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November 2011

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Subject:
From:
Lloyd O'Hara <[log in to unmask]>
Reply To:
Lloyd O'Hara <[log in to unmask]>
Date:
Tue, 1 Nov 2011 23:29:38 -0400
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When I push on the back axle of the dispenser, the front of the dispenser does not raise at all.  We have had our mat since the end of August and did not make the fix until the beginning of October.  My whole point is "1M" or what ever else the measurement of "droopiness" may be, quite possibly could affect whether or not a team is able to successfully complete the bacteria tray missions.  Additionally, if there is an issue and a team has difficulty because of it and have to grab the robot, they will not only not get points for emptying a tray, they will also get a touch penalty.

If this does in fact happen (I'm thinking it won't but...), the coach will need to be able to explain the situation to the team.

Thanks,

Lloyd O'Hara
Coach, Crestwood Monarchs
  ----- Original Message ----- 
  From: Andy Traiger 
  To: [log in to unmask] 
  Sent: Tuesday, November 01, 2011 10:47 PM
  Subject: Re: [VADCFLL-L] To Drrop or not to Droop


  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

   


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  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 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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