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November 2009

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First Lego League in Virginia and DC <[log in to unmask]>
Date:
Tue, 3 Nov 2009 16:53:29 -0500
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David Levy <[log in to unmask]>
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David Levy <[log in to unmask]>
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To: Configurators <[log in to unmask]>
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I agree with the Configurators but if anyone  is convinced that the  
there is a firmware problem then please attach a  simple rbt file that  
someone could look at.
I can try it on a mac and a pc.

David


Sent from my iPhone

On Nov 3, 2009, at 4:09 PM, Configurators <[log in to unmask]> wrote:

> We found multiple times that inserting time delays between  
> functional blocks will eliminate ‘skipping’ or unexpected  
> behavior.  Time delay will allow motion to settle and inertia to dis 
> sipate allowing sensors to start from a stable platform.
>
> Time is of the essence so delay does not need to be great – sometime 
> s fraction of a second is enough.
>
> Good luck to all
>
> Configurators
>
>
>
>
> From: First Lego League in Virginia and DC [mailto:VADCFLL-L@it- 
> listserv1.jmu.edu] On Behalf Of Rusty West
> Sent: Tuesday, November 03, 2009 3:03 PM
> To: [log in to unmask]
> Subject: Re: [VADCFLL-L] Programming/brick problem
>
> Ditto,
> We have had the same problem.  Sometimes it skips blocks and other  
> times it doesn’t.  We verified it by putting in sound beeps in certa 
> in areas and it skipped those beeps and the movement blocks.  We are 
>  just going to hope we get one good run when it doesn’t skip blocks. 
>   The overall program is good and the kids have thought it through.  
>  I have no idea why it is skipping blocks and haven’t found a soluti 
> on.  If anyone finds a solution please post it.
>
> Rusty West
> Team 350
> VDOT BOTS
>
> From: First Lego League in Virginia and DC [mailto:VADCFLL-L@it- 
> listserv1.jmu.edu] On Behalf Of Sonya Shaver
> Sent: Tuesday, November 03, 2009 2:36 PM
> To: [log in to unmask]
> Subject: Re: [VADCFLL-L] Programming/brick problem
>
> I'm sorry Sherene.  I don't have any answers, just to say that our  
> robot is doing weird things at times too.  Like we will run a  
> certain program and then it just starts skipping steps that are in  
> the program, for seemingly no reason.  It will do that three or four  
> times, then suddenly start working again.  I have no idea.  We are  
> getting it to work most of the time though.  It sounds like what you  
> are going through is really frustrating!  I would encourage you to  
> not pull the plug on your team competing though.  That seems unfair  
> to them with all their hard work.  The robot game is only 25% of  
> their total score.  They will still be able to talk to the judges  
> about their robot design and programming, even if their robot does  
> nothing on the actual table.  And they will give their presentation,  
> and show their teamwork!  Good luck, and I hope someone can answer  
> here!
>
> Sonya in Harrisonburg
>
>
> On Tue, Nov 3, 2009 at 1:45 PM, Sherene Silverberg <[log in to unmask]>  
> wrote:
> We're having a huge problem with our robot.
>
> the programs are not downloading from the computer to the brick  
> properly.   Despite the message on the computer saying it the  
> program has uploaded, it is hit or miss if it does.
>
> We're running firmware version 1.28 on Mac OS 10.5.8.
>
> I've done the Mac OS 10.5 firmware fix as indicated here
> http://mindstorms.lego.com/support/updates/.
>
> The programs never run the same way twice. It's like the NXT brick  
> has  a life of its own.  We deleted all the programs on the brick  
> and then downloaded just one of the programs.  When we ran the  
> program, it bore no resemblance to the one we uploaded.  Rather, it  
> looked like another one on the computer that goes by a different name.
>
> I thought to try to reset the brick but for the life of me I cannot  
> find any reset button.  Apparently "The hardware reset button is  
> located within the LEGO TECHNIC hole below the USB connector on the  
> NXT brick.".
>
> For the life of me, I cannot find this hole.
>
> If I can't find a solution ASAP, I am going to pull the plug on the  
> team competing.   We cannot waste any more hours trying to fix buggy  
> Lego equipment.
>
> Can anyone help me?  I'm at the end of my tether.
>
> thanks
>
> Sherene
>
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