How far are you guys into designing and prototyping?
Robot is done and programming is in progress. At least version 1.0 is done.
Robot is done. It can hold 30 wiffle balls and score all of them in the buckets on the side. The intake mechanism is truly the best part.
Our autonomous can clear one ball holder and then score them in the bins that we have. 
Enjoy.
Heh.
We still haven’t received 2 of the 4 kits. So the 2 newest of our teams are still in design. A great thing that came out of that though is we have ridiculously awesome spreadsheets for modeled ball trajectories that include wind resistance and backspin. The kids also came up with a great strategy/design combo that has the potential to use as little as four motors on the entire bot, hold 36 balls, and score anywhere they please.
Other than the designs, we’re using old parts to prototype shooters.
I would be pretty impressed if i saw some pictures and or videos of these robots in action seen as how they are already complete
Snap that’s crazy, we haven’t received our new Kits yet at all, we are still trying to come up with ideas because our FRC team is going to start their own FTC team, all us FTC vets are trying to build a good programming base because last year we used NXT-G this year we are going with Robot C. And we have to hurry up SC’s competition is in December XP. Last year we had until April and we were the champs i don’t know how this year will turn out with 3 teams and all.
My team has something that moves around, and a good prototype ball launcher, but not a whole lot else =D
Does anyone have a good white paper on gear ratios?
Not necessarily specific to TETRIX, but here’s a great tutorial on gears, ratios, and more.
Very worthwhile read.
We’ve used this application to teach gears: http://www.tucows.com/preview/346223?q=GEARS. The version at this Website is free, but they (theoretically at least) have a newer release that costs money.
(Thanks to Jason Brett for finding this.)
We have a chassis done and it moves in driver mode. we need to come up with a ball delivery system. What ideas have any of you all had? We are a rookie team that are a little bit lost.
Ok, because there’s 2 or 3 robots that are done, I would love to see some videos. (I look for videos on youtube one time a day) and if you don’t want to broadcast the videos, I’m fine with that too. Thanks.
We are getting our kits today and we have a very cool design it mainly collects balls throughout the match the fires them into the off feild goal it the last 30 secs. We can hold up to 30 balls in our hopper.
If only we could see the robot XD, nice work though
We have our shooter completed and a working drivebase. Auto-mode is coming along. We still need to work on the pickup system and storage. That’s still a TON to do before Dec 12…
The shooter can throw a ball ~9 ft right now. It’s our 5th generation and the first one that works. I’ll see if I can’t post a pic/video or three after our practice tonight.
2 out of 4 of ours look like a robot! It seems slower going than usual, but that’s because they’re taking the time to do quality work the first time and unit test each subsystem so there are fewer “integration” issues and less “speedy build” at the end. So the perceived slow going is probably further along that any other year. The 3rd bot has alot of plastic forming to get correct, but it should be good to go once some parts come in, and the 4th team … well … maybe they can play defense? They’re still “designing” with only a drive train physically built ><. Seems like a harsh thing to say, but this late into build it’s time to face some sort of reality.
An interesting thing to note is the height of the spin bar – the bar is 10" off the ground, at least it is on the field we built. Anyone else notice that? It’s also 10" away from the center-area wall in most spots, so spinning it requires going in the middle, violating a rule, or pushing the design limits. Interesting indeed.
My potentially flawed interpretation of the rules says you can be in the center field structure all you want as long as you’re not touching the High Goals or blocking points from being scored into them. There is no penalty for being in the low goal at all. There are wood blocks your robot has to climb to spin the bar a significant distance, though.
You’re correct in your interpretation of the rules, though I think that the middle is a death trap. If you can climb the wall, you can climb a ball. If you climb a ball at the wrong time and are too big … your bot will hit the high goal an inur penalties. Though that’s just my synopsis of it though, and it may play out completely different. Our strategies make the assumption that we’ll never need to go into the middle and that if we may miss the middle we’ll save the shot for the outside … meaning we’ll never miss and therefore never need to go into the middle to retrieve. At least that’s the theory, though teams may very well incur 40pts of penalties just to make us miss 10+ balls.