be expected on
tournament tables and that other VA teams are experiencing on their tables?

 

I think teams that received their mats early and set them up quickly would
have had a substantial period of time in which the unmodified dispensers
were continuously pulling up on the mat.  This may have stretched the mats
around the dispensers more for teams that set up early than for teams that
set up around the time when the rules were released.  This is ust a guess,
though.

 

Andy Traiger

Vienna Robotics

 

  _____  

From: First Lego League in Virginia and DC
[mailto:[log in to unmask]] On Behalf Of B Bergenstock
Sent: Tuesday, November 01, 2011 10:26 PM
To: [log in to unmask]
Subject: Re: [VADCFLL-L] To Drrop or not to Droop

 

All of our seem to droop a little bit.  Not terrible like they did at first,
but there's a definite lean to the front. I did the fix like it was
suggested and still they lean.  I don't think it will mess up our team
either way though.
brandy

On Tue, Nov 1, 2011 at 9:39 PM, Lloyd O'Hara <[log in to unmask]> wrote:

Thanks.  I'm glad we are not the only ones seeing no droopiness.  It will be
what it will be this coming Saturday and it will be fun, no matter what
happens.

 

Lloyd O'Hara

Coach, Crestwood Monarchs

----- Original Message ----- 

From: VA/DC <mailto:[log in to unmask]>  Referee Advisor 

To: [log in to unmask] 

Sent: Tuesday, November 01, 2011 7:30 PM

Subject: Re: [VADCFLL-L] To Drrop or not to Droop

 

Beats me.  I've dual-locked a bunch of tournament kits recently, and didn't
identify any droop.  Of course, I didn't have the mats out for very long,
either.. 

 

Also, I visited a team's table this weekend and didn't see anything that
looked like a droop.

 

If the structure sags without deforming the mat (seems unlikely), then your
team's robot probably will be okay if it doesn't require millimeter-accuracy
in alignment with the lever or the dispenser platform.

 

If the structure sags and pulls up the mat, then there's probably a small
zone (on one side or the other), where the robot is more likely to be
deflected off its planned course.

 

Have Virginia/DC teams seen any "dispenser droop"?

 

 

Steve Scherr

VA/DC FLL Referee Advisor

 

On Nov 1, 2011, at 5:19 PM, Lloyd O'Hara wrote:







I am a bit confused and I'm hoping somebody can help out.  I applied the
bacteria dispenser fixes as noted and originally had some droop.  However, I
no longer have droop, does this mean I did something wrong?

 

29 - DROOPY BACTERIA DISPENSERS
True enough, the small fixes applied to the bacteria dispensers weren't
enough to stop them from leaning.  Better fixes would have either been too
difficult to describe, or would have interfered with the robot's path under
the bin.  Luckily the droop is pretty consistent, and the dispensers work
exactly as intended.  This post is official acceptance of the droop.  You've
all been working with the droop for about two months now, and we're not
going to mess with it on you.  To teams:  Expect the same droop at
tournaments as you're used to in practice.  To tournament officials:
Prepare the bacteria dispensers as per Update #12, and don't try to lessen
the droop in any other way (no tape, Dual Lock, weights, further redesign,
etc.) - it would hurt teams more than it would help.

 

Contrary to what update 29 says, It might be that some of us will be at a
disadvantage.  I moved, per instructions, the dual loc as far up on the
front legs as possible and also moved the other four up to be on the "X"'d
out boxes in the middle.  I have no dual lock on the back "X"'d out blocks
right now.

 

All of our robot and code design is based on this.  What do we need to
change, redesign, recode, and practice to not be at a disadvantage come this
Saturday at LC Bird?  Can anybody help?

 

Thanks,

 

Lloyf O'Hara

Coach, Crestwood Monarchs


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