pic: 2008 FRC148 Robowrangler Robot - Tumbleweed

[JVN]

[cdm-description=photo]34208[/cdm-description]

Hi Everyone,
I posted a CAD assembly (STEP) of our 2008 Robot "Tumbleweed" for download. Lots of people have asked me for these CAD files over the years (maybe there is something interesting about a 3-wheeled, 9-sided, coaxial swerve drive?) so I wanted to cut out the middle-man. I figured maybe someone could learn something from the CAD models.

Please direct any questions to me, and I'll be happy to answer them.

Enjoy!
-John

http://www.chiefdelphi.com/media/papers/2277

[keehun]

I'm sorry, what was this used for? A bot to help practice?

And... that looks like crab drive?

But looks AWESOME! :)

[R.C.]

I'm sorry, what was this used for? A bot to help practice?

And... that looks like crab drive?

But looks AWESOME! :)

Keehun,

This Bot was their 2008 FRC Competition Robot. It also won the National Competition with Simbotics (1114) and Thunderchickens (217).

Heres the Last game on Einstein:

http://www.thebluealliance.net/tbatv/match/2008ein_f1m2

-RC

[EricH]

I'm sorry, what was this used for? A bot to help practice?

And... that looks like crab drive?
Tumbleweed is the 2008 World Champion. 3-wheel coaxial swerve drive, 9-sided robot, small enough to fit in some other robots' claws (all of which descriptors can be found either in the opening post or here (http://www.chiefdelphi.com/media/photos/31418)). The pole in the center held the flag pole and a ball-knocker-offer. Tumbleweed is a lapbot, and as such is designed for speed and maneuverability to get through or around heavy traffic.


John, how many CIMs was that really? You're showing 6...

[R.C.]

Eric, I'm pretty sure it was 4 Cims and 2 Fp's.

Found pics, yay:

http://www.chiefdelphi.com/media/photos/31434
http://www.chiefdelphi.com/media/photos/30599

-RC

[EricH]

Eric, I'm pretty sure it was 4 Cims and 2 Fp's.

Found pics, yay:

http://www.chiefdelphi.com/media/photos/31434
http://www.chiefdelphi.com/media/photos/30599

-RC
Ah, so John's being lazy and throwing in 6 CIMs instead of taking the time to do it 4 and 2? Hmmm...Just what you'd expect from a guy who plays with VEX all day...:rolleyes:

[Akash Rastogi]

Ah, so John's being lazy and throwing in 6 CIMs instead of taking the time to do it 4 and 2? Hmmm...Just what you'd expect from a guy who plays with VEX all day...:rolleyes:

Hey hey, give him some credit..:mad:


....there's lasers there too :D

[XXShadowXX]

Thank you for making this public.

[Chris is me]

You know, I was thinking earlier... isn't it true that EVERY nine-sided robot ever built has won the World Championships?

Maybe they're on to something here! :D

It's great that team 148's posting full robot CADs after the fact; being able to look at a world champion's swerve system and Archimedes screw is something my team will definitely find useful.

[keehun]

Oh wow I was so tired I didn't see the picture's title...

[JVN]

Ah, so John's being lazy and throwing in 6 CIMs instead of taking the time to do it 4 and 2? Hmmm...Just what you'd expect from a guy who plays with VEX all day...:rolleyes:

Some people model things to look pretty, some people model them so they can be built...

If it will make you feel better I can drop in the FP + AM Planetary Gearbox, but it doesn't really make any difference from a functional standpoint.

[Andy Baker]

Some people model things to look pretty, some people model them so they can be built...

If it will make you feel better I can drop in the FP + AM Planetary Gearbox, but it doesn't really make any difference from a functional standpoint.

Thanks, John. That is exactly what the AM Planetary (http://www.andymark.biz/am-0002.html) is for.

Kudos to you for releasing this CAD. For this to be available as a resource to anyone is a very generous and inspirational move.

Sincerely,
Andy B.

[AdamHeard]

Ah, so John's being lazy and throwing in 6 CIMs instead of taking the time to do it 4 and 2? Hmmm...Just what you'd expect from a guy who plays with VEX all day...:rolleyes:

Even if John didn't say it in his post, there's a lot of merit to doing this.

In 2007 We designed a drive gearbox that was supposed to be able to swap between CIMs and FP with AM planetary. I CADd as we intended to build it, and at a later point when we wanted to move motors around, we found that a CIM wouldnt fit in some places. By putting the CIM in, you're showing that there is enough clearance in all the mounting locations.

Aside from that, they're a great team posting full CAD models of great robots; I'll just say thank you.