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Totally agreed! Now the magnificant "Configurators" finally broke the silence:)) So to speak it is very inportant!
 
Allow me to offer a detail scenario - let me say you connect a sequence of MOVE blocks - going straight with both wheels, turning on one motor/wheel to make "turnung" as Steve Sweeny said, turning both wheels in the opposite directions to make "spinning" and going straight with both wheels again, and so on and so forth. If you set 75% power level for all blocks, the "wait-on-time" blocks must be inserted between the "move" blocks with the value of 0.2 second or more.
 
How do you drive your cars / trucks when you are making turns? what happened if you are NOT slowing down first?
 
 
Jin


--- On Tue, 11/3/09, Configurators <[log in to unmask]> wrote:


From: Configurators <[log in to unmask]>
Subject: Re: [VADCFLL-L] Programming/brick problem
To: [log in to unmask]
Date: Tuesday, November 3, 2009, 4:09 PM








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 dissipate allowing sensors to start from a stable platform.  
 
Time is of the essence so delay does not need to be great – sometimes fraction of a second is enough. 
 
Good luck to all
 
Configurators 
 
 
 
 
From: First Lego League in Virginia and DC [mailto:[log in to unmask]] 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 certain 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 solution.  If anyone finds a solution please post it.
 
Rusty West
Team 350
VDOT BOTS
 



From: First Lego League in Virginia and DC [mailto:[log in to unmask]] 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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