http://forums.usfirst.org en Sat, 21 Nov 2009 03:46:34 GMT vBulletin 60 http://forums.usfirst.org/images/misc/rss.jpg http://forums.usfirst.org http://forums.usfirst.org/showthread.php?t=13422&goto=newpost Sat, 21 Nov 2009 01:38:22 GMT Is there any rule about how the competition tables are set up at an official tournament? I just looked at some pictures from an area qualifier, and the tables were set up singly, spaced out in six locations in a gym. I know that there is no mission model that touches both tables this year, but I... Is there any rule about how the competition tables are set up at an official tournament? I just looked at some pictures from an area qualifier, and the tables were set up singly, spaced out in six locations in a gym. I know that there is no mission model that touches both tables this year, but I thought that the tables had to be set up back to back. I hope no one had a robot fall off the end of the bridge!

Linda
Team 25, LEGO United ]]> Linda Zoe http://forums.usfirst.org/showthread.php?t=13422 http://forums.usfirst.org/showthread.php?t=13421&goto=newpost Sat, 21 Nov 2009 00:59:50 GMT On our FLL mat, most of the loops have a circle indicating its position and direction on the mat. There are 2 loops however (3 if you count the one on the red platform) that have no dot to indicate its position next to the yellow barrier. I'm afraid these will not be positioned the same way in each competition when the field is set up. what up. ]]> RPS http://forums.usfirst.org/showthread.php?t=13421 http://forums.usfirst.org/showthread.php?t=13420&goto=newpost Sat, 21 Nov 2009 00:59:44 GMT Has anyone got any luck on the bridge. we can't get up the bridge. ]]> Game Strategy LEGO CyberBots http://forums.usfirst.org/showthread.php?t=13420 http://forums.usfirst.org/showthread.php?t=13419&goto=newpost Fri, 20 Nov 2009 20:57:25 GMT Curious as to what some of this year's "all-rookie" teams are scoring in the robot game. Don't mean to be rude, but if your team is not all rookies, please don't respond.

We are currently scoring between 165 and 195 picking up hoops, tripping the crash vehicle, and hitting some access markers (and dummy ride-along) ]]> Game Strategy bboorman http://forums.usfirst.org/showthread.php?t=13419 http://forums.usfirst.org/showthread.php?t=13418&goto=newpost Fri, 20 Nov 2009 20:57:24 GMT Another question to this list recently reminded me of a problem our team noticed last night. The robot's free "arm" motor is very-simply mounted on the side of the robot and direct drives various arm attachments that raise and lower.

That arm in the past (and still sometimes) moves accurately according to the typical "move .25 rotation" commands. But recently, the arm has begun SOMETIMES behaving radically differently than indicated by the rotation command.

I've read about motor vs. move blocks. And I've heard comments like "reset the rotation counter before use". I've never made a practice of explicitly resenting rotation counts on my drive wheels, and I've never seen a problem of accumulated error being discussed. Drive wheels specify movement and typically brake commands.

Consequently, I'd always assumed that when I used a move block with a rotation count, that there was an IMPLICIT reset before the action is taken. I assumed that if I said "rotate .25 rotation", that the motor would always move .25 from the current motor position at the beginning of execution of that block. If that were true, why would I need to use an explicit rotation counter reset block before motor/move blocks?

I'm beginning to wonder about the root cause of our robot arm variation. The kids use a self-written menu program to select sortes. The end of each sorte, the menu program unbreaks the arm motor. If the robot finishes one sorte with arm "up", program unlocks the arm, then team member manually rotates arm down and launches next sorte...does the manual rotation amount add up as variation "error" toward the next arm move block? This would also explain why when they run their sorte again ALONE with arm already down, that it would run correctly...Hmm...

I'm hoping one of you NXTG guru's can explain how the motor/move blocks calculate completion of the programmed rotation count. Is it counted from position at the beginning of that move blocks execution? Or is it counted from the position of the motor at completion of the previous move? Is there a difference between motor and move blocks?

Yes, Dean, this is an excellent opportunity to experiment :-). But I won' be in front of another robot for at least 24 hours, and my curiosity is eating at me.

Thanks,
Wayne ]]> Robot Programming wclift http://forums.usfirst.org/showthread.php?t=13418 http://forums.usfirst.org/showthread.php?t=13417&goto=newpost Fri, 20 Nov 2009 07:42:23 GMT I did a search and couldn't find any previous questions about this, so...

I keep running out of memory, even though I still have over 30 or 48K left and the program I'm trying to download is much smaller than that. I reload the firmware (v1.28) and then I'm able to download the files. This has happened more than once.

For example, I've 3 programs totalling about 36K, I think I had about 48K left. I try to download a 25.5K program and I get the out of memory error. So I reload the firmware, and it now it takes all 4 programs and says I have 22.3K free, just as I'd expect.

I did have many more small programs at one time which I've deleted, but it doesn't really seem to free up the memory even though it says I have enough free space. I have no sound files, nothing else taking up memory except for the default system files.

I'm using NXT-G 2.0. Has anyone else seen this, or have a better solution than reloading the firmware?

Thanks,
Tom ]]> Robot Programming thrashercharged http://forums.usfirst.org/showthread.php?t=13417 http://forums.usfirst.org/showthread.php?t=13416&goto=newpost Fri, 20 Nov 2009 06:13:16 GMT I have been searching to see if there is a maximum height requirement. I haven't seen anything posted, but I remember bots being measured last year. ]]> sherwooc http://forums.usfirst.org/showthread.php?t=13416 http://forums.usfirst.org/showthread.php?t=13415&goto=newpost Fri, 20 Nov 2009 04:33:31 GMT We are looking for a team to join or others who may be interested in starting a FLL team in the Fayette Co/Peachtree City Area. Thanks for your reply...and for passing it on to others who may be interested! We are looking for a team to join or others who may be interested in starting a FLL team in the Fayette Co/Peachtree City Area. Thanks for your reply...and for passing it on to others who may be interested! ]]> Finding Others Interested in FLL myohomama http://forums.usfirst.org/showthread.php?t=13415 http://forums.usfirst.org/showthread.php?t=13414&goto=newpost Thu, 19 Nov 2009 22:32:36 GMT ok so the rule says that an attachment can only be 16 inches high, does that mean throughout the whole round or only until we start the round ok so the rule says that an attachment can only be 16 inches high, does that mean throughout the whole round or only until we start the round ]]> New York emmanuel http://forums.usfirst.org/showthread.php?t=13414 http://forums.usfirst.org/showthread.php?t=13413&goto=newpost Thu, 19 Nov 2009 21:52:56 GMT HELP!!! I need help with the motor degrees. I programed the nxt to go a certain degrees that worked before, but now it either goes too little or too much. I have tried it many times, but it still doesn't work! For instance, if i tell it to go 75 degrees forward and 135 degrees backward and 135 degrees forward, it doesn't cooperate with us and does either a little less or a little more than the programed degrees and that throws us completely off.:confused::eek:

Please help us.
Thanks,
Thunderbots:D ]]> Robot Programming thunderbots http://forums.usfirst.org/showthread.php?t=13413 http://forums.usfirst.org/showthread.php?t=13411&goto=newpost Thu, 19 Nov 2009 20:58:08 GMT What dartfish pack is everyone downloading because FIRSt did not specify that What dartfish pack is everyone downloading because FIRSt did not specify that ]]> Dartfish Software Evaluation Team 816 http://forums.usfirst.org/showthread.php?t=13411 http://forums.usfirst.org/showthread.php?t=13410&goto=newpost Thu, 19 Nov 2009 18:55:21 GMT 1391 Westtown robotics, the Metal Moose, is honored to have been chosen to evaluate Dartfish. We hope to be as useful to the entire FIRST community as possible. If you would like us to 'dartfish' your video, please send it to steve.compton@westtown.edu, and we'll try to get to it! We'd love to get some footage from Aim High from other FIRST teams - ours is particularly spotty that year and it seems like a great game to analyze. ]]> Dartfish Software Evaluation scompton http://forums.usfirst.org/showthread.php?t=13410 http://forums.usfirst.org/showthread.php?t=13409&goto=newpost Thu, 19 Nov 2009 04:16:33 GMT Rookie question here -

Does it matter whether the light sensor is mounted facing forward (sticker to the front), or sideways? I don't see why it should matter, but I thought I'd ask. ]]> Robot Programming ellspell http://forums.usfirst.org/showthread.php?t=13409 http://forums.usfirst.org/showthread.php?t=13404&goto=newpost Wed, 18 Nov 2009 18:29:02 GMT Can someone please post a link to the official Smart Moves score sheet? I want my team to practice scoring rounds using the same sheet that they will have to review at the FLL tournament. Thank you. Can someone please post a link to the official Smart Moves score sheet? I want my team to practice scoring rounds using the same sheet that they will have to review at the FLL tournament. Thank you. ]]> bongju http://forums.usfirst.org/showthread.php?t=13404 http://forums.usfirst.org/showthread.php?t=13402&goto=newpost Wed, 18 Nov 2009 14:04:46 GMT Team 115 will be covering the new 2010 control system, the 2010 dashboard software and the Labview changes at our Cupertino Beta Workshop in order to prepare teams for the upcoming season. More information about the workshop can be found here:... Team 115 will be covering the new 2010 control system, the 2010 dashboard software and the Labview changes at our Cupertino Beta Workshop in order to prepare teams for the upcoming season. More information about the workshop can be found here: http://img691.imageshack.us/img691/8...boticsbeta.jpg. The workshop is on November 21th at Monta Vista High School. For any comments or questions, email asqw1313@gmail.com. ]]> LabView asqwasqw http://forums.usfirst.org/showthread.php?t=13402