pic: Final 2011 Drivetrain

[poohbear]

Thank you bunches Andrew Y.

Its nice to have a helper after such criticism and mockery

I have made a few major changes to the drivetrain since posting this though...

- With the help of our mentors, we have designed a magnificent two-speed (8fps & 16fps) crab-drive instead of the previous traction drive. We think this will handle this precision-based game a little better. Sacrificing power and speed for maneuverability.
- The bot is now decagon shaped. Soon 100% of decagon robots will have won championships too watch out JVN
- The wheels are still decagons. no one worry

Parts are about to be sent out for metal bending this next Monday. (yes, we told our sponsor that it would be too excessive to use their mill)

In addition, our prototype mini-bot is driving up the pole on average in 2.2 seconds and our prototype roller-gripper quickly grabs all three types of tubes. The lift is still being designed, but I'm happy with where we are. We also are prototyping a "secret weapon" to supplement these necessary mechanisms for the game. It might give us the leading edge It seems like a good rookie season so far. I'll friend you, andrew y, on facebook and we can get together to discuss designs sometime.

[ProgramLuke]

I would be extremely hesitant to attempt a crab/swerve drive as a rookie team (or even a veteran team!!!) if you haven't done some sort of offseason project to learn how to build one. I would suggest sticking with the 6wd that comes in the KOP so that you can devote more time to your manipulator.

[BJC]

Who exactly is your sponsor?

[ratdude747]

Originally Posted by poohbear

Thank you bunches Andrew Y.

Its nice to have a helper after such criticism and mockery

I have made a few major changes to the drivetrain since posting this though...

- With the help of our mentors, we have designed a magnificent two-speed (8fps & 16fps) crab-drive instead of the previous traction drive. We think this will handle this precision-based game a little better. Sacrificing power and speed for maneuverability.
- The bot is now decagon shaped. Soon 100% of decagon robots will have won championships too watch out JVN
- The wheels are still decagons. no one worry

Parts are about to be sent out for metal bending this next Monday. (yes, we told our sponsor that it would be too excessive to use their mill)

In addition, our prototype mini-bot is driving up the pole on average in 2.2 seconds and our prototype roller-gripper quickly grabs all three types of tubes. The lift is still being designed, but I'm happy with where we are. We also are prototyping a "secret weapon" to supplement these necessary mechanisms for the game. It might give us the leading edge It seems like a good rookie season so far. I'll friend you, andrew y, on facebook and we can get together to discuss designs sometime.

you have no idea what you are getting into. my current team tried crab thier rookie year. that was all they were able to do. NO manipulator. NO driver practice. NOTHING but a drivetrain. and they started on day two. you are starting two weeks into build season. you have little to no chance of getting it right.

design and build a manipulator and mount it to the kit drivetrain. you need to get it in your head that polygon wheels are hard to make and even harder to use. cavemen invented the wheel. not the decagon. there is a reason.

not to mention oddball frame shapes are only for those who have a lot of human resources and experience.

if you are a troll, leave. go. get a life.

if you are an idiot, quit this nonsense while you are ahead.

if you are unaware, get your head into the game and rethink your work.

sorry to be uber-critical, but i do not tolerate stupidity well.

[sdcantrell56]

Wow! Way to put down any chance of inspiration for this rookie team. I don't think this is the right way to approach there ideas as out there as they may be. Perhaps you should use all of your asuperior knowledge to help instead of criticize.

Originally Posted by ratdude747

you have no idea what you are getting into. my current team tried crab thier rookie year. that was all they were able to do. NO manipulator. NO driver practice. NOTHING but a drivetrain. and they started on day two. you are starting two weeks into build season. you have little to no chance of getting it right.

design and build a manipulator and mount it to the kit drivetrain. you need to get it in your head that polygon wheels are hard to make and even harder to use. cavemen invented the wheel. not the decagon. there is a reason.

not to mention oddball frame shapes are only for those who have a lot of human resources and experience.

if you are a troll, leave. go. get a life.

if you are an idiot, quit this nonsense while you are ahead.

if you are unaware, get your head into the game and rethink your work.

sorry to be uber-critical, but i do not tolerate stupidity well.

[SudoSammich]

That probably went a bit too far with its choice of language, but I'd agree with the sentiment. Most of the experienced members in this thread are agreeing on one thing at least: attempting a swerve drive with only a month left and a rookie team isn't likely to end well.

A 6WD is solid for this competition, and a simple manipulator combined with a strong drive train will, in my opinion, serve a rookie team better than attempting a drive train they likely won't finish. At the competition there might well be teams who can help them with the last bit of programming and such, but how does that benefit the team?

[Rion Atkinson]

Soo... This has pretty much all been just repeatedly beating a dead horse since JVN's post. I will say though, I believe this isn't a troll. Though that's because of my past in FIRST. I've dealt with teams that think this would be smart.

So I'll simply say this:

I noticed that your CAD was nice(ish), however, it could use some improving. Here is a few websites that have some nice models for you to use.

FIRST CAD Library

Team 1323's CAD Library

AndyMark

AndyMark doesn't have pure CAD files. But they do have stp files on the gear boxes. Which is helpful because I can't find but two gear boxes. I have to remake the AM Gen 1 Shifter.

Hope that helps. Good luck this season.

Happy Trolling.

[Chris is me]

Originally Posted by sdcantrell56

Wow! Way to put down any chance of inspiration for this rookie team. I don't think this is the right way to approach there ideas as out there as they may be. Perhaps you should use all of your asuperior knowledge to help instead of criticize.

If you're two weeks into build and "thought about" doing the OP's drive but then "simplified" down to a two speed swerve drive - you need a reality check, fast.

Brainstorming and creativity are great, but you do actually have to build the ideas you come up with sometime.

[JesseK]

This thread is full of so much awesome only Andy Baker himself could trump it.

Poohbear, I think we're mocking your pompous attitude rather than your design. As it stands your statements defy physics (and even your followup breaks 1 of Karthik's 2 Golden Rules as Chris pointed out). If this bot worked at you've presented it, then the universe would quite literally rip itself apart from all of the electromagnetic law violations. Thus, we're going to error on the side of caution .... err, at least I will ... because I like my life, and want to live to see May without the world ripping itself apart.

[Cory]

You guys are getting trolled so hard. You honestly think that someone would machine a chassis out of a 800 lb block of what is essentially unobtanium (7071 Al), with ridiculous wheels that would clearly never roll, or then decide when you point out how ridiculous their "design" is that they're going to make a 2 speed swerve instead?

It's clearly sarcasm and this guy is clearly enjoying the heck out of the fun he's having at everyone else's expense.

[ratdude747]

I see being honest was an incorrect move. i guess i should encourage teams to try stupid ideas... (sarcasm)

i'm sorry, but spoonfeeding false encouragement is in my eyes, not helpful.

I was not mocking, i was pointing out that some basic concepts were being broken. I never said that the OP was stupid, nor did i imply such. unknowing or ignorant, perhaps, but not stupid.

[logank013]

Originally Posted by JesseK

This thread is full of so much awesome only Andy Baker himself could trump it.

Poohbear, I think we're mocking your pompous attitude rather than your design. As it stands your statements defy physics (and even your followup breaks 1 of Karthik's 2 Golden Rules as Chris pointed out). If this bot worked at you've presented it, then the universe would quite literally rip itself apart from all of the electromagnetic law violations. Thus, we're going to error on the side of caution .... err, at least I will ... because I like my life, and want to live to see May without the world ripping itself apart.

Thread Revival Warning: I saw this post in the spotlight quotes. What are Karthik's 2 Golden Rules? Or was that just made up in this post?

[Brandon Holley]

Originally Posted by poohbear

In addition, our prototype mini-bot is driving up the pole on average in 2.2 seconds

Gotta call shenanigans here...

You say it's averaging 2.2 seconds, which means in some cases it's actually going faster than that. Are you adhering to all the minibot requirements? Is the pole you are using for testing regulation size?

In our tests, and from my observations of other teams minibot postings, 2.2 seconds would be far, far, far and away the fastest minibot I've encountered. Considering A. the requirements that everyone must use to build the same minibot and B. the number of teams attempting the same challenge with said requirements, it seems unlikely that someone could build a minibot that is simply THAT far superior than any other.

As they say, pics (or in this case vids) or it didn't happen...

-Brando

[MaGiC_PiKaChU]

Originally Posted by poohbear

-the body is milled from a solid block of 7071 aluminum (with our sponsor's five axis mill) to retain the maximum structural strength.
-the wheels are decagons instead of circles. NOW can we squeeze in more than tangential contact every tenth of a rotation, therefore we get more traction.
-these four wheels are directly driven by CIMs so we can zip across the field at 154 fps according to JVN Design Calculator (great tool by the way guys).

My reaction when i saw this thread a few years ago

[BigBen]